Created validate TX time handler (ARMmbed#2423)

Author: Jarkko Paso

source/MAC/IEEE802_15_4/mac_pd_sap.c

@@ -456,10 +456,7 @@ static int8_t mac_data_interface_tx_done_cb(protocol_interface_rf_mac_setup_s *r
         if (rf_ptr->mac_ack_tx_active) {
             //Accept direct non crypted acks and crypted only if neighbor is at list
             if (rf_ptr->ack_tx_possible) {
-#ifdef TIMING_TOOL_TRACES
-                tr_info("%u TX_start %u", mac_mcps_sap_get_phy_timestamp(rf_ptr), rf_ptr->mac_channel);
-#endif
-                return PHY_TX_ALLOWED;
+                goto VALIDATE_TX_TIME;
             }
 
             //Compare time to started time
@@ -471,19 +468,16 @@ static int8_t mac_data_interface_tx_done_cb(protocol_interface_rf_mac_setup_s *r
         }
 
         if (rf_ptr->mac_edfe_tx_active) {
-            return PHY_TX_ALLOWED;
+            goto VALIDATE_TX_TIME;
         }
 
         if (mac_data_asynch_channel_switch(rf_ptr, rf_ptr->active_pd_data_request)) {
-#ifdef TIMING_TOOL_TRACES
-            tr_info("%u TX_start %u", mac_mcps_sap_get_phy_timestamp(rf_ptr), rf_ptr->mac_channel);
-#endif
             rf_ptr->active_pd_data_request->initial_tx_channel = rf_ptr->mac_channel;
             int8_t channel_cca_threshold = mac_cca_thr_get_dbm(rf_ptr, rf_ptr->mac_channel);
             if (CCA_FAILED_DBM != channel_cca_threshold) {
                 rf_ptr->dev_driver->phy_driver->extension(PHY_EXTENSION_SET_CHANNEL_CCA_THRESHOLD, (uint8_t *)&channel_cca_threshold);
             }
-            return PHY_TX_ALLOWED;
+            goto VALIDATE_TX_TIME;
         }
 
         if (rf_ptr->fhss_api) {
@@ -525,10 +519,12 @@ static int8_t mac_data_interface_tx_done_cb(protocol_interface_rf_mac_setup_s *r
                 return PHY_RESTART_CSMA;
             }
         }
+VALIDATE_TX_TIME:
+// TODO: Validate TX time here
 #ifdef TIMING_TOOL_TRACES
         tr_info("%u TX_start %u", mac_mcps_sap_get_phy_timestamp(rf_ptr), rf_ptr->mac_channel);
 #endif
-        return 0;
+        return PHY_TX_ALLOWED;
     }
 
     if (rf_ptr->mac_ack_tx_active) {