802.15.4 STM S2LP driver update

Sync with master v1.0.4

Author: Arto Kinnunen

components/802.15.4_RF/stm-s2lp-rf-driver/mbed_lib.json

@@ -5,10 +5,13 @@
             "help": "Provide default NanostackRfpy. [true/false]",
             "value": false
         },
-    "target_overrides": {
-        "MTB_STM_S2LP": {
-           "s2lp.provide-default": true
-         }
+        "target_overrides": {
+            "MTB_STM_S2LP": {
+               "s2lp.provide-default": true
+            },
+            "MTB_STM_S2LP_CT": {
+               "s2lp.provide-default": true
+            }
         }
     }
 }

components/802.15.4_RF/stm-s2lp-rf-driver/source/NanostackRfPhys2lp.cpp

@@ -207,6 +207,7 @@ static uint8_t s2lp_short_address[2];
 static uint8_t s2lp_MAC[8];
 static rf_mode_e rf_mode = RF_MODE_NORMAL;
 static bool rf_update_config = false;
+static bool rf_update_cca_threshold = false;
 static uint16_t cur_packet_len = 0xffff;
 static uint32_t receiver_ready_timestamp;
 static int16_t rssi_threshold = RSSI_THRESHOLD;
@@ -704,6 +705,13 @@ static int8_t rf_extension(phy_extension_type_e extension_type, uint8_t *data_pt
                 rf_receive(rf_rx_channel);
             }
             break;
+        case PHY_EXTENSION_SET_CHANNEL_CCA_THRESHOLD:
+            if ((rssi_threshold != (int8_t)*data_ptr) && (rf_state != RF_RX_STARTED)) {
+                rssi_threshold = (int8_t)*data_ptr;
+                rf_update_cca_threshold = true;
+                rf_receive(rf_rx_channel);
+            }
+            break;
         default:
             break;
     }
@@ -1047,6 +1055,12 @@ static void rf_receive(uint8_t rx_channel)
         rf_update_config = false;
         rf_set_channel_configuration_registers();
     }
+    if (rf_update_cca_threshold == true) {
+        rf_update_cca_threshold = false;
+        uint8_t rssi_th;
+        rf_conf_calculate_rssi_threshold_registers(rssi_threshold, &rssi_th);
+        rf_write_register(RSSI_TH, rssi_th);
+    }
     if (rx_channel != rf_rx_channel) {
         rf_write_register(CHNUM, rx_channel * rf_channel_multiplier);
         rf_rx_channel = rf_new_channel = rx_channel;

components/802.15.4_RF/stm-s2lp-rf-driver/stm-s2lp-rf-driver/NanostackRfPhys2lp.h

@@ -28,7 +28,7 @@
 // Uncomment to use testing gpios attached to TX/RX processes
 // #define TEST_GPIOS_ENABLED
 
-#if defined(TARGET_MTB_STM_S2LP)
+#if defined(TARGET_MTB_STM_S2LP) || defined(TARGET_MTB_STM_S2LP_CT)
 #if !defined(S2LP_SPI_SDI)
 #define S2LP_SPI_SDI        PA_7
 #endif