Added API function allowing to query the current status of the RX audio squelch

openrtx/include/rtx/OpMode.h

@@ -88,6 +88,16 @@ public:
     {
         return NONE;
     }
+
+    /**
+     * Check if RX squelch is open.
+     *
+     * @return true if RX squelch is open.
+     */
+    virtual bool rxSquelchOpen()
+    {
+        return false;
+    }
 };
 
 #endif /* OPMODE_H */

openrtx/include/rtx/OpMode_FM.h

@@ -81,6 +81,13 @@ public:
         return FM;
     }
 
+    /**
+     * Check if RX squelch is open.
+     *
+     * @return true if RX squelch is open.
+     */
+    virtual bool rxSquelchOpen() override;
+
 private:
 
     bool rfSqlOpen; ///< Flag for RF squelch status (analog squelch).

openrtx/include/rtx/OpMode_M17.h

@@ -83,6 +83,16 @@ public:
         return M17;
     }
 
+    /**
+     * Check if RX squelch is open.
+     *
+     * @return true if RX squelch is open.
+     */
+    virtual bool rxSquelchOpen() override
+    {
+        return false;
+    }
+
 private:
 
     /**

openrtx/include/rtx/rtx.h

@@ -131,6 +131,13 @@ void rtx_taskFunc();
  */
 float rtx_getRssi();
 
+/**
+ * Get current status of the RX squelch. This function is thread-safe and can
+ * be called also from threads other than the one running the RTX task.
+ * @return true if RX squelch is open.
+ */
+bool rtx_rxSquelchOpen();
+
 #ifdef __cplusplus
 }
 #endif

openrtx/src/rtx/OpMode_FM.cpp

@@ -194,3 +194,8 @@ void OpMode_FM::update(rtxStatus_t *const status, const bool newCfg)
     // Sleep thread for 30ms for 33Hz update rate
     sleepFor(0u, 30u);
 }
+
+bool OpMode_FM::rxSquelchOpen()
+{
+    return sqlOpen;
+}

openrtx/src/rtx/rtx.cpp

@@ -207,3 +207,8 @@ float rtx_getRssi()
 {
     return rssi;
 }
+
+bool rtx_rxSquelchOpen()
+{
+    return currMode->rxSquelchOpen();
+}