From 7c383be1542368f2601015d9fc2a417197677677 Mon Sep 17 00:00:00 2001
From: Harsh Sharma <92harshsharma@gmail.com>
Date: Wed, 13 Jun 2018 13:24:54 -0500
Subject: Initial Commit

---
 libloragw/src/agc_fw.var          |  529 +++++++++++
 libloragw/src/arb_fw.var          |  529 +++++++++++
 libloragw/src/cal_fw.var          |  529 +++++++++++
 libloragw/src/loragw_aux.c        |   61 ++
 libloragw/src/loragw_fpga.c       |  352 ++++++++
 libloragw/src/loragw_gps.c        |  835 ++++++++++++++++++
 libloragw/src/loragw_hal.c        | 1767 +++++++++++++++++++++++++++++++++++++
 libloragw/src/loragw_lbt.c        |  391 ++++++++
 libloragw/src/loragw_radio.c      |  562 ++++++++++++
 libloragw/src/loragw_reg.c        |  819 +++++++++++++++++
 libloragw/src/loragw_spi.native.c |  385 ++++++++
 11 files changed, 6759 insertions(+)
 create mode 100644 libloragw/src/agc_fw.var
 create mode 100644 libloragw/src/arb_fw.var
 create mode 100644 libloragw/src/cal_fw.var
 create mode 100644 libloragw/src/loragw_aux.c
 create mode 100644 libloragw/src/loragw_fpga.c
 create mode 100644 libloragw/src/loragw_gps.c
 create mode 100644 libloragw/src/loragw_hal.c
 create mode 100644 libloragw/src/loragw_lbt.c
 create mode 100644 libloragw/src/loragw_radio.c
 create mode 100644 libloragw/src/loragw_reg.c
 create mode 100644 libloragw/src/loragw_spi.native.c

(limited to 'libloragw/src')

diff --git a/libloragw/src/agc_fw.var b/libloragw/src/agc_fw.var
new file mode 100644
index 0000000..5083a0e
--- /dev/null
+++ b/libloragw/src/agc_fw.var
@@ -0,0 +1,529 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+	AGC firmware
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Matthieu Leurent
+*/
+
+static uint8_t agc_firmware[MCU_AGC_FW_BYTE] = {
+0x8A, 0x51, 0x11, 0x28, 0xFF, 0xBF, 0xFF, 0xBF, 0x80, 0x40, 0x03, 0x4E, 0x83, 0x52, 0x03, 0x53, 
+0xAC, 0x00, 0x04, 0x88, 0xAD, 0x40, 0x0A, 0xC8, 0xAE, 0x40, 0x01, 0x88, 0xAF, 0x80, 0x8A, 0x51, 
+0x13, 0x68, 0x8A, 0x51, 0x59, 0x2D, 0x8B, 0xDC, 0x1A, 0x68, 0xA0, 0xE0, 0x8A, 0x51, 0x27, 0x60, 
+0x40, 0xF0, 0x9B, 0x40, 0x10, 0xF0, 0x8B, 0x00, 0x2F, 0x88, 0x81, 0x80, 0x2E, 0x48, 0x8A, 0xC0, 
+0x2D, 0x48, 0x84, 0x80, 0x2C, 0x8E, 0x83, 0xC0, 0x80, 0x0E, 0x00, 0xCE, 0x09, 0x80, 0x95, 0x41, 
+0x96, 0x41, 0x97, 0x81, 0x98, 0x01, 0x99, 0x41, 0x9A, 0x41, 0x9B, 0x81, 0x9C, 0x41, 0x9E, 0x81, 
+0x19, 0x54, 0x19, 0x95, 0x18, 0x56, 0x8B, 0x41, 0xD4, 0x41, 0x02, 0xF0, 0x54, 0x02, 0x03, 0x18, 
+0x59, 0xA8, 0x54, 0x08, 0x51, 0x3E, 0x84, 0x80, 0x83, 0x93, 0x80, 0x81, 0x54, 0x08, 0x5D, 0xBE, 
+0x84, 0x80, 0x07, 0x70, 0x80, 0x40, 0x54, 0x08, 0x72, 0x60, 0x8A, 0x51, 0x54, 0x08, 0x5D, 0xBE, 
+0x84, 0x80, 0x00, 0xCE, 0xF0, 0x39, 0x96, 0x00, 0x54, 0x9C, 0x52, 0x68, 0x83, 0x52, 0x03, 0x53, 
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+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF  
+};
diff --git a/libloragw/src/arb_fw.var b/libloragw/src/arb_fw.var
new file mode 100644
index 0000000..7f06906
--- /dev/null
+++ b/libloragw/src/arb_fw.var
@@ -0,0 +1,529 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+	Arbiter firmware
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Matthieu Leurent
+*/
+
+static uint8_t arb_firmware[MCU_ARB_FW_BYTE] = {
+0x8A, 0x51, 0xAE, 0x6E, 0x00, 0xB0, 0x8A, 0xC0, 0x04, 0x88, 0x84, 0x0A, 0x82, 0x47, 0x00, 0xF4, 
+0x07, 0xB4, 0x06, 0x74, 0x05, 0x74, 0x04, 0x34, 0x03, 0x74, 0x02, 0x34, 0x01, 0x34, 0x00, 0xF4, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
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+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 
+0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF, 0xFF, 0xBF  
+};
diff --git a/libloragw/src/cal_fw.var b/libloragw/src/cal_fw.var
new file mode 100644
index 0000000..8c9389e
--- /dev/null
+++ b/libloragw/src/cal_fw.var
@@ -0,0 +1,529 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+	Calibration firmware
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Matthieu Leurent
+*/
+
+static uint8_t cal_firmware[MCU_AGC_FW_BYTE] = {
+0x8A, 0x51, 0x6F, 0x28, 0x00, 0xB0, 0x8A, 0xC0, 0x04, 0x88, 0x84, 0x0A, 0x82, 0x47, 0x00, 0xF4, 
+0x18, 0x74, 0x1C, 0xB4, 0x1E, 0xF4, 0x20, 0x34, 0x22, 0x74, 0x23, 0xB4, 0x24, 0x74, 0x25, 0xB4, 
+0x26, 0xB4, 0x27, 0xF4, 0x28, 0x74, 0x28, 0x74, 0x29, 0xB4, 0x2A, 0xB4, 0x2A, 0xB4, 0x2B, 0xF4, 
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+0xA4, 0xC0, 0x03, 0xD0, 0xA4, 0x8D, 0x03, 0xD0, 0xA4, 0x8D, 0x03, 0xD0, 0xA4, 0x8D, 0x83, 0x96, 
+0x6D, 0x88, 0x83, 0x52, 0xA5, 0x00, 0x03, 0xD0, 0xA5, 0xCD, 0x03, 0xD0, 0xA5, 0xCD, 0x83, 0x96, 
+0x03, 0xD0, 0x6E, 0x0D, 0x83, 0x52, 0x25, 0x04, 0x24, 0xC4, 0x61, 0x04, 0xA1, 0xC0, 0x26, 0x08, 
+0xA2, 0xC0, 0x10, 0xF0, 0xF0, 0x6F, 0xA4, 0x01, 0x24, 0xC8, 0xEA, 0xBE, 0x84, 0x80, 0x83, 0x93, 
+0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x00, 0xB0, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 
+0xE0, 0x3E, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x01, 0xF0, 0xF0, 0x27, 
+0x8A, 0x95, 0x24, 0xC8, 0xDE, 0xFE, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 
+0x02, 0xF0, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xDA, 0xBE, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 
+0x24, 0xC8, 0xA2, 0xC0, 0x03, 0x30, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xE8, 0x7E, 0x84, 0x80, 
+0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x04, 0xF0, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 
+0xE6, 0xBE, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x05, 0x30, 0xF0, 0x27, 
+0x8A, 0x95, 0x24, 0xC8, 0xE4, 0x7E, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 
+0x06, 0x30, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xAC, 0x7E, 0x84, 0x80, 0x83, 0xD7, 0x00, 0x48, 
+0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x08, 0xF0, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xA8, 0x3E, 
+0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x0A, 0x30, 0xF0, 0x27, 0x8A, 0x95, 
+0x24, 0xC8, 0xAA, 0x7E, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x0B, 0x70, 
+0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xA2, 0x3E, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 
+0xA2, 0xC0, 0x0C, 0x30, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xA4, 0x3E, 0x84, 0x80, 0x00, 0x48, 
+0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x0D, 0x70, 0xF0, 0x27, 0x8A, 0x95, 0x24, 0xC8, 0xA6, 0x7E, 
+0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x0E, 0x70, 0xF0, 0x27, 0x8A, 0x95, 
+0x24, 0xC8, 0xA0, 0xFE, 0x84, 0x80, 0x00, 0x48, 0xA1, 0xC0, 0x24, 0xC8, 0xA2, 0xC0, 0x10, 0xF0, 
+0xF0, 0x27, 0x8A, 0x95, 0x02, 0xF0, 0xA4, 0x4A, 0x24, 0xC2, 0x03, 0x18, 0x08, 0x40, 0x5C, 0x6F, 
+0xA3, 0x00, 0x22, 0xC8, 0x03, 0x59, 0xFA, 0xEF, 0x21, 0xC8, 0x88, 0x80, 0x23, 0x08, 0x80, 0x38, 
+0x86, 0xC0, 0x08, 0x40, 0x21, 0xC8, 0x88, 0x80, 0x23, 0x08, 0x80, 0x38, 0x85, 0xC0, 0x08, 0x40  
+};
diff --git a/libloragw/src/loragw_aux.c b/libloragw/src/loragw_aux.c
new file mode 100644
index 0000000..c921296
--- /dev/null
+++ b/libloragw/src/loragw_aux.c
@@ -0,0 +1,61 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    LoRa concentrator HAL auxiliary functions
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Sylvain Miermont
+*/
+
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+/* fix an issue between POSIX and C99 */
+#if __STDC_VERSION__ >= 199901L
+    #define _XOPEN_SOURCE 600
+#else
+    #define _XOPEN_SOURCE 500
+#endif
+
+#include <stdio.h>  /* printf fprintf */
+#include <time.h>   /* clock_nanosleep */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#if DEBUG_AUX == 1
+    #define DEBUG_MSG(str)                fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)    fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+#endif
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+/* This implementation is POSIX-pecific and require a fix to be compatible with C99 */
+void wait_ms(unsigned long a) {
+    struct timespec dly;
+    struct timespec rem;
+
+    dly.tv_sec = a / 1000;
+    dly.tv_nsec = ((long)a % 1000) * 1000000;
+
+    DEBUG_PRINTF("NOTE dly: %ld sec %ld ns\n", dly.tv_sec, dly.tv_nsec);
+
+    if((dly.tv_sec > 0) || ((dly.tv_sec == 0) && (dly.tv_nsec > 100000))) {
+        clock_nanosleep(CLOCK_MONOTONIC, 0, &dly, &rem);
+        DEBUG_PRINTF("NOTE remain: %ld sec %ld ns\n", rem.tv_sec, rem.tv_nsec);
+    }
+    return;
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_fpga.c b/libloragw/src/loragw_fpga.c
new file mode 100644
index 0000000..465f43e
--- /dev/null
+++ b/libloragw/src/loragw_fpga.c
@@ -0,0 +1,352 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Functions used to handle FPGA register access for LoRa concentrator.
+    Registers are addressed by name.
+    Multi-bytes registers are handled automatically.
+    Read-modify-write is handled automatically.
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Michael Coracin
+*/
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+
+#include "loragw_spi.h"
+#include "loragw_aux.h"
+#include "loragw_hal.h"
+#include "loragw_reg.h"
+#include "loragw_fpga.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_REG == 1
+    #define DEBUG_MSG(str)                fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)    fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define CHECK_NULL(a)                if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_REG_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define CHECK_NULL(a)                if(a==NULL){return LGW_REG_ERROR;}
+#endif
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+/*
+auto generated register mapping for C code : 11-Jul-2013 13:20:40
+this file contains autogenerated C struct used to access the LoRa register from the Primer firmware
+this file is autogenerated from registers description
+293 registers are defined
+*/
+const struct lgw_reg_s fpga_regs[LGW_FPGA_TOTALREGS] = {
+    {-1,0,0,0,1,0,0}, /* SOFT_RESET */
+    {-1,0,1,0,4,1,0}, /* FPGA_FEATURE */
+    {-1,0,5,0,3,1,0}, /* LBT_INITIAL_FREQ */
+    {-1,1,0,0,8,1,0}, /* VERSION */
+    {-1,2,0,0,8,1,0}, /* FPGA_STATUS */
+    {-1,3,0,0,1,0,0}, /* FPGA_CTRL_FEATURE_START */
+    {-1,3,1,0,1,0,0}, /* FPGA_CTRL_RADIO_RESET */
+    {-1,3,2,0,1,0,0}, /* FPGA_CTRL_INPUT_SYNC_I */
+    {-1,3,3,0,1,0,0}, /* FPGA_CTRL_INPUT_SYNC_Q */
+    {-1,3,4,0,1,0,0}, /* FPGA_CTRL_OUTPUT_SYNC */
+    {-1,3,5,0,1,0,0}, /* FPGA_CTRL_INVERT_IQ */
+    {-1,3,6,0,1,0,0}, /* FPGA_CTRL_ACCESS_HISTO_MEM */
+    {-1,3,7,0,1,0,0}, /* FPGA_CTRL_CLEAR_HISTO_MEM */
+    {-1,4,0,0,8,0,0}, /* HISTO_RAM_ADDR */
+    {-1,5,0,0,8,1,0}, /* HISTO_RAM_DATA */
+    {-1,8,0,0,16,0,1000}, /* HISTO_NB_READ */
+    {-1,14,0,0,16,1,0}, /* LBT_TIMESTAMP_CH */
+    {-1,17,0,0,4,0,0}, /* LBT_TIMESTAMP_SELECT_CH */
+    {-1,18,0,0,8,0,0}, /* LBT_CH0_FREQ_OFFSET */
+    {-1,19,0,0,8,0,0}, /* LBT_CH1_FREQ_OFFSET */
+    {-1,20,0,0,8,0,0}, /* LBT_CH2_FREQ_OFFSET */
+    {-1,21,0,0,8,0,0}, /* LBT_CH3_FREQ_OFFSET */
+    {-1,22,0,0,8,0,0}, /* LBT_CH4_FREQ_OFFSET */
+    {-1,23,0,0,8,0,0}, /* LBT_CH5_FREQ_OFFSET */
+    {-1,24,0,0,8,0,0}, /* LBT_CH6_FREQ_OFFSET */
+    {-1,25,0,0,8,0,0}, /* LBT_CH7_FREQ_OFFSET */
+    {-1,26,0,0,8,0,0}, /* SCAN_FREQ_OFFSET */
+    {-1,28,0,0,1,0,0}, /* LBT_SCAN_TIME_CH0 */
+    {-1,28,1,0,1,0,0}, /* LBT_SCAN_TIME_CH1 */
+    {-1,28,2,0,1,0,0}, /* LBT_SCAN_TIME_CH2 */
+    {-1,28,3,0,1,0,0}, /* LBT_SCAN_TIME_CH3 */
+    {-1,28,4,0,1,0,0}, /* LBT_SCAN_TIME_CH4 */
+    {-1,28,5,0,1,0,0}, /* LBT_SCAN_TIME_CH5 */
+    {-1,28,6,0,1,0,0}, /* LBT_SCAN_TIME_CH6 */
+    {-1,28,7,0,1,0,0}, /* LBT_SCAN_TIME_CH7 */
+    {-1,30,0,0,8,0,160}, /* RSSI_TARGET */
+    {-1,31,0,0,24,0,0}, /* HISTO_SCAN_FREQ */
+    {-1,34,0,0,6,0,0} /* NOTCH_FREQ_OFFSET */
+};
+
+/* -------------------------------------------------------------------------- */
+/* --- INTERNAL SHARED VARIABLES -------------------------------------------- */
+
+extern void *lgw_spi_target; /*! generic pointer to the SPI device */
+extern uint8_t lgw_spi_mux_mode; /*! current SPI mux mode used */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+static bool tx_notch_support = false;
+static uint8_t tx_notch_offset;
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS ---------------------------------------------------- */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+float lgw_fpga_get_tx_notch_delay(void) {
+    float tx_notch_delay;
+
+    if (tx_notch_support == false) {
+        return 0;
+    }
+
+    /* Notch filtering performed by FPGA adds a constant delay (group delay) that we need to compensate */
+    tx_notch_delay = (31.25 * ((64 + tx_notch_offset) / 2)) / 1E3; /* 32MHz => 31.25ns */
+
+    return tx_notch_delay;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_fpga_configure(uint32_t tx_notch_freq) {
+    int x;
+    int32_t val;
+    bool spectral_scan_support, lbt_support;
+
+    /* Check input parameters */
+    if ((tx_notch_freq < LGW_MIN_NOTCH_FREQ) || (tx_notch_freq > LGW_MAX_NOTCH_FREQ)) {
+        DEBUG_PRINTF("WARNING: FPGA TX notch frequency is out of range (%u - [%u..%u]), setting it to default (%u)\n", tx_notch_freq, LGW_MIN_NOTCH_FREQ, LGW_MAX_NOTCH_FREQ, LGW_DEFAULT_NOTCH_FREQ);
+        tx_notch_freq = LGW_DEFAULT_NOTCH_FREQ;
+    }
+
+    /* Get supported FPGA features */
+    printf("INFO: FPGA supported features:");
+    lgw_fpga_reg_r(LGW_FPGA_FEATURE, &val);
+    tx_notch_support = TAKE_N_BITS_FROM((uint8_t)val, 0, 1);
+    if (tx_notch_support == true) {
+        printf(" [TX filter] ");
+    }
+    spectral_scan_support = TAKE_N_BITS_FROM((uint8_t)val, 1, 1);
+    if (spectral_scan_support == true) {
+        printf(" [Spectral Scan] ");
+    }
+    lbt_support = TAKE_N_BITS_FROM((uint8_t)val, 2, 1);
+    if (lbt_support == true) {
+        printf(" [LBT] ");
+    }
+    printf("\n");
+
+    x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_INPUT_SYNC_I, 1);
+    x |= lgw_fpga_reg_w(LGW_FPGA_CTRL_INPUT_SYNC_Q, 1);
+    x |= lgw_fpga_reg_w(LGW_FPGA_CTRL_OUTPUT_SYNC, 0);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure FPGA TX synchro\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* Required for Semtech AP2 reference design */
+    x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_INVERT_IQ, 1);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure FPGA polarity\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* Configure TX notch filter */
+    if (tx_notch_support == true) {
+        tx_notch_offset = (32E6 / (2*tx_notch_freq)) - 64;
+        x = lgw_fpga_reg_w(LGW_FPGA_NOTCH_FREQ_OFFSET, (int32_t)tx_notch_offset);
+        if (x != LGW_REG_SUCCESS) {
+            DEBUG_MSG("ERROR: Failed to configure FPGA TX notch filter\n");
+            return LGW_REG_ERROR;
+        }
+
+        /* Readback to check that notch frequency is programmable */
+        x = lgw_fpga_reg_r(LGW_FPGA_NOTCH_FREQ_OFFSET, &val);
+        if (x != LGW_REG_SUCCESS) {
+            DEBUG_MSG("ERROR: Failed to read FPGA TX notch frequency\n");
+            return LGW_REG_ERROR;
+        }
+        if (val != tx_notch_offset) {
+            DEBUG_MSG("WARNING: TX notch filter frequency is not programmable (check your FPGA image)\n");
+        } else {
+            DEBUG_PRINTF("INFO: TX notch filter frequency set to %u (%i)\n", tx_notch_freq, tx_notch_offset);
+        }
+    }
+
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Write to a register addressed by name */
+int lgw_fpga_reg_w(uint16_t register_id, int32_t reg_value) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    if (register_id >= LGW_FPGA_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if (lgw_spi_target == NULL) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = fpga_regs[register_id];
+
+    /* reject write to read-only registers */
+    if (r.rdon == 1){
+        DEBUG_MSG("ERROR: TRYING TO WRITE A READ-ONLY REGISTER\n");
+        return LGW_REG_ERROR;
+    }
+
+    spi_stat += reg_w_align32(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_FPGA, r, reg_value);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Read to a register addressed by name */
+int lgw_fpga_reg_r(uint16_t register_id, int32_t *reg_value) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(reg_value);
+    if (register_id >= LGW_FPGA_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if (lgw_spi_target == NULL) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = fpga_regs[register_id];
+
+    spi_stat += reg_r_align32(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_FPGA, r, reg_value);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Point to a register by name and do a burst write */
+int lgw_fpga_reg_wb(uint16_t register_id, uint8_t *data, uint16_t size) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_REG_ERROR;
+    }
+    if (register_id >= LGW_FPGA_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if (lgw_spi_target == NULL) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = fpga_regs[register_id];
+
+    /* reject write to read-only registers */
+    if (r.rdon == 1){
+        DEBUG_MSG("ERROR: TRYING TO BURST WRITE A READ-ONLY REGISTER\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* do the burst write */
+    spi_stat += lgw_spi_wb(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_FPGA, r.addr, data, size);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER BURST WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Point to a register by name and do a burst read */
+int lgw_fpga_reg_rb(uint16_t register_id, uint8_t *data, uint16_t size) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_REG_ERROR;
+    }
+    if (register_id >= LGW_FPGA_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if (lgw_spi_target == NULL) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = fpga_regs[register_id];
+
+    /* do the burst read */
+    spi_stat += lgw_spi_rb(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_FPGA, r.addr, data, size);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER BURST READ\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_gps.c b/libloragw/src/loragw_gps.c
new file mode 100644
index 0000000..c0e0ded
--- /dev/null
+++ b/libloragw/src/loragw_gps.c
@@ -0,0 +1,835 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Library of functions to manage a GNSS module (typically GPS) for accurate
+    timestamping of packets and synchronisation of gateways.
+    A limited set of module brands/models are supported.
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Michael Coracin
+*/
+
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#define _GNU_SOURCE     /* needed for qsort_r to be defined */
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+#include <string.h>     /* memcpy */
+
+#include <time.h>       /* struct timespec */
+#include <fcntl.h>      /* open */
+#include <termios.h>    /* tcflush */
+#include <math.h>       /* modf */
+
+#include <stdlib.h>
+
+#include "loragw_gps.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_GPS == 1
+    #define DEBUG_MSG(args...)  fprintf(stderr, args)
+    #define DEBUG_ARRAY(a,b,c)  for(a=0;a<b;++a) fprintf(stderr,"%x.",c[a]);fprintf(stderr,"end\n")
+    #define CHECK_NULL(a)       if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_GPS_ERROR;}
+#else
+    #define DEBUG_MSG(args...)
+    #define DEBUG_ARRAY(a,b,c)  for(a=0;a!=0;){}
+    #define CHECK_NULL(a)       if(a==NULL){return LGW_GPS_ERROR;}
+#endif
+#define TRACE()         fprintf(stderr, "@ %s %d\n", __FUNCTION__, __LINE__);
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define TS_CPS              1E6 /* count-per-second of the timestamp counter */
+#define PLUS_10PPM          1.00001
+#define MINUS_10PPM         0.99999
+#define DEFAULT_BAUDRATE    B9600
+
+#define UBX_MSG_NAVTIMEGPS_LEN  16
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+
+/* result of the NMEA parsing */
+static short gps_yea = 0; /* year (2 or 4 digits) */
+static short gps_mon = 0; /* month (1-12) */
+static short gps_day = 0; /* day of the month (1-31) */
+static short gps_hou = 0; /* hours (0-23) */
+static short gps_min = 0; /* minutes (0-59) */
+static short gps_sec = 0; /* seconds (0-60)(60 is for leap second) */
+static float gps_fra = 0.0; /* fractions of seconds (<1) */
+static bool gps_time_ok = false;
+static int16_t gps_week = 0; /* GPS week number of the navigation epoch */
+static uint32_t gps_iTOW = 0; /* GPS time of week in milliseconds */
+static int32_t gps_fTOW = 0; /* Fractional part of iTOW (+/-500000) in nanosec */
+
+static short gps_dla = 0; /* degrees of latitude */
+static double gps_mla = 0.0; /* minutes of latitude */
+static char gps_ola = 0; /* orientation (N-S) of latitude */
+static short gps_dlo = 0; /* degrees of longitude */
+static double gps_mlo = 0.0; /* minutes of longitude */
+static char gps_olo = 0; /* orientation (E-W) of longitude */
+static short gps_alt = 0; /* altitude */
+static bool gps_pos_ok = false;
+
+static char gps_mod = 'N'; /* GPS mode (N no fix, A autonomous, D differential) */
+static short gps_sat = 0; /* number of satellites used for fix */
+
+static struct termios ttyopt_restore;
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DECLARATION ---------------------------------------- */
+
+static int nmea_checksum(const char *nmea_string, int buff_size, char *checksum);
+
+static char nibble_to_hexchar(uint8_t a);
+
+static bool validate_nmea_checksum(const char *serial_buff, int buff_size);
+
+static bool match_label(const char *s, char *label, int size, char wildcard);
+
+static int str_chop(char *s, int buff_size, char separator, int *idx_ary, int max_idx);
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
+
+/*
+Calculate the checksum for a NMEA string
+Skip the first '$' if necessary and calculate checksum until '*' character is
+reached (or buff_size exceeded).
+Checksum must point to a 2-byte (or more) char array.
+Return position of the checksum in the string
+*/
+static int nmea_checksum(const char *nmea_string, int buff_size, char *checksum) {
+    int i = 0;
+    uint8_t check_num = 0;
+
+    /* check input parameters */
+    if ((nmea_string == NULL) ||  (checksum == NULL) || (buff_size <= 1)) {
+        DEBUG_MSG("Invalid parameters for nmea_checksum\n");
+        return -1;
+    }
+
+    /* skip the first '$' if necessary */
+    if (nmea_string[i] == '$') {
+        i += 1;
+    }
+
+    /* xor until '*' or max length is reached */
+    while (nmea_string[i] != '*') {
+        check_num ^= nmea_string[i];
+        i += 1;
+        if (i >= buff_size) {
+            DEBUG_MSG("Maximum length reached for nmea_checksum\n");
+            return -1;
+        }
+    }
+
+    /* Convert checksum value to 2 hexadecimal characters */
+    checksum[0] = nibble_to_hexchar(check_num / 16); /* upper nibble */
+    checksum[1] = nibble_to_hexchar(check_num % 16); /* lower nibble */
+
+    return i + 1;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+static char nibble_to_hexchar(uint8_t a) {
+    if (a < 10) {
+        return '0' + a;
+    } else if (a < 16) {
+        return 'A' + (a-10);
+    } else {
+        return '?';
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/*
+Calculate the checksum of a NMEA frame and compare it to the checksum that is
+present at the end of it.
+Return true if it matches
+*/
+static bool validate_nmea_checksum(const char *serial_buff, int buff_size) {
+    int checksum_index;
+    char checksum[2]; /* 2 characters to calculate NMEA checksum */
+
+    checksum_index = nmea_checksum(serial_buff, buff_size, checksum);
+
+    /* could we calculate a verification checksum ? */
+    if (checksum_index < 0) {
+        DEBUG_MSG("ERROR: IMPOSSIBLE TO PARSE NMEA SENTENCE\n");
+        return false;
+    }
+
+    /* check if there are enough char in the serial buffer to read checksum */
+    if (checksum_index >= (buff_size - 2)) {
+        DEBUG_MSG("ERROR: IMPOSSIBLE TO READ NMEA SENTENCE CHECKSUM\n");
+        return false;
+    }
+
+    /* check the checksum per se */
+    if ((serial_buff[checksum_index] == checksum[0]) && (serial_buff[checksum_index+1] == checksum[1])) {
+        return true;
+    } else {
+        DEBUG_MSG("ERROR: NMEA CHECKSUM %c%c DOESN'T MATCH VERIFICATION CHECKSUM %c%c\n", serial_buff[checksum_index], serial_buff[checksum_index+1], checksum[0], checksum[1]);
+        return false;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/*
+Return true if the "label" string (can contain wildcard characters) matches
+the begining of the "s" string
+*/
+static bool match_label(const char *s, char *label, int size, char wildcard) {
+    int i;
+
+    for (i=0; i < size; i++) {
+        if (label[i] == wildcard) continue;
+        if (label[i] != s[i]) return false;
+    }
+    return true;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/*
+Chop a string into smaller strings
+Replace every separator in the input character buffer by a null character so
+that all s[index] are valid strings.
+Populate an array of integer 'idx_ary' representing indexes of token in the
+string.
+buff_size and max_idx are there to prevent segfaults.
+Return the number of token found (number of idx_ary filled).
+*/
+int str_chop(char *s, int buff_size, char separator, int *idx_ary, int max_idx) {
+    int i = 0; /* index in the string */
+    int j = 0; /* index in the result array */
+
+    if ((s == NULL) || (buff_size < 0) || (separator == 0) || (idx_ary == NULL) || (max_idx < 0)) {
+        /* unsafe to do anything */
+        return -1;
+    }
+    if ((buff_size == 0) || (max_idx == 0)) {
+        /* nothing to do */
+        return 0;
+    }
+    s[buff_size - 1] = 0; /* add string terminator at the end of the buffer, just to be sure */
+    idx_ary[j] = 0;
+    j += 1;
+    /* loop until string terminator is reached */
+    while (s[i] != 0) {
+        if (s[i] == separator) {
+            s[i] = 0; /* replace separator by string terminator */
+            if (j >= max_idx) { /* no more room in the index array */
+                return j;
+            }
+            idx_ary[j] = i+1; /* next token start after replaced separator */
+            ++j;
+        }
+        ++i;
+    }
+    return j;
+}
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+int lgw_gps_enable(char *tty_path, char *gps_family, speed_t target_brate, int *fd_ptr) {
+    int i;
+    struct termios ttyopt; /* serial port options */
+    int gps_tty_dev; /* file descriptor to the serial port of the GNSS module */
+    uint8_t ubx_cmd_timegps[UBX_MSG_NAVTIMEGPS_LEN] = {
+                    0xB5, 0x62, /* UBX Sync Chars */
+                    0x06, 0x01, /* CFG-MSG Class/ID */
+                    0x08, 0x00, /* Payload length */
+                    0x01, 0x20, 0x00, 0x01, 0x01, 0x00, 0x00, 0x00, /* Enable NAV-TIMEGPS output on serial */
+                    0x32, 0x94 }; /* Checksum */
+    ssize_t num_written;
+
+    /* check input parameters */
+    CHECK_NULL(tty_path);
+    CHECK_NULL(fd_ptr);
+
+    /* open TTY device */
+    gps_tty_dev = open(tty_path, O_RDWR | O_NOCTTY);
+    if (gps_tty_dev <= 0) {
+        DEBUG_MSG("ERROR: TTY PORT FAIL TO OPEN, CHECK PATH AND ACCESS RIGHTS\n");
+        return LGW_GPS_ERROR;
+    }
+    *fd_ptr = gps_tty_dev;
+
+    /* manage the different GPS modules families */
+    if (gps_family == NULL) {
+        DEBUG_MSG("WARNING: this version of GPS module may not be supported\n");
+    } else if (strncmp(gps_family, "ubx7", 4) != 0) {
+        /* The current implementation relies on proprietary messages from U-Blox */
+        /* GPS modules (UBX, NAV-TIMEGPS...) and has only be tested with a u-blox 7. */
+        /* Those messages allow to get NATIVE GPS time (no leap seconds) required */
+        /* for class-B handling and GPS synchronization */
+        /* see lgw_parse_ubx() function for details */
+        DEBUG_MSG("WARNING: this version of GPS module may not be supported\n");
+    }
+
+    /* manage the target bitrate */
+    if (target_brate != 0) {
+        DEBUG_MSG("WARNING: target_brate parameter ignored for now\n"); // TODO
+    }
+
+    /* get actual serial port configuration */
+    i = tcgetattr(gps_tty_dev, &ttyopt);
+    if (i != 0) {
+        DEBUG_MSG("ERROR: IMPOSSIBLE TO GET TTY PORT CONFIGURATION\n");
+        return LGW_GPS_ERROR;
+    }
+
+    /* Save current serial port configuration for restoring later */
+    memcpy(&ttyopt_restore, &ttyopt, sizeof ttyopt);
+
+    /* update baudrates */
+    cfsetispeed(&ttyopt, DEFAULT_BAUDRATE);
+    cfsetospeed(&ttyopt, DEFAULT_BAUDRATE);
+
+    /* update terminal parameters */
+    /* The following configuration should allow to:
+            - Get ASCII NMEA messages
+            - Get UBX binary messages
+            - Send UBX binary commands
+        Note: as binary data have to be read/written, we need to disable
+              various character processing to avoid loosing data */
+    /* Control Modes */
+    ttyopt.c_cflag |= CLOCAL;  /* local connection, no modem control */
+    ttyopt.c_cflag |= CREAD;   /* enable receiving characters */
+    ttyopt.c_cflag |= CS8;     /* 8 bit frames */
+    ttyopt.c_cflag &= ~PARENB; /* no parity */
+    ttyopt.c_cflag &= ~CSTOPB; /* one stop bit */
+    /* Input Modes */
+    ttyopt.c_iflag |= IGNPAR;  /* ignore bytes with parity errors */
+    ttyopt.c_iflag &= ~ICRNL;  /* do not map CR to NL on input*/
+    ttyopt.c_iflag &= ~IGNCR;  /* do not ignore carriage return on input */
+    ttyopt.c_iflag &= ~IXON;   /* disable Start/Stop output control */
+    ttyopt.c_iflag &= ~IXOFF;  /* do not send Start/Stop characters */
+    /* Output Modes */
+    ttyopt.c_oflag = 0;        /* disable everything on output as we only write binary */
+    /* Local Modes */
+    ttyopt.c_lflag &= ~ICANON; /* disable canonical input - cannot use with binary input */
+    ttyopt.c_lflag &= ~ISIG;   /* disable check for INTR, QUIT, SUSP special characters */
+    ttyopt.c_lflag &= ~IEXTEN; /* disable any special control character */
+    ttyopt.c_lflag &= ~ECHO;   /* do not echo back every character typed */
+    ttyopt.c_lflag &= ~ECHOE;  /* does not erase the last character in current line */
+    ttyopt.c_lflag &= ~ECHOK;  /* do not echo NL after KILL character */
+
+    /* settings for non-canonical mode
+       read will block for until the lesser of VMIN or requested chars have been received */
+    ttyopt.c_cc[VMIN]  = LGW_GPS_MIN_MSG_SIZE;
+    ttyopt.c_cc[VTIME] = 0;
+
+    /* set new serial ports parameters */
+    i = tcsetattr(gps_tty_dev, TCSANOW, &ttyopt);
+    if (i != 0){
+        DEBUG_MSG("ERROR: IMPOSSIBLE TO UPDATE TTY PORT CONFIGURATION\n");
+        return LGW_GPS_ERROR;
+    }
+    tcflush(gps_tty_dev, TCIOFLUSH);
+
+    /* Send UBX CFG NAV-TIMEGPS message to tell GPS module to output native GPS time */
+    /* This is a binary message, serial port has to be properly configured to handle this */
+    num_written = write (gps_tty_dev, ubx_cmd_timegps, UBX_MSG_NAVTIMEGPS_LEN);
+    if (num_written != UBX_MSG_NAVTIMEGPS_LEN) {
+        DEBUG_MSG("ERROR: Failed to write on serial port (written=%d)\n", (int) num_written);
+    }
+
+    /* get timezone info */
+    tzset();
+
+    /* initialize global variables */
+    gps_time_ok = false;
+    gps_pos_ok = false;
+    gps_mod = 'N';
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_gps_disable(int fd) {
+    int i;
+
+    /* restore serial ports parameters */
+    i = tcsetattr(fd, TCSANOW, &ttyopt_restore);
+    if (i != 0){
+        DEBUG_MSG("ERROR: IMPOSSIBLE TO RESTORE TTY PORT CONFIGURATION\n");
+        return LGW_GPS_ERROR;
+    }
+    tcflush(fd, TCIOFLUSH);
+
+    i = close(fd);
+    if (i <= 0) {
+        DEBUG_MSG("ERROR: TTY PORT FAIL TO CLOSE\n");
+        return LGW_GPS_ERROR;
+    }
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+enum gps_msg lgw_parse_ubx(const char *serial_buff, size_t buff_size, size_t *msg_size) {
+    bool valid = 0;    /* iTOW, fTOW and week validity */
+    unsigned int payload_length;
+    uint8_t ck_a, ck_b;
+    uint8_t ck_a_rcv, ck_b_rcv;
+    unsigned int i;
+
+    *msg_size = 0; /* ensure msg_size alway receives a value */
+
+    /* check input parameters */
+    if (serial_buff == NULL) {
+        return IGNORED;
+    }
+    if (buff_size < 8) {
+        DEBUG_MSG("ERROR: TOO SHORT TO BE A VALID UBX MESSAGE\n");
+        return IGNORED;
+    }
+
+    /* display received serial data and checksum */
+    DEBUG_MSG("Note: parsing UBX frame> ");
+    for (i=0; i<buff_size; i++) {
+        DEBUG_MSG("%02x ", serial_buff[i]);
+    }
+    DEBUG_MSG("\n");
+
+    /* Check for UBX sync chars 0xB5 0x62 */
+    if ((serial_buff[0] == (char)0xB5) && (serial_buff[1] == (char)0x62)) {
+
+        /* Get payload length to compute message size */
+        payload_length  = (uint8_t)serial_buff[4];
+        payload_length |= (uint8_t)serial_buff[5] << 8;
+        *msg_size = 6 + payload_length + 2; /* header + payload + checksum */
+
+        /* check for complete message in buffer */
+        if(*msg_size <= buff_size) {
+            /* Validate checksum of message */
+            ck_a_rcv = serial_buff[*msg_size-2]; /* received checksum */
+            ck_b_rcv = serial_buff[*msg_size-1]; /* received checksum */
+            /* Use 8-bit Fletcher Algorithm to compute checksum of actual payload */
+            ck_a = 0; ck_b = 0;
+            for (i=0; i<(4 + payload_length); i++) {
+                ck_a = ck_a + serial_buff[i+2];
+                ck_b = ck_b + ck_a;
+            }
+
+            /* Compare checksums and parse if OK */
+            if ((ck_a == ck_a_rcv) && (ck_b == ck_b_rcv)) {
+                /* Check for Class 0x01 (NAV) and ID 0x20 (NAV-TIMEGPS) */
+                if ((serial_buff[2] == 0x01) && (serial_buff[3] == 0x20)) {
+                    /* Check validity of information */
+                    valid = serial_buff[17] & 0x3; /* towValid, weekValid */
+                    if (valid) {
+                        /* Parse buffer to extract GPS time */
+                        /* Warning: payload byte ordering is Little Endian */
+                        gps_iTOW =  (uint8_t)serial_buff[6];
+                        gps_iTOW |= (uint8_t)serial_buff[7] << 8;
+                        gps_iTOW |= (uint8_t)serial_buff[8] << 16;
+                        gps_iTOW |= (uint8_t)serial_buff[9] << 24; /* GPS time of week, in ms */
+
+                        gps_fTOW =  (uint8_t)serial_buff[10];
+                        gps_fTOW |= (uint8_t)serial_buff[11] << 8;
+                        gps_fTOW |= (uint8_t)serial_buff[12] << 16;
+                        gps_fTOW |= (uint8_t)serial_buff[13] << 24; /* Fractional part of iTOW, in ns */
+
+                        gps_week =  (uint8_t)serial_buff[14];
+                        gps_week |= (uint8_t)serial_buff[15] << 8; /* GPS week number */
+
+                        gps_time_ok = true;
+#if 0
+                        /* For debug */
+                        {
+                            short ubx_gps_hou = 0; /* hours (0-23) */
+                            short ubx_gps_min = 0; /* minutes (0-59) */
+                            short ubx_gps_sec = 0; /* seconds (0-59) */
+
+                            /* Format GPS time in hh:mm:ss based on iTOW */
+                            ubx_gps_sec = (gps_iTOW / 1000) % 60;
+                            ubx_gps_min = (gps_iTOW / 1000 / 60) % 60;
+                            ubx_gps_hou = (gps_iTOW / 1000 / 60 / 60) % 24;
+                            printf("  GPS time = %02d:%02d:%02d\n", ubx_gps_hou, ubx_gps_min, ubx_gps_sec);
+                        }
+#endif
+                    } else { /* valid */
+                        gps_time_ok = false;
+                    }
+
+                    return UBX_NAV_TIMEGPS;
+                } else if ((serial_buff[2] == 0x05) && (serial_buff[3] == 0x00)) {
+                    DEBUG_MSG("NOTE: UBX ACK-NAK received\n");
+                    return IGNORED;
+                } else if ((serial_buff[2] == 0x05) && (serial_buff[3] == 0x01)) {
+                    DEBUG_MSG("NOTE: UBX ACK-ACK received\n");
+                    return IGNORED;
+                } else { /* not a supported message */
+                    DEBUG_MSG("ERROR: UBX message is not supported (%02x %02x)\n", serial_buff[2], serial_buff[3]);
+                    return IGNORED;
+                }
+            } else { /* checksum failed */
+                DEBUG_MSG("ERROR: UBX message is corrupted, checksum failed\n");
+                return INVALID;
+            }
+        } else { /* message contains less bytes than indicated by header */
+            DEBUG_MSG("ERROR: UBX message incomplete\n");
+            return INCOMPLETE;
+        }
+    } else { /* Not a UBX message */
+        /* Ignore messages which are not UBX ones for now */
+        return IGNORED;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+enum gps_msg lgw_parse_nmea(const char *serial_buff, int buff_size) {
+    int i, j, k;
+    int str_index[30]; /* string index from the string chopping */
+    int nb_fields; /* number of strings detected by string chopping */
+    char parser_buf[256]; /* parsing modifies buffer so need a local copy */
+
+    /* check input parameters */
+    if (serial_buff == NULL) {
+        return UNKNOWN;
+    }
+
+    if(buff_size > (int)(sizeof(parser_buf) - 1)) {
+        DEBUG_MSG("Note: input string to big for parsing\n");
+        return INVALID;
+    }
+
+    /* look for some NMEA sentences in particular */
+    if (buff_size < 8) {
+        DEBUG_MSG("ERROR: TOO SHORT TO BE A VALID NMEA SENTENCE\n");
+        return UNKNOWN;
+    } else if (!validate_nmea_checksum(serial_buff, buff_size)) {
+        DEBUG_MSG("Warning: invalid NMEA sentence (bad checksum)\n");
+        return INVALID;
+    } else if (match_label(serial_buff, "$G?RMC", 6, '?')) {
+        /*
+        NMEA sentence format: $xxRMC,time,status,lat,NS,long,EW,spd,cog,date,mv,mvEW,posMode*cs<CR><LF>
+        Valid fix: $GPRMC,083559.34,A,4717.11437,N,00833.91522,E,0.004,77.52,091202,,,A*00
+        No fix: $GPRMC,,V,,,,,,,,,,N*00
+        */
+        memcpy(parser_buf, serial_buff, buff_size);
+        parser_buf[buff_size] = '\0';
+        nb_fields = str_chop(parser_buf, buff_size, ',', str_index, ARRAY_SIZE(str_index));
+        if (nb_fields != 13) {
+            DEBUG_MSG("Warning: invalid RMC sentence (number of fields)\n");
+            return IGNORED;
+        }
+        /* parse GPS status */
+        gps_mod = *(parser_buf + str_index[12]); /* get first character, no need to bother with sscanf */
+        if ((gps_mod != 'N') && (gps_mod != 'A') && (gps_mod != 'D')) {
+            gps_mod = 'N';
+        }
+        /* parse complete time */
+        i = sscanf(parser_buf + str_index[1], "%2hd%2hd%2hd%4f", &gps_hou, &gps_min, &gps_sec, &gps_fra);
+        j = sscanf(parser_buf + str_index[9], "%2hd%2hd%2hd", &gps_day, &gps_mon, &gps_yea);
+        if ((i == 4) && (j == 3)) {
+            if ((gps_mod == 'A') || (gps_mod == 'D')) {
+                gps_time_ok = true;
+                DEBUG_MSG("Note: Valid RMC sentence, GPS locked, date: 20%02d-%02d-%02dT%02d:%02d:%06.3fZ\n", gps_yea, gps_mon, gps_day, gps_hou, gps_min, gps_fra + (float)gps_sec);
+            } else {
+                gps_time_ok = false;
+                DEBUG_MSG("Note: Valid RMC sentence, no satellite fix, estimated date: 20%02d-%02d-%02dT%02d:%02d:%06.3fZ\n", gps_yea, gps_mon, gps_day, gps_hou, gps_min, gps_fra + (float)gps_sec);
+            }
+        } else {
+            /* could not get a valid hour AND date */
+            gps_time_ok = false;
+            DEBUG_MSG("Note: Valid RMC sentence, mode %c, no date\n", gps_mod);
+        }
+        return NMEA_RMC;
+    } else if (match_label(serial_buff, "$G?GGA", 6, '?')) {
+        /*
+        NMEA sentence format: $xxGGA,time,lat,NS,long,EW,quality,numSV,HDOP,alt,M,sep,M,diffAge,diffStation*cs<CR><LF>
+        Valid fix: $GPGGA,092725.00,4717.11399,N,00833.91590,E,1,08,1.01,499.6,M,48.0,M,,*5B
+        */
+        memcpy(parser_buf, serial_buff, buff_size);
+        parser_buf[buff_size] = '\0';
+        nb_fields = str_chop(parser_buf, buff_size, ',', str_index, ARRAY_SIZE(str_index));
+        if (nb_fields != 15) {
+            DEBUG_MSG("Warning: invalid GGA sentence (number of fields)\n");
+            return IGNORED;
+        }
+        /* parse number of satellites used for fix */
+        sscanf(parser_buf + str_index[7], "%hd", &gps_sat);
+        /* parse 3D coordinates */
+        i = sscanf(parser_buf + str_index[2], "%2hd%10lf", &gps_dla, &gps_mla);
+        gps_ola = *(parser_buf + str_index[3]);
+        j = sscanf(parser_buf + str_index[4], "%3hd%10lf", &gps_dlo, &gps_mlo);
+        gps_olo = *(parser_buf + str_index[5]);
+        k = sscanf(parser_buf + str_index[9], "%hd", &gps_alt);
+        if ((i == 2) && (j == 2) && (k == 1) && ((gps_ola=='N')||(gps_ola=='S')) && ((gps_olo=='E')||(gps_olo=='W'))) {
+            gps_pos_ok = true;
+            DEBUG_MSG("Note: Valid GGA sentence, %d sat, lat %02ddeg %06.3fmin %c, lon %03ddeg%06.3fmin %c, alt %d\n", gps_sat, gps_dla, gps_mla, gps_ola, gps_dlo, gps_mlo, gps_olo, gps_alt);
+        } else {
+            /* could not get a valid latitude, longitude AND altitude */
+            gps_pos_ok = false;
+            DEBUG_MSG("Note: Valid GGA sentence, %d sat, no coordinates\n", gps_sat);
+        }
+        return NMEA_GGA;
+    } else {
+        DEBUG_MSG("Note: ignored NMEA sentence\n"); /* quite verbose */
+        return IGNORED;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_gps_get(struct timespec *utc, struct timespec *gps_time, struct coord_s *loc, struct coord_s *err) {
+    struct tm x;
+    time_t y;
+    double intpart, fractpart;
+
+    if (utc != NULL) {
+        if (!gps_time_ok) {
+            DEBUG_MSG("ERROR: NO VALID TIME TO RETURN\n");
+            return LGW_GPS_ERROR;
+        }
+        memset(&x, 0, sizeof(x));
+        if (gps_yea < 100) { /* 2-digits year, 20xx */
+            x.tm_year = gps_yea + 100; /* 100 years offset to 1900 */
+        } else { /* 4-digits year, Gregorian calendar */
+            x.tm_year = gps_yea - 1900;
+        }
+        x.tm_mon = gps_mon - 1; /* tm_mon is [0,11], gps_mon is [1,12] */
+        x.tm_mday = gps_day;
+        x.tm_hour = gps_hou;
+        x.tm_min = gps_min;
+        x.tm_sec = gps_sec;
+        y = mktime(&x) - timezone; /* need to substract timezone bc mktime assumes time vector is local time */
+        if (y == (time_t)(-1)) {
+            DEBUG_MSG("ERROR: FAILED TO CONVERT BROKEN-DOWN TIME\n");
+            return LGW_GPS_ERROR;
+        }
+        utc->tv_sec = y;
+        utc->tv_nsec = (int32_t)(gps_fra * 1e9);
+    }
+    if (gps_time != NULL) {
+        if (!gps_time_ok) {
+            DEBUG_MSG("ERROR: NO VALID TIME TO RETURN\n");
+            return LGW_GPS_ERROR;
+        }
+        fractpart = modf(((double)gps_iTOW / 1E3) + ((double)gps_fTOW / 1E9), &intpart);
+        /* Number of seconds since beginning on current GPS week */
+        gps_time->tv_sec = (time_t)intpart;
+        /* Number of seconds since GPS epoch 06.Jan.1980 */
+        gps_time->tv_sec += (time_t)gps_week * 604800; /* day*hours*minutes*secondes: 7*24*60*60; */
+        /* Fractional part in nanoseconds */
+        gps_time->tv_nsec = (long)(fractpart * 1E9);
+    }
+    if (loc != NULL) {
+        if (!gps_pos_ok) {
+            DEBUG_MSG("ERROR: NO VALID POSITION TO RETURN\n");
+            return LGW_GPS_ERROR;
+        }
+        loc->lat = ((double)gps_dla + (gps_mla/60.0)) * ((gps_ola == 'N')?1.0:-1.0);
+        loc->lon = ((double)gps_dlo + (gps_mlo/60.0)) * ((gps_olo == 'E')?1.0:-1.0);
+        loc->alt = gps_alt;
+    }
+    if (err != NULL) {
+        DEBUG_MSG("Warning: localization error processing not implemented yet\n");
+        err->lat = 0.0;
+        err->lon = 0.0;
+        err->alt = 0;
+    }
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_gps_sync(struct tref *ref, uint32_t count_us, struct timespec utc, struct timespec gps_time) {
+    double cnt_diff; /* internal concentrator time difference (in seconds) */
+    double utc_diff; /* UTC time difference (in seconds) */
+    double slope; /* time slope between new reference and old reference (for sanity check) */
+
+    bool aber_n0; /* is the update value for synchronization aberrant or not ? */
+    static bool aber_min1 = false; /* keep track of whether value at sync N-1 was aberrant or not  */
+    static bool aber_min2 = false; /* keep track of whether value at sync N-2 was aberrant or not  */
+
+    CHECK_NULL(ref);
+
+    /* calculate the slope */
+
+    cnt_diff = (double)(count_us - ref->count_us) / (double)(TS_CPS); /* uncorrected by xtal_err */
+    utc_diff = (double)(utc.tv_sec - (ref->utc).tv_sec) + (1E-9 * (double)(utc.tv_nsec - (ref->utc).tv_nsec));
+
+    /* detect aberrant points by measuring if slope limits are exceeded */
+    if (utc_diff != 0) { // prevent divide by zero
+        slope = cnt_diff/utc_diff;
+        if ((slope > PLUS_10PPM) || (slope < MINUS_10PPM)) {
+            DEBUG_MSG("Warning: correction range exceeded\n");
+            aber_n0 = true;
+        } else {
+            aber_n0 = false;
+        }
+    } else {
+        DEBUG_MSG("Warning: aberrant UTC value for synchronization\n");
+        aber_n0 = true;
+    }
+
+    /* watch if the 3 latest sync point were aberrant or not */
+    if (aber_n0 == false) {
+        /* value no aberrant -> sync with smoothed slope */
+        ref->systime = time(NULL);
+        ref->count_us = count_us;
+        ref->utc.tv_sec = utc.tv_sec;
+        ref->utc.tv_nsec = utc.tv_nsec;
+        ref->gps.tv_sec = gps_time.tv_sec;
+        ref->gps.tv_nsec = gps_time.tv_nsec;
+        ref->xtal_err = slope;
+        aber_min2 = aber_min1;
+        aber_min1 = aber_n0;
+        return LGW_GPS_SUCCESS;
+    } else if (aber_n0 && aber_min1 && aber_min2) {
+        /* 3 successive aberrant values -> sync reset (keep xtal_err) */
+        ref->systime = time(NULL);
+        ref->count_us = count_us;
+        ref->utc.tv_sec = utc.tv_sec;
+        ref->utc.tv_nsec = utc.tv_nsec;
+        ref->gps.tv_sec = gps_time.tv_sec;
+        ref->gps.tv_nsec = gps_time.tv_nsec;
+        /* reset xtal_err only if the present value is out of range */
+        if ((ref->xtal_err > PLUS_10PPM) || (ref->xtal_err < MINUS_10PPM)) {
+            ref->xtal_err = 1.0;
+        }
+        DEBUG_MSG("Warning: 3 successive aberrant sync attempts, sync reset\n");
+        aber_min2 = aber_min1;
+        aber_min1 = aber_n0;
+        return LGW_GPS_SUCCESS;
+    } else {
+        /* only 1 or 2 successive aberrant values -> ignore and return an error */
+        aber_min2 = aber_min1;
+        aber_min1 = aber_n0;
+        return LGW_GPS_ERROR;
+    }
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_cnt2utc(struct tref ref, uint32_t count_us, struct timespec *utc) {
+    double delta_sec;
+    double intpart, fractpart;
+    long tmp;
+
+    CHECK_NULL(utc);
+    if ((ref.systime == 0) || (ref.xtal_err > PLUS_10PPM) || (ref.xtal_err < MINUS_10PPM)) {
+        DEBUG_MSG("ERROR: INVALID REFERENCE FOR CNT -> UTC CONVERSION\n");
+        return LGW_GPS_ERROR;
+    }
+
+    /* calculate delta in seconds between reference count_us and target count_us */
+    delta_sec = (double)(count_us - ref.count_us) / (TS_CPS * ref.xtal_err);
+
+    /* now add that delta to reference UTC time */
+    fractpart = modf (delta_sec , &intpart);
+    tmp = ref.utc.tv_nsec + (long)(fractpart * 1E9);
+    if (tmp < (long)1E9) { /* the nanosecond part doesn't overflow */
+        utc->tv_sec = ref.utc.tv_sec + (time_t)intpart;
+        utc->tv_nsec = tmp;
+    } else { /* must carry one second */
+        utc->tv_sec = ref.utc.tv_sec + (time_t)intpart + 1;
+        utc->tv_nsec = tmp - (long)1E9;
+    }
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_utc2cnt(struct tref ref, struct timespec utc, uint32_t *count_us) {
+    double delta_sec;
+
+    CHECK_NULL(count_us);
+    if ((ref.systime == 0) || (ref.xtal_err > PLUS_10PPM) || (ref.xtal_err < MINUS_10PPM)) {
+        DEBUG_MSG("ERROR: INVALID REFERENCE FOR UTC -> CNT CONVERSION\n");
+        return LGW_GPS_ERROR;
+    }
+
+    /* calculate delta in seconds between reference utc and target utc */
+    delta_sec = (double)(utc.tv_sec - ref.utc.tv_sec);
+    delta_sec += 1E-9 * (double)(utc.tv_nsec - ref.utc.tv_nsec);
+
+    /* now convert that to internal counter tics and add that to reference counter value */
+    *count_us = ref.count_us + (uint32_t)(delta_sec * TS_CPS * ref.xtal_err);
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_cnt2gps(struct tref ref, uint32_t count_us, struct timespec *gps_time) {
+    double delta_sec;
+    double intpart, fractpart;
+    long tmp;
+
+    CHECK_NULL(gps_time);
+    if ((ref.systime == 0) || (ref.xtal_err > PLUS_10PPM) || (ref.xtal_err < MINUS_10PPM)) {
+        DEBUG_MSG("ERROR: INVALID REFERENCE FOR CNT -> GPS CONVERSION\n");
+        return LGW_GPS_ERROR;
+    }
+
+    /* calculate delta in milliseconds between reference count_us and target count_us */
+    delta_sec = (double)(count_us - ref.count_us) / (TS_CPS * ref.xtal_err);
+
+    /* now add that delta to reference GPS time */
+    fractpart = modf (delta_sec , &intpart);
+    tmp = ref.gps.tv_nsec + (long)(fractpart * 1E9);
+    if (tmp < (long)1E9) { /* the nanosecond part doesn't overflow */
+        gps_time->tv_sec = ref.gps.tv_sec + (time_t)intpart;
+        gps_time->tv_nsec = tmp;
+    } else { /* must carry one second */
+        gps_time->tv_sec = ref.gps.tv_sec + (time_t)intpart + 1;
+        gps_time->tv_nsec = tmp - (long)1E9;
+    }
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_gps2cnt(struct tref ref, struct timespec gps_time, uint32_t *count_us) {
+    double delta_sec;
+
+    CHECK_NULL(count_us);
+    if ((ref.systime == 0) || (ref.xtal_err > PLUS_10PPM) || (ref.xtal_err < MINUS_10PPM)) {
+        DEBUG_MSG("ERROR: INVALID REFERENCE FOR GPS -> CNT CONVERSION\n");
+        return LGW_GPS_ERROR;
+    }
+
+    /* calculate delta in seconds between reference gps time and target gps time */
+    delta_sec = (double)(gps_time.tv_sec - ref.gps.tv_sec);
+    delta_sec += 1E-9 * (double)(gps_time.tv_nsec - ref.gps.tv_nsec);
+
+    /* now convert that to internal counter tics and add that to reference counter value */
+    *count_us = ref.count_us + (uint32_t)(delta_sec * TS_CPS * ref.xtal_err);
+
+    return LGW_GPS_SUCCESS;
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_hal.c b/libloragw/src/loragw_hal.c
new file mode 100644
index 0000000..8103751
--- /dev/null
+++ b/libloragw/src/loragw_hal.c
@@ -0,0 +1,1767 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    LoRa concentrator Hardware Abstraction Layer
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Sylvain Miermont
+*/
+
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+#include <string.h>     /* memcpy */
+#include <math.h>       /* pow, cell */
+
+#include "loragw_reg.h"
+#include "loragw_hal.h"
+#include "loragw_aux.h"
+#include "loragw_spi.h"
+#include "loragw_radio.h"
+#include "loragw_fpga.h"
+#include "loragw_lbt.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_HAL == 1
+    #define DEBUG_MSG(str)                fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)    fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define DEBUG_ARRAY(a,b,c)            for(a=0;a<b;++a) fprintf(stderr,"%x.",c[a]);fprintf(stderr,"end\n")
+    #define CHECK_NULL(a)                 if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_HAL_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define DEBUG_ARRAY(a,b,c)            for(a=0;a!=0;){}
+    #define CHECK_NULL(a)                 if(a==NULL){return LGW_HAL_ERROR;}
+#endif
+
+#define IF_HZ_TO_REG(f)     (f << 5)/15625
+#define SET_PPM_ON(bw,dr)   (((bw == BW_125KHZ) && ((dr == DR_LORA_SF11) || (dr == DR_LORA_SF12))) || ((bw == BW_250KHZ) && (dr == DR_LORA_SF12)))
+#define TRACE()             fprintf(stderr, "@ %s %d\n", __FUNCTION__, __LINE__);
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS & TYPES -------------------------------------------- */
+
+#define MCU_ARB             0
+#define MCU_AGC             1
+#define MCU_ARB_FW_BYTE     8192 /* size of the firmware IN BYTES (= twice the number of 14b words) */
+#define MCU_AGC_FW_BYTE     8192 /* size of the firmware IN BYTES (= twice the number of 14b words) */
+#define FW_VERSION_ADDR     0x20 /* Address of firmware version in data memory */
+#define FW_VERSION_CAL      2 /* Expected version of calibration firmware */
+#define FW_VERSION_AGC      4 /* Expected version of AGC firmware */
+#define FW_VERSION_ARB      1 /* Expected version of arbiter firmware */
+
+#define TX_METADATA_NB      16
+#define RX_METADATA_NB      16
+
+#define AGC_CMD_WAIT        16
+#define AGC_CMD_ABORT       17
+
+#define MIN_LORA_PREAMBLE   6
+#define STD_LORA_PREAMBLE   8
+#define MIN_FSK_PREAMBLE    3
+#define STD_FSK_PREAMBLE    5
+
+#define RSSI_MULTI_BIAS     -35 /* difference between "multi" modem RSSI offset and "stand-alone" modem RSSI offset */
+#define RSSI_FSK_POLY_0     60 /* polynomiam coefficients to linearize FSK RSSI */
+#define RSSI_FSK_POLY_1     1.5351
+#define RSSI_FSK_POLY_2     0.003
+
+/* Useful bandwidth of SX125x radios to consider depending on channel bandwidth */
+/* Note: the below values come from lab measurements. For any question, please contact Semtech support */
+#define LGW_RF_RX_BANDWIDTH_125KHZ  925000      /* for 125KHz channels */
+#define LGW_RF_RX_BANDWIDTH_250KHZ  1000000     /* for 250KHz channels */
+#define LGW_RF_RX_BANDWIDTH_500KHZ  1100000     /* for 500KHz channels */
+
+#define TX_START_DELAY_DEFAULT  1497 /* Calibrated value for 500KHz BW and notch filter disabled */
+
+/* constant arrays defining hardware capability */
+const uint8_t ifmod_config[LGW_IF_CHAIN_NB] = LGW_IFMODEM_CONFIG;
+
+/* Version string, used to identify the library version/options once compiled */
+const char lgw_version_string[] = "Version: " LIBLORAGW_VERSION ";";
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+#include "arb_fw.var" /* external definition of the variable */
+#include "agc_fw.var" /* external definition of the variable */
+#include "cal_fw.var" /* external definition of the variable */
+
+/*
+The following static variables are the configuration set that the user can
+modify using rxrf_setconf, rxif_setconf and txgain_setconf functions.
+The functions _start and _send then use that set to configure the hardware.
+
+Parameters validity and coherency is verified by the _setconf functions and
+the _start and _send functions assume they are valid.
+*/
+
+static bool lgw_is_started;
+
+static bool rf_enable[LGW_RF_CHAIN_NB];
+static uint32_t rf_rx_freq[LGW_RF_CHAIN_NB]; /* absolute, in Hz */
+static float rf_rssi_offset[LGW_RF_CHAIN_NB];
+static bool rf_tx_enable[LGW_RF_CHAIN_NB];
+static uint32_t rf_tx_notch_freq[LGW_RF_CHAIN_NB];
+static enum lgw_radio_type_e rf_radio_type[LGW_RF_CHAIN_NB];
+
+static bool if_enable[LGW_IF_CHAIN_NB];
+static bool if_rf_chain[LGW_IF_CHAIN_NB]; /* for each IF, 0 -> radio A, 1 -> radio B */
+static int32_t if_freq[LGW_IF_CHAIN_NB]; /* relative to radio frequency, +/- in Hz */
+
+static uint8_t lora_multi_sfmask[LGW_MULTI_NB]; /* enables SF for LoRa 'multi' modems */
+
+static uint8_t lora_rx_bw; /* bandwidth setting for LoRa standalone modem */
+static uint8_t lora_rx_sf; /* spreading factor setting for LoRa standalone modem */
+static bool lora_rx_ppm_offset;
+
+static uint8_t fsk_rx_bw; /* bandwidth setting of FSK modem */
+static uint32_t fsk_rx_dr; /* FSK modem datarate in bauds */
+static uint8_t fsk_sync_word_size = 3; /* default number of bytes for FSK sync word */
+static uint64_t fsk_sync_word= 0xC194C1; /* default FSK sync word (ALIGNED RIGHT, MSbit first) */
+
+static bool lorawan_public = false;
+static uint8_t rf_clkout = 0;
+
+static struct lgw_tx_gain_lut_s txgain_lut = {
+    .size = 2,
+    .lut[0] = {
+        .dig_gain = 0,
+        .pa_gain = 2,
+        .dac_gain = 3,
+        .mix_gain = 10,
+        .rf_power = 14
+    },
+    .lut[1] = {
+        .dig_gain = 0,
+        .pa_gain = 3,
+        .dac_gain = 3,
+        .mix_gain = 14,
+        .rf_power = 27
+    }};
+
+/* TX I/Q imbalance coefficients for mixer gain = 8 to 15 */
+static int8_t cal_offset_a_i[8]; /* TX I offset for radio A */
+static int8_t cal_offset_a_q[8]; /* TX Q offset for radio A */
+static int8_t cal_offset_b_i[8]; /* TX I offset for radio B */
+static int8_t cal_offset_b_q[8]; /* TX Q offset for radio B */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DECLARATION ---------------------------------------- */
+
+int load_firmware(uint8_t target, uint8_t *firmware, uint16_t size);
+
+void lgw_constant_adjust(void);
+
+int32_t lgw_sf_getval(int x);
+int32_t lgw_bw_getval(int x);
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
+
+/* size is the firmware size in bytes (not 14b words) */
+int load_firmware(uint8_t target, uint8_t *firmware, uint16_t size) {
+    int reg_rst;
+    int reg_sel;
+    uint8_t fw_check[8192];
+    int32_t dummy;
+
+    /* check parameters */
+    CHECK_NULL(firmware);
+    if (target == MCU_ARB) {
+        if (size != MCU_ARB_FW_BYTE) {
+            DEBUG_MSG("ERROR: NOT A VALID SIZE FOR MCU ARG FIRMWARE\n");
+            return -1;
+        }
+        reg_rst = LGW_MCU_RST_0;
+        reg_sel = LGW_MCU_SELECT_MUX_0;
+    }else if (target == MCU_AGC) {
+        if (size != MCU_AGC_FW_BYTE) {
+            DEBUG_MSG("ERROR: NOT A VALID SIZE FOR MCU AGC FIRMWARE\n");
+            return -1;
+        }
+        reg_rst = LGW_MCU_RST_1;
+        reg_sel = LGW_MCU_SELECT_MUX_1;
+    } else {
+        DEBUG_MSG("ERROR: NOT A VALID TARGET FOR LOADING FIRMWARE\n");
+        return -1;
+    }
+
+    /* reset the targeted MCU */
+    lgw_reg_w(reg_rst, 1);
+
+    /* set mux to access MCU program RAM and set address to 0 */
+    lgw_reg_w(reg_sel, 0);
+    lgw_reg_w(LGW_MCU_PROM_ADDR, 0);
+
+    /* write the program in one burst */
+    lgw_reg_wb(LGW_MCU_PROM_DATA, firmware, size);
+
+    /* Read back firmware code for check */
+    lgw_reg_r( LGW_MCU_PROM_DATA, &dummy ); /* bug workaround */
+    lgw_reg_rb( LGW_MCU_PROM_DATA, fw_check, size );
+    if (memcmp(firmware, fw_check, size) != 0) {
+        printf ("ERROR: Failed to load fw %d\n", (int)target);
+        return -1;
+    }
+
+    /* give back control of the MCU program ram to the MCU */
+    lgw_reg_w(reg_sel, 1);
+
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void lgw_constant_adjust(void) {
+
+    /* I/Q path setup */
+    // lgw_reg_w(LGW_RX_INVERT_IQ,0); /* default 0 */
+    // lgw_reg_w(LGW_MODEM_INVERT_IQ,1); /* default 1 */
+    // lgw_reg_w(LGW_CHIRP_INVERT_RX,1); /* default 1 */
+    // lgw_reg_w(LGW_RX_EDGE_SELECT,0); /* default 0 */
+    // lgw_reg_w(LGW_MBWSSF_MODEM_INVERT_IQ,0); /* default 0 */
+    // lgw_reg_w(LGW_DC_NOTCH_EN,1); /* default 1 */
+    lgw_reg_w(LGW_RSSI_BB_FILTER_ALPHA,6); /* default 7 */
+    lgw_reg_w(LGW_RSSI_DEC_FILTER_ALPHA,7); /* default 5 */
+    lgw_reg_w(LGW_RSSI_CHANN_FILTER_ALPHA,7); /* default 8 */
+    lgw_reg_w(LGW_RSSI_BB_DEFAULT_VALUE,23); /* default 32 */
+    lgw_reg_w(LGW_RSSI_CHANN_DEFAULT_VALUE,85); /* default 100 */
+    lgw_reg_w(LGW_RSSI_DEC_DEFAULT_VALUE,66); /* default 100 */
+    lgw_reg_w(LGW_DEC_GAIN_OFFSET,7); /* default 8 */
+    lgw_reg_w(LGW_CHAN_GAIN_OFFSET,6); /* default 7 */
+
+    /* Correlator setup */
+    // lgw_reg_w(LGW_CORR_DETECT_EN,126); /* default 126 */
+    // lgw_reg_w(LGW_CORR_NUM_SAME_PEAK,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_MAC_GAIN,5); /* default 5 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF6,0); /* default 0 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF7,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF8,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF9,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF10,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF11,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SAME_PEAKS_OPTION_SF12,1); /* default 1 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF6,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF7,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF8,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF9,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF10,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF11,4); /* default 4 */
+    // lgw_reg_w(LGW_CORR_SIG_NOISE_RATIO_SF12,4); /* default 4 */
+
+    /* LoRa 'multi' demodulators setup */
+    // lgw_reg_w(LGW_PREAMBLE_SYMB1_NB,10); /* default 10 */
+    // lgw_reg_w(LGW_FREQ_TO_TIME_INVERT,29); /* default 29 */
+    // lgw_reg_w(LGW_FRAME_SYNCH_GAIN,1); /* default 1 */
+    // lgw_reg_w(LGW_SYNCH_DETECT_TH,1); /* default 1 */
+    // lgw_reg_w(LGW_ZERO_PAD,0); /* default 0 */
+    lgw_reg_w(LGW_SNR_AVG_CST,3); /* default 2 */
+    if (lorawan_public) { /* LoRa network */
+        lgw_reg_w(LGW_FRAME_SYNCH_PEAK1_POS,3); /* default 1 */
+        lgw_reg_w(LGW_FRAME_SYNCH_PEAK2_POS,4); /* default 2 */
+    } else { /* private network */
+        lgw_reg_w(LGW_FRAME_SYNCH_PEAK1_POS,1); /* default 1 */
+        lgw_reg_w(LGW_FRAME_SYNCH_PEAK2_POS,2); /* default 2 */
+    }
+
+    // lgw_reg_w(LGW_PREAMBLE_FINE_TIMING_GAIN,1); /* default 1 */
+    // lgw_reg_w(LGW_ONLY_CRC_EN,1); /* default 1 */
+    // lgw_reg_w(LGW_PAYLOAD_FINE_TIMING_GAIN,2); /* default 2 */
+    // lgw_reg_w(LGW_TRACKING_INTEGRAL,0); /* default 0 */
+    // lgw_reg_w(LGW_ADJUST_MODEM_START_OFFSET_RDX8,0); /* default 0 */
+    // lgw_reg_w(LGW_ADJUST_MODEM_START_OFFSET_SF12_RDX4,4092); /* default 4092 */
+    // lgw_reg_w(LGW_MAX_PAYLOAD_LEN,255); /* default 255 */
+
+    /* LoRa standalone 'MBWSSF' demodulator setup */
+    // lgw_reg_w(LGW_MBWSSF_PREAMBLE_SYMB1_NB,10); /* default 10 */
+    // lgw_reg_w(LGW_MBWSSF_FREQ_TO_TIME_INVERT,29); /* default 29 */
+    // lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_GAIN,1); /* default 1 */
+    // lgw_reg_w(LGW_MBWSSF_SYNCH_DETECT_TH,1); /* default 1 */
+    // lgw_reg_w(LGW_MBWSSF_ZERO_PAD,0); /* default 0 */
+    if (lorawan_public) { /* LoRa network */
+        lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_PEAK1_POS,3); /* default 1 */
+        lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_PEAK2_POS,4); /* default 2 */
+    } else {
+        lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_PEAK1_POS,1); /* default 1 */
+        lgw_reg_w(LGW_MBWSSF_FRAME_SYNCH_PEAK2_POS,2); /* default 2 */
+    }
+    // lgw_reg_w(LGW_MBWSSF_ONLY_CRC_EN,1); /* default 1 */
+    // lgw_reg_w(LGW_MBWSSF_PAYLOAD_FINE_TIMING_GAIN,2); /* default 2 */
+    // lgw_reg_w(LGW_MBWSSF_PREAMBLE_FINE_TIMING_GAIN,1); /* default 1 */
+    // lgw_reg_w(LGW_MBWSSF_TRACKING_INTEGRAL,0); /* default 0 */
+    // lgw_reg_w(LGW_MBWSSF_AGC_FREEZE_ON_DETECT,1); /* default 1 */
+
+    /* Improvement of reference clock frequency error tolerance */
+    lgw_reg_w(LGW_ADJUST_MODEM_START_OFFSET_RDX4, 1); /* default 0 */
+    lgw_reg_w(LGW_ADJUST_MODEM_START_OFFSET_SF12_RDX4, 4094); /* default 4092 */
+    lgw_reg_w(LGW_CORR_MAC_GAIN, 7); /* default 5 */
+
+    /* FSK datapath setup */
+    lgw_reg_w(LGW_FSK_RX_INVERT,1); /* default 0 */
+    lgw_reg_w(LGW_FSK_MODEM_INVERT_IQ,1); /* default 0 */
+
+    /* FSK demodulator setup */
+    lgw_reg_w(LGW_FSK_RSSI_LENGTH,4); /* default 0 */
+    lgw_reg_w(LGW_FSK_PKT_MODE,1); /* variable length, default 0 */
+    lgw_reg_w(LGW_FSK_CRC_EN,1); /* default 0 */
+    lgw_reg_w(LGW_FSK_DCFREE_ENC,2); /* default 0 */
+    // lgw_reg_w(LGW_FSK_CRC_IBM,0); /* default 0 */
+    lgw_reg_w(LGW_FSK_ERROR_OSR_TOL,10); /* default 0 */
+    lgw_reg_w(LGW_FSK_PKT_LENGTH,255); /* max packet length in variable length mode */
+    // lgw_reg_w(LGW_FSK_NODE_ADRS,0); /* default 0 */
+    // lgw_reg_w(LGW_FSK_BROADCAST,0); /* default 0 */
+    // lgw_reg_w(LGW_FSK_AUTO_AFC_ON,0); /* default 0 */
+    lgw_reg_w(LGW_FSK_PATTERN_TIMEOUT_CFG,128); /* sync timeout (allow 8 bytes preamble + 8 bytes sync word, default 0 */
+
+    /* TX general parameters */
+    lgw_reg_w(LGW_TX_START_DELAY, TX_START_DELAY_DEFAULT); /* default 0 */
+
+    /* TX LoRa */
+    // lgw_reg_w(LGW_TX_MODE,0); /* default 0 */
+    lgw_reg_w(LGW_TX_SWAP_IQ,1); /* "normal" polarity; default 0 */
+    if (lorawan_public) { /* LoRa network */
+        lgw_reg_w(LGW_TX_FRAME_SYNCH_PEAK1_POS,3); /* default 1 */
+        lgw_reg_w(LGW_TX_FRAME_SYNCH_PEAK2_POS,4); /* default 2 */
+    } else { /* Private network */
+        lgw_reg_w(LGW_TX_FRAME_SYNCH_PEAK1_POS,1); /* default 1 */
+        lgw_reg_w(LGW_TX_FRAME_SYNCH_PEAK2_POS,2); /* default 2 */
+    }
+
+    /* TX FSK */
+    // lgw_reg_w(LGW_FSK_TX_GAUSSIAN_EN,1); /* default 1 */
+    lgw_reg_w(LGW_FSK_TX_GAUSSIAN_SELECT_BT,2); /* Gaussian filter always on TX, default 0 */
+    // lgw_reg_w(LGW_FSK_TX_PATTERN_EN,1); /* default 1 */
+    // lgw_reg_w(LGW_FSK_TX_PREAMBLE_SEQ,0); /* default 0 */
+
+    return;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int32_t lgw_bw_getval(int x) {
+    switch (x) {
+        case BW_500KHZ: return 500000;
+        case BW_250KHZ: return 250000;
+        case BW_125KHZ: return 125000;
+        case BW_62K5HZ: return 62500;
+        case BW_31K2HZ: return 31200;
+        case BW_15K6HZ: return 15600;
+        case BW_7K8HZ : return 7800;
+        default: return -1;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int32_t lgw_sf_getval(int x) {
+    switch (x) {
+        case DR_LORA_SF7: return 7;
+        case DR_LORA_SF8: return 8;
+        case DR_LORA_SF9: return 9;
+        case DR_LORA_SF10: return 10;
+        case DR_LORA_SF11: return 11;
+        case DR_LORA_SF12: return 12;
+        default: return -1;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+uint16_t lgw_get_tx_start_delay(bool tx_notch_enable, uint8_t bw) {
+    float notch_delay_us = 0.0;
+    float bw_delay_us = 0.0;
+    float tx_start_delay;
+
+    /* Notch filtering performed by FPGA adds a constant delay (group delay) that we need to compensate */
+    if (tx_notch_enable) {
+        notch_delay_us = lgw_fpga_get_tx_notch_delay();
+    }
+
+    /* Calibrated delay brought by SX1301 depending on signal bandwidth */
+    switch (bw) {
+        case BW_125KHZ:
+            bw_delay_us = 1.5;
+            break;
+        case BW_500KHZ:
+            /* Intended fall-through: it is the calibrated reference */
+        default:
+            break;
+    }
+
+    tx_start_delay = (float)TX_START_DELAY_DEFAULT - bw_delay_us - notch_delay_us;
+
+    printf("INFO: tx_start_delay=%u (%f) - (%u, bw_delay=%f, notch_delay=%f)\n", (uint16_t)tx_start_delay, tx_start_delay, TX_START_DELAY_DEFAULT, bw_delay_us, notch_delay_us);
+
+    return (uint16_t)tx_start_delay; /* keep truncating instead of rounding: better behaviour measured */
+}
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+int lgw_board_setconf(struct lgw_conf_board_s conf) {
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == true) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS RUNNING, STOP IT BEFORE TOUCHING CONFIGURATION\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* set internal config according to parameters */
+    lorawan_public = conf.lorawan_public;
+    rf_clkout = conf.clksrc;
+
+    DEBUG_PRINTF("Note: board configuration; lorawan_public:%d, clksrc:%d\n", lorawan_public, rf_clkout);
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_lbt_setconf(struct lgw_conf_lbt_s conf) {
+    int x;
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == true) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS RUNNING, STOP IT BEFORE TOUCHING CONFIGURATION\n");
+        return LGW_HAL_ERROR;
+    }
+
+    x = lbt_setconf(&conf);
+    if (x != LGW_LBT_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure concentrator for LBT\n");
+        return LGW_HAL_ERROR;
+    }
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_rxrf_setconf(uint8_t rf_chain, struct lgw_conf_rxrf_s conf) {
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == true) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS RUNNING, STOP IT BEFORE TOUCHING CONFIGURATION\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check input range (segfault prevention) */
+    if (rf_chain >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: NOT A VALID RF_CHAIN NUMBER\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check if radio type is supported */
+    if ((conf.type != LGW_RADIO_TYPE_SX1255) && (conf.type != LGW_RADIO_TYPE_SX1257)) {
+        DEBUG_MSG("ERROR: NOT A VALID RADIO TYPE\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check if TX notch filter frequency is supported */
+    if ((conf.tx_enable == true) && ((conf.tx_notch_freq < LGW_MIN_NOTCH_FREQ) || (conf.tx_notch_freq > LGW_MAX_NOTCH_FREQ))) {
+        DEBUG_PRINTF("WARNING: NOT A VALID TX NOTCH FILTER FREQUENCY [%u..%u]Hz\n", LGW_MIN_NOTCH_FREQ, LGW_MAX_NOTCH_FREQ);
+        conf.tx_notch_freq = 0;
+    }
+
+    /* set internal config according to parameters */
+    rf_enable[rf_chain] = conf.enable;
+    rf_rx_freq[rf_chain] = conf.freq_hz;
+    rf_rssi_offset[rf_chain] = conf.rssi_offset;
+    rf_radio_type[rf_chain] = conf.type;
+    rf_tx_enable[rf_chain] = conf.tx_enable;
+    rf_tx_notch_freq[rf_chain] = conf.tx_notch_freq;
+
+    DEBUG_PRINTF("Note: rf_chain %d configuration; en:%d freq:%d rssi_offset:%f radio_type:%d tx_enable:%d tx_notch_freq:%u\n", rf_chain, rf_enable[rf_chain], rf_rx_freq[rf_chain], rf_rssi_offset[rf_chain], rf_radio_type[rf_chain], rf_tx_enable[rf_chain], rf_tx_notch_freq[rf_chain]);
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_rxif_setconf(uint8_t if_chain, struct lgw_conf_rxif_s conf) {
+    int32_t bw_hz;
+    uint32_t rf_rx_bandwidth;
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == true) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS RUNNING, STOP IT BEFORE TOUCHING CONFIGURATION\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check input range (segfault prevention) */
+    if (if_chain >= LGW_IF_CHAIN_NB) {
+        DEBUG_PRINTF("ERROR: %d NOT A VALID IF_CHAIN NUMBER\n", if_chain);
+        return LGW_HAL_ERROR;
+    }
+
+    /* if chain is disabled, don't care about most parameters */
+    if (conf.enable == false) {
+        if_enable[if_chain] = false;
+        if_freq[if_chain] = 0;
+        DEBUG_PRINTF("Note: if_chain %d disabled\n", if_chain);
+        return LGW_HAL_SUCCESS;
+    }
+
+    /* check 'general' parameters */
+    if (ifmod_config[if_chain] == IF_UNDEFINED) {
+        DEBUG_PRINTF("ERROR: IF CHAIN %d NOT CONFIGURABLE\n", if_chain);
+    }
+    if (conf.rf_chain >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: INVALID RF_CHAIN TO ASSOCIATE WITH A LORA_STD IF CHAIN\n");
+        return LGW_HAL_ERROR;
+    }
+    /* check if IF frequency is optimal based on channel and radio bandwidths */
+    switch (conf.bandwidth) {
+        case BW_250KHZ:
+            rf_rx_bandwidth = LGW_RF_RX_BANDWIDTH_250KHZ; /* radio bandwidth */
+            break;
+        case BW_500KHZ:
+            rf_rx_bandwidth = LGW_RF_RX_BANDWIDTH_500KHZ; /* radio bandwidth */
+            break;
+        default:
+            /* For 125KHz and below */
+            rf_rx_bandwidth = LGW_RF_RX_BANDWIDTH_125KHZ; /* radio bandwidth */
+            break;
+    }
+    bw_hz = lgw_bw_getval(conf.bandwidth); /* channel bandwidth */
+    if ((conf.freq_hz + ((bw_hz==-1)?LGW_REF_BW:bw_hz)/2) > ((int32_t)rf_rx_bandwidth/2)) {
+        DEBUG_PRINTF("ERROR: IF FREQUENCY %d TOO HIGH\n", conf.freq_hz);
+        return LGW_HAL_ERROR;
+    } else if ((conf.freq_hz - ((bw_hz==-1)?LGW_REF_BW:bw_hz)/2) < -((int32_t)rf_rx_bandwidth/2)) {
+        DEBUG_PRINTF("ERROR: IF FREQUENCY %d TOO LOW\n", conf.freq_hz);
+        return LGW_HAL_ERROR;
+    }
+
+    /* check parameters according to the type of IF chain + modem,
+    fill default if necessary, and commit configuration if everything is OK */
+    switch (ifmod_config[if_chain]) {
+        case IF_LORA_STD:
+            /* fill default parameters if needed */
+            if (conf.bandwidth == BW_UNDEFINED) {
+                conf.bandwidth = BW_250KHZ;
+            }
+            if (conf.datarate == DR_UNDEFINED) {
+                conf.datarate = DR_LORA_SF9;
+            }
+            /* check BW & DR */
+            if (!IS_LORA_BW(conf.bandwidth)) {
+                DEBUG_MSG("ERROR: BANDWIDTH NOT SUPPORTED BY LORA_STD IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            if (!IS_LORA_STD_DR(conf.datarate)) {
+                DEBUG_MSG("ERROR: DATARATE NOT SUPPORTED BY LORA_STD IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            /* set internal configuration  */
+            if_enable[if_chain] = conf.enable;
+            if_rf_chain[if_chain] = conf.rf_chain;
+            if_freq[if_chain] = conf.freq_hz;
+            lora_rx_bw = conf.bandwidth;
+            lora_rx_sf = (uint8_t)(DR_LORA_MULTI & conf.datarate); /* filter SF out of the 7-12 range */
+            if (SET_PPM_ON(conf.bandwidth, conf.datarate)) {
+                lora_rx_ppm_offset = true;
+            } else {
+                lora_rx_ppm_offset = false;
+            }
+
+            DEBUG_PRINTF("Note: LoRa 'std' if_chain %d configuration; en:%d freq:%d bw:%d dr:%d\n", if_chain, if_enable[if_chain], if_freq[if_chain], lora_rx_bw, lora_rx_sf);
+            break;
+
+        case IF_LORA_MULTI:
+            /* fill default parameters if needed */
+            if (conf.bandwidth == BW_UNDEFINED) {
+                conf.bandwidth = BW_125KHZ;
+            }
+            if (conf.datarate == DR_UNDEFINED) {
+                conf.datarate = DR_LORA_MULTI;
+            }
+            /* check BW & DR */
+            if (conf.bandwidth != BW_125KHZ) {
+                DEBUG_MSG("ERROR: BANDWIDTH NOT SUPPORTED BY LORA_MULTI IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            if (!IS_LORA_MULTI_DR(conf.datarate)) {
+                DEBUG_MSG("ERROR: DATARATE(S) NOT SUPPORTED BY LORA_MULTI IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            /* set internal configuration  */
+            if_enable[if_chain] = conf.enable;
+            if_rf_chain[if_chain] = conf.rf_chain;
+            if_freq[if_chain] = conf.freq_hz;
+            lora_multi_sfmask[if_chain] = (uint8_t)(DR_LORA_MULTI & conf.datarate); /* filter SF out of the 7-12 range */
+
+            DEBUG_PRINTF("Note: LoRa 'multi' if_chain %d configuration; en:%d freq:%d SF_mask:0x%02x\n", if_chain, if_enable[if_chain], if_freq[if_chain], lora_multi_sfmask[if_chain]);
+            break;
+
+        case IF_FSK_STD:
+            /* fill default parameters if needed */
+            if (conf.bandwidth == BW_UNDEFINED) {
+                conf.bandwidth = BW_250KHZ;
+            }
+            if (conf.datarate == DR_UNDEFINED) {
+                conf.datarate = 64000; /* default datarate */
+            }
+            /* check BW & DR */
+            if(!IS_FSK_BW(conf.bandwidth)) {
+                DEBUG_MSG("ERROR: BANDWIDTH NOT SUPPORTED BY FSK IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            if(!IS_FSK_DR(conf.datarate)) {
+                DEBUG_MSG("ERROR: DATARATE NOT SUPPORTED BY FSK IF CHAIN\n");
+                return LGW_HAL_ERROR;
+            }
+            /* set internal configuration  */
+            if_enable[if_chain] = conf.enable;
+            if_rf_chain[if_chain] = conf.rf_chain;
+            if_freq[if_chain] = conf.freq_hz;
+            fsk_rx_bw = conf.bandwidth;
+            fsk_rx_dr = conf.datarate;
+            if (conf.sync_word > 0) {
+                fsk_sync_word_size = conf.sync_word_size;
+                fsk_sync_word = conf.sync_word;
+            }
+            DEBUG_PRINTF("Note: FSK if_chain %d configuration; en:%d freq:%d bw:%d dr:%d (%d real dr) sync:0x%0*llX\n", if_chain, if_enable[if_chain], if_freq[if_chain], fsk_rx_bw, fsk_rx_dr, LGW_XTAL_FREQU/(LGW_XTAL_FREQU/fsk_rx_dr), 2*fsk_sync_word_size, fsk_sync_word);
+            break;
+
+        default:
+            DEBUG_PRINTF("ERROR: IF CHAIN %d TYPE NOT SUPPORTED\n", if_chain);
+            return LGW_HAL_ERROR;
+    }
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_txgain_setconf(struct lgw_tx_gain_lut_s *conf) {
+    int i;
+
+    /* Check LUT size */
+    if ((conf->size < 1) || (conf->size > TX_GAIN_LUT_SIZE_MAX)) {
+        DEBUG_PRINTF("ERROR: TX gain LUT must have at least one entry and  maximum %d entries\n", TX_GAIN_LUT_SIZE_MAX);
+        return LGW_HAL_ERROR;
+    }
+
+    txgain_lut.size = conf->size;
+
+    for (i = 0; i < txgain_lut.size; i++) {
+        /* Check gain range */
+        if (conf->lut[i].dig_gain > 3) {
+            DEBUG_MSG("ERROR: TX gain LUT: SX1301 digital gain must be between 0 and 3\n");
+            return LGW_HAL_ERROR;
+        }
+        if (conf->lut[i].dac_gain != 3) {
+            DEBUG_MSG("ERROR: TX gain LUT: SX1257 DAC gains != 3 are not supported\n");
+            return LGW_HAL_ERROR;
+        }
+        if (conf->lut[i].mix_gain > 15) {
+            DEBUG_MSG("ERROR: TX gain LUT: SX1257 mixer gain must not exceed 15\n");
+            return LGW_HAL_ERROR;
+        } else if (conf->lut[i].mix_gain < 8) {
+            DEBUG_MSG("ERROR: TX gain LUT: SX1257 mixer gains < 8 are not supported\n");
+            return LGW_HAL_ERROR;
+        }
+        if (conf->lut[i].pa_gain > 3) {
+            DEBUG_MSG("ERROR: TX gain LUT: External PA gain must not exceed 3\n");
+            return LGW_HAL_ERROR;
+        }
+
+        /* Set internal LUT */
+        txgain_lut.lut[i].dig_gain = conf->lut[i].dig_gain;
+        txgain_lut.lut[i].dac_gain = conf->lut[i].dac_gain;
+        txgain_lut.lut[i].mix_gain = conf->lut[i].mix_gain;
+        txgain_lut.lut[i].pa_gain  = conf->lut[i].pa_gain;
+        txgain_lut.lut[i].rf_power = conf->lut[i].rf_power;
+    }
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_start(void) {
+    int i, err;
+    int reg_stat;
+    unsigned x;
+    uint8_t radio_select;
+    int32_t read_val;
+    uint8_t load_val;
+    uint8_t fw_version;
+    uint8_t cal_cmd;
+    uint16_t cal_time;
+    uint8_t cal_status;
+
+    uint64_t fsk_sync_word_reg;
+
+    if (lgw_is_started == true) {
+        DEBUG_MSG("Note: LoRa concentrator already started, restarting it now\n");
+    }
+
+    reg_stat = lgw_connect(false, rf_tx_notch_freq[rf_tx_enable[1]?1:0]);
+    if (reg_stat == LGW_REG_ERROR) {
+        DEBUG_MSG("ERROR: FAIL TO CONNECT BOARD\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* reset the registers (also shuts the radios down) */
+    lgw_soft_reset();
+
+    /* gate clocks */
+    lgw_reg_w(LGW_GLOBAL_EN, 0);
+    lgw_reg_w(LGW_CLK32M_EN, 0);
+
+    /* switch on and reset the radios (also starts the 32 MHz XTAL) */
+    lgw_reg_w(LGW_RADIO_A_EN,1);
+    lgw_reg_w(LGW_RADIO_B_EN,1);
+    wait_ms(500); /* TODO: optimize */
+    lgw_reg_w(LGW_RADIO_RST,1);
+    wait_ms(5);
+    lgw_reg_w(LGW_RADIO_RST,0);
+
+    /* setup the radios */
+    err = lgw_setup_sx125x(0, rf_clkout, rf_enable[0], rf_radio_type[0], rf_rx_freq[0]);
+    if (err != 0) {
+        DEBUG_MSG("ERROR: Failed to setup sx125x radio for RF chain 0\n");
+        return LGW_HAL_ERROR;
+    }
+    err = lgw_setup_sx125x(1, rf_clkout, rf_enable[1], rf_radio_type[1], rf_rx_freq[1]);
+    if (err != 0) {
+        DEBUG_MSG("ERROR: Failed to setup sx125x radio for RF chain 0\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* gives AGC control of GPIOs to enable Tx external digital filter */
+    lgw_reg_w(LGW_GPIO_MODE,31); /* Set all GPIOs as output */
+    lgw_reg_w(LGW_GPIO_SELECT_OUTPUT,2);
+
+    /* Configure LBT */
+    if (lbt_is_enabled() == true) {
+        lgw_reg_w(LGW_CLK32M_EN, 1);
+        i = lbt_setup();
+        if (i != LGW_LBT_SUCCESS) {
+            DEBUG_MSG("ERROR: lbt_setup() did not return SUCCESS\n");
+            return LGW_HAL_ERROR;
+        }
+
+        /* Start SX1301 counter and LBT FSM at the same time to be in sync */
+        lgw_reg_w(LGW_CLK32M_EN, 0);
+        i = lbt_start();
+        if (i != LGW_LBT_SUCCESS) {
+            DEBUG_MSG("ERROR: lbt_start() did not return SUCCESS\n");
+            return LGW_HAL_ERROR;
+        }
+    }
+
+    /* Enable clocks */
+    lgw_reg_w(LGW_GLOBAL_EN, 1);
+    lgw_reg_w(LGW_CLK32M_EN, 1);
+
+    /* GPIOs table :
+    DGPIO0 -> N/A
+    DGPIO1 -> N/A
+    DGPIO2 -> N/A
+    DGPIO3 -> TX digital filter ON
+    DGPIO4 -> TX ON
+    */
+
+    /* select calibration command */
+    cal_cmd = 0;
+    cal_cmd |= rf_enable[0] ? 0x01 : 0x00; /* Bit 0: Calibrate Rx IQ mismatch compensation on radio A */
+    cal_cmd |= rf_enable[1] ? 0x02 : 0x00; /* Bit 1: Calibrate Rx IQ mismatch compensation on radio B */
+    cal_cmd |= (rf_enable[0] && rf_tx_enable[0]) ? 0x04 : 0x00; /* Bit 2: Calibrate Tx DC offset on radio A */
+    cal_cmd |= (rf_enable[1] && rf_tx_enable[1]) ? 0x08 : 0x00; /* Bit 3: Calibrate Tx DC offset on radio B */
+    cal_cmd |= 0x10; /* Bit 4: 0: calibrate with DAC gain=2, 1: with DAC gain=3 (use 3) */
+
+    switch (rf_radio_type[0]) { /* we assume that there is only one radio type on the board */
+        case LGW_RADIO_TYPE_SX1255:
+            cal_cmd |= 0x20; /* Bit 5: 0: SX1257, 1: SX1255 */
+            break;
+        case LGW_RADIO_TYPE_SX1257:
+            cal_cmd |= 0x00; /* Bit 5: 0: SX1257, 1: SX1255 */
+            break;
+        default:
+            DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d FOR RADIO TYPE\n", rf_radio_type[0]);
+            break;
+    }
+
+    cal_cmd |= 0x00; /* Bit 6-7: Board type 0: ref, 1: FPGA, 3: board X */
+    cal_time = 2300; /* measured between 2.1 and 2.2 sec, because 1 TX only */
+
+    /* Load the calibration firmware  */
+    load_firmware(MCU_AGC, cal_firmware, MCU_AGC_FW_BYTE);
+    lgw_reg_w(LGW_FORCE_HOST_RADIO_CTRL, 0); /* gives to AGC MCU the control of the radios */
+    lgw_reg_w(LGW_RADIO_SELECT, cal_cmd); /* send calibration configuration word */
+    lgw_reg_w(LGW_MCU_RST_1, 0);
+
+    /* Check firmware version */
+    lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, FW_VERSION_ADDR);
+    lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+    fw_version = (uint8_t)read_val;
+    if (fw_version != FW_VERSION_CAL) {
+        printf("ERROR: Version of calibration firmware not expected, actual:%d expected:%d\n", fw_version, FW_VERSION_CAL);
+        return -1;
+    }
+
+    lgw_reg_w(LGW_PAGE_REG, 3); /* Calibration will start on this condition as soon as MCU can talk to concentrator registers */
+    lgw_reg_w(LGW_EMERGENCY_FORCE_HOST_CTRL, 0); /* Give control of concentrator registers to MCU */
+
+    /* Wait for calibration to end */
+    DEBUG_PRINTF("Note: calibration started (time: %u ms)\n", cal_time);
+    wait_ms(cal_time); /* Wait for end of calibration */
+    lgw_reg_w(LGW_EMERGENCY_FORCE_HOST_CTRL, 1); /* Take back control */
+
+    /* Get calibration status */
+    lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+    cal_status = (uint8_t)read_val;
+    /*
+        bit 7: calibration finished
+        bit 0: could access SX1301 registers
+        bit 1: could access radio A registers
+        bit 2: could access radio B registers
+        bit 3: radio A RX image rejection successful
+        bit 4: radio B RX image rejection successful
+        bit 5: radio A TX DC Offset correction successful
+        bit 6: radio B TX DC Offset correction successful
+    */
+    if ((cal_status & 0x81) != 0x81) {
+        DEBUG_PRINTF("ERROR: CALIBRATION FAILURE (STATUS = %u)\n", cal_status);
+        return LGW_HAL_ERROR;
+    } else {
+        DEBUG_PRINTF("Note: calibration finished (status = %u)\n", cal_status);
+    }
+    if (rf_enable[0] && ((cal_status & 0x02) == 0)) {
+        DEBUG_MSG("WARNING: calibration could not access radio A\n");
+    }
+    if (rf_enable[1] && ((cal_status & 0x04) == 0)) {
+        DEBUG_MSG("WARNING: calibration could not access radio B\n");
+    }
+    if (rf_enable[0] && ((cal_status & 0x08) == 0)) {
+        DEBUG_MSG("WARNING: problem in calibration of radio A for image rejection\n");
+    }
+    if (rf_enable[1] && ((cal_status & 0x10) == 0)) {
+        DEBUG_MSG("WARNING: problem in calibration of radio B for image rejection\n");
+    }
+    if (rf_enable[0] && rf_tx_enable[0] && ((cal_status & 0x20) == 0)) {
+        DEBUG_MSG("WARNING: problem in calibration of radio A for TX DC offset\n");
+    }
+    if (rf_enable[1] && rf_tx_enable[1] && ((cal_status & 0x40) == 0)) {
+        DEBUG_MSG("WARNING: problem in calibration of radio B for TX DC offset\n");
+    }
+
+    /* Get TX DC offset values */
+    for(i=0; i<=7; ++i) {
+        lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, 0xA0+i);
+        lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+        cal_offset_a_i[i] = (int8_t)read_val;
+        lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, 0xA8+i);
+        lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+        cal_offset_a_q[i] = (int8_t)read_val;
+        lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, 0xB0+i);
+        lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+        cal_offset_b_i[i] = (int8_t)read_val;
+        lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, 0xB8+i);
+        lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+        cal_offset_b_q[i] = (int8_t)read_val;
+    }
+
+    /* load adjusted parameters */
+    lgw_constant_adjust();
+
+    /* Sanity check for RX frequency */
+    if (rf_rx_freq[0] == 0) {
+        DEBUG_MSG("ERROR: wrong configuration, rf_rx_freq[0] is not set\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* Freq-to-time-drift calculation */
+    x = 4096000000 / (rf_rx_freq[0] >> 1); /* dividend: (4*2048*1000000) >> 1, rescaled to avoid 32b overflow */
+    x = ( x > 63 ) ? 63 : x; /* saturation */
+    lgw_reg_w(LGW_FREQ_TO_TIME_DRIFT, x); /* default 9 */
+
+    x = 4096000000 / (rf_rx_freq[0] >> 3); /* dividend: (16*2048*1000000) >> 3, rescaled to avoid 32b overflow */
+    x = ( x > 63 ) ? 63 : x; /* saturation */
+    lgw_reg_w(LGW_MBWSSF_FREQ_TO_TIME_DRIFT, x); /* default 36 */
+
+    /* configure LoRa 'multi' demodulators aka. LoRa 'sensor' channels (IF0-3) */
+    radio_select = 0; /* IF mapping to radio A/B (per bit, 0=A, 1=B) */
+    for(i=0; i<LGW_MULTI_NB; ++i) {
+        radio_select += (if_rf_chain[i] == 1 ? 1 << i : 0); /* transform bool array into binary word */
+    }
+    /*
+    lgw_reg_w(LGW_RADIO_SELECT, radio_select);
+
+    LGW_RADIO_SELECT is used for communication with the firmware, "radio_select"
+    will be loaded in LGW_RADIO_SELECT at the end of start procedure.
+    */
+
+    lgw_reg_w(LGW_IF_FREQ_0, IF_HZ_TO_REG(if_freq[0])); /* default -384 */
+    lgw_reg_w(LGW_IF_FREQ_1, IF_HZ_TO_REG(if_freq[1])); /* default -128 */
+    lgw_reg_w(LGW_IF_FREQ_2, IF_HZ_TO_REG(if_freq[2])); /* default 128 */
+    lgw_reg_w(LGW_IF_FREQ_3, IF_HZ_TO_REG(if_freq[3])); /* default 384 */
+    lgw_reg_w(LGW_IF_FREQ_4, IF_HZ_TO_REG(if_freq[4])); /* default -384 */
+    lgw_reg_w(LGW_IF_FREQ_5, IF_HZ_TO_REG(if_freq[5])); /* default -128 */
+    lgw_reg_w(LGW_IF_FREQ_6, IF_HZ_TO_REG(if_freq[6])); /* default 128 */
+    lgw_reg_w(LGW_IF_FREQ_7, IF_HZ_TO_REG(if_freq[7])); /* default 384 */
+
+    lgw_reg_w(LGW_CORR0_DETECT_EN, (if_enable[0] == true) ? lora_multi_sfmask[0] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR1_DETECT_EN, (if_enable[1] == true) ? lora_multi_sfmask[1] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR2_DETECT_EN, (if_enable[2] == true) ? lora_multi_sfmask[2] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR3_DETECT_EN, (if_enable[3] == true) ? lora_multi_sfmask[3] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR4_DETECT_EN, (if_enable[4] == true) ? lora_multi_sfmask[4] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR5_DETECT_EN, (if_enable[5] == true) ? lora_multi_sfmask[5] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR6_DETECT_EN, (if_enable[6] == true) ? lora_multi_sfmask[6] : 0); /* default 0 */
+    lgw_reg_w(LGW_CORR7_DETECT_EN, (if_enable[7] == true) ? lora_multi_sfmask[7] : 0); /* default 0 */
+
+    lgw_reg_w(LGW_PPM_OFFSET, 0x60); /* as the threshold is 16ms, use 0x60 to enable ppm_offset for SF12 and SF11 @125kHz*/
+
+    lgw_reg_w(LGW_CONCENTRATOR_MODEM_ENABLE, 1); /* default 0 */
+
+    /* configure LoRa 'stand-alone' modem (IF8) */
+    lgw_reg_w(LGW_IF_FREQ_8, IF_HZ_TO_REG(if_freq[8])); /* MBWSSF modem (default 0) */
+    if (if_enable[8] == true) {
+        lgw_reg_w(LGW_MBWSSF_RADIO_SELECT, if_rf_chain[8]);
+        switch(lora_rx_bw) {
+            case BW_125KHZ: lgw_reg_w(LGW_MBWSSF_MODEM_BW, 0); break;
+            case BW_250KHZ: lgw_reg_w(LGW_MBWSSF_MODEM_BW, 1); break;
+            case BW_500KHZ: lgw_reg_w(LGW_MBWSSF_MODEM_BW, 2); break;
+            default:
+                DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", lora_rx_bw);
+                return LGW_HAL_ERROR;
+        }
+        switch(lora_rx_sf) {
+            case DR_LORA_SF7: lgw_reg_w(LGW_MBWSSF_RATE_SF, 7); break;
+            case DR_LORA_SF8: lgw_reg_w(LGW_MBWSSF_RATE_SF, 8); break;
+            case DR_LORA_SF9: lgw_reg_w(LGW_MBWSSF_RATE_SF, 9); break;
+            case DR_LORA_SF10: lgw_reg_w(LGW_MBWSSF_RATE_SF, 10); break;
+            case DR_LORA_SF11: lgw_reg_w(LGW_MBWSSF_RATE_SF, 11); break;
+            case DR_LORA_SF12: lgw_reg_w(LGW_MBWSSF_RATE_SF, 12); break;
+            default:
+                DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", lora_rx_sf);
+                return LGW_HAL_ERROR;
+        }
+        lgw_reg_w(LGW_MBWSSF_PPM_OFFSET, lora_rx_ppm_offset); /* default 0 */
+        lgw_reg_w(LGW_MBWSSF_MODEM_ENABLE, 1); /* default 0 */
+    } else {
+        lgw_reg_w(LGW_MBWSSF_MODEM_ENABLE, 0);
+    }
+
+    /* configure FSK modem (IF9) */
+    lgw_reg_w(LGW_IF_FREQ_9, IF_HZ_TO_REG(if_freq[9])); /* FSK modem, default 0 */
+    lgw_reg_w(LGW_FSK_PSIZE, fsk_sync_word_size-1);
+    lgw_reg_w(LGW_FSK_TX_PSIZE, fsk_sync_word_size-1);
+    fsk_sync_word_reg = fsk_sync_word << (8 * (8 - fsk_sync_word_size));
+    lgw_reg_w(LGW_FSK_REF_PATTERN_LSB, (uint32_t)(0xFFFFFFFF & fsk_sync_word_reg));
+    lgw_reg_w(LGW_FSK_REF_PATTERN_MSB, (uint32_t)(0xFFFFFFFF & (fsk_sync_word_reg >> 32)));
+    if (if_enable[9] == true) {
+        lgw_reg_w(LGW_FSK_RADIO_SELECT, if_rf_chain[9]);
+        lgw_reg_w(LGW_FSK_BR_RATIO, LGW_XTAL_FREQU/fsk_rx_dr); /* setting the dividing ratio for datarate */
+        lgw_reg_w(LGW_FSK_CH_BW_EXPO, fsk_rx_bw);
+        lgw_reg_w(LGW_FSK_MODEM_ENABLE, 1); /* default 0 */
+    } else {
+        lgw_reg_w(LGW_FSK_MODEM_ENABLE, 0);
+    }
+
+    /* Load firmware */
+    load_firmware(MCU_ARB, arb_firmware, MCU_ARB_FW_BYTE);
+    load_firmware(MCU_AGC, agc_firmware, MCU_AGC_FW_BYTE);
+
+    /* gives the AGC MCU control over radio, RF front-end and filter gain */
+    lgw_reg_w(LGW_FORCE_HOST_RADIO_CTRL, 0);
+    lgw_reg_w(LGW_FORCE_HOST_FE_CTRL, 0);
+    lgw_reg_w(LGW_FORCE_DEC_FILTER_GAIN, 0);
+
+    /* Get MCUs out of reset */
+    lgw_reg_w(LGW_RADIO_SELECT, 0); /* MUST not be = to 1 or 2 at firmware init */
+    lgw_reg_w(LGW_MCU_RST_0, 0);
+    lgw_reg_w(LGW_MCU_RST_1, 0);
+
+    /* Check firmware version */
+    lgw_reg_w(LGW_DBG_AGC_MCU_RAM_ADDR, FW_VERSION_ADDR);
+    lgw_reg_r(LGW_DBG_AGC_MCU_RAM_DATA, &read_val);
+    fw_version = (uint8_t)read_val;
+    if (fw_version != FW_VERSION_AGC) {
+        DEBUG_PRINTF("ERROR: Version of AGC firmware not expected, actual:%d expected:%d\n", fw_version, FW_VERSION_AGC);
+        return LGW_HAL_ERROR;
+    }
+    lgw_reg_w(LGW_DBG_ARB_MCU_RAM_ADDR, FW_VERSION_ADDR);
+    lgw_reg_r(LGW_DBG_ARB_MCU_RAM_DATA, &read_val);
+    fw_version = (uint8_t)read_val;
+    if (fw_version != FW_VERSION_ARB) {
+        DEBUG_PRINTF("ERROR: Version of arbiter firmware not expected, actual:%d expected:%d\n", fw_version, FW_VERSION_ARB);
+        return LGW_HAL_ERROR;
+    }
+
+    DEBUG_MSG("Info: Initialising AGC firmware...\n");
+    wait_ms(1);
+
+    lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+    if (read_val != 0x10) {
+        DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+        return LGW_HAL_ERROR;
+    }
+
+    /* Update Tx gain LUT and start AGC */
+    for (i = 0; i < txgain_lut.size; ++i) {
+        lgw_reg_w(LGW_RADIO_SELECT, AGC_CMD_WAIT); /* start a transaction */
+        wait_ms(1);
+        load_val = txgain_lut.lut[i].mix_gain + (16 * txgain_lut.lut[i].dac_gain) + (64 * txgain_lut.lut[i].pa_gain);
+        lgw_reg_w(LGW_RADIO_SELECT, load_val);
+        wait_ms(1);
+        lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+        if (read_val != (0x30 + i)) {
+            DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+            return LGW_HAL_ERROR;
+        }
+    }
+    /* As the AGC fw is waiting for 16 entries, we need to abort the transaction if we get less entries */
+    if (txgain_lut.size < TX_GAIN_LUT_SIZE_MAX) {
+        lgw_reg_w(LGW_RADIO_SELECT, AGC_CMD_WAIT);
+        wait_ms(1);
+        load_val = AGC_CMD_ABORT;
+        lgw_reg_w(LGW_RADIO_SELECT, load_val);
+        wait_ms(1);
+        lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+        if (read_val != 0x30) {
+            DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+            return LGW_HAL_ERROR;
+        }
+    }
+
+    /* Load Tx freq MSBs (always 3 if f > 768 for SX1257 or f > 384 for SX1255 */
+    lgw_reg_w(LGW_RADIO_SELECT, AGC_CMD_WAIT);
+    wait_ms(1);
+    lgw_reg_w(LGW_RADIO_SELECT, 3);
+    wait_ms(1);
+    lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+    if (read_val != 0x33) {
+        DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+        return LGW_HAL_ERROR;
+    }
+
+    /* Load chan_select firmware option */
+    lgw_reg_w(LGW_RADIO_SELECT, AGC_CMD_WAIT);
+    wait_ms(1);
+    lgw_reg_w(LGW_RADIO_SELECT, 0);
+    wait_ms(1);
+    lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+    if (read_val != 0x30) {
+        DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+        return LGW_HAL_ERROR;
+    }
+
+    /* End AGC firmware init and check status */
+    lgw_reg_w(LGW_RADIO_SELECT, AGC_CMD_WAIT);
+    wait_ms(1);
+    lgw_reg_w(LGW_RADIO_SELECT, radio_select); /* Load intended value of RADIO_SELECT */
+    wait_ms(1);
+    DEBUG_MSG("Info: putting back original RADIO_SELECT value\n");
+    lgw_reg_r(LGW_MCU_AGC_STATUS, &read_val);
+    if (read_val != 0x40) {
+        DEBUG_PRINTF("ERROR: AGC FIRMWARE INITIALIZATION FAILURE, STATUS 0x%02X\n", (uint8_t)read_val);
+        return LGW_HAL_ERROR;
+    }
+
+    /* enable GPS event capture */
+    lgw_reg_w(LGW_GPS_EN, 1);
+
+    /* */
+    if (lbt_is_enabled() == true) {
+        printf("INFO: Configuring LBT, this may take few seconds, please wait...\n");
+        wait_ms(8400);
+    }
+
+    lgw_is_started = true;
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_stop(void) {
+    lgw_soft_reset();
+    lgw_disconnect();
+
+    lgw_is_started = false;
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_receive(uint8_t max_pkt, struct lgw_pkt_rx_s *pkt_data) {
+    int nb_pkt_fetch; /* loop variable and return value */
+    struct lgw_pkt_rx_s *p; /* pointer to the current structure in the struct array */
+    uint8_t buff[255+RX_METADATA_NB]; /* buffer to store the result of SPI read bursts */
+    unsigned sz; /* size of the payload, uses to address metadata */
+    int ifmod; /* type of if_chain/modem a packet was received by */
+    int stat_fifo; /* the packet status as indicated in the FIFO */
+    uint32_t raw_timestamp; /* timestamp when internal 'RX finished' was triggered */
+    uint32_t delay_x, delay_y, delay_z; /* temporary variable for timestamp offset calculation */
+    uint32_t timestamp_correction; /* correction to account for processing delay */
+    uint32_t sf, cr, bw_pow, crc_en, ppm; /* used to calculate timestamp correction */
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == false) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS NOT RUNNING, START IT BEFORE RECEIVING\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check input variables */
+    if ((max_pkt <= 0) || (max_pkt > LGW_PKT_FIFO_SIZE)) {
+        DEBUG_PRINTF("ERROR: %d = INVALID MAX NUMBER OF PACKETS TO FETCH\n", max_pkt);
+        return LGW_HAL_ERROR;
+    }
+    CHECK_NULL(pkt_data);
+
+    /* Initialize buffer */
+    memset (buff, 0, sizeof buff);
+
+    /* iterate max_pkt times at most */
+    for (nb_pkt_fetch = 0; nb_pkt_fetch < max_pkt; ++nb_pkt_fetch) {
+
+        /* point to the proper struct in the struct array */
+        p = &pkt_data[nb_pkt_fetch];
+
+        /* fetch all the RX FIFO data */
+        lgw_reg_rb(LGW_RX_PACKET_DATA_FIFO_NUM_STORED, buff, 5);
+        /* 0:   number of packets available in RX data buffer */
+        /* 1,2: start address of the current packet in RX data buffer */
+        /* 3:   CRC status of the current packet */
+        /* 4:   size of the current packet payload in byte */
+
+        /* how many packets are in the RX buffer ? Break if zero */
+        if (buff[0] == 0) {
+            break; /* no more packets to fetch, exit out of FOR loop */
+        }
+
+        /* sanity check */
+        if (buff[0] > LGW_PKT_FIFO_SIZE) {
+            DEBUG_PRINTF("WARNING: %u = INVALID NUMBER OF PACKETS TO FETCH, ABORTING\n", buff[0]);
+            break;
+        }
+
+        DEBUG_PRINTF("FIFO content: %x %x %x %x %x\n", buff[0], buff[1], buff[2], buff[3], buff[4]);
+
+        p->size = buff[4];
+        sz = p->size;
+        stat_fifo = buff[3]; /* will be used later, need to save it before overwriting buff */
+
+        /* get payload + metadata */
+        lgw_reg_rb(LGW_RX_DATA_BUF_DATA, buff, sz+RX_METADATA_NB);
+
+        /* copy payload to result struct */
+        memcpy((void *)p->payload, (void *)buff, sz);
+
+        /* process metadata */
+        p->if_chain = buff[sz+0];
+        if (p->if_chain >= LGW_IF_CHAIN_NB) {
+            DEBUG_PRINTF("WARNING: %u NOT A VALID IF_CHAIN NUMBER, ABORTING\n", p->if_chain);
+            break;
+        }
+        ifmod = ifmod_config[p->if_chain];
+        DEBUG_PRINTF("[%d %d]\n", p->if_chain, ifmod);
+
+        p->rf_chain = (uint8_t)if_rf_chain[p->if_chain];
+        p->freq_hz = (uint32_t)((int32_t)rf_rx_freq[p->rf_chain] + if_freq[p->if_chain]);
+        p->rssi = (float)buff[sz+5] + rf_rssi_offset[p->rf_chain];
+
+        if ((ifmod == IF_LORA_MULTI) || (ifmod == IF_LORA_STD)) {
+            DEBUG_MSG("Note: LoRa packet\n");
+            switch(stat_fifo & 0x07) {
+                case 5:
+                    p->status = STAT_CRC_OK;
+                    crc_en = 1;
+                    break;
+                case 7:
+                    p->status = STAT_CRC_BAD;
+                    crc_en = 1;
+                    break;
+                case 1:
+                    p->status = STAT_NO_CRC;
+                    crc_en = 0;
+                    break;
+                default:
+                    p->status = STAT_UNDEFINED;
+                    crc_en = 0;
+            }
+            p->modulation = MOD_LORA;
+            p->snr = ((float)((int8_t)buff[sz+2]))/4;
+            p->snr_min = ((float)((int8_t)buff[sz+3]))/4;
+            p->snr_max = ((float)((int8_t)buff[sz+4]))/4;
+            if (ifmod == IF_LORA_MULTI) {
+                p->bandwidth = BW_125KHZ; /* fixed in hardware */
+            } else {
+                p->bandwidth = lora_rx_bw; /* get the parameter from the config variable */
+            }
+            sf = (buff[sz+1] >> 4) & 0x0F;
+            switch (sf) {
+                case 7: p->datarate = DR_LORA_SF7; break;
+                case 8: p->datarate = DR_LORA_SF8; break;
+                case 9: p->datarate = DR_LORA_SF9; break;
+                case 10: p->datarate = DR_LORA_SF10; break;
+                case 11: p->datarate = DR_LORA_SF11; break;
+                case 12: p->datarate = DR_LORA_SF12; break;
+                default: p->datarate = DR_UNDEFINED;
+            }
+            cr = (buff[sz+1] >> 1) & 0x07;
+            switch (cr) {
+                case 1: p->coderate = CR_LORA_4_5; break;
+                case 2: p->coderate = CR_LORA_4_6; break;
+                case 3: p->coderate = CR_LORA_4_7; break;
+                case 4: p->coderate = CR_LORA_4_8; break;
+                default: p->coderate = CR_UNDEFINED;
+            }
+
+            /* determine if 'PPM mode' is on, needed for timestamp correction */
+            if (SET_PPM_ON(p->bandwidth,p->datarate)) {
+                ppm = 1;
+            } else {
+                ppm = 0;
+            }
+
+            /* timestamp correction code, base delay */
+            if (ifmod == IF_LORA_STD) { /* if packet was received on the stand-alone LoRa modem */
+                switch (lora_rx_bw) {
+                    case BW_125KHZ:
+                        delay_x = 64;
+                        bw_pow = 1;
+                        break;
+                    case BW_250KHZ:
+                        delay_x = 32;
+                        bw_pow = 2;
+                        break;
+                    case BW_500KHZ:
+                        delay_x = 16;
+                        bw_pow = 4;
+                        break;
+                    default:
+                        DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", p->bandwidth);
+                        delay_x = 0;
+                        bw_pow = 0;
+                }
+            } else { /* packet was received on one of the sensor channels = 125kHz */
+                delay_x = 114;
+                bw_pow = 1;
+            }
+
+            /* timestamp correction code, variable delay */
+            if ((sf >= 6) && (sf <= 12) && (bw_pow > 0)) {
+                if ((2*(sz + 2*crc_en) - (sf-7)) <= 0) { /* payload fits entirely in first 8 symbols */
+                    delay_y = ( ((1<<(sf-1)) * (sf+1)) + (3 * (1<<(sf-4))) ) / bw_pow;
+                    delay_z = 32 * (2*(sz+2*crc_en) + 5) / bw_pow;
+                } else {
+                    delay_y = ( ((1<<(sf-1)) * (sf+1)) + ((4 - ppm) * (1<<(sf-4))) ) / bw_pow;
+                    delay_z = (16 + 4*cr) * (((2*(sz+2*crc_en)-sf+6) % (sf - 2*ppm)) + 1) / bw_pow;
+                }
+                timestamp_correction = delay_x + delay_y + delay_z;
+            } else {
+                timestamp_correction = 0;
+                DEBUG_MSG("WARNING: invalid packet, no timestamp correction\n");
+            }
+
+            /* RSSI correction */
+            if (ifmod == IF_LORA_MULTI) {
+                p->rssi -= RSSI_MULTI_BIAS;
+            }
+
+        } else if (ifmod == IF_FSK_STD) {
+            DEBUG_MSG("Note: FSK packet\n");
+            switch(stat_fifo & 0x07) {
+                case 5:
+                    p->status = STAT_CRC_OK;
+                    break;
+                case 7:
+                    p->status = STAT_CRC_BAD;
+                    break;
+                case 1:
+                    p->status = STAT_NO_CRC;
+                    break;
+                default:
+                    p->status = STAT_UNDEFINED;
+                    break;
+            }
+            p->modulation = MOD_FSK;
+            p->snr = -128.0;
+            p->snr_min = -128.0;
+            p->snr_max = -128.0;
+            p->bandwidth = fsk_rx_bw;
+            p->datarate = fsk_rx_dr;
+            p->coderate = CR_UNDEFINED;
+            timestamp_correction = ((uint32_t)680000 / fsk_rx_dr) - 20;
+
+            /* RSSI correction */
+            p->rssi = RSSI_FSK_POLY_0 + RSSI_FSK_POLY_1 * p->rssi + RSSI_FSK_POLY_2 * pow(p->rssi, 2);
+        } else {
+            DEBUG_MSG("ERROR: UNEXPECTED PACKET ORIGIN\n");
+            p->status = STAT_UNDEFINED;
+            p->modulation = MOD_UNDEFINED;
+            p->rssi = -128.0;
+            p->snr = -128.0;
+            p->snr_min = -128.0;
+            p->snr_max = -128.0;
+            p->bandwidth = BW_UNDEFINED;
+            p->datarate = DR_UNDEFINED;
+            p->coderate = CR_UNDEFINED;
+            timestamp_correction = 0;
+        }
+
+        raw_timestamp = (uint32_t)buff[sz+6] + ((uint32_t)buff[sz+7] << 8) + ((uint32_t)buff[sz+8] << 16) + ((uint32_t)buff[sz+9] << 24);
+        p->count_us = raw_timestamp - timestamp_correction;
+        p->crc = (uint16_t)buff[sz+10] + ((uint16_t)buff[sz+11] << 8);
+
+        /* advance packet FIFO */
+        lgw_reg_w(LGW_RX_PACKET_DATA_FIFO_NUM_STORED, 0);
+    }
+
+    return nb_pkt_fetch;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_send(struct lgw_pkt_tx_s pkt_data) {
+    int i, x;
+    uint8_t buff[256+TX_METADATA_NB]; /* buffer to prepare the packet to send + metadata before SPI write burst */
+    uint32_t part_int = 0; /* integer part for PLL register value calculation */
+    uint32_t part_frac = 0; /* fractional part for PLL register value calculation */
+    uint16_t fsk_dr_div; /* divider to configure for target datarate */
+    int transfer_size = 0; /* data to transfer from host to TX databuffer */
+    int payload_offset = 0; /* start of the payload content in the databuffer */
+    uint8_t pow_index = 0; /* 4-bit value to set the firmware TX power */
+    uint8_t target_mix_gain = 0; /* used to select the proper I/Q offset correction */
+    uint32_t count_trig = 0; /* timestamp value in trigger mode corrected for TX start delay */
+    bool tx_allowed = false;
+    uint16_t tx_start_delay;
+    bool tx_notch_enable = false;
+
+    /* check if the concentrator is running */
+    if (lgw_is_started == false) {
+        DEBUG_MSG("ERROR: CONCENTRATOR IS NOT RUNNING, START IT BEFORE SENDING\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check input range (segfault prevention) */
+    if (pkt_data.rf_chain >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: INVALID RF_CHAIN TO SEND PACKETS\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* check input variables */
+    if (rf_tx_enable[pkt_data.rf_chain] == false) {
+        DEBUG_MSG("ERROR: SELECTED RF_CHAIN IS DISABLED FOR TX ON SELECTED BOARD\n");
+        return LGW_HAL_ERROR;
+    }
+    if (rf_enable[pkt_data.rf_chain] == false) {
+        DEBUG_MSG("ERROR: SELECTED RF_CHAIN IS DISABLED\n");
+        return LGW_HAL_ERROR;
+    }
+    if (!IS_TX_MODE(pkt_data.tx_mode)) {
+        DEBUG_MSG("ERROR: TX_MODE NOT SUPPORTED\n");
+        return LGW_HAL_ERROR;
+    }
+    if (pkt_data.modulation == MOD_LORA) {
+        if (!IS_LORA_BW(pkt_data.bandwidth)) {
+            DEBUG_MSG("ERROR: BANDWIDTH NOT SUPPORTED BY LORA TX\n");
+            return LGW_HAL_ERROR;
+        }
+        if (!IS_LORA_STD_DR(pkt_data.datarate)) {
+            DEBUG_MSG("ERROR: DATARATE NOT SUPPORTED BY LORA TX\n");
+            return LGW_HAL_ERROR;
+        }
+        if (!IS_LORA_CR(pkt_data.coderate)) {
+            DEBUG_MSG("ERROR: CODERATE NOT SUPPORTED BY LORA TX\n");
+            return LGW_HAL_ERROR;
+        }
+        if (pkt_data.size > 255) {
+            DEBUG_MSG("ERROR: PAYLOAD LENGTH TOO BIG FOR LORA TX\n");
+            return LGW_HAL_ERROR;
+        }
+    } else if (pkt_data.modulation == MOD_FSK) {
+        if((pkt_data.f_dev < 1) || (pkt_data.f_dev > 200)) {
+            DEBUG_MSG("ERROR: TX FREQUENCY DEVIATION OUT OF ACCEPTABLE RANGE\n");
+            return LGW_HAL_ERROR;
+        }
+        if(!IS_FSK_DR(pkt_data.datarate)) {
+            DEBUG_MSG("ERROR: DATARATE NOT SUPPORTED BY FSK IF CHAIN\n");
+            return LGW_HAL_ERROR;
+        }
+        if (pkt_data.size > 255) {
+            DEBUG_MSG("ERROR: PAYLOAD LENGTH TOO BIG FOR FSK TX\n");
+            return LGW_HAL_ERROR;
+        }
+    } else {
+        DEBUG_MSG("ERROR: INVALID TX MODULATION\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* Enable notch filter for LoRa 125kHz */
+    if ((pkt_data.modulation == MOD_LORA) && (pkt_data.bandwidth == BW_125KHZ)) {
+        tx_notch_enable = true;
+    }
+
+    /* Get the TX start delay to be applied for this TX */
+    tx_start_delay = lgw_get_tx_start_delay(tx_notch_enable, pkt_data.bandwidth);
+
+    /* interpretation of TX power */
+    for (pow_index = txgain_lut.size-1; pow_index > 0; pow_index--) {
+        if (txgain_lut.lut[pow_index].rf_power <= pkt_data.rf_power) {
+            break;
+        }
+    }
+
+    /* loading TX imbalance correction */
+    target_mix_gain = txgain_lut.lut[pow_index].mix_gain;
+    if (pkt_data.rf_chain == 0) { /* use radio A calibration table */
+        lgw_reg_w(LGW_TX_OFFSET_I, cal_offset_a_i[target_mix_gain - 8]);
+        lgw_reg_w(LGW_TX_OFFSET_Q, cal_offset_a_q[target_mix_gain - 8]);
+    } else { /* use radio B calibration table */
+        lgw_reg_w(LGW_TX_OFFSET_I, cal_offset_b_i[target_mix_gain - 8]);
+        lgw_reg_w(LGW_TX_OFFSET_Q, cal_offset_b_q[target_mix_gain - 8]);
+    }
+
+    /* Set digital gain from LUT */
+    lgw_reg_w(LGW_TX_GAIN, txgain_lut.lut[pow_index].dig_gain);
+
+    /* fixed metadata, useful payload and misc metadata compositing */
+    transfer_size = TX_METADATA_NB + pkt_data.size; /*  */
+    payload_offset = TX_METADATA_NB; /* start the payload just after the metadata */
+
+    /* metadata 0 to 2, TX PLL frequency */
+    switch (rf_radio_type[0]) { /* we assume that there is only one radio type on the board */
+        case LGW_RADIO_TYPE_SX1255:
+            part_int = pkt_data.freq_hz / (SX125x_32MHz_FRAC << 7); /* integer part, gives the MSB */
+            part_frac = ((pkt_data.freq_hz % (SX125x_32MHz_FRAC << 7)) << 9) / SX125x_32MHz_FRAC; /* fractional part, gives middle part and LSB */
+            break;
+        case LGW_RADIO_TYPE_SX1257:
+            part_int = pkt_data.freq_hz / (SX125x_32MHz_FRAC << 8); /* integer part, gives the MSB */
+            part_frac = ((pkt_data.freq_hz % (SX125x_32MHz_FRAC << 8)) << 8) / SX125x_32MHz_FRAC; /* fractional part, gives middle part and LSB */
+            break;
+        default:
+            DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d FOR RADIO TYPE\n", rf_radio_type[0]);
+            break;
+    }
+
+    buff[0] = 0xFF & part_int; /* Most Significant Byte */
+    buff[1] = 0xFF & (part_frac >> 8); /* middle byte */
+    buff[2] = 0xFF & part_frac; /* Least Significant Byte */
+
+    /* metadata 3 to 6, timestamp trigger value */
+    /* TX state machine must be triggered at (T0 - lgw_i_tx_start_delay_us) for packet to start being emitted at T0 */
+    if (pkt_data.tx_mode == TIMESTAMPED)
+    {
+        count_trig = pkt_data.count_us - (uint32_t)tx_start_delay;
+        buff[3] = 0xFF & (count_trig >> 24);
+        buff[4] = 0xFF & (count_trig >> 16);
+        buff[5] = 0xFF & (count_trig >> 8);
+        buff[6] = 0xFF &  count_trig;
+    }
+
+    /* parameters depending on modulation  */
+    if (pkt_data.modulation == MOD_LORA) {
+        /* metadata 7, modulation type, radio chain selection and TX power */
+        buff[7] = (0x20 & (pkt_data.rf_chain << 5)) | (0x0F & pow_index); /* bit 4 is 0 -> LoRa modulation */
+
+        buff[8] = 0; /* metadata 8, not used */
+
+        /* metadata 9, CRC, LoRa CR & SF */
+        switch (pkt_data.datarate) {
+            case DR_LORA_SF7: buff[9] = 7; break;
+            case DR_LORA_SF8: buff[9] = 8; break;
+            case DR_LORA_SF9: buff[9] = 9; break;
+            case DR_LORA_SF10: buff[9] = 10; break;
+            case DR_LORA_SF11: buff[9] = 11; break;
+            case DR_LORA_SF12: buff[9] = 12; break;
+            default: DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", pkt_data.datarate);
+        }
+        switch (pkt_data.coderate) {
+            case CR_LORA_4_5: buff[9] |= 1 << 4; break;
+            case CR_LORA_4_6: buff[9] |= 2 << 4; break;
+            case CR_LORA_4_7: buff[9] |= 3 << 4; break;
+            case CR_LORA_4_8: buff[9] |= 4 << 4; break;
+            default: DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", pkt_data.coderate);
+        }
+        if (pkt_data.no_crc == false) {
+            buff[9] |= 0x80; /* set 'CRC enable' bit */
+        } else {
+            DEBUG_MSG("Info: packet will be sent without CRC\n");
+        }
+
+        /* metadata 10, payload size */
+        buff[10] = pkt_data.size;
+
+        /* metadata 11, implicit header, modulation bandwidth, PPM offset & polarity */
+        switch (pkt_data.bandwidth) {
+            case BW_125KHZ: buff[11] = 0; break;
+            case BW_250KHZ: buff[11] = 1; break;
+            case BW_500KHZ: buff[11] = 2; break;
+            default: DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", pkt_data.bandwidth);
+        }
+        if (pkt_data.no_header == true) {
+            buff[11] |= 0x04; /* set 'implicit header' bit */
+        }
+        if (SET_PPM_ON(pkt_data.bandwidth,pkt_data.datarate)) {
+            buff[11] |= 0x08; /* set 'PPM offset' bit at 1 */
+        }
+        if (pkt_data.invert_pol == true) {
+            buff[11] |= 0x10; /* set 'TX polarity' bit at 1 */
+        }
+
+        /* metadata 12 & 13, LoRa preamble size */
+        if (pkt_data.preamble == 0) { /* if not explicit, use recommended LoRa preamble size */
+            pkt_data.preamble = STD_LORA_PREAMBLE;
+        } else if (pkt_data.preamble < MIN_LORA_PREAMBLE) { /* enforce minimum preamble size */
+            pkt_data.preamble = MIN_LORA_PREAMBLE;
+            DEBUG_MSG("Note: preamble length adjusted to respect minimum LoRa preamble size\n");
+        }
+        buff[12] = 0xFF & (pkt_data.preamble >> 8);
+        buff[13] = 0xFF & pkt_data.preamble;
+
+        /* metadata 14 & 15, not used */
+        buff[14] = 0;
+        buff[15] = 0;
+
+        /* MSB of RF frequency is now used in AGC firmware to implement large/narrow filtering in SX1257/55 */
+        buff[0] &= 0x3F; /* Unset 2 MSBs of frequency code */
+        if (pkt_data.bandwidth == BW_500KHZ) {
+            buff[0] |= 0x80; /* Set MSB bit to enlarge analog filter for 500kHz BW */
+        }
+
+        /* Set MSB-1 bit to enable digital filter if required */
+        if (tx_notch_enable == true) {
+            DEBUG_MSG("INFO: Enabling TX notch filter\n");
+            buff[0] |= 0x40;
+        }
+    } else if (pkt_data.modulation == MOD_FSK) {
+        /* metadata 7, modulation type, radio chain selection and TX power */
+        buff[7] = (0x20 & (pkt_data.rf_chain << 5)) | 0x10 | (0x0F & pow_index); /* bit 4 is 1 -> FSK modulation */
+
+        buff[8] = 0; /* metadata 8, not used */
+
+        /* metadata 9, frequency deviation */
+        buff[9] = pkt_data.f_dev;
+
+        /* metadata 10, payload size */
+        buff[10] = pkt_data.size;
+        /* TODO: how to handle 255 bytes packets ?!? */
+
+        /* metadata 11, packet mode, CRC, encoding */
+        buff[11] = 0x01 | (pkt_data.no_crc?0:0x02) | (0x02 << 2); /* always in variable length packet mode, whitening, and CCITT CRC if CRC is not disabled  */
+
+        /* metadata 12 & 13, FSK preamble size */
+        if (pkt_data.preamble == 0) { /* if not explicit, use LoRa MAC preamble size */
+            pkt_data.preamble = STD_FSK_PREAMBLE;
+        } else if (pkt_data.preamble < MIN_FSK_PREAMBLE) { /* enforce minimum preamble size */
+            pkt_data.preamble = MIN_FSK_PREAMBLE;
+            DEBUG_MSG("Note: preamble length adjusted to respect minimum FSK preamble size\n");
+        }
+        buff[12] = 0xFF & (pkt_data.preamble >> 8);
+        buff[13] = 0xFF & pkt_data.preamble;
+
+        /* metadata 14 & 15, FSK baudrate */
+        fsk_dr_div = (uint16_t)((uint32_t)LGW_XTAL_FREQU / pkt_data.datarate); /* Ok for datarate between 500bps and 250kbps */
+        buff[14] = 0xFF & (fsk_dr_div >> 8);
+        buff[15] = 0xFF & fsk_dr_div;
+
+        /* insert payload size in the packet for variable mode */
+        buff[16] = pkt_data.size;
+        ++transfer_size; /* one more byte to transfer to the TX modem */
+        ++payload_offset; /* start the payload with one more byte of offset */
+
+        /* MSB of RF frequency is now used in AGC firmware to implement large/narrow filtering in SX1257/55 */
+        buff[0] &= 0x7F; /* Always use narrow band for FSK (force MSB to 0) */
+
+    } else {
+        DEBUG_MSG("ERROR: INVALID TX MODULATION..\n");
+        return LGW_HAL_ERROR;
+    }
+
+    /* Configure TX start delay based on TX notch filter */
+    lgw_reg_w(LGW_TX_START_DELAY, tx_start_delay);
+
+    /* copy payload from user struct to buffer containing metadata */
+    memcpy((void *)(buff + payload_offset), (void *)(pkt_data.payload), pkt_data.size);
+
+    /* reset TX command flags */
+    lgw_abort_tx();
+
+    /* put metadata + payload in the TX data buffer */
+    lgw_reg_w(LGW_TX_DATA_BUF_ADDR, 0);
+    lgw_reg_wb(LGW_TX_DATA_BUF_DATA, buff, transfer_size);
+    DEBUG_ARRAY(i, transfer_size, buff);
+
+    x = lbt_is_channel_free(&pkt_data, tx_start_delay, &tx_allowed);
+    if (x != LGW_LBT_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to check channel availability for TX\n");
+        return LGW_HAL_ERROR;
+    }
+    if (tx_allowed == true) {
+        switch(pkt_data.tx_mode) {
+            case IMMEDIATE:
+                lgw_reg_w(LGW_TX_TRIG_IMMEDIATE, 1);
+                break;
+
+            case TIMESTAMPED:
+                lgw_reg_w(LGW_TX_TRIG_DELAYED, 1);
+                break;
+
+            case ON_GPS:
+                lgw_reg_w(LGW_TX_TRIG_GPS, 1);
+                break;
+
+            default:
+                DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", pkt_data.tx_mode);
+                return LGW_HAL_ERROR;
+        }
+    } else {
+        DEBUG_MSG("ERROR: Cannot send packet, channel is busy (LBT)\n");
+        return LGW_LBT_ISSUE;
+    }
+
+    return LGW_HAL_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_status(uint8_t select, uint8_t *code) {
+    int32_t read_value;
+
+    /* check input variables */
+    CHECK_NULL(code);
+
+    if (select == TX_STATUS) {
+        lgw_reg_r(LGW_TX_STATUS, &read_value);
+        if (lgw_is_started == false) {
+            *code = TX_OFF;
+        } else if ((read_value & 0x10) == 0) { /* bit 4 @1: TX programmed */
+            *code = TX_FREE;
+        } else if ((read_value & 0x60) != 0) { /* bit 5 or 6 @1: TX sequence */
+            *code = TX_EMITTING;
+        } else {
+            *code = TX_SCHEDULED;
+        }
+        return LGW_HAL_SUCCESS;
+
+    } else if (select == RX_STATUS) {
+        *code = RX_STATUS_UNKNOWN; /* todo */
+        return LGW_HAL_SUCCESS;
+
+    } else {
+        DEBUG_MSG("ERROR: SELECTION INVALID, NO STATUS TO RETURN\n");
+        return LGW_HAL_ERROR;
+    }
+
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_abort_tx(void) {
+    int i;
+
+    i = lgw_reg_w(LGW_TX_TRIG_ALL, 0);
+
+    if (i == LGW_REG_SUCCESS) return LGW_HAL_SUCCESS;
+    else return LGW_HAL_ERROR;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_get_trigcnt(uint32_t* trig_cnt_us) {
+    int i;
+    int32_t val;
+
+    i = lgw_reg_r(LGW_TIMESTAMP, &val);
+    if (i == LGW_REG_SUCCESS) {
+        *trig_cnt_us = (uint32_t)val;
+        return LGW_HAL_SUCCESS;
+    } else {
+        return LGW_HAL_ERROR;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+const char* lgw_version_info() {
+    return lgw_version_string;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+uint32_t lgw_time_on_air(struct lgw_pkt_tx_s *packet) {
+    int32_t val;
+    uint8_t SF, H, DE;
+    uint16_t BW;
+    uint32_t payloadSymbNb, Tpacket;
+    double Tsym, Tpreamble, Tpayload, Tfsk;
+
+    if (packet == NULL) {
+        DEBUG_MSG("ERROR: Failed to compute time on air, wrong parameter\n");
+        return 0;
+    }
+
+    if (packet->modulation == MOD_LORA) {
+        /* Get bandwidth */
+        val = lgw_bw_getval(packet->bandwidth);
+        if (val != -1) {
+            BW = (uint16_t)(val / 1E3);
+        } else {
+            DEBUG_PRINTF("ERROR: Cannot compute time on air for this packet, unsupported bandwidth (0x%02X)\n", packet->bandwidth);
+            return 0;
+        }
+
+        /* Get datarate */
+        val = lgw_sf_getval(packet->datarate);
+        if (val != -1) {
+            SF = (uint8_t)val;
+        } else {
+            DEBUG_PRINTF("ERROR: Cannot compute time on air for this packet, unsupported datarate (0x%02X)\n", packet->datarate);
+            return 0;
+        }
+
+        /* Duration of 1 symbol */
+        Tsym = pow(2, SF) / BW;
+
+        /* Duration of preamble */
+        Tpreamble = ((double)(packet->preamble) + 4.25) * Tsym;
+
+        /* Duration of payload */
+        H = (packet->no_header==false) ? 0 : 1; /* header is always enabled, except for beacons */
+        DE = (SF >= 11) ? 1 : 0; /* Low datarate optimization enabled for SF11 and SF12 */
+
+        payloadSymbNb = 8 + (ceil((double)(8*packet->size - 4*SF + 28 + 16 - 20*H) / (double)(4*(SF - 2*DE))) * (packet->coderate + 4)); /* Explicitely cast to double to keep precision of the division */
+
+        Tpayload = payloadSymbNb * Tsym;
+
+        /* Duration of packet */
+        Tpacket = Tpreamble + Tpayload;
+    } else if (packet->modulation == MOD_FSK) {
+        /* PREAMBLE + SYNC_WORD + PKT_LEN + PKT_PAYLOAD + CRC
+                PREAMBLE: default 5 bytes
+                SYNC_WORD: default 3 bytes
+                PKT_LEN: 1 byte (variable length mode)
+                PKT_PAYLOAD: x bytes
+                CRC: 0 or 2 bytes
+        */
+        Tfsk = (8 * (double)(packet->preamble + fsk_sync_word_size + 1 + packet->size + ((packet->no_crc == true) ? 0 : 2)) / (double)packet->datarate) * 1E3;
+
+        /* Duration of packet */
+        Tpacket = (uint32_t)Tfsk + 1; /* add margin for rounding */
+    } else {
+        Tpacket = 0;
+        DEBUG_PRINTF("ERROR: Cannot compute time on air for this packet, unsupported modulation (0x%02X)\n", packet->modulation);
+    }
+
+    return Tpacket;
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_lbt.c b/libloragw/src/loragw_lbt.c
new file mode 100644
index 0000000..9c43521
--- /dev/null
+++ b/libloragw/src/loragw_lbt.c
@@ -0,0 +1,391 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Functions used to handle the Listen Before Talk feature
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Michael Coracin
+*/
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+#include <stdlib.h>     /* abs, labs, llabs */
+#include <string.h>     /* memset */
+
+#include "loragw_radio.h"
+#include "loragw_aux.h"
+#include "loragw_lbt.h"
+#include "loragw_fpga.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_LBT == 1
+    #define DEBUG_MSG(str)              fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)  fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define CHECK_NULL(a)               if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_REG_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define CHECK_NULL(a)               if(a==NULL){return LGW_REG_ERROR;}
+#endif
+
+#define LBT_TIMESTAMP_MASK  0x007FF000 /* 11-bits timestamp */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE TYPES -------------------------------------------------------- */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+/* -------------------------------------------------------------------------- */
+/* --- INTERNAL SHARED VARIABLES -------------------------------------------- */
+
+extern void *lgw_spi_target; /*! generic pointer to the SPI device */
+extern uint8_t lgw_spi_mux_mode; /*! current SPI mux mode used */
+extern uint16_t lgw_i_tx_start_delay_us;
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+static bool lbt_enable;
+static uint8_t lbt_nb_active_channel;
+static int8_t lbt_rssi_target_dBm;
+static int8_t lbt_rssi_offset_dB;
+static uint32_t lbt_start_freq;
+static struct lgw_conf_lbt_chan_s lbt_channel_cfg[LBT_CHANNEL_FREQ_NB];
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS ---------------------------------------------------- */
+
+bool is_equal_freq(uint32_t a, uint32_t b);
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+int lbt_setconf(struct lgw_conf_lbt_s * conf) {
+    int i;
+
+    /* Check input parameters */
+    if (conf == NULL) {
+        return LGW_LBT_ERROR;
+    }
+    if ((conf->nb_channel < 1) || (conf->nb_channel > LBT_CHANNEL_FREQ_NB)) {
+        DEBUG_PRINTF("ERROR: Number of defined LBT channels is out of range (%u)\n", conf->nb_channel);
+        return LGW_LBT_ERROR;
+    }
+
+    /* Initialize LBT channels configuration */
+    memset(lbt_channel_cfg, 0, sizeof lbt_channel_cfg);
+
+    /* Set internal LBT config according to parameters */
+    lbt_enable = conf->enable;
+    lbt_nb_active_channel = conf->nb_channel;
+    lbt_rssi_target_dBm = conf->rssi_target;
+    lbt_rssi_offset_dB = conf->rssi_offset;
+
+    for (i=0; i<lbt_nb_active_channel; i++) {
+        lbt_channel_cfg[i].freq_hz = conf->channels[i].freq_hz;
+        lbt_channel_cfg[i].scan_time_us = conf->channels[i].scan_time_us;
+    }
+
+    return LGW_LBT_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lbt_setup(void) {
+    int x, i;
+    int32_t val;
+    uint32_t freq_offset;
+
+    /* Check if LBT feature is supported by FPGA */
+    x = lgw_fpga_reg_r(LGW_FPGA_FEATURE, &val);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to read FPGA Features register\n");
+        return LGW_LBT_ERROR;
+    }
+    if (TAKE_N_BITS_FROM((uint8_t)val, 2, 1) != 1) {
+        DEBUG_MSG("ERROR: No support for LBT in FPGA\n");
+        return LGW_LBT_ERROR;
+    }
+
+    /* Get FPGA lowest frequency for LBT channels */
+    x = lgw_fpga_reg_r(LGW_FPGA_LBT_INITIAL_FREQ, &val);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to read LBT initial frequency from FPGA\n");
+        return LGW_LBT_ERROR;
+    }
+    switch(val) {
+        case 0:
+            lbt_start_freq = 915000000;
+            break;
+        case 1:
+            lbt_start_freq = 863000000;
+            break;
+        default:
+            DEBUG_PRINTF("ERROR: LBT start frequency %d is not supported\n", val);
+            return LGW_LBT_ERROR;
+    }
+
+    /* Configure SX127x for FSK */
+    x = lgw_setup_sx127x(lbt_start_freq, MOD_FSK, LGW_SX127X_RXBW_100K_HZ, lbt_rssi_offset_dB); /* 200KHz LBT channels */
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure SX127x for LBT\n");
+        return LGW_LBT_ERROR;
+    }
+
+    /* Configure FPGA for LBT */
+    val = -2*lbt_rssi_target_dBm; /* Convert RSSI target in dBm to FPGA register format */
+    x = lgw_fpga_reg_w(LGW_FPGA_RSSI_TARGET, val);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure FPGA for LBT\n");
+        return LGW_LBT_ERROR;
+    }
+    /* Set default values for non-active LBT channels */
+    for (i=lbt_nb_active_channel; i<LBT_CHANNEL_FREQ_NB; i++) {
+        lbt_channel_cfg[i].freq_hz = lbt_start_freq;
+        lbt_channel_cfg[i].scan_time_us = 128; /* fastest scan for non-active channels */
+    }
+    /* Configure FPGA for both active and non-active LBT channels */
+    for (i=0; i<LBT_CHANNEL_FREQ_NB; i++) {
+        /* Check input parameters */
+        if (lbt_channel_cfg[i].freq_hz < lbt_start_freq) {
+            DEBUG_PRINTF("ERROR: LBT channel frequency is out of range (%u)\n", lbt_channel_cfg[i].freq_hz);
+            return LGW_LBT_ERROR;
+        }
+        if ((lbt_channel_cfg[i].scan_time_us != 128) && (lbt_channel_cfg[i].scan_time_us != 5000)) {
+            DEBUG_PRINTF("ERROR: LBT channel scan time is not supported (%u)\n", lbt_channel_cfg[i].scan_time_us);
+            return LGW_LBT_ERROR;
+        }
+        /* Configure */
+        freq_offset = (lbt_channel_cfg[i].freq_hz - lbt_start_freq) / 100E3; /* 100kHz unit */
+        x = lgw_fpga_reg_w(LGW_FPGA_LBT_CH0_FREQ_OFFSET+i, (int32_t)freq_offset);
+        if (x != LGW_REG_SUCCESS) {
+            DEBUG_PRINTF("ERROR: Failed to configure FPGA for LBT channel %d (freq offset)\n", i);
+            return LGW_LBT_ERROR;
+        }
+        if (lbt_channel_cfg[i].scan_time_us == 5000) { /* configured to 128 by default */
+            x = lgw_fpga_reg_w(LGW_FPGA_LBT_SCAN_TIME_CH0+i, 1);
+            if (x != LGW_REG_SUCCESS) {
+                DEBUG_PRINTF("ERROR: Failed to configure FPGA for LBT channel %d (freq offset)\n", i);
+                return LGW_LBT_ERROR;
+            }
+        }
+    }
+
+    DEBUG_MSG("Note: LBT configuration:\n");
+    DEBUG_PRINTF("\tlbt_enable: %d\n", lbt_enable );
+    DEBUG_PRINTF("\tlbt_nb_active_channel: %d\n", lbt_nb_active_channel );
+    DEBUG_PRINTF("\tlbt_start_freq: %d\n", lbt_start_freq);
+    DEBUG_PRINTF("\tlbt_rssi_target: %d\n", lbt_rssi_target_dBm );
+    for (i=0; i<LBT_CHANNEL_FREQ_NB; i++) {
+        DEBUG_PRINTF("\tlbt_channel_cfg[%d].freq_hz: %u\n", i, lbt_channel_cfg[i].freq_hz );
+        DEBUG_PRINTF("\tlbt_channel_cfg[%d].scan_time_us: %u\n", i, lbt_channel_cfg[i].scan_time_us );
+    }
+
+    return LGW_LBT_SUCCESS;
+
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lbt_start(void) {
+    int x;
+
+    x = lgw_fpga_reg_w(LGW_FPGA_CTRL_FEATURE_START, 1);
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to start LBT FSM\n");
+        return LGW_LBT_ERROR;
+    }
+
+    return LGW_LBT_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lbt_is_channel_free(struct lgw_pkt_tx_s * pkt_data, uint16_t tx_start_delay, bool * tx_allowed) {
+    int i;
+    int32_t val;
+    uint32_t tx_start_time = 0;
+    uint32_t tx_end_time = 0;
+    uint32_t delta_time = 0;
+    uint32_t sx1301_time = 0;
+    uint32_t lbt_time = 0;
+    uint32_t lbt_time1 = 0;
+    uint32_t lbt_time2 = 0;
+    uint32_t tx_max_time = 0;
+    int lbt_channel_decod_1 = -1;
+    int lbt_channel_decod_2 = -1;
+    uint32_t packet_duration = 0;
+
+    /* Check input parameters */
+    if ((pkt_data == NULL) || (tx_allowed == NULL)) {
+        return LGW_LBT_ERROR;
+    }
+
+    /* Check if TX is allowed */
+    if (lbt_enable == true) {
+        /* TX allowed for LoRa only */
+        if (pkt_data->modulation != MOD_LORA) {
+            *tx_allowed = false;
+            DEBUG_PRINTF("INFO: TX is not allowed for this modulation (%x)\n", pkt_data->modulation);
+            return LGW_LBT_SUCCESS;
+        }
+
+        /* Get SX1301 time at last PPS */
+        lgw_get_trigcnt(&sx1301_time);
+
+        DEBUG_MSG("################################\n");
+        switch(pkt_data->tx_mode) {
+            case TIMESTAMPED:
+                DEBUG_MSG("tx_mode                    = TIMESTAMPED\n");
+                tx_start_time = pkt_data->count_us & LBT_TIMESTAMP_MASK;
+                break;
+            case ON_GPS:
+                DEBUG_MSG("tx_mode                    = ON_GPS\n");
+                tx_start_time = (sx1301_time + (uint32_t)tx_start_delay + 1000000) & LBT_TIMESTAMP_MASK;
+                break;
+            case IMMEDIATE:
+                DEBUG_MSG("ERROR: tx_mode IMMEDIATE is not supported when LBT is enabled\n");
+                /* FALLTHROUGH  */
+            default:
+                return LGW_LBT_ERROR;
+        }
+
+        /* Select LBT Channel corresponding to required TX frequency */
+        lbt_channel_decod_1 = -1;
+        lbt_channel_decod_2 = -1;
+        if (pkt_data->bandwidth == BW_125KHZ) {
+            for (i=0; i<lbt_nb_active_channel; i++) {
+                if (is_equal_freq(pkt_data->freq_hz, lbt_channel_cfg[i].freq_hz) == true) {
+                    DEBUG_PRINTF("LBT: select channel %d (%u Hz)\n", i, lbt_channel_cfg[i].freq_hz);
+                    lbt_channel_decod_1 = i;
+                    lbt_channel_decod_2 = i;
+                    if (lbt_channel_cfg[i].scan_time_us == 5000) {
+                        tx_max_time = 4000000; /* 4 seconds */
+                    } else { /* scan_time_us = 128 */
+                        tx_max_time = 400000; /* 400 milliseconds */
+                    }
+                    break;
+                }
+            }
+        } else if (pkt_data->bandwidth == BW_250KHZ) {
+            /* In case of 250KHz, the TX freq has to be in between 2 consecutive channels of 200KHz BW.
+                The TX can only be over 2 channels, not more */
+            for (i=0; i<(lbt_nb_active_channel-1); i++) {
+                if ((is_equal_freq(pkt_data->freq_hz, (lbt_channel_cfg[i].freq_hz+lbt_channel_cfg[i+1].freq_hz)/2) == true) && ((lbt_channel_cfg[i+1].freq_hz-lbt_channel_cfg[i].freq_hz)==200E3)) {
+                    DEBUG_PRINTF("LBT: select channels %d,%d (%u Hz)\n", i, i+1, (lbt_channel_cfg[i].freq_hz+lbt_channel_cfg[i+1].freq_hz)/2);
+                    lbt_channel_decod_1 = i;
+                    lbt_channel_decod_2 = i+1;
+                    if (lbt_channel_cfg[i].scan_time_us == 5000) {
+                        tx_max_time = 4000000; /* 4 seconds */
+                    } else { /* scan_time_us = 128 */
+                        tx_max_time = 200000; /* 200 milliseconds */
+                    }
+                    break;
+                }
+            }
+        } else {
+            /* Nothing to do for now */
+        }
+
+        /* Get last time when selected channel was free */
+        if ((lbt_channel_decod_1 >= 0) && (lbt_channel_decod_2 >= 0)) {
+            lgw_fpga_reg_w(LGW_FPGA_LBT_TIMESTAMP_SELECT_CH, (int32_t)lbt_channel_decod_1);
+            lgw_fpga_reg_r(LGW_FPGA_LBT_TIMESTAMP_CH, &val);
+            lbt_time = lbt_time1 = (uint32_t)(val & 0x0000FFFF) * 256; /* 16bits (1LSB = 256µs) */
+
+            if (lbt_channel_decod_1 != lbt_channel_decod_2 ) {
+                lgw_fpga_reg_w(LGW_FPGA_LBT_TIMESTAMP_SELECT_CH, (int32_t)lbt_channel_decod_2);
+                lgw_fpga_reg_r(LGW_FPGA_LBT_TIMESTAMP_CH, &val);
+                lbt_time2 = (uint32_t)(val & 0x0000FFFF) * 256; /* 16bits (1LSB = 256µs) */
+
+                if (lbt_time2 < lbt_time1) {
+                    lbt_time = lbt_time2;
+                }
+            }
+        } else {
+            lbt_time = 0;
+        }
+
+        packet_duration = lgw_time_on_air(pkt_data) * 1000UL;
+        tx_end_time = (tx_start_time + packet_duration) & LBT_TIMESTAMP_MASK;
+        if (lbt_time < tx_end_time) {
+            delta_time = tx_end_time - lbt_time;
+        } else {
+            /* It means LBT counter has wrapped */
+            printf("LBT: lbt counter has wrapped\n");
+            delta_time = (LBT_TIMESTAMP_MASK - lbt_time) + tx_end_time;
+        }
+
+        DEBUG_PRINTF("sx1301_time                = %u\n", sx1301_time & LBT_TIMESTAMP_MASK);
+        DEBUG_PRINTF("tx_freq                    = %u\n", pkt_data->freq_hz);
+        DEBUG_MSG("------------------------------------------------\n");
+        DEBUG_PRINTF("packet_duration            = %u\n", packet_duration);
+        DEBUG_PRINTF("tx_start_time              = %u\n", tx_start_time);
+        DEBUG_PRINTF("lbt_time1                  = %u\n", lbt_time1);
+        DEBUG_PRINTF("lbt_time2                  = %u\n", lbt_time2);
+        DEBUG_PRINTF("lbt_time                   = %u\n", lbt_time);
+        DEBUG_PRINTF("delta_time                 = %u\n", delta_time);
+        DEBUG_MSG("------------------------------------------------\n");
+
+        /* send data if allowed */
+        /* lbt_time: last time when channel was free */
+        /* tx_max_time: maximum time allowed to send packet since last free time */
+        /* 2048: some margin */
+        if ((delta_time < (tx_max_time - 2048)) && (lbt_time != 0)) {
+            *tx_allowed = true;
+        } else {
+            DEBUG_MSG("ERROR: TX request rejected (LBT)\n");
+            *tx_allowed = false;
+        }
+    } else {
+        /* Always allow if LBT is disabled */
+        *tx_allowed = true;
+    }
+
+    return LGW_LBT_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+bool lbt_is_enabled(void) {
+    return lbt_enable;
+}
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
+
+/* As given frequencies have been converted from float to integer, some aliasing
+issues can appear, so we can't simply check for equality, but have to take some
+margin */
+bool is_equal_freq(uint32_t a, uint32_t b) {
+    int64_t diff;
+    int64_t a64 = (int64_t)a;
+    int64_t b64 = (int64_t)b;
+
+    /* Calculate the difference */
+    diff = llabs(a64 - b64);
+
+    /* Check for acceptable diff range */
+    if( diff <= 10000 )
+    {
+        return true;
+    }
+
+    return false;
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_radio.c b/libloragw/src/loragw_radio.c
new file mode 100644
index 0000000..b3046a9
--- /dev/null
+++ b/libloragw/src/loragw_radio.c
@@ -0,0 +1,562 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Functions used to handle LoRa concentrator radios.
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Michael Coracin
+*/
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+
+#include "loragw_sx125x.h"
+#include "loragw_sx1272_fsk.h"
+#include "loragw_sx1272_lora.h"
+#include "loragw_sx1276_fsk.h"
+#include "loragw_sx1276_lora.h"
+#include "loragw_spi.h"
+#include "loragw_aux.h"
+#include "loragw_reg.h"
+#include "loragw_hal.h"
+#include "loragw_radio.h"
+#include "loragw_fpga.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_REG == 1
+    #define DEBUG_MSG(str)              fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)  fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define CHECK_NULL(a)               if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_REG_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define CHECK_NULL(a)               if(a==NULL){return LGW_REG_ERROR;}
+#endif
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE TYPES -------------------------------------------------------- */
+
+/**
+@struct lgw_radio_FSK_bandwidth_s
+@brief Associate a bandwidth in kHz with its corresponding register values
+*/
+struct lgw_sx127x_FSK_bandwidth_s {
+    uint32_t    RxBwKHz;
+    uint8_t     RxBwMant;
+    uint8_t     RxBwExp;
+};
+
+/**
+@struct lgw_radio_type_version_s
+@brief Associate a radio type with its corresponding expected version value
+        read in the radio version register.
+*/
+struct lgw_radio_type_version_s {
+    enum lgw_radio_type_e type;
+    uint8_t reg_version;
+};
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define PLL_LOCK_MAX_ATTEMPTS 5
+
+const struct lgw_sx127x_FSK_bandwidth_s sx127x_FskBandwidths[] =
+{
+    { 2600  , 2, 7 },   /* LGW_SX127X_RXBW_2K6_HZ */
+    { 3100  , 1, 7 },   /* LGW_SX127X_RXBW_3K1_HZ */
+    { 3900  , 0, 7 },   /* ... */
+    { 5200  , 2, 6 },
+    { 6300  , 1, 6 },
+    { 7800  , 0, 6 },
+    { 10400 , 2, 5 },
+    { 12500 , 1, 5 },
+    { 15600 , 0, 5 },
+    { 20800 , 2, 4 },
+    { 25000 , 1, 4 },   /* ... */
+    { 31300 , 0, 4 },
+    { 41700 , 2, 3 },
+    { 50000 , 1, 3 },
+    { 62500 , 0, 3 },
+    { 83333 , 2, 2 },
+    { 100000, 1, 2 },
+    { 125000, 0, 2 },
+    { 166700, 2, 1 },
+    { 200000, 1, 1 },   /* ... */
+    { 250000, 0, 1 }    /* LGW_SX127X_RXBW_250K_HZ */
+};
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+extern void *lgw_spi_target; /*! generic pointer to the SPI device */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS ---------------------------------------------------- */
+
+void sx125x_write(uint8_t channel, uint8_t addr, uint8_t data);
+uint8_t sx125x_read(uint8_t channel, uint8_t addr);
+
+int setup_sx1272_FSK(uint32_t frequency, enum lgw_sx127x_rxbw_e rxbw_khz, int8_t rssi_offset);
+int setup_sx1276_FSK(uint32_t frequency, enum lgw_sx127x_rxbw_e rxbw_khz, int8_t rssi_offset);
+
+int reset_sx127x(enum lgw_radio_type_e radio_type);
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
+
+void sx125x_write(uint8_t channel, uint8_t addr, uint8_t data) {
+    int reg_add, reg_dat, reg_cs;
+
+    /* checking input parameters */
+    if (channel >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: INVALID RF_CHAIN\n");
+        return;
+    }
+    if (addr >= 0x7F) {
+        DEBUG_MSG("ERROR: ADDRESS OUT OF RANGE\n");
+        return;
+    }
+
+    /* selecting the target radio */
+    switch (channel) {
+        case 0:
+            reg_add = LGW_SPI_RADIO_A__ADDR;
+            reg_dat = LGW_SPI_RADIO_A__DATA;
+            reg_cs  = LGW_SPI_RADIO_A__CS;
+            break;
+
+        case 1:
+            reg_add = LGW_SPI_RADIO_B__ADDR;
+            reg_dat = LGW_SPI_RADIO_B__DATA;
+            reg_cs  = LGW_SPI_RADIO_B__CS;
+            break;
+
+        default:
+            DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", channel);
+            return;
+    }
+
+    /* SPI master data write procedure */
+    lgw_reg_w(reg_cs, 0);
+    lgw_reg_w(reg_add, 0x80 | addr); /* MSB at 1 for write operation */
+    lgw_reg_w(reg_dat, data);
+    lgw_reg_w(reg_cs, 1);
+    lgw_reg_w(reg_cs, 0);
+
+    return;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+uint8_t sx125x_read(uint8_t channel, uint8_t addr) {
+    int reg_add, reg_dat, reg_cs, reg_rb;
+    int32_t read_value;
+
+    /* checking input parameters */
+    if (channel >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: INVALID RF_CHAIN\n");
+        return 0;
+    }
+    if (addr >= 0x7F) {
+        DEBUG_MSG("ERROR: ADDRESS OUT OF RANGE\n");
+        return 0;
+    }
+
+    /* selecting the target radio */
+    switch (channel) {
+        case 0:
+            reg_add = LGW_SPI_RADIO_A__ADDR;
+            reg_dat = LGW_SPI_RADIO_A__DATA;
+            reg_cs  = LGW_SPI_RADIO_A__CS;
+            reg_rb  = LGW_SPI_RADIO_A__DATA_READBACK;
+            break;
+
+        case 1:
+            reg_add = LGW_SPI_RADIO_B__ADDR;
+            reg_dat = LGW_SPI_RADIO_B__DATA;
+            reg_cs  = LGW_SPI_RADIO_B__CS;
+            reg_rb  = LGW_SPI_RADIO_B__DATA_READBACK;
+            break;
+
+        default:
+            DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d IN SWITCH STATEMENT\n", channel);
+            return 0;
+    }
+
+    /* SPI master data read procedure */
+    lgw_reg_w(reg_cs, 0);
+    lgw_reg_w(reg_add, addr); /* MSB at 0 for read operation */
+    lgw_reg_w(reg_dat, 0);
+    lgw_reg_w(reg_cs, 1);
+    lgw_reg_w(reg_cs, 0);
+    lgw_reg_r(reg_rb, &read_value);
+
+    return (uint8_t)read_value;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int setup_sx1272_FSK(uint32_t frequency, enum lgw_sx127x_rxbw_e rxbw_khz, int8_t rssi_offset) {
+    uint64_t freq_reg;
+    uint8_t ModulationShaping = 0;
+    uint8_t PllHop = 1;
+    uint8_t LnaGain = 1;
+    uint8_t LnaBoost = 3;
+    uint8_t AdcBwAuto = 0;
+    uint8_t AdcBw = 7;
+    uint8_t AdcLowPwr = 0;
+    uint8_t AdcTrim = 6;
+    uint8_t AdcTest = 0;
+    uint8_t RxBwExp = sx127x_FskBandwidths[rxbw_khz].RxBwExp;
+    uint8_t RxBwMant = sx127x_FskBandwidths[rxbw_khz].RxBwMant;
+    uint8_t RssiSmoothing = 5;
+    uint8_t RssiOffsetReg;
+    uint8_t reg_val;
+    int x;
+
+    /* Set in FSK mode */
+    x = lgw_sx127x_reg_w(SX1272_REG_OPMODE, 0);
+    wait_ms(100);
+    x |= lgw_sx127x_reg_w(SX1272_REG_OPMODE, 0 | (ModulationShaping << 3)); /* Sleep mode, no FSK shaping */
+    wait_ms(100);
+    x |= lgw_sx127x_reg_w(SX1272_REG_OPMODE, 1 | (ModulationShaping << 3)); /* Standby mode, no FSK shaping */
+    wait_ms(100);
+
+    /* Set RF carrier frequency */
+    x |= lgw_sx127x_reg_w(SX1272_REG_PLLHOP, PllHop << 7);
+    freq_reg = ((uint64_t)frequency << 19) / (uint64_t)32000000;
+    x |= lgw_sx127x_reg_w(SX1272_REG_FRFMSB, (freq_reg >> 16) & 0xFF);
+    x |= lgw_sx127x_reg_w(SX1272_REG_FRFMID, (freq_reg >> 8) & 0xFF);
+    x |= lgw_sx127x_reg_w(SX1272_REG_FRFLSB, (freq_reg >> 0) & 0xFF);
+
+    /* Config */
+    x |= lgw_sx127x_reg_w(SX1272_REG_LNA, LnaBoost | (LnaGain << 5)); /* Improved sensitivity, highest gain */
+    x |= lgw_sx127x_reg_w(0x68, AdcBw | (AdcBwAuto << 3));
+    x |= lgw_sx127x_reg_w(0x69, AdcTest | (AdcTrim << 4) | (AdcLowPwr << 7));
+
+    /* set BR and FDEV for 200 kHz bandwidth*/
+    x |= lgw_sx127x_reg_w(SX1272_REG_BITRATEMSB, 125);
+    x |= lgw_sx127x_reg_w(SX1272_REG_BITRATELSB, 0);
+    x |= lgw_sx127x_reg_w(SX1272_REG_FDEVMSB, 2);
+    x |= lgw_sx127x_reg_w(SX1272_REG_FDEVLSB, 225);
+
+    /* Config continues... */
+    x |= lgw_sx127x_reg_w(SX1272_REG_RXCONFIG, 0); /* Disable AGC */
+    RssiOffsetReg = (rssi_offset >= 0) ? (uint8_t)rssi_offset : (uint8_t)(~(-rssi_offset)+1); /* 2's complement */
+    x |= lgw_sx127x_reg_w(SX1272_REG_RSSICONFIG, RssiSmoothing | (RssiOffsetReg << 3)); /* Set RSSI smoothing to 64 samples, RSSI offset to given value */
+    x |= lgw_sx127x_reg_w(SX1272_REG_RXBW, RxBwExp | (RxBwMant << 3));
+    x |= lgw_sx127x_reg_w(SX1272_REG_RXDELAY, 2);
+    x |= lgw_sx127x_reg_w(SX1272_REG_PLL, 0x10); /* PLL BW set to 75 KHz */
+    x |= lgw_sx127x_reg_w(0x47, 1); /* optimize PLL start-up time */
+
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure SX1272\n");
+        return x;
+    }
+
+    /* set Rx continuous mode */
+    x = lgw_sx127x_reg_w(SX1272_REG_OPMODE, 5 | (ModulationShaping << 3)); /* Receiver Mode, no FSK shaping */
+    wait_ms(500);
+    x |= lgw_sx127x_reg_r(SX1272_REG_IRQFLAGS1, &reg_val);
+    /* Check if RxReady and ModeReady */
+    if ((TAKE_N_BITS_FROM(reg_val, 6, 1) == 0) || (TAKE_N_BITS_FROM(reg_val, 7, 1) == 0) || (x != LGW_REG_SUCCESS)) {
+        DEBUG_MSG("ERROR: SX1272 failed to enter RX continuous mode\n");
+        return LGW_REG_ERROR;
+    }
+    wait_ms(500);
+
+    DEBUG_PRINTF("INFO: Successfully configured SX1272 for FSK modulation (rxbw=%d)\n", rxbw_khz);
+
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int setup_sx1276_FSK(uint32_t frequency, enum lgw_sx127x_rxbw_e rxbw_khz, int8_t rssi_offset) {
+    uint64_t freq_reg;
+    uint8_t ModulationShaping = 0;
+    uint8_t PllHop = 1;
+    uint8_t LnaGain = 1;
+    uint8_t LnaBoost = 3;
+    uint8_t AdcBwAuto = 0;
+    uint8_t AdcBw = 7;
+    uint8_t AdcLowPwr = 0;
+    uint8_t AdcTrim = 6;
+    uint8_t AdcTest = 0;
+    uint8_t RxBwExp = sx127x_FskBandwidths[rxbw_khz].RxBwExp;
+    uint8_t RxBwMant = sx127x_FskBandwidths[rxbw_khz].RxBwMant;
+    uint8_t RssiSmoothing = 5;
+    uint8_t RssiOffsetReg;
+    uint8_t reg_val;
+    int x;
+
+    /* Set in FSK mode */
+    x = lgw_sx127x_reg_w(SX1276_REG_OPMODE, 0);
+    wait_ms(100);
+    x |= lgw_sx127x_reg_w(SX1276_REG_OPMODE, 0 | (ModulationShaping << 3)); /* Sleep mode, no FSK shaping */
+    wait_ms(100);
+    x |= lgw_sx127x_reg_w(SX1276_REG_OPMODE, 1 | (ModulationShaping << 3)); /* Standby mode, no FSK shaping */
+    wait_ms(100);
+
+    /* Set RF carrier frequency */
+    x |= lgw_sx127x_reg_w(SX1276_REG_PLLHOP, PllHop << 7);
+    freq_reg = ((uint64_t)frequency << 19) / (uint64_t)32000000;
+    x |= lgw_sx127x_reg_w(SX1276_REG_FRFMSB, (freq_reg >> 16) & 0xFF);
+    x |= lgw_sx127x_reg_w(SX1276_REG_FRFMID, (freq_reg >> 8) & 0xFF);
+    x |= lgw_sx127x_reg_w(SX1276_REG_FRFLSB, (freq_reg >> 0) & 0xFF);
+
+    /* Config */
+    x |= lgw_sx127x_reg_w(SX1276_REG_LNA, LnaBoost | (LnaGain << 5)); /* Improved sensitivity, highest gain */
+    x |= lgw_sx127x_reg_w(0x57, AdcBw | (AdcBwAuto << 3));
+    x |= lgw_sx127x_reg_w(0x58, AdcTest | (AdcTrim << 4) | (AdcLowPwr << 7));
+
+    /* set BR and FDEV for 200 kHz bandwidth*/
+    x |= lgw_sx127x_reg_w(SX1276_REG_BITRATEMSB, 125);
+    x |= lgw_sx127x_reg_w(SX1276_REG_BITRATELSB, 0);
+    x |= lgw_sx127x_reg_w(SX1276_REG_FDEVMSB, 2);
+    x |= lgw_sx127x_reg_w(SX1276_REG_FDEVLSB, 225);
+
+    /* Config continues... */
+    x |= lgw_sx127x_reg_w(SX1276_REG_RXCONFIG, 0); /* Disable AGC */
+    RssiOffsetReg = (rssi_offset >= 0) ? (uint8_t)rssi_offset : (uint8_t)(~(-rssi_offset)+1); /* 2's complement */
+    x |= lgw_sx127x_reg_w(SX1276_REG_RSSICONFIG, RssiSmoothing | (RssiOffsetReg << 3)); /* Set RSSI smoothing to 64 samples, RSSI offset 3dB */
+    x |= lgw_sx127x_reg_w(SX1276_REG_RXBW, RxBwExp | (RxBwMant << 3));
+    x |= lgw_sx127x_reg_w(SX1276_REG_RXDELAY, 2);
+    x |= lgw_sx127x_reg_w(SX1276_REG_PLL, 0x10); /* PLL BW set to 75 KHz */
+    x |= lgw_sx127x_reg_w(0x43, 1); /* optimize PLL start-up time */
+
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: Failed to configure SX1276\n");
+        return x;
+    }
+
+    /* set Rx continuous mode */
+    x = lgw_sx127x_reg_w(SX1276_REG_OPMODE, 5 | (ModulationShaping << 3)); /* Receiver Mode, no FSK shaping */
+    wait_ms(500);
+    x |= lgw_sx127x_reg_r(SX1276_REG_IRQFLAGS1, &reg_val);
+    /* Check if RxReady and ModeReady */
+    if ((TAKE_N_BITS_FROM(reg_val, 6, 1) == 0) || (TAKE_N_BITS_FROM(reg_val, 7, 1) == 0) || (x != LGW_REG_SUCCESS)) {
+        DEBUG_MSG("ERROR: SX1276 failed to enter RX continuous mode\n");
+        return LGW_REG_ERROR;
+    }
+    wait_ms(500);
+
+    DEBUG_PRINTF("INFO: Successfully configured SX1276 for FSK modulation (rxbw=%d)\n", rxbw_khz);
+
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int reset_sx127x(enum lgw_radio_type_e radio_type) {
+    int x;
+
+    switch(radio_type) {
+        case LGW_RADIO_TYPE_SX1276:
+            x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_RADIO_RESET, 0);
+            x |= lgw_fpga_reg_w(LGW_FPGA_CTRL_RADIO_RESET, 1);
+            if (x != LGW_SPI_SUCCESS) {
+                DEBUG_MSG("ERROR: Failed to reset sx127x\n");
+                return x;
+            }
+            break;
+        case LGW_RADIO_TYPE_SX1272:
+            x  = lgw_fpga_reg_w(LGW_FPGA_CTRL_RADIO_RESET, 1);
+            x |= lgw_fpga_reg_w(LGW_FPGA_CTRL_RADIO_RESET, 0);
+            if (x != LGW_SPI_SUCCESS) {
+                DEBUG_MSG("ERROR: Failed to reset sx127x\n");
+                return x;
+            }
+            break;
+        default:
+            DEBUG_PRINTF("ERROR: Failed to reset sx127x, not supported (%d)\n", radio_type);
+            return LGW_REG_ERROR;
+    }
+
+    return LGW_REG_SUCCESS;
+}
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+int lgw_setup_sx125x(uint8_t rf_chain, uint8_t rf_clkout, bool rf_enable, uint8_t rf_radio_type, uint32_t freq_hz) {
+    uint32_t part_int = 0;
+    uint32_t part_frac = 0;
+    int cpt_attempts = 0;
+
+    if (rf_chain >= LGW_RF_CHAIN_NB) {
+        DEBUG_MSG("ERROR: INVALID RF_CHAIN\n");
+        return -1;
+    }
+
+    /* Get version to identify SX1255/57 silicon revision */
+    DEBUG_PRINTF("Note: SX125x #%d version register returned 0x%02x\n", rf_chain, sx125x_read(rf_chain, 0x07));
+
+    /* General radio setup */
+    if (rf_clkout == rf_chain) {
+        sx125x_write(rf_chain, 0x10, SX125x_TX_DAC_CLK_SEL + 2);
+        DEBUG_PRINTF("Note: SX125x #%d clock output enabled\n", rf_chain);
+    } else {
+        sx125x_write(rf_chain, 0x10, SX125x_TX_DAC_CLK_SEL);
+        DEBUG_PRINTF("Note: SX125x #%d clock output disabled\n", rf_chain);
+    }
+
+    switch (rf_radio_type) {
+        case LGW_RADIO_TYPE_SX1255:
+            sx125x_write(rf_chain, 0x28, SX125x_XOSC_GM_STARTUP + SX125x_XOSC_DISABLE*16);
+            break;
+        case LGW_RADIO_TYPE_SX1257:
+            sx125x_write(rf_chain, 0x26, SX125x_XOSC_GM_STARTUP + SX125x_XOSC_DISABLE*16);
+            break;
+        default:
+            DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d FOR RADIO TYPE\n", rf_radio_type);
+            break;
+    }
+
+    if (rf_enable == true) {
+        /* Tx gain and trim */
+        sx125x_write(rf_chain, 0x08, SX125x_TX_MIX_GAIN + SX125x_TX_DAC_GAIN*16);
+        sx125x_write(rf_chain, 0x0A, SX125x_TX_ANA_BW + SX125x_TX_PLL_BW*32);
+        sx125x_write(rf_chain, 0x0B, SX125x_TX_DAC_BW);
+
+        /* Rx gain and trim */
+        sx125x_write(rf_chain, 0x0C, SX125x_LNA_ZIN + SX125x_RX_BB_GAIN*2 + SX125x_RX_LNA_GAIN*32);
+        sx125x_write(rf_chain, 0x0D, SX125x_RX_BB_BW + SX125x_RX_ADC_TRIM*4 + SX125x_RX_ADC_BW*32);
+        sx125x_write(rf_chain, 0x0E, SX125x_ADC_TEMP + SX125x_RX_PLL_BW*2);
+
+        /* set RX PLL frequency */
+        switch (rf_radio_type) {
+            case LGW_RADIO_TYPE_SX1255:
+                part_int = freq_hz / (SX125x_32MHz_FRAC << 7); /* integer part, gives the MSB */
+                part_frac = ((freq_hz % (SX125x_32MHz_FRAC << 7)) << 9) / SX125x_32MHz_FRAC; /* fractional part, gives middle part and LSB */
+                break;
+            case LGW_RADIO_TYPE_SX1257:
+                part_int = freq_hz / (SX125x_32MHz_FRAC << 8); /* integer part, gives the MSB */
+                part_frac = ((freq_hz % (SX125x_32MHz_FRAC << 8)) << 8) / SX125x_32MHz_FRAC; /* fractional part, gives middle part and LSB */
+                break;
+            default:
+                DEBUG_PRINTF("ERROR: UNEXPECTED VALUE %d FOR RADIO TYPE\n", rf_radio_type);
+                break;
+        }
+
+        sx125x_write(rf_chain, 0x01,0xFF & part_int); /* Most Significant Byte */
+        sx125x_write(rf_chain, 0x02,0xFF & (part_frac >> 8)); /* middle byte */
+        sx125x_write(rf_chain, 0x03,0xFF & part_frac); /* Least Significant Byte */
+
+        /* start and PLL lock */
+        do {
+            if (cpt_attempts >= PLL_LOCK_MAX_ATTEMPTS) {
+                DEBUG_MSG("ERROR: FAIL TO LOCK PLL\n");
+                return -1;
+            }
+            sx125x_write(rf_chain, 0x00, 1); /* enable Xtal oscillator */
+            sx125x_write(rf_chain, 0x00, 3); /* Enable RX (PLL+FE) */
+            ++cpt_attempts;
+            DEBUG_PRINTF("Note: SX125x #%d PLL start (attempt %d)\n", rf_chain, cpt_attempts);
+            wait_ms(1);
+        } while((sx125x_read(rf_chain, 0x11) & 0x02) == 0);
+    } else {
+        DEBUG_PRINTF("Note: SX125x #%d kept in standby mode\n", rf_chain);
+    }
+
+    return 0;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_sx127x_reg_w(uint8_t address, uint8_t reg_value) {
+    return lgw_spi_w(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_SX127X, address, reg_value);
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_sx127x_reg_r(uint8_t address, uint8_t *reg_value) {
+    return lgw_spi_r(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_SX127X, address, reg_value);
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_setup_sx127x(uint32_t frequency, uint8_t modulation, enum lgw_sx127x_rxbw_e rxbw_khz, int8_t rssi_offset) {
+    int x, i;
+    uint8_t version;
+    enum lgw_radio_type_e radio_type = LGW_RADIO_TYPE_NONE;
+    struct lgw_radio_type_version_s supported_radio_type[2] = {
+        {LGW_RADIO_TYPE_SX1272, 0x22},
+        {LGW_RADIO_TYPE_SX1276, 0x12}
+    };
+
+    /* Check parameters */
+    if (modulation != MOD_FSK) {
+        DEBUG_PRINTF("ERROR: modulation not supported for SX127x (%u)\n", modulation);
+        return LGW_REG_ERROR;
+    }
+    if (rxbw_khz > LGW_SX127X_RXBW_250K_HZ) {
+        DEBUG_PRINTF("ERROR: RX bandwidth not supported for SX127x (%u)\n", rxbw_khz);
+        return LGW_REG_ERROR;
+    }
+
+    /* Probing radio type */
+    for (i = 0; i < (int)(sizeof supported_radio_type); i++) {
+        /* Reset the radio */
+        x = reset_sx127x(supported_radio_type[i].type);
+        if (x != LGW_SPI_SUCCESS) {
+            DEBUG_MSG("ERROR: Failed to reset sx127x\n");
+            return x;
+        }
+        /* Read version register */
+        x = lgw_sx127x_reg_r(0x42, &version);
+        if (x != LGW_SPI_SUCCESS) {
+            DEBUG_MSG("ERROR: Failed to read sx127x version register\n");
+            return x;
+        }
+        /* Check if we got the expected version */
+        if (version != supported_radio_type[i].reg_version) {
+            DEBUG_PRINTF("INFO: sx127x version register - read:0x%02x, expected:0x%02x\n", version, supported_radio_type[i].reg_version);
+            continue;
+        } else {
+            DEBUG_PRINTF("INFO: sx127x radio has been found (type:%d, version:0x%02x)\n", supported_radio_type[i].type, version);
+            radio_type = supported_radio_type[i].type;
+            break;
+        }
+    }
+    if (radio_type == LGW_RADIO_TYPE_NONE) {
+        DEBUG_MSG("ERROR: sx127x radio has not been found\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* Setup the radio */
+    switch (modulation) {
+        case MOD_FSK:
+            if (radio_type == LGW_RADIO_TYPE_SX1272) {
+                x = setup_sx1272_FSK(frequency, rxbw_khz, rssi_offset);
+            } else {
+                x = setup_sx1276_FSK(frequency, rxbw_khz, rssi_offset);
+            }
+            break;
+        default:
+            /* Should not happen */
+            break;
+    }
+    if (x != LGW_REG_SUCCESS) {
+        DEBUG_MSG("ERROR: failed to setup SX127x\n");
+        return x;
+    }
+
+    return LGW_REG_SUCCESS;
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_reg.c b/libloragw/src/loragw_reg.c
new file mode 100644
index 0000000..14e23cd
--- /dev/null
+++ b/libloragw/src/loragw_reg.c
@@ -0,0 +1,819 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Functions used to handle a single LoRa concentrator.
+    Registers are addressed by name.
+    Multi-bytes registers are handled automatically.
+    Read-modify-write is handled automatically.
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Sylvain Miermont
+*/
+
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>     /* C99 types */
+#include <stdbool.h>    /* bool type */
+#include <stdio.h>      /* printf fprintf */
+
+#include "loragw_spi.h"
+#include "loragw_reg.h"
+#include "loragw_fpga.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_REG == 1
+    #define DEBUG_MSG(str)              fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)  fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define CHECK_NULL(a)               if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_REG_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define CHECK_NULL(a)               if(a==NULL){return LGW_REG_ERROR;}
+#endif
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define PAGE_ADDR        0x00
+#define PAGE_MASK        0x03
+
+const uint8_t FPGA_VERSION[] = { 31, 33 }; /* several versions could be supported */
+
+/*
+auto generated register mapping for C code : 11-Jul-2013 13:20:40
+this file contains autogenerated C struct used to access the LoRa register from the Primer firmware
+this file is autogenerated from registers description
+293 registers are defined
+*/
+const struct lgw_reg_s loregs[LGW_TOTALREGS] = {
+    {-1,0,0,0,2,0,0},         /* PAGE_REG */
+    {-1,0,7,0,1,0,0},         /* SOFT_RESET */
+    {-1,1,0,0,8,1,103},       /* VERSION */
+    {-1,2,0,0,16,0,0},        /* RX_DATA_BUF_ADDR */
+    {-1,4,0,0,8,0,0},         /* RX_DATA_BUF_DATA */
+    {-1,5,0,0,8,0,0},         /* TX_DATA_BUF_ADDR */
+    {-1,6,0,0,8,0,0},         /* TX_DATA_BUF_DATA */
+    {-1,7,0,0,8,0,0},         /* CAPTURE_RAM_ADDR */
+    {-1,8,0,0,8,1,0},         /* CAPTURE_RAM_DATA */
+    {-1,9,0,0,8,0,0},         /* MCU_PROM_ADDR */
+    {-1,10,0,0,8,0,0},        /* MCU_PROM_DATA */
+    {-1,11,0,0,8,0,0},        /* RX_PACKET_DATA_FIFO_NUM_STORED */
+    {-1,12,0,0,16,1,0},       /* RX_PACKET_DATA_FIFO_ADDR_POINTER */
+    {-1,14,0,0,8,1,0},        /* RX_PACKET_DATA_FIFO_STATUS */
+    {-1,15,0,0,8,1,0},        /* RX_PACKET_DATA_FIFO_PAYLOAD_SIZE */
+    {-1,16,0,0,1,0,0},        /* MBWSSF_MODEM_ENABLE */
+    {-1,16,1,0,1,0,0},        /* CONCENTRATOR_MODEM_ENABLE */
+    {-1,16,2,0,1,0,0},        /* FSK_MODEM_ENABLE */
+    {-1,16,3,0,1,0,0},        /* GLOBAL_EN */
+    {-1,17,0,0,1,0,1},        /* CLK32M_EN */
+    {-1,17,1,0,1,0,1},        /* CLKHS_EN */
+    {-1,18,0,0,1,0,0},        /* START_BIST0 */
+    {-1,18,1,0,1,0,0},        /* START_BIST1 */
+    {-1,18,2,0,1,0,0},        /* CLEAR_BIST0 */
+    {-1,18,3,0,1,0,0},        /* CLEAR_BIST1 */
+    {-1,19,0,0,1,1,0},        /* BIST0_FINISHED */
+    {-1,19,1,0,1,1,0},        /* BIST1_FINISHED */
+    {-1,20,0,0,1,1,0},        /* MCU_AGC_PROG_RAM_BIST_STATUS */
+    {-1,20,1,0,1,1,0},        /* MCU_ARB_PROG_RAM_BIST_STATUS */
+    {-1,20,2,0,1,1,0},        /* CAPTURE_RAM_BIST_STATUS */
+    {-1,20,3,0,1,1,0},        /* CHAN_FIR_RAM0_BIST_STATUS */
+    {-1,20,4,0,1,1,0},        /* CHAN_FIR_RAM1_BIST_STATUS */
+    {-1,21,0,0,1,1,0},        /* CORR0_RAM_BIST_STATUS */
+    {-1,21,1,0,1,1,0},        /* CORR1_RAM_BIST_STATUS */
+    {-1,21,2,0,1,1,0},        /* CORR2_RAM_BIST_STATUS */
+    {-1,21,3,0,1,1,0},        /* CORR3_RAM_BIST_STATUS */
+    {-1,21,4,0,1,1,0},        /* CORR4_RAM_BIST_STATUS */
+    {-1,21,5,0,1,1,0},        /* CORR5_RAM_BIST_STATUS */
+    {-1,21,6,0,1,1,0},        /* CORR6_RAM_BIST_STATUS */
+    {-1,21,7,0,1,1,0},        /* CORR7_RAM_BIST_STATUS */
+    {-1,22,0,0,1,1,0},        /* MODEM0_RAM0_BIST_STATUS */
+    {-1,22,1,0,1,1,0},        /* MODEM1_RAM0_BIST_STATUS */
+    {-1,22,2,0,1,1,0},        /* MODEM2_RAM0_BIST_STATUS */
+    {-1,22,3,0,1,1,0},        /* MODEM3_RAM0_BIST_STATUS */
+    {-1,22,4,0,1,1,0},        /* MODEM4_RAM0_BIST_STATUS */
+    {-1,22,5,0,1,1,0},        /* MODEM5_RAM0_BIST_STATUS */
+    {-1,22,6,0,1,1,0},        /* MODEM6_RAM0_BIST_STATUS */
+    {-1,22,7,0,1,1,0},        /* MODEM7_RAM0_BIST_STATUS */
+    {-1,23,0,0,1,1,0},        /* MODEM0_RAM1_BIST_STATUS */
+    {-1,23,1,0,1,1,0},        /* MODEM1_RAM1_BIST_STATUS */
+    {-1,23,2,0,1,1,0},        /* MODEM2_RAM1_BIST_STATUS */
+    {-1,23,3,0,1,1,0},        /* MODEM3_RAM1_BIST_STATUS */
+    {-1,23,4,0,1,1,0},        /* MODEM4_RAM1_BIST_STATUS */
+    {-1,23,5,0,1,1,0},        /* MODEM5_RAM1_BIST_STATUS */
+    {-1,23,6,0,1,1,0},        /* MODEM6_RAM1_BIST_STATUS */
+    {-1,23,7,0,1,1,0},        /* MODEM7_RAM1_BIST_STATUS */
+    {-1,24,0,0,1,1,0},        /* MODEM0_RAM2_BIST_STATUS */
+    {-1,24,1,0,1,1,0},        /* MODEM1_RAM2_BIST_STATUS */
+    {-1,24,2,0,1,1,0},        /* MODEM2_RAM2_BIST_STATUS */
+    {-1,24,3,0,1,1,0},        /* MODEM3_RAM2_BIST_STATUS */
+    {-1,24,4,0,1,1,0},        /* MODEM4_RAM2_BIST_STATUS */
+    {-1,24,5,0,1,1,0},        /* MODEM5_RAM2_BIST_STATUS */
+    {-1,24,6,0,1,1,0},        /* MODEM6_RAM2_BIST_STATUS */
+    {-1,24,7,0,1,1,0},        /* MODEM7_RAM2_BIST_STATUS */
+    {-1,25,0,0,1,1,0},        /* MODEM_MBWSSF_RAM0_BIST_STATUS */
+    {-1,25,1,0,1,1,0},        /* MODEM_MBWSSF_RAM1_BIST_STATUS */
+    {-1,25,2,0,1,1,0},        /* MODEM_MBWSSF_RAM2_BIST_STATUS */
+    {-1,26,0,0,1,1,0},        /* MCU_AGC_DATA_RAM_BIST0_STATUS */
+    {-1,26,1,0,1,1,0},        /* MCU_AGC_DATA_RAM_BIST1_STATUS */
+    {-1,26,2,0,1,1,0},        /* MCU_ARB_DATA_RAM_BIST0_STATUS */
+    {-1,26,3,0,1,1,0},        /* MCU_ARB_DATA_RAM_BIST1_STATUS */
+    {-1,26,4,0,1,1,0},        /* TX_TOP_RAM_BIST0_STATUS */
+    {-1,26,5,0,1,1,0},        /* TX_TOP_RAM_BIST1_STATUS */
+    {-1,26,6,0,1,1,0},        /* DATA_MNGT_RAM_BIST0_STATUS */
+    {-1,26,7,0,1,1,0},        /* DATA_MNGT_RAM_BIST1_STATUS */
+    {-1,27,0,0,4,0,0},        /* GPIO_SELECT_INPUT */
+    {-1,28,0,0,4,0,0},        /* GPIO_SELECT_OUTPUT */
+    {-1,29,0,0,5,0,0},        /* GPIO_MODE */
+    {-1,30,0,0,5,1,0},        /* GPIO_PIN_REG_IN */
+    {-1,31,0,0,5,0,0},        /* GPIO_PIN_REG_OUT */
+    {-1,32,0,0,8,1,0},        /* MCU_AGC_STATUS */
+    {-1,125,0,0,8,1,0},       /* MCU_ARB_STATUS */
+    {-1,126,0,0,8,1,1},       /* CHIP_ID */
+    {-1,127,0,0,1,0,1},       /* EMERGENCY_FORCE_HOST_CTRL */
+    {0,33,0,0,1,0,0},         /* RX_INVERT_IQ */
+    {0,33,1,0,1,0,1},         /* MODEM_INVERT_IQ */
+    {0,33,2,0,1,0,0},         /* MBWSSF_MODEM_INVERT_IQ */
+    {0,33,3,0,1,0,0},         /* RX_EDGE_SELECT */
+    {0,33,4,0,1,0,0},         /* MISC_RADIO_EN */
+    {0,33,5,0,1,0,0},         /* FSK_MODEM_INVERT_IQ */
+    {0,34,0,0,4,0,7},         /* FILTER_GAIN */
+    {0,35,0,0,8,0,240},       /* RADIO_SELECT */
+    {0,36,0,1,13,0,-384},     /* IF_FREQ_0 */
+    {0,38,0,1,13,0,-128},     /* IF_FREQ_1 */
+    {0,40,0,1,13,0,128},      /* IF_FREQ_2 */
+    {0,42,0,1,13,0,384},      /* IF_FREQ_3 */
+    {0,44,0,1,13,0,-384},     /* IF_FREQ_4 */
+    {0,46,0,1,13,0,-128},     /* IF_FREQ_5 */
+    {0,48,0,1,13,0,128},      /* IF_FREQ_6 */
+    {0,50,0,1,13,0,384},      /* IF_FREQ_7 */
+    {0,52,0,1,13,0,0},        /* IF_FREQ_8 */
+    {0,54,0,1,13,0,0},        /* IF_FREQ_9 */
+    {0,64,0,0,1,0,0},        /* CHANN_OVERRIDE_AGC_GAIN */
+    {0,64,1,0,4,0,7},        /* CHANN_AGC_GAIN */
+    {0,65,0,0,7,0,0},        /* CORR0_DETECT_EN */
+    {0,66,0,0,7,0,0},        /* CORR1_DETECT_EN */
+    {0,67,0,0,7,0,0},        /* CORR2_DETECT_EN */
+    {0,68,0,0,7,0,0},        /* CORR3_DETECT_EN */
+    {0,69,0,0,7,0,0},        /* CORR4_DETECT_EN */
+    {0,70,0,0,7,0,0},        /* CORR5_DETECT_EN */
+    {0,71,0,0,7,0,0},        /* CORR6_DETECT_EN */
+    {0,72,0,0,7,0,0},        /* CORR7_DETECT_EN */
+    {0,73,0,0,1,0,0},        /* CORR_SAME_PEAKS_OPTION_SF6 */
+    {0,73,1,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF7 */
+    {0,73,2,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF8 */
+    {0,73,3,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF9 */
+    {0,73,4,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF10 */
+    {0,73,5,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF11 */
+    {0,73,6,0,1,0,1},        /* CORR_SAME_PEAKS_OPTION_SF12 */
+    {0,74,0,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF6 */
+    {0,74,4,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF7 */
+    {0,75,0,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF8 */
+    {0,75,4,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF9 */
+    {0,76,0,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF10 */
+    {0,76,4,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF11 */
+    {0,77,0,0,4,0,4},        /* CORR_SIG_NOISE_RATIO_SF12 */
+    {0,78,0,0,4,0,4},        /* CORR_NUM_SAME_PEAK */
+    {0,78,4,0,3,0,5},        /* CORR_MAC_GAIN */
+    {0,81,0,0,12,0,0},       /* ADJUST_MODEM_START_OFFSET_RDX4 */
+    {0,83,0,0,12,0,4092},    /* ADJUST_MODEM_START_OFFSET_SF12_RDX4 */
+    {0,85,0,0,8,0,7},        /* DBG_CORR_SELECT_SF */
+    {0,86,0,0,8,0,0},        /* DBG_CORR_SELECT_CHANNEL */
+    {0,87,0,0,8,1,0},        /* DBG_DETECT_CPT */
+    {0,88,0,0,8,1,0},        /* DBG_SYMB_CPT */
+    {0,89,0,0,1,0,1},        /* CHIRP_INVERT_RX */
+    {0,89,1,0,1,0,1},        /* DC_NOTCH_EN */
+    {0,90,0,0,1,0,0},        /* IMPLICIT_CRC_EN */
+    {0,90,1,0,3,0,0},        /* IMPLICIT_CODING_RATE */
+    {0,91,0,0,8,0,0},        /* IMPLICIT_PAYLOAD_LENGHT */
+    {0,92,0,0,8,0,29},       /* FREQ_TO_TIME_INVERT */
+    {0,93,0,0,6,0,9},        /* FREQ_TO_TIME_DRIFT */
+    {0,94,0,0,2,0,2},        /* PAYLOAD_FINE_TIMING_GAIN */
+    {0,94,2,0,2,0,1},        /* PREAMBLE_FINE_TIMING_GAIN */
+    {0,94,4,0,2,0,0},        /* TRACKING_INTEGRAL */
+    {0,95,0,0,4,0,1},        /* FRAME_SYNCH_PEAK1_POS */
+    {0,95,4,0,4,0,2},        /* FRAME_SYNCH_PEAK2_POS */
+    {0,96,0,0,16,0,10},      /* PREAMBLE_SYMB1_NB */
+    {0,98,0,0,1,0,1},        /* FRAME_SYNCH_GAIN */
+    {0,98,1,0,1,0,1},        /* SYNCH_DETECT_TH */
+    {0,99,0,0,4,0,8},        /* LLR_SCALE */
+    {0,99,4,0,2,0,2},        /* SNR_AVG_CST */
+    {0,100,0,0,7,0,0},       /* PPM_OFFSET */
+    {0,101,0,0,8,0,255},     /* MAX_PAYLOAD_LEN */
+    {0,102,0,0,1,0,1},        /* ONLY_CRC_EN */
+    {0,103,0,0,8,0,0},        /* ZERO_PAD */
+    {0,104,0,0,4,0,8},        /* DEC_GAIN_OFFSET */
+    {0,104,4,0,4,0,7},        /* CHAN_GAIN_OFFSET */
+    {0,105,1,0,1,0,1},        /* FORCE_HOST_RADIO_CTRL */
+    {0,105,2,0,1,0,1},        /* FORCE_HOST_FE_CTRL */
+    {0,105,3,0,1,0,1},        /* FORCE_DEC_FILTER_GAIN */
+    {0,106,0,0,1,0,1},        /* MCU_RST_0 */
+    {0,106,1,0,1,0,1},        /* MCU_RST_1 */
+    {0,106,2,0,1,0,0},        /* MCU_SELECT_MUX_0 */
+    {0,106,3,0,1,0,0},        /* MCU_SELECT_MUX_1 */
+    {0,106,4,0,1,1,0},        /* MCU_CORRUPTION_DETECTED_0 */
+    {0,106,5,0,1,1,0},        /* MCU_CORRUPTION_DETECTED_1 */
+    {0,106,6,0,1,0,0},        /* MCU_SELECT_EDGE_0 */
+    {0,106,7,0,1,0,0},        /* MCU_SELECT_EDGE_1 */
+    {0,107,0,0,8,0,1},        /* CHANN_SELECT_RSSI */
+    {0,108,0,0,8,0,32},       /* RSSI_BB_DEFAULT_VALUE */
+    {0,109,0,0,8,0,100},      /* RSSI_DEC_DEFAULT_VALUE */
+    {0,110,0,0,8,0,100},      /* RSSI_CHANN_DEFAULT_VALUE */
+    {0,111,0,0,5,0,7},        /* RSSI_BB_FILTER_ALPHA */
+    {0,112,0,0,5,0,5},        /* RSSI_DEC_FILTER_ALPHA */
+    {0,113,0,0,5,0,8},        /* RSSI_CHANN_FILTER_ALPHA */
+    {0,114,0,0,6,0,0},        /* IQ_MISMATCH_A_AMP_COEFF */
+    {0,115,0,0,6,0,0},        /* IQ_MISMATCH_A_PHI_COEFF */
+    {0,116,0,0,6,0,0},        /* IQ_MISMATCH_B_AMP_COEFF */
+    {0,116,6,0,1,0,0},        /* IQ_MISMATCH_B_SEL_I */
+    {0,117,0,0,6,0,0},        /* IQ_MISMATCH_B_PHI_COEFF */
+    {1,33,0,0,1,0,0},         /* TX_TRIG_IMMEDIATE */
+    {1,33,1,0,1,0,0},         /* TX_TRIG_DELAYED */
+    {1,33,2,0,1,0,0},         /* TX_TRIG_GPS */
+    {1,34,0,0,16,0,0},        /* TX_START_DELAY */
+    {1,36,0,0,4,0,1},        /* TX_FRAME_SYNCH_PEAK1_POS */
+    {1,36,4,0,4,0,2},        /* TX_FRAME_SYNCH_PEAK2_POS */
+    {1,37,0,0,3,0,0},        /* TX_RAMP_DURATION */
+    {1,39,0,1,8,0,0},        /* TX_OFFSET_I */
+    {1,40,0,1,8,0,0},        /* TX_OFFSET_Q */
+    {1,41,0,0,1,0,0},        /* TX_MODE */
+    {1,41,1,0,4,0,0},        /* TX_ZERO_PAD */
+    {1,41,5,0,1,0,0},        /* TX_EDGE_SELECT */
+    {1,41,6,0,1,0,0},        /* TX_EDGE_SELECT_TOP */
+    {1,42,0,0,2,0,0},        /* TX_GAIN */
+    {1,42,2,0,3,0,5},        /* TX_CHIRP_LOW_PASS */
+    {1,42,5,0,2,0,0},        /* TX_FCC_WIDEBAND */
+    {1,42,7,0,1,0,1},        /* TX_SWAP_IQ */
+    {1,43,0,0,1,0,0},        /* MBWSSF_IMPLICIT_HEADER */
+    {1,43,1,0,1,0,0},        /* MBWSSF_IMPLICIT_CRC_EN */
+    {1,43,2,0,3,0,0},        /* MBWSSF_IMPLICIT_CODING_RATE */
+    {1,44,0,0,8,0,0},        /* MBWSSF_IMPLICIT_PAYLOAD_LENGHT */
+    {1,45,0,0,1,0,1},        /* MBWSSF_AGC_FREEZE_ON_DETECT */
+    {1,46,0,0,4,0,1},        /* MBWSSF_FRAME_SYNCH_PEAK1_POS */
+    {1,46,4,0,4,0,2},        /* MBWSSF_FRAME_SYNCH_PEAK2_POS */
+    {1,47,0,0,16,0,10},      /* MBWSSF_PREAMBLE_SYMB1_NB */
+    {1,49,0,0,1,0,1},        /* MBWSSF_FRAME_SYNCH_GAIN */
+    {1,49,1,0,1,0,1},        /* MBWSSF_SYNCH_DETECT_TH */
+    {1,50,0,0,8,0,10},       /* MBWSSF_DETECT_MIN_SINGLE_PEAK */
+    {1,51,0,0,3,0,3},        /* MBWSSF_DETECT_TRIG_SAME_PEAK_NB */
+    {1,52,0,0,8,0,29},       /* MBWSSF_FREQ_TO_TIME_INVERT */
+    {1,53,0,0,6,0,36},       /* MBWSSF_FREQ_TO_TIME_DRIFT */
+    {1,54,0,0,12,0,0},       /* MBWSSF_PPM_CORRECTION */
+    {1,56,0,0,2,0,2},        /* MBWSSF_PAYLOAD_FINE_TIMING_GAIN */
+    {1,56,2,0,2,0,1},        /* MBWSSF_PREAMBLE_FINE_TIMING_GAIN */
+    {1,56,4,0,2,0,0},        /* MBWSSF_TRACKING_INTEGRAL */
+    {1,57,0,0,8,0,0},        /* MBWSSF_ZERO_PAD */
+    {1,58,0,0,2,0,0},        /* MBWSSF_MODEM_BW */
+    {1,58,2,0,1,0,0},        /* MBWSSF_RADIO_SELECT */
+    {1,58,3,0,1,0,1},        /* MBWSSF_RX_CHIRP_INVERT */
+    {1,59,0,0,4,0,8},        /* MBWSSF_LLR_SCALE */
+    {1,59,4,0,2,0,3},        /* MBWSSF_SNR_AVG_CST */
+    {1,59,6,0,1,0,0},        /* MBWSSF_PPM_OFFSET */
+    {1,60,0,0,4,0,7},        /* MBWSSF_RATE_SF */
+    {1,60,4,0,1,0,1},        /* MBWSSF_ONLY_CRC_EN */
+    {1,61,0,0,8,0,255},      /* MBWSSF_MAX_PAYLOAD_LEN */
+    {1,62,0,0,8,1,128},      /* TX_STATUS */
+    {1,63,0,0,3,0,0},        /* FSK_CH_BW_EXPO */
+    {1,63,3,0,3,0,0},        /* FSK_RSSI_LENGTH */
+    {1,63,6,0,1,0,0},        /* FSK_RX_INVERT */
+    {1,63,7,0,1,0,0},        /* FSK_PKT_MODE */
+    {1,64,0,0,3,0,0},        /* FSK_PSIZE */
+    {1,64,3,0,1,0,0},        /* FSK_CRC_EN */
+    {1,64,4,0,2,0,0},        /* FSK_DCFREE_ENC */
+    {1,64,6,0,1,0,0},        /* FSK_CRC_IBM */
+    {1,65,0,0,5,0,0},        /* FSK_ERROR_OSR_TOL */
+    {1,65,7,0,1,0,0},        /* FSK_RADIO_SELECT */
+    {1,66,0,0,16,0,0},       /* FSK_BR_RATIO */
+    {1,68,0,0,32,0,0},       /* FSK_REF_PATTERN_LSB */
+    {1,72,0,0,32,0,0},       /* FSK_REF_PATTERN_MSB */
+    {1,76,0,0,8,0,0},        /* FSK_PKT_LENGTH */
+    {1,77,0,0,1,0,1},        /* FSK_TX_GAUSSIAN_EN */
+    {1,77,1,0,2,0,0},        /* FSK_TX_GAUSSIAN_SELECT_BT */
+    {1,77,3,0,1,0,1},        /* FSK_TX_PATTERN_EN */
+    {1,77,4,0,1,0,0},        /* FSK_TX_PREAMBLE_SEQ */
+    {1,77,5,0,3,0,0},        /* FSK_TX_PSIZE */
+    {1,80,0,0,8,0,0},        /* FSK_NODE_ADRS */
+    {1,81,0,0,8,0,0},        /* FSK_BROADCAST */
+    {1,82,0,0,1,0,1},        /* FSK_AUTO_AFC_ON */
+    {1,83,0,0,10,0,0},       /* FSK_PATTERN_TIMEOUT_CFG */
+    {2,33,0,0,8,0,0},        /* SPI_RADIO_A__DATA */
+    {2,34,0,0,8,1,0},        /* SPI_RADIO_A__DATA_READBACK */
+    {2,35,0,0,8,0,0},        /* SPI_RADIO_A__ADDR */
+    {2,37,0,0,1,0,0},        /* SPI_RADIO_A__CS */
+    {2,38,0,0,8,0,0},        /* SPI_RADIO_B__DATA */
+    {2,39,0,0,8,1,0},        /* SPI_RADIO_B__DATA_READBACK */
+    {2,40,0,0,8,0,0},        /* SPI_RADIO_B__ADDR */
+    {2,42,0,0,1,0,0},        /* SPI_RADIO_B__CS */
+    {2,43,0,0,1,0,0},        /* RADIO_A_EN */
+    {2,43,1,0,1,0,0},        /* RADIO_B_EN */
+    {2,43,2,0,1,0,1},        /* RADIO_RST */
+    {2,43,3,0,1,0,0},        /* LNA_A_EN */
+    {2,43,4,0,1,0,0},        /* PA_A_EN */
+    {2,43,5,0,1,0,0},        /* LNA_B_EN */
+    {2,43,6,0,1,0,0},        /* PA_B_EN */
+    {2,44,0,0,2,0,0},        /* PA_GAIN */
+    {2,45,0,0,4,0,2},        /* LNA_A_CTRL_LUT */
+    {2,45,4,0,4,0,4},        /* PA_A_CTRL_LUT */
+    {2,46,0,0,4,0,2},        /* LNA_B_CTRL_LUT */
+    {2,46,4,0,4,0,4},        /* PA_B_CTRL_LUT */
+    {2,47,0,0,5,0,0},        /* CAPTURE_SOURCE */
+    {2,47,5,0,1,0,0},        /* CAPTURE_START */
+    {2,47,6,0,1,0,0},        /* CAPTURE_FORCE_TRIGGER */
+    {2,47,7,0,1,0,0},        /* CAPTURE_WRAP */
+    {2,48,0,0,16,0,0},       /* CAPTURE_PERIOD */
+    {2,51,0,0,8,1,0},        /* MODEM_STATUS */
+    {2,52,0,0,8,1,0},        /* VALID_HEADER_COUNTER_0 */
+    {2,54,0,0,8,1,0},        /* VALID_PACKET_COUNTER_0 */
+    {2,56,0,0,8,1,0},        /* VALID_HEADER_COUNTER_MBWSSF */
+    {2,57,0,0,8,1,0},        /* VALID_HEADER_COUNTER_FSK */
+    {2,58,0,0,8,1,0},        /* VALID_PACKET_COUNTER_MBWSSF */
+    {2,59,0,0,8,1,0},        /* VALID_PACKET_COUNTER_FSK */
+    {2,60,0,0,8,1,0},        /* CHANN_RSSI */
+    {2,61,0,0,8,1,0},        /* BB_RSSI */
+    {2,62,0,0,8,1,0},        /* DEC_RSSI */
+    {2,63,0,0,8,1,0},        /* DBG_MCU_DATA */
+    {2,64,0,0,8,1,0},        /* DBG_ARB_MCU_RAM_DATA */
+    {2,65,0,0,8,1,0},        /* DBG_AGC_MCU_RAM_DATA */
+    {2,66,0,0,16,1,0},       /* NEXT_PACKET_CNT */
+    {2,68,0,0,16,1,0},       /* ADDR_CAPTURE_COUNT */
+    {2,70,0,0,32,1,0},       /* TIMESTAMP */
+    {2,74,0,0,4,1,0},        /* DBG_CHANN0_GAIN */
+    {2,74,4,0,4,1,0},        /* DBG_CHANN1_GAIN */
+    {2,75,0,0,4,1,0},        /* DBG_CHANN2_GAIN */
+    {2,75,4,0,4,1,0},        /* DBG_CHANN3_GAIN */
+    {2,76,0,0,4,1,0},        /* DBG_CHANN4_GAIN */
+    {2,76,4,0,4,1,0},        /* DBG_CHANN5_GAIN */
+    {2,77,0,0,4,1,0},        /* DBG_CHANN6_GAIN */
+    {2,77,4,0,4,1,0},        /* DBG_CHANN7_GAIN */
+    {2,78,0,0,4,1,0},        /* DBG_DEC_FILT_GAIN */
+    {2,79,0,0,3,1,0},        /* SPI_DATA_FIFO_PTR */
+    {2,79,3,0,3,1,0},        /* PACKET_DATA_FIFO_PTR */
+    {2,80,0,0,8,0,0},        /* DBG_ARB_MCU_RAM_ADDR */
+    {2,81,0,0,8,0,0},        /* DBG_AGC_MCU_RAM_ADDR */
+    {2,82,0,0,1,0,0},        /* SPI_MASTER_CHIP_SELECT_POLARITY */
+    {2,82,1,0,1,0,0},        /* SPI_MASTER_CPOL */
+    {2,82,2,0,1,0,0},        /* SPI_MASTER_CPHA */
+    {2,83,0,0,1,0,0},        /* SIG_GEN_ANALYSER_MUX_SEL */
+    {2,84,0,0,1,0,0},        /* SIG_GEN_EN */
+    {2,84,1,0,1,0,0},        /* SIG_ANALYSER_EN */
+    {2,84,2,0,2,0,0},        /* SIG_ANALYSER_AVG_LEN */
+    {2,84,4,0,3,0,0},        /* SIG_ANALYSER_PRECISION */
+    {2,84,7,0,1,1,0},        /* SIG_ANALYSER_VALID_OUT */
+    {2,85,0,0,8,0,0},        /* SIG_GEN_FREQ */
+    {2,86,0,0,8,0,0},        /* SIG_ANALYSER_FREQ */
+    {2,87,0,0,8,1,0},        /* SIG_ANALYSER_I_OUT */
+    {2,88,0,0,8,1,0},        /* SIG_ANALYSER_Q_OUT */
+    {2,89,0,0,1,0,0},        /* GPS_EN */
+    {2,89,1,0,1,0,1},        /* GPS_POL */
+    {2,90,0,1,8,0,0},        /* SW_TEST_REG1 */
+    {2,91,2,1,6,0,0},        /* SW_TEST_REG2 */
+    {2,92,0,1,16,0,0},       /* SW_TEST_REG3 */
+    {2,94,0,0,4,1,0},        /* DATA_MNGT_STATUS */
+    {2,95,0,0,5,1,0},        /* DATA_MNGT_CPT_FRAME_ALLOCATED */
+    {2,96,0,0,5,1,0},        /* DATA_MNGT_CPT_FRAME_FINISHED */
+    {2,97,0,0,5,1,0},        /* DATA_MNGT_CPT_FRAME_READEN */
+    {1,33,0,0,8,0,0}         /* TX_TRIG_ALL (alias) */
+};
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+static int lgw_regpage = -1; /*! keep the value of the register page selected */
+
+/* -------------------------------------------------------------------------- */
+/* --- INTERNAL SHARED VARIABLES -------------------------------------------- */
+
+void *lgw_spi_target = NULL; /*! generic pointer to the SPI device */
+uint8_t lgw_spi_mux_mode = 0; /*! current SPI mux mode used */
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE FUNCTIONS ---------------------------------------------------- */
+
+int page_switch(uint8_t target) {
+    lgw_regpage = PAGE_MASK & target;
+    lgw_spi_w(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, PAGE_ADDR, (uint8_t)lgw_regpage);
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+bool check_fpga_version(uint8_t version) {
+    int i;
+
+    for (i = 0; i < (int)(sizeof FPGA_VERSION); i++) {
+        if (FPGA_VERSION[i] == version ) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int reg_w_align32(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, struct lgw_reg_s r, int32_t reg_value) {
+    int spi_stat = LGW_REG_SUCCESS;
+    int i, size_byte;
+    uint8_t buf[4] = "\x00\x00\x00\x00";
+
+    if ((r.leng == 8) && (r.offs == 0)) {
+        /* direct write */
+        spi_stat += lgw_spi_w(spi_target, spi_mux_mode, spi_mux_target, r.addr, (uint8_t)reg_value);
+    } else if ((r.offs + r.leng) <= 8) {
+        /* single-byte read-modify-write, offs:[0-7], leng:[1-7] */
+        spi_stat += lgw_spi_r(spi_target, spi_mux_mode, spi_mux_target, r.addr, &buf[0]);
+        buf[1] = ((1 << r.leng) - 1) << r.offs; /* bit mask */
+        buf[2] = ((uint8_t)reg_value) << r.offs; /* new data offsetted */
+        buf[3] = (~buf[1] & buf[0]) | (buf[1] & buf[2]); /* mixing old & new data */
+        spi_stat += lgw_spi_w(spi_target, spi_mux_mode, spi_mux_target, r.addr, buf[3]);
+    } else if ((r.offs == 0) && (r.leng > 0) && (r.leng <= 32)) {
+        /* multi-byte direct write routine */
+        size_byte = (r.leng + 7) / 8; /* add a byte if it's not an exact multiple of 8 */
+        for (i=0; i<size_byte; ++i) {
+            /* big endian register file for a file on N bytes
+            Least significant byte is stored in buf[0], most one in buf[N-1] */
+            buf[i] = (uint8_t)(0x000000FF & reg_value);
+            reg_value = (reg_value >> 8);
+        }
+        spi_stat += lgw_spi_wb(spi_target, spi_mux_mode, spi_mux_target, r.addr, buf, size_byte); /* write the register in one burst */
+    } else {
+        /* register spanning multiple memory bytes but with an offset */
+        DEBUG_MSG("ERROR: REGISTER SIZE AND OFFSET ARE NOT SUPPORTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    return spi_stat;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int reg_r_align32(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, struct lgw_reg_s r, int32_t *reg_value) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    uint8_t bufu[4] = "\x00\x00\x00\x00";
+    int8_t *bufs = (int8_t *)bufu;
+    int i, size_byte;
+    uint32_t u = 0;
+
+    if ((r.offs + r.leng) <= 8) {
+        /* read one byte, then shift and mask bits to get reg value with sign extension if needed */
+        spi_stat += lgw_spi_r(spi_target, spi_mux_mode, spi_mux_target, r.addr, &bufu[0]);
+        bufu[1] = bufu[0] << (8 - r.leng - r.offs); /* left-align the data */
+        if (r.sign == true) {
+            bufs[2] = bufs[1] >> (8 - r.leng); /* right align the data with sign extension (ARITHMETIC right shift) */
+            *reg_value = (int32_t)bufs[2]; /* signed pointer -> 32b sign extension */
+        } else {
+            bufu[2] = bufu[1] >> (8 - r.leng); /* right align the data, no sign extension */
+            *reg_value = (int32_t)bufu[2]; /* unsigned pointer -> no sign extension */
+        }
+    } else if ((r.offs == 0) && (r.leng > 0) && (r.leng <= 32)) {
+        size_byte = (r.leng + 7) / 8; /* add a byte if it's not an exact multiple of 8 */
+        spi_stat += lgw_spi_rb(spi_target, spi_mux_mode, spi_mux_target, r.addr, bufu, size_byte);
+        u = 0;
+        for (i=(size_byte-1); i>=0; --i) {
+            u = (uint32_t)bufu[i] + (u << 8); /* transform a 4-byte array into a 32 bit word */
+        }
+        if (r.sign == true) {
+            u = u << (32 - r.leng); /* left-align the data */
+            *reg_value = (int32_t)u >> (32 - r.leng); /* right-align the data with sign extension (ARITHMETIC right shift) */
+        } else {
+            *reg_value = (int32_t)u; /* unsigned value -> return 'as is' */
+        }
+    } else {
+        /* register spanning multiple memory bytes but with an offset */
+        DEBUG_MSG("ERROR: REGISTER SIZE AND OFFSET ARE NOT SUPPORTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    return spi_stat;
+}
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+/* Concentrator connect */
+int lgw_connect(bool spi_only, uint32_t tx_notch_freq) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    uint8_t u = 0;
+    int x;
+
+    /* check SPI link status */
+    if (lgw_spi_target != NULL) {
+        DEBUG_MSG("WARNING: concentrator was already connected\n");
+        lgw_spi_close(lgw_spi_target);
+    }
+
+    /* open the SPI link */
+    spi_stat = lgw_spi_open(&lgw_spi_target);
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR CONNECTING CONCENTRATOR\n");
+        return LGW_REG_ERROR;
+    }
+
+    if (spi_only == false ) {
+        /* Detect if the gateway has an FPGA with SPI mux header support */
+        /* First, we assume there is an FPGA, and try to read its version */
+        spi_stat = lgw_spi_r(lgw_spi_target, LGW_SPI_MUX_MODE1, LGW_SPI_MUX_TARGET_FPGA, loregs[LGW_VERSION].addr, &u);
+        if (spi_stat != LGW_SPI_SUCCESS) {
+            DEBUG_MSG("ERROR READING VERSION REGISTER\n");
+            return LGW_REG_ERROR;
+        }
+        if (check_fpga_version(u) != true) {
+            /* We failed to read expected FPGA version, so let's assume there is no FPGA */
+            DEBUG_PRINTF("INFO: no FPGA detected or version not supported (v%u)\n", u);
+            lgw_spi_mux_mode = LGW_SPI_MUX_MODE0;
+        } else {
+            DEBUG_PRINTF("INFO: detected FPGA with SPI mux header (v%u)\n", u);
+            lgw_spi_mux_mode = LGW_SPI_MUX_MODE1;
+            /* FPGA Soft Reset */
+            lgw_spi_w(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_FPGA, 0, 1);
+            lgw_spi_w(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_FPGA, 0, 0);
+            /* FPGA configure */
+            x = lgw_fpga_configure(tx_notch_freq);
+            if (x != LGW_REG_SUCCESS) {
+                DEBUG_MSG("ERROR CONFIGURING FPGA\n");
+                return LGW_REG_ERROR;
+            }
+        }
+
+        /* check SX1301 version */
+        spi_stat = lgw_spi_r(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, loregs[LGW_VERSION].addr, &u);
+        if (spi_stat != LGW_SPI_SUCCESS) {
+            DEBUG_MSG("ERROR READING CHIP VERSION REGISTER\n");
+            return LGW_REG_ERROR;
+        }
+        if (u != loregs[LGW_VERSION].dflt) {
+            DEBUG_PRINTF("ERROR: NOT EXPECTED CHIP VERSION (v%u)\n", u);
+            return LGW_REG_ERROR;
+        }
+
+        /* write 0 to the page/reset register */
+        spi_stat = lgw_spi_w(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, loregs[LGW_PAGE_REG].addr, 0);
+        if (spi_stat != LGW_SPI_SUCCESS) {
+            DEBUG_MSG("ERROR WRITING PAGE REGISTER\n");
+            return LGW_REG_ERROR;
+        } else {
+            lgw_regpage = 0;
+        }
+    }
+
+    DEBUG_MSG("Note: success connecting the concentrator\n");
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Concentrator disconnect */
+int lgw_disconnect(void) {
+    if (lgw_spi_target != NULL) {
+        lgw_spi_close(lgw_spi_target);
+        lgw_spi_target = NULL;
+        DEBUG_MSG("Note: success disconnecting the concentrator\n");
+        return LGW_REG_SUCCESS;
+    } else {
+        DEBUG_MSG("WARNING: concentrator was already disconnected\n");
+        return LGW_REG_ERROR;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* soft-reset function */
+int lgw_soft_reset(void) {
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+    lgw_spi_w(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, 0, 0x80); /* 1 -> SOFT_RESET bit */
+    lgw_regpage = 0; /* reset the paging static variable */
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* register verification */
+int lgw_reg_check(FILE *f) {
+    struct lgw_reg_s r;
+    int32_t read_value;
+    char ok_msg[] = "+++MATCH+++";
+    char notok_msg[] = "###MISMATCH###";
+    char *ptr;
+    int i;
+
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        fprintf(f, "ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    fprintf(f, "Start of register verification\n");
+    for (i=0; i<LGW_TOTALREGS; ++i) {
+        r = loregs[i];
+        lgw_reg_r(i, &read_value);
+        ptr = (read_value == r.dflt) ? ok_msg : notok_msg;
+        if (r.sign == true)
+            fprintf(f, "%s reg number %d read: %d (%x) default: %d (%x)\n", ptr, i, read_value, read_value, r.dflt, r.dflt);
+        else
+            fprintf(f, "%s reg number %d read: %u (%x) default: %u (%x)\n", ptr, i, read_value, read_value, r.dflt, r.dflt);
+    }
+    fprintf(f, "End of register verification\n");
+
+    return LGW_REG_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Write to a register addressed by name */
+int lgw_reg_w(uint16_t register_id, int32_t reg_value) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    if (register_id >= LGW_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* intercept direct access to PAGE_REG & SOFT_RESET */
+    if (register_id == LGW_PAGE_REG) {
+        page_switch(reg_value);
+        return LGW_REG_SUCCESS;
+    } else if (register_id == LGW_SOFT_RESET) {
+        /* only reset if lsb is 1 */
+        if ((reg_value & 0x01) != 0)
+            lgw_soft_reset();
+        return LGW_REG_SUCCESS;
+    }
+
+    /* get register struct from the struct array */
+    r = loregs[register_id];
+
+    /* reject write to read-only registers */
+    if (r.rdon == 1){
+        DEBUG_MSG("ERROR: TRYING TO WRITE A READ-ONLY REGISTER\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* select proper register page if needed */
+    if ((r.page != -1) && (r.page != lgw_regpage)) {
+        spi_stat += page_switch(r.page);
+    }
+
+    spi_stat += reg_w_align32(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, r, reg_value);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Read to a register addressed by name */
+int lgw_reg_r(uint16_t register_id, int32_t *reg_value) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(reg_value);
+    if (register_id >= LGW_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = loregs[register_id];
+
+    /* select proper register page if needed */
+    if ((r.page != -1) && (r.page != lgw_regpage)) {
+        spi_stat += page_switch(r.page);
+    }
+
+    spi_stat += reg_r_align32(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, r, reg_value);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Point to a register by name and do a burst write */
+int lgw_reg_wb(uint16_t register_id, uint8_t *data, uint16_t size) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_REG_ERROR;
+    }
+    if (register_id >= LGW_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = loregs[register_id];
+
+    /* reject write to read-only registers */
+    if (r.rdon == 1){
+        DEBUG_MSG("ERROR: TRYING TO BURST WRITE A READ-ONLY REGISTER\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* select proper register page if needed */
+    if ((r.page != -1) && (r.page != lgw_regpage)) {
+        spi_stat += page_switch(r.page);
+    }
+
+    /* do the burst write */
+    spi_stat += lgw_spi_wb(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, r.addr, data, size);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER BURST WRITE\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Point to a register by name and do a burst read */
+int lgw_reg_rb(uint16_t register_id, uint8_t *data, uint16_t size) {
+    int spi_stat = LGW_SPI_SUCCESS;
+    struct lgw_reg_s r;
+
+    /* check input parameters */
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_REG_ERROR;
+    }
+    if (register_id >= LGW_TOTALREGS) {
+        DEBUG_MSG("ERROR: REGISTER NUMBER OUT OF DEFINED RANGE\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* check if SPI is initialised */
+    if ((lgw_spi_target == NULL) || (lgw_regpage < 0)) {
+        DEBUG_MSG("ERROR: CONCENTRATOR UNCONNECTED\n");
+        return LGW_REG_ERROR;
+    }
+
+    /* get register struct from the struct array */
+    r = loregs[register_id];
+
+    /* select proper register page if needed */
+    if ((r.page != -1) && (r.page != lgw_regpage)) {
+        spi_stat += page_switch(r.page);
+    }
+
+    /* do the burst read */
+    spi_stat += lgw_spi_rb(lgw_spi_target, lgw_spi_mux_mode, LGW_SPI_MUX_TARGET_SX1301, r.addr, data, size);
+
+    if (spi_stat != LGW_SPI_SUCCESS) {
+        DEBUG_MSG("ERROR: SPI ERROR DURING REGISTER BURST READ\n");
+        return LGW_REG_ERROR;
+    } else {
+        return LGW_REG_SUCCESS;
+    }
+}
+
+/* --- EOF ------------------------------------------------------------------ */
diff --git a/libloragw/src/loragw_spi.native.c b/libloragw/src/loragw_spi.native.c
new file mode 100644
index 0000000..c01ed1c
--- /dev/null
+++ b/libloragw/src/loragw_spi.native.c
@@ -0,0 +1,385 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+  (C)2013 Semtech-Cycleo
+
+Description:
+    Host specific functions to address the LoRa concentrator registers through
+    a SPI interface.
+    Single-byte read/write and burst read/write.
+    Does not handle pagination.
+    Could be used with multiple SPI ports in parallel (explicit file descriptor)
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+Maintainer: Sylvain Miermont
+*/
+
+
+/* -------------------------------------------------------------------------- */
+/* --- DEPENDANCIES --------------------------------------------------------- */
+
+#include <stdint.h>        /* C99 types */
+#include <stdio.h>        /* printf fprintf */
+#include <stdlib.h>        /* malloc free */
+#include <unistd.h>        /* lseek, close */
+#include <fcntl.h>        /* open */
+#include <string.h>        /* memset */
+
+#include <sys/ioctl.h>
+#include <linux/spi/spidev.h>
+
+#include "loragw_spi.h"
+#include "loragw_hal.h"
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
+#if DEBUG_SPI == 1
+    #define DEBUG_MSG(str)                fprintf(stderr, str)
+    #define DEBUG_PRINTF(fmt, args...)    fprintf(stderr,"%s:%d: "fmt, __FUNCTION__, __LINE__, args)
+    #define CHECK_NULL(a)                if(a==NULL){fprintf(stderr,"%s:%d: ERROR: NULL POINTER AS ARGUMENT\n", __FUNCTION__, __LINE__);return LGW_SPI_ERROR;}
+#else
+    #define DEBUG_MSG(str)
+    #define DEBUG_PRINTF(fmt, args...)
+    #define CHECK_NULL(a)                if(a==NULL){return LGW_SPI_ERROR;}
+#endif
+
+/* -------------------------------------------------------------------------- */
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define READ_ACCESS     0x00
+#define WRITE_ACCESS    0x80
+#define SPI_SPEED       8000000
+#define SPI_DEV_PATH    "/dev/spidev0.0"
+//#define SPI_DEV_PATH    "/dev/spidev32766.0"
+
+/* -------------------------------------------------------------------------- */
+/* --- PUBLIC FUNCTIONS DEFINITION ------------------------------------------ */
+
+/* SPI initialization and configuration */
+int lgw_spi_open(void **spi_target_ptr) {
+    int *spi_device = NULL;
+    int dev;
+    int a=0, b=0;
+    int i;
+
+    /* check input variables */
+    CHECK_NULL(spi_target_ptr); /* cannot be null, must point on a void pointer (*spi_target_ptr can be null) */
+
+    /* allocate memory for the device descriptor */
+    spi_device = malloc(sizeof(int));
+    if (spi_device == NULL) {
+        DEBUG_MSG("ERROR: MALLOC FAIL\n");
+        return LGW_SPI_ERROR;
+    }
+
+    /* open SPI device */
+    dev = open(SPI_DEV_PATH, O_RDWR);
+    if (dev < 0) {
+        DEBUG_PRINTF("ERROR: failed to open SPI device %s\n", SPI_DEV_PATH);
+        return LGW_SPI_ERROR;
+    }
+
+    /* setting SPI mode to 'mode 0' */
+    i = SPI_MODE_0;
+    a = ioctl(dev, SPI_IOC_WR_MODE, &i);
+    b = ioctl(dev, SPI_IOC_RD_MODE, &i);
+    if ((a < 0) || (b < 0)) {
+        DEBUG_MSG("ERROR: SPI PORT FAIL TO SET IN MODE 0\n");
+        close(dev);
+        free(spi_device);
+        return LGW_SPI_ERROR;
+    }
+
+    /* setting SPI max clk (in Hz) */
+    i = SPI_SPEED;
+    a = ioctl(dev, SPI_IOC_WR_MAX_SPEED_HZ, &i);
+    b = ioctl(dev, SPI_IOC_RD_MAX_SPEED_HZ, &i);
+    if ((a < 0) || (b < 0)) {
+        DEBUG_MSG("ERROR: SPI PORT FAIL TO SET MAX SPEED\n");
+        close(dev);
+        free(spi_device);
+        return LGW_SPI_ERROR;
+    }
+
+    /* setting SPI to MSB first */
+    i = 0;
+    a = ioctl(dev, SPI_IOC_WR_LSB_FIRST, &i);
+    b = ioctl(dev, SPI_IOC_RD_LSB_FIRST, &i);
+    if ((a < 0) || (b < 0)) {
+        DEBUG_MSG("ERROR: SPI PORT FAIL TO SET MSB FIRST\n");
+        close(dev);
+        free(spi_device);
+        return LGW_SPI_ERROR;
+    }
+
+    /* setting SPI to 8 bits per word */
+    i = 0;
+    a = ioctl(dev, SPI_IOC_WR_BITS_PER_WORD, &i);
+    b = ioctl(dev, SPI_IOC_RD_BITS_PER_WORD, &i);
+    if ((a < 0) || (b < 0)) {
+        DEBUG_MSG("ERROR: SPI PORT FAIL TO SET 8 BITS-PER-WORD\n");
+        close(dev);
+        return LGW_SPI_ERROR;
+    }
+
+    *spi_device = dev;
+    *spi_target_ptr = (void *)spi_device;
+    DEBUG_MSG("Note: SPI port opened and configured ok\n");
+    return LGW_SPI_SUCCESS;
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* SPI release */
+int lgw_spi_close(void *spi_target) {
+    int spi_device;
+    int a;
+
+    /* check input variables */
+    CHECK_NULL(spi_target);
+
+    /* close file & deallocate file descriptor */
+    spi_device = *(int *)spi_target; /* must check that spi_target is not null beforehand */
+    a = close(spi_device);
+    free(spi_target);
+
+    /* determine return code */
+    if (a < 0) {
+        DEBUG_MSG("ERROR: SPI PORT FAILED TO CLOSE\n");
+        return LGW_SPI_ERROR;
+    } else {
+        DEBUG_MSG("Note: SPI port closed\n");
+        return LGW_SPI_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Simple write */
+int lgw_spi_w(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, uint8_t address, uint8_t data) {
+    int spi_device;
+    uint8_t out_buf[3];
+    uint8_t command_size;
+    struct spi_ioc_transfer k;
+    int a;
+
+    /* check input variables */
+    CHECK_NULL(spi_target);
+    if ((address & 0x80) != 0) {
+        DEBUG_MSG("WARNING: SPI address > 127\n");
+    }
+
+    spi_device = *(int *)spi_target; /* must check that spi_target is not null beforehand */
+
+    /* prepare frame to be sent */
+    if (spi_mux_mode == LGW_SPI_MUX_MODE1) {
+        out_buf[0] = spi_mux_target;
+        out_buf[1] = WRITE_ACCESS | (address & 0x7F);
+        out_buf[2] = data;
+        command_size = 3;
+    } else {
+        out_buf[0] = WRITE_ACCESS | (address & 0x7F);
+        out_buf[1] = data;
+        command_size = 2;
+    }
+
+    /* I/O transaction */
+    memset(&k, 0, sizeof(k)); /* clear k */
+    k.tx_buf = (unsigned long) out_buf;
+    k.len = command_size;
+    k.speed_hz = SPI_SPEED;
+    k.cs_change = 0;
+    k.bits_per_word = 8;
+    a = ioctl(spi_device, SPI_IOC_MESSAGE(1), &k);
+
+    /* determine return code */
+    if (a != (int)k.len) {
+        DEBUG_MSG("ERROR: SPI WRITE FAILURE\n");
+        return LGW_SPI_ERROR;
+    } else {
+        DEBUG_MSG("Note: SPI write success\n");
+        return LGW_SPI_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Simple read */
+int lgw_spi_r(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, uint8_t address, uint8_t *data) {
+    int spi_device;
+    uint8_t out_buf[3];
+    uint8_t command_size;
+    uint8_t in_buf[ARRAY_SIZE(out_buf)];
+    struct spi_ioc_transfer k;
+    int a;
+
+    /* check input variables */
+    CHECK_NULL(spi_target);
+    if ((address & 0x80) != 0) {
+        DEBUG_MSG("WARNING: SPI address > 127\n");
+    }
+    CHECK_NULL(data);
+
+    spi_device = *(int *)spi_target; /* must check that spi_target is not null beforehand */
+
+    /* prepare frame to be sent */
+    if (spi_mux_mode == LGW_SPI_MUX_MODE1) {
+        out_buf[0] = spi_mux_target;
+        out_buf[1] = READ_ACCESS | (address & 0x7F);
+        out_buf[2] = 0x00;
+        command_size = 3;
+    } else {
+        out_buf[0] = READ_ACCESS | (address & 0x7F);
+        out_buf[1] = 0x00;
+        command_size = 2;
+    }
+
+    /* I/O transaction */
+    memset(&k, 0, sizeof(k)); /* clear k */
+    k.tx_buf = (unsigned long) out_buf;
+    k.rx_buf = (unsigned long) in_buf;
+    k.len = command_size;
+    k.cs_change = 0;
+    a = ioctl(spi_device, SPI_IOC_MESSAGE(1), &k);
+
+    /* determine return code */
+    if (a != (int)k.len) {
+        DEBUG_MSG("ERROR: SPI READ FAILURE\n");
+        return LGW_SPI_ERROR;
+    } else {
+        DEBUG_MSG("Note: SPI read success\n");
+        *data = in_buf[command_size - 1];
+        return LGW_SPI_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Burst (multiple-byte) write */
+int lgw_spi_wb(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, uint8_t address, uint8_t *data, uint16_t size) {
+    int spi_device;
+    uint8_t command[2];
+    uint8_t command_size;
+    struct spi_ioc_transfer k[2];
+    int size_to_do, chunk_size, offset;
+    int byte_transfered = 0;
+    int i;
+
+    /* check input parameters */
+    CHECK_NULL(spi_target);
+    if ((address & 0x80) != 0) {
+        DEBUG_MSG("WARNING: SPI address > 127\n");
+    }
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_SPI_ERROR;
+    }
+
+    spi_device = *(int *)spi_target; /* must check that spi_target is not null beforehand */
+
+    /* prepare command byte */
+    if (spi_mux_mode == LGW_SPI_MUX_MODE1) {
+        command[0] = spi_mux_target;
+        command[1] = WRITE_ACCESS | (address & 0x7F);
+        command_size = 2;
+    } else {
+        command[0] = WRITE_ACCESS | (address & 0x7F);
+        command_size = 1;
+    }
+    size_to_do = size;
+
+    /* I/O transaction */
+    memset(&k, 0, sizeof(k)); /* clear k */
+    k[0].tx_buf = (unsigned long) &command[0];
+    k[0].len = command_size;
+    k[0].cs_change = 0;
+    k[1].cs_change = 0;
+    for (i=0; size_to_do > 0; ++i) {
+        chunk_size = (size_to_do < LGW_BURST_CHUNK) ? size_to_do : LGW_BURST_CHUNK;
+        offset = i * LGW_BURST_CHUNK;
+        k[1].tx_buf = (unsigned long)(data + offset);
+        k[1].len = chunk_size;
+        byte_transfered += (ioctl(spi_device, SPI_IOC_MESSAGE(2), &k) - k[0].len );
+        DEBUG_PRINTF("BURST WRITE: to trans %d # chunk %d # transferred %d \n", size_to_do, chunk_size, byte_transfered);
+        size_to_do -= chunk_size; /* subtract the quantity of data already transferred */
+    }
+
+    /* determine return code */
+    if (byte_transfered != size) {
+        DEBUG_MSG("ERROR: SPI BURST WRITE FAILURE\n");
+        return LGW_SPI_ERROR;
+    } else {
+        DEBUG_MSG("Note: SPI burst write success\n");
+        return LGW_SPI_SUCCESS;
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+/* Burst (multiple-byte) read */
+int lgw_spi_rb(void *spi_target, uint8_t spi_mux_mode, uint8_t spi_mux_target, uint8_t address, uint8_t *data, uint16_t size) {
+    int spi_device;
+    uint8_t command[2];
+    uint8_t command_size;
+    struct spi_ioc_transfer k[2];
+    int size_to_do, chunk_size, offset;
+    int byte_transfered = 0;
+    int i;
+
+    /* check input parameters */
+    CHECK_NULL(spi_target);
+    if ((address & 0x80) != 0) {
+        DEBUG_MSG("WARNING: SPI address > 127\n");
+    }
+    CHECK_NULL(data);
+    if (size == 0) {
+        DEBUG_MSG("ERROR: BURST OF NULL LENGTH\n");
+        return LGW_SPI_ERROR;
+    }
+
+    spi_device = *(int *)spi_target; /* must check that spi_target is not null beforehand */
+
+    /* prepare command byte */
+    if (spi_mux_mode == LGW_SPI_MUX_MODE1) {
+        command[0] = spi_mux_target;
+        command[1] = READ_ACCESS | (address & 0x7F);
+        command_size = 2;
+    } else {
+        command[0] = READ_ACCESS | (address & 0x7F);
+        command_size = 1;
+    }
+    size_to_do = size;
+
+    /* I/O transaction */
+    memset(&k, 0, sizeof(k)); /* clear k */
+    k[0].tx_buf = (unsigned long) &command[0];
+    k[0].len = command_size;
+    k[0].cs_change = 0;
+    k[1].cs_change = 0;
+    for (i=0; size_to_do > 0; ++i) {
+        chunk_size = (size_to_do < LGW_BURST_CHUNK) ? size_to_do : LGW_BURST_CHUNK;
+        offset = i * LGW_BURST_CHUNK;
+        k[1].rx_buf = (unsigned long)(data + offset);
+        k[1].len = chunk_size;
+        byte_transfered += (ioctl(spi_device, SPI_IOC_MESSAGE(2), &k) - k[0].len );
+        DEBUG_PRINTF("BURST READ: to trans %d # chunk %d # transferred %d \n", size_to_do, chunk_size, byte_transfered);
+        size_to_do -= chunk_size;  /* subtract the quantity of data already transferred */
+    }
+
+    /* determine return code */
+    if (byte_transfered != size) {
+        DEBUG_MSG("ERROR: SPI BURST READ FAILURE\n");
+        return LGW_SPI_ERROR;
+    } else {
+        DEBUG_MSG("Note: SPI burst read success\n");
+        return LGW_SPI_SUCCESS;
+    }
+}
+
+/* --- EOF ------------------------------------------------------------------ */
-- 
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