Fix M17 callsign management

Now a default callsign "OPNRTX" is used in M17 mode, and when the user
sets its own callsign in the settings menu, that one is correctly used
instead. Add initialization to RTX data structure.

openrtx/src/rtx/OpMode_M17.cpp

@@ -77,9 +77,9 @@ void OpMode_M17::update(rtxStatus_t *const status, const bool newCfg)
             audio_enableMic();
             radio_enableTx();
 
-            // TODO: Allow destinations different than broadcast
-            std::string source_address("OPNRTX");
-            m17Tx.start(source_address);
+            std::string source_address(status->source_address);
+            std::string destination_address(status->destination_address);
+            m17Tx.start(source_address, destination_address);
 
             status->opStatus = TX;
         }

openrtx/src/rtx/rtx.cpp

@@ -24,18 +24,18 @@
 #include <OpMode_FM.h>
 #include <OpMode_M17.h>
 
-pthread_mutex_t *cfgMutex;  // Mutex for incoming config messages
+pthread_mutex_t *cfgMutex;      // Mutex for incoming config messages
 
-const rtxStatus_t *newCnf;  // Pointer for incoming config messages
-rtxStatus_t rtxStatus;      // RTX driver status
+const rtxStatus_t *newCnf;      // Pointer for incoming config messages
+rtxStatus_t rtxStatus = { 0 };  // RTX driver status
 
-float rssi;                 // Current RSSI in dBm
-bool  reinitFilter;         // Flag for RSSI filter re-initialisation
+float rssi;                     // Current RSSI in dBm
+bool  reinitFilter;             // Flag for RSSI filter re-initialisation
 
-OpMode  *currMode;          // Pointer to currently active opMode handler
-OpMode     noMode;          // Empty opMode handler for opmode::NONE
-OpMode_FM  fmMode;          // FM mode handler
-OpMode_M17 m17Mode;         // M17 mode handler
+OpMode  *currMode;              // Pointer to currently active opMode handler
+OpMode     noMode;              // Empty opMode handler for opmode::NONE
+OpMode_FM  fmMode;              // FM mode handler
+OpMode_M17 m17Mode;             // M17 mode handler
 
 void rtx_init(pthread_mutex_t *m)
 {

openrtx/src/state.c

@@ -82,6 +82,9 @@ void state_init()
 
     state.emergency = false;
 
+    // Initialize M17_data
+    strncpy(state.m17_data.callsign, "OPNRTX", 10);
+
     // Read settings from flash memory
     // NOTE: Disable reading VFO from flash until persistence is implemented
     //int valid = nvm_readSettings(&state.settings);

openrtx/src/threads.c

@@ -103,6 +103,10 @@ void *ui_task(void *arg)
             rtx_cfg.txTone = ctcss_tone[state.channel.fm.txTone];
             pthread_mutex_unlock(&rtx_mutex);
 
+            // Copy new M17 source and destination addresses
+            strncpy(rtx_cfg.source_address, state.m17_data.callsign, 10);
+            strncpy(rtx_cfg.destination_address, "", 10);
+
             rtx_configure(&rtx_cfg);
             sync_rtx = false;
         }

openrtx/src/ui/ui.c

@@ -1324,8 +1324,9 @@ void ui_updateFSM(event_t event, bool *sync_rtx)
                     {
                         _ui_textInputConfirm(ui_state.new_callsign);
                         // Save selected callsign and disable input mode
-                        strcpy(state.m17_data.callsign, ui_state.new_callsign);
+                        strncpy(state.m17_data.callsign, ui_state.new_callsign, 10);
                         ui_state.edit_mode = false;
+                        *sync_rtx = true;
                     }
                     else if(msg.keys & KEY_ESC)
                         // Discard selected callsign and disable input mode