MAC: Use minimum CSMA for Asynch

artokin · Apr 8, 2019 · aab7191 · aab7191
1 parent 47f65aa
commit aab7191
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/source/MAC/IEEE802_15_4/mac_pd_sap.c b/source/MAC/IEEE802_15_4/mac_pd_sap.c
@@ -83,6 +83,10 @@ void mac_csma_backoff_start(protocol_interface_rf_mac_setup_s *rf_mac_setup)
 
 uint32_t mac_csma_backoff_get(protocol_interface_rf_mac_setup_s *rf_mac_setup)
 {
+    // Use minimum allowed CSMA-CA for asynch frames
+    if (rf_mac_setup->active_pd_data_request->asynch_request) {
+        return MIN_FHSS_CSMA_PERIOD_US;
+    }
     uint8_t backoff = mac_csma_random_backoff_get(rf_mac_setup);
     uint32_t backoff_in_us;
     //Multiple aUnitBackoffPeriod symbol time