Speaker.cpp

#include "Speaker.h"

SPEAKER::SPEAKER(void) {
  _volume = 8;
  _begun = false;
}

void SPEAKER::begin() {
  _begun = true;
  ledcSetup(TONE_PIN_CHANNEL, 0, 13);
  ledcAttachPin(SPEAKER_PIN, TONE_PIN_CHANNEL);
  setBeep(1000, 100);
}

void SPEAKER::end() {
  mute();
  ledcDetachPin(SPEAKER_PIN);
  _begun = false;
}

void SPEAKER::tone(uint16_t frequency) {
  if(!_begun) begin();
  ledcWriteTone(TONE_PIN_CHANNEL, frequency);
  ledcWrite(TONE_PIN_CHANNEL, 0x400 >> _volume);
}

void SPEAKER::tone(uint16_t frequency, uint32_t duration) {
  tone(frequency);
  _count = millis() + duration;
  speaker_on = 1;
}

void SPEAKER::beep() {
  if(!_begun) begin();
  tone(_beep_freq, _beep_duration);
}

void SPEAKER::setBeep(uint16_t frequency, uint16_t duration) {
  _beep_freq = frequency;
  _beep_duration = duration;
}

void SPEAKER::setVolume(uint8_t volume) {
  _volume = 11 - volume;
}

void SPEAKER::mute() {
  ledcWriteTone(TONE_PIN_CHANNEL, 0);
  digitalWrite(SPEAKER_PIN, 0);
}

void SPEAKER::update() {
  if(speaker_on) {
    if(millis() > _count) {
      speaker_on = 0;
      mute();
    }
  }
}

void SPEAKER::write(uint8_t value) {
  dacWrite(SPEAKER_PIN, value);
}

void SPEAKER::playMusic(const uint8_t* music_data, uint16_t sample_rate) {
  uint32_t length = strlen((char*)music_data);
  uint16_t delay_interval = ((uint32_t)1000000 / sample_rate);
  if(_volume != 11) {
    for(int i = 0; i < length; i++) {
      dacWrite(SPEAKER_PIN, music_data[i] / _volume);
      delayMicroseconds(delay_interval);
    }

    for(int t = music_data[length - 1] / _volume; t >= 0; t--) {
      dacWrite(SPEAKER_PIN, t);
      delay(2);
    }
  }
  // ledcSetup(TONE_PIN_CHANNEL, 0, 13);
  ledcAttachPin(SPEAKER_PIN, TONE_PIN_CHANNEL);
}