/**
 * @file Arduboy2Beep.cpp
 * \brief
 * Classes to generate simple square wave tones on the Arduboy speaker pins.
 */

#include <Arduino.h>
#include "Arduboy2Beep.h"

// Speaker pin, Timer 1A, Port B bit 5, Arduino pin 9

uint8_t BeepPin1::duration = 0;

void BeepPin1::begin()
{
  TCCR1A = 0;
  TCCR1B = (bit(WGM32) | bit(CS31)); // CTC mode. Divide by 8 clock prescale
}

void BeepPin1::tone(uint16_t count)
{
  tone(count, 0);
}

void BeepPin1::tone(uint16_t count, uint8_t dur)
{
  duration = dur;
  TCCR1A = bit(COM1A0); // set toggle on compare mode (which connects the pin)
  OCR1A = count; // load the count (16 bits), which determines the frequency
}

void BeepPin1::timer()
{
  if (duration && (--duration == 0)) {
    TCCR1A = 0; // set normal mode (which disconnects the pin)
  }
}

void BeepPin1::noTone()
{
  duration = 0;
  TCCR1A = 0; // set normal mode (which disconnects the pin)
}

// The following "dummy" function will compile and
// operate properly but no sound will be produced

uint8_t BeepPin2::duration = 0;

void BeepPin2::begin()
{
}

void BeepPin2::tone(uint16_t count)
{
  tone(count, 0);
}

void BeepPin2::tone(uint16_t count, uint8_t dur)
{
  (void) count; // parameter not used

  duration = dur;
}

void BeepPin2::timer()
{
  if (duration) {
    --duration;
  }
}

void BeepPin2::noTone()
{
  duration = 0;
}