Changed tx power to be limited from max tx power variable

1 files changed, 9 insertions, 3 deletions

diff --git a/libloragw/src/loragw_hal.c b/libloragw/src/loragw_hal.c
index 48bc3b0..88bd874 100644
--- a/libloragw/src/loragw_hal.c
+++ b/libloragw/src/loragw_hal.c
@@ -135,6 +135,7 @@ static uint64_t fsk_sync_word= 0xC194C1; /* default FSK sync word (ALIGNED RIGHT
 
 static bool lorawan_public = false;
 static uint8_t rf_clkout = 0;
+static uint8_t max_tx_power = 32; /* default uncalibrated max tx power */
 
 static struct lgw_tx_gain_lut_s txgain_lut = {
     .size = 2,
@@ -423,8 +424,13 @@ int lgw_board_setconf(struct lgw_conf_board_s conf) {
     /* 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);
+    if (fpga_supports_attenuator()) {
+        max_tx_power = conf.max_tx_power;
+        printf("-------MAX TX POWER %d\n", max_tx_power);
+        DEBUG_PRINTF("Note: board configuration; lorawan_public:%d, clksrc:%d, max_tx_power:%d\n", lorawan_public, rf_clkout, max_tx_power);        
+    } else {
+        DEBUG_PRINTF("Note: board configuration; lorawan_public:%d, clksrc:%d \n", lorawan_public, rf_clkout);
+    }
 
     return LGW_HAL_SUCCESS;
 }
@@ -1418,7 +1424,7 @@ int lgw_send(struct lgw_pkt_tx_s pkt_data) {
         /* Power is set to max and the attenuator brings down the level to match the packet's request */
         target_mix_gain = 15;  /* Mixer gain is not used for setting power*/
         lgw_reg_w(LGW_TX_GAIN, 0);  /* Dig gain is not used for setting power */
-        x = lgw_set_attenuation((float)(32.0 - pkt_data.rf_power));
+        x = lgw_set_attenuation((float)(max_tx_power - pkt_data.rf_power));
         if (x != LGW_HAL_SUCCESS) {
             DEBUG_MSG("ERROR: Failed to set attenuation value\n");
             return LGW_HAL_ERROR;