From d14d5e0766f7190cd3f6d91003e8d3f356f91359 Mon Sep 17 00:00:00 2001
From: Harsh Sharma <harsh.sharma@multitech.com>
Date: Fri, 24 Jan 2020 13:57:31 -0600
Subject: Added spi path to util lbt test

---
 util_lbt_test/src/util_lbt_test.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/util_lbt_test/src/util_lbt_test.c b/util_lbt_test/src/util_lbt_test.c
index 1c8b185..16af7ac 100644
--- a/util_lbt_test/src/util_lbt_test.c
+++ b/util_lbt_test/src/util_lbt_test.c
@@ -31,12 +31,14 @@ Maintainer: Michael Coracin
 #include <signal.h>     /* sigaction */
 #include <unistd.h>     /* getopt access */
 #include <stdlib.h>     /* rand */
+#include <string.h>     /* strncmp */
 
 #include "loragw_aux.h"
 #include "loragw_reg.h"
 #include "loragw_hal.h"
 #include "loragw_radio.h"
 #include "loragw_fpga.h"
+#include "loragw_spi.h"
 
 /* -------------------------------------------------------------------------- */
 /* --- PRIVATE MACROS & CONSTANTS ------------------------------------------- */
@@ -76,10 +78,11 @@ static void sig_handler(int sigio) {
 void usage(void) {
     printf("Available options:\n");
     printf(" -h print this help\n");
-    printf(" -f <float> frequency in MHz of the first LBT channel\n");
-    printf(" -o <int>   offset in dB to be applied to the SX127x RSSI [-128..127]\n");
-    printf(" -r <int>   target RSSI: signal strength target used to detect if the channel is clear or not [-128..0]\n");
-    printf(" -s <uint>  scan time in µs for all 8 LBT channels [128,5000]\n");
+    printf(" -f <float>  frequency in MHz of the first LBT channel\n");
+    printf(" -o <int>    offset in dB to be applied to the SX127x RSSI [-128..127]\n");
+    printf(" -r <int>    target RSSI: signal strength target used to detect if the channel is clear or not [-128..0]\n");
+    printf(" -s <uint>   scan time in µs for all 8 LBT channels [128,5000]\n");
+    printf(" -p <string> path of SPIDEV e.g. /dev/spidev0.0\n");
 }
 
 /* -------------------------------------------------------------------------- */
@@ -89,7 +92,7 @@ int main(int argc, char **argv)
 {
     int i;
     int xi = 0;
-
+    char arg_s[64];
     /* in/out variables */
     double f1 = 0.0;
     uint32_t f_init = 0; /* in Hz */
@@ -105,7 +108,7 @@ int main(int argc, char **argv)
     uint32_t freq_offset;
 
     /* parse command line options */
-    while ((i = getopt (argc, argv, "h:f:s:r:o:")) != -1) {
+    while ((i = getopt (argc, argv, "h:f:s:r:o:p:")) != -1) {
         switch (i) {
             case 'h':
                 usage();
@@ -142,6 +145,16 @@ int main(int argc, char **argv)
                     rssi_target_dBm = xi;
                 }
                 break;
+            case 'p':
+                i = sscanf(optarg, "%s", arg_s);
+                if ((i != 1) || (strncmp(arg_s, "/dev/", 5 ) != 0)) {
+                    printf("ERROR: argument parsing of --path argument. Use -h to print help\n");
+                    return EXIT_FAILURE;
+                }
+                else {
+                    lgw_spi_set_path(arg_s);
+                }
+                break;
             case 'o': /* -o <int>  SX127x RSSI offset [-128..127] */
                 i = sscanf(optarg, "%i", &xi);
                 if((i != 1) || (xi < -128) || (xi > 127)) {
-- 
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