Changed attenuation setup to be the difference between the LUT power and the tx packet power and make it automatically set

1 files changed, 22 insertions, 11 deletions

diff --git a/libloragw/src/loragw_fpga.c b/libloragw/src/loragw_fpga.c
index 1379679..ce1c9c6 100644
--- a/libloragw/src/loragw_fpga.c
+++ b/libloragw/src/loragw_fpga.c
@@ -130,7 +130,7 @@ float lgw_fpga_get_tx_notch_delay(void) {
 
 /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
 
-int lgw_fpga_configure(uint32_t tx_notch_freq, bool fpga_attn_used) {
+int lgw_fpga_configure(uint32_t tx_notch_freq) {
     int x;
     int32_t val;
     bool spectral_scan_support, lbt_support;
@@ -175,17 +175,9 @@ int lgw_fpga_configure(uint32_t tx_notch_freq, bool fpga_attn_used) {
             DEBUG_MSG("ERROR: Failed to configure FPGA polarity\n");
             return LGW_REG_ERROR;
         }
-        /* Set Attenuator mode to be used or not depending on if a full card with valid conf settings are given*/
+        /* Set Attenuator mode to be used for the full card*/
         if (fpga_version == 32) {
-            if (fpga_attn_used == true) {
-                lgw_reg_w(LGW_FPGA_RF_ATTN_MODE, 0); 
-                printf("INFO: Valid attenuation settings detected. Using Attenuator mode\n");
-            } else {
-                printf("INFO: Valid attenuation settings not detected. Using Legacy mode\n");
-                lgw_reg_w(LGW_FPGA_RF_ATTN_MODE, 1);
-            }
-        } else {
-            lgw_reg_w(LGW_FPGA_RF_ATTN_MODE, 1);
+            lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_MODE, 0);
         }
     }
 
@@ -367,4 +359,23 @@ int lgw_fpga_reg_rb(uint16_t register_id, uint8_t *data, uint16_t size) {
     }
 }
 
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+int lgw_set_attenuation(float attenuation) {
+    int i;
+    int32_t val;
+    if (attenuation > 31.75 || attenuation < 0) {
+        return LGW_HAL_ERROR;
+    }
+    i = lgw_fpga_reg_w(LGW_FPGA_RF_ATTN_VALUE, (uint8_t)(attenuation * LGW_RF_ATTN_CONV_CONST));
+
+    i = lgw_fpga_reg_r(LGW_FPGA_RF_ATTN_VALUE, &val);
+    if (i == LGW_REG_SUCCESS) {
+        DEBUG_PRINTF("INFO: Attenuator set to %u \n", (uint8_t)val);
+        return LGW_HAL_SUCCESS;
+    } else {
+        return LGW_HAL_ERROR;
+    }
+}
+
 /* --- EOF ------------------------------------------------------------------ */