Implement the CA command to get/set the M17 channel access number

openrtx/src/core/rtxlink_cat.c

@@ -51,6 +51,7 @@ enum catCommand
     CAT_OP_MODE      = 0x4F4D,
     CAT_M17_CALLSIGN = 0x4D43,
     CAT_M17_DEST     = 0x4D44,
+    CAT_M17_CAN      = 0x4341,
     CAT_PTT          = 0x5054,
 
     // Miscellaneous CAT command
@@ -160,6 +161,13 @@ static size_t catCommandGet(const uint8_t *args, const size_t len,
             ret += sizeof(status.M17_dst);
             break;
 
+        case CAT_M17_CAN:
+
+            status = rtx_getCurrentStatus();
+            reply[1] = status.can;
+            ret += 1;
+            break;
+
         default:
             reply[0] = CAT_FRAME_ACK;
             reply[1] = EBADRQC;
@@ -290,6 +298,17 @@ static size_t catCommandSet(const uint8_t *args, const size_t len,
             catConfigureRtx();
             break;
 
+        case CAT_M17_CAN:
+
+            if (args[2] <= 15)
+            {
+                pthread_mutex_lock(&state_mutex);
+                state.settings.m17_can = args[2];
+                pthread_mutex_unlock(&state_mutex);
+                catConfigureRtx();
+            }
+            break;
+
         case CAT_POWER_CYCLE:
 
             // TODO: to be implemented