Added tone support

src/BuildOpt.h

@@ -18,6 +18,7 @@
  * RADIOLIB_NC - alias for unused pin, usually the largest possible value of RADIOLIB_PIN_TYPE.
  * RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED - defined if the specific platform does not support SoftwareSerial.
  * RADIOLIB_HARDWARE_SERIAL_PORT - which hardware serial port should be used on platform that do not have SoftwareSerial support.
+ * RADIOLIB_TONE_UNSUPPORTED - some platforms do not have tone()/noTone(), which is required for AFSK.
  *
  * In addition, some platforms may require RadioLib to disable specific drivers (such as ESP8266).
  */
@@ -52,6 +53,7 @@
   #define RADIOLIB_NC                                 (0xFF)
   #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED
   #define RADIOLIB_HARDWARE_SERIAL_PORT               Serial1
+  #define RADIOLIB_TONE_UNSUPPORTED
 
 #elif defined(ARDUINO_ARCH_STM32)
   // official STM32 Arduino core (https://github.com/stm32duino/Arduino_Core_STM32)
@@ -85,6 +87,7 @@
   #define RADIOLIB_NC                                 (0xFFFFFFFF)
   #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED
   #define RADIOLIB_HARDWARE_SERIAL_PORT               Serial1
+  #define RADIOLIB_TONE_UNSUPPORTED
 
 #elif (defined(NRF52832_XXAA) || defined(NRF52840_XXAA)) && !defined(ARDUINO_ARDUINO_NANO33BLE)
   // Adafruit nRF52 boards
@@ -123,6 +126,7 @@
   #define RADIOLIB_NC                                 (0xFF)
   #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED
   #define RADIOLIB_HARDWARE_SERIAL_PORT               Serial1
+  #define RADIOLIB_TONE_UNSUPPORTED
 
 #elif defined(ARDUINO_ARDUINO_NANO33BLE)
   // Arduino Nano 33 BLE
@@ -148,6 +152,7 @@
   #define RADIOLIB_NC                                 (0xFF)
   #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED
   #define RADIOLIB_HARDWARE_SERIAL_PORT               Serial1
+  #define RADIOLIB_TONE_UNSUPPORTED
 
 #else
   // other platforms not covered by the above list - this may or may not work

src/Module.cpp

@@ -294,3 +294,19 @@ RADIOLIB_PIN_STATUS Module::digitalRead(RADIOLIB_PIN_TYPE pin) {
   }
   return(LOW);
 }
+
+void Module::tone(RADIOLIB_PIN_TYPE pin, uint16_t value) {
+  #ifndef RADIOLIB_TONE_UNSUPPORTED
+  if(pin != RADIOLIB_NC) {
+    ::tone(pin, value);
+  }
+  #endif
+}
+
+void Module::noTone(RADIOLIB_PIN_TYPE pin) {
+  #ifndef RADIOLIB_TONE_UNSUPPORTED
+  if(pin != RADIOLIB_NC) {
+    ::noTone(pin);
+  }
+  #endif
+}

src/Module.h

@@ -368,6 +368,22 @@ class Module {
     */
     static RADIOLIB_PIN_STATUS digitalRead(RADIOLIB_PIN_TYPE pin);
 
+    /*!
+      \brief Arduino core tone override that checks RADIOLIB_NC as alias for unused pin and RADIOLIB_TONE_UNSUPPORTED to make sure the platform does support tone.
+
+      \param pin Pin to write to.
+
+      \param value Frequency to output.
+    */
+    static void tone(RADIOLIB_PIN_TYPE pin, uint16_t value);
+
+    /*!
+      \brief Arduino core noTone override that checks RADIOLIB_NC as alias for unused pin and RADIOLIB_TONE_UNSUPPORTED to make sure the platform does support tone.
+
+      \param pin Pin to write to.
+    */
+    static void noTone(RADIOLIB_PIN_TYPE pin);
+
 #ifndef RADIOLIB_GODMODE
   private:
 #endif