MAC stabilisation fixes (#2591)

* Do not reset CCA count in "no Ack"

* Do not stop TX poll timer

Author: Jarkko Paso

source/MAC/IEEE802_15_4/mac_pd_sap.c

@@ -385,6 +385,7 @@ static void mac_sap_no_ack_cb(protocol_interface_rf_mac_setup_s *rf_ptr)
 #endif
     rf_ptr->macRfRadioTxActive = false;
     if (rf_ptr->mac_tx_retry < rf_ptr->mac_mlme_retry_max) {
+        rf_ptr->mac_cca_retry = 0;
         rf_ptr->mac_tx_retry++; //Update retry counter
         mac_csma_param_init(rf_ptr);
         // Increase current backoff exponent when retry count grows

source/Service_Libs/fhss/fhss_ws.c

@@ -1029,9 +1029,7 @@ int fhss_ws_set_parent(fhss_structure_t *fhss_structure, const uint8_t eui64[8],
         return 0;
     }
     platform_enter_critical();
-    if (fhss_structure->ws->broadcast_timer_running == false) {
-        eventOS_callback_timer_stop(fhss_structure->fhss_event_timer);
-    }
+
     uint16_t own_bc_slot = fhss_structure->ws->bc_slot;
     uint32_t prev_synchronization_time = fhss_structure->ws->synchronization_time;
     fhss_structure->ws->synchronization_time = fhss_structure->callbacks.read_timestamp(fhss_structure->fhss_api);
@@ -1143,8 +1141,6 @@ int fhss_ws_configuration_set(fhss_structure_t *fhss_structure, const fhss_ws_co
     // No one would poll TX queue if schedule timers were not started. Start poll timer with 10ms (200*50us) interval.
     if ((fhss_structure->ws->unicast_timer_running == false) && (fhss_structure->ws->broadcast_timer_running == false)) {
         eventOS_callback_timer_start(fhss_structure->fhss_event_timer, 200);
-    } else {
-        eventOS_callback_timer_stop(fhss_structure->fhss_event_timer);
     }
 
     fhss_structure->number_of_channels = fhss_configuration->channel_mask_size;