Buzzer Support for M5Stack

variants/m5stack_core/Speaker.cpp

@@ -0,0 +1,33 @@
+#include "Speaker.h"
+
+TONE::TONE(void) {
+  _volume = 5;
+  _begun = false;
+}
+
+void TONE::begin() {
+  _begun = true;
+  ledcSetup(TONE_PIN_CHANNEL, 0, 13);
+  ledcAttachPin(PIN_BUZZER, TONE_PIN_CHANNEL);
+}
+
+void TONE::end() {
+  mute();
+  ledcDetachPin(PIN_BUZZER);
+  _begun = false;
+}
+
+void TONE::tone(uint16_t frequency) {
+  if(!_begun) begin();
+  ledcWriteTone(TONE_PIN_CHANNEL, frequency);
+  ledcWrite(TONE_PIN_CHANNEL, 0x400 >> _volume);
+}
+
+void TONE::setVolume(uint8_t volume) {
+  _volume = 11 - volume;
+}
+
+void TONE::mute() {
+  ledcWriteTone(TONE_PIN_CHANNEL, 0);
+  digitalWrite(PIN_BUZZER, 0);
+}