First draft for implementing support for ESP32.

examples/ESP32Rtttl/ESP32Rtttl.ino

@@ -0,0 +1,62 @@
+#include <anyrtttl.h>
+#include <binrtttl.h>
+#include <pitches.h>
+
+//project's constants
+#define BUZZER_PIN 8
+const char tetris[] PROGMEM = "tetris:d=4,o=5,b=160:e6,8b,8c6,8d6,16e6,16d6,8c6,8b,a,8a,8c6,e6,8d6,8c6,b,8b,8c6,d6,e6,c6,a,2a,8p,d6,8f6,a6,8g6,8f6,e6,8e6,8c6,e6,8d6,8c6,b,8b,8c6,d6,e6,c6,a,a";
+const char arkanoid[] PROGMEM = "Arkanoid:d=4,o=5,b=140:8g6,16p,16g.6,2a#6,32p,8a6,8g6,8f6,8a6,2g6";
+const char mario[] PROGMEM = "mario:d=4,o=5,b=140:16e6,16e6,32p,8e6,16c6,8e6,8g6,8p,8g,8p,8c6,16p,8g,16p,8e,16p,8a,8b,16a#,8a,16g.,16e6,16g6,8a6,16f6,8g6,8e6,16c6,16d6,8b,16p,8c6,16p,8g,16p,8e,16p,8a,8b,16a#,8a,16g.,16e6,16g6,8a6,16f6,8g6,8e6,16c6,16d6,8b,8p,16g6,16f#6,16f6,16d#6,16p,16e6,16p,16g#,16a,16c6,16p,16a,16c6,16d6,8p,16g6,16f#6,16f6,16d#6,16p,16e6,16p,16c7,16p,16c7,16c7,p,16g6,16f#6,16f6,16d#6,16p,16e6,16p,16g#,16a,16c6,16p,16a,16c6,16d6,8p,16d#6,8p,16d6,8p,16c6";
+// James Bond theme defined in inline code below (also stored in flash memory) 
+
+// tone() and noTone() are not implemented for Arduino core for the ESP32
+// See https://github.com/espressif/arduino-esp32/issues/980
+// and https://github.com/espressif/arduino-esp32/issues/1720
+void esp32NoTone(uint8_t pin) {
+  // don't care about the given pin
+  ledcWrite(0, 0); // channel, volume
+}
+
+void esp32Tone(uint8_t pin, unsigned int frq, unsigned long duration) {
+  // don't care about the given pin or the duration
+  ledcWriteTone(0, frq); // channel, freq
+  ledcWrite(0, 255); // channel, volume
+}
+
+void esp32ToneSetup(uint8_t pin) {
+  ledcSetup(0, 1000, 10); // resolution always seems to be 10bit, no matter what is given
+  ledcAttachPin(pin, 0);
+}
+
+void setup() {
+  pinMode(BUZZER_PIN, OUTPUT);
+
+  // setup AnyRtttl for ESP32
+  esp32ToneSetup(BUZZER_PIN);
+  anyrtttl::setToneFunction(&esp32Tone);
+  anyrtttl::setNoToneFunction(&esp32NoTone);
+
+  Serial.begin(115200);
+
+  Serial.println("ready");
+}
+
+void loop() {
+  anyrtttl::blocking::playProgMem(BUZZER_PIN, tetris);
+  delay(1000);
+
+  anyrtttl::blocking::play_P(BUZZER_PIN, arkanoid);
+  delay(1000);
+
+#if defined(ESP8266) || defined(ESP32)
+  anyrtttl::blocking::play(BUZZER_PIN, FPSTR(mario));
+  delay(1000);
+#endif
+
+  anyrtttl::blocking::play(BUZZER_PIN, F("Bond:d=4,o=5,b=80:32p,16c#6,32d#6,32d#6,16d#6,8d#6,16c#6,16c#6,16c#6,16c#6,32e6,32e6,16e6,8e6,16d#6,16d#6,16d#6,16c#6,32d#6,32d#6,16d#6,8d#6,16c#6,16c#6,16c#6,16c#6,32e6,32e6,16e6,8e6,16d#6,16d6,16c#6,16c#7,c.7,16g#6,16f#6,g#.6"));
+  delay(1000);
+
+  while(true)
+  {
+  }
+}

src/anyrtttl.h

@@ -40,7 +40,11 @@ typedef void (*NoToneFuncPtr)(uint8_t);
  * Description:
  *   Defines a function pointer to a delay() function
  ****************************************************************************/
+#if defined(ESP32)
+typedef void (*DelayFuncPtr)(uint32_t);
+#else
 typedef void (*DelayFuncPtr)(unsigned long);
+#endif
 
 /****************************************************************************
  * Description: