Arduboy2Beep.cpp

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#include <Arduino.h>
#include "Arduboy2Beep.h"
 
#ifndef AB_DEVKIT
 
// Speaker pin 1, Timer 3A, Port C bit 6, Arduino pin 5
 
uint8_t BeepPin1::duration = 0;
 
void BeepPin1::begin()
{
  TCCR3A = 0;
  TCCR3B = (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;
  TCCR3A = bit(COM3A0); // set toggle on compare mode (which connects the pin)
  OCR3A = count; // load the count (16 bits), which determines the frequency
}
 
void BeepPin1::timer()
{
  if (duration && (--duration == 0)) {
    TCCR3A = 0; // set normal mode (which disconnects the pin)
  }
}
 
void BeepPin1::noTone()
{
  duration = 0;
  TCCR3A = 0; // set normal mode (which disconnects the pin)
}
 
 
// Speaker pin 2, Timer 4A, Port C bit 7, Arduino pin 13
 
uint8_t BeepPin2::duration = 0;
 
void BeepPin2::begin()
{
  TCCR4A = 0; // normal mode. Disable PWM
  TCCR4B = bit(CS43); // divide by 128 clock prescale
  TCCR4D = 0; // normal mode
  TC4H = 0;  // toggle pin at count = 0
  OCR4A = 0; //  "
}
 
void BeepPin2::tone(uint16_t count)
{
  tone(count, 0);
}
 
void BeepPin2::tone(uint16_t count, uint8_t dur)
{
  duration = dur;
  TCCR4A = bit(COM4A0); // set toggle on compare mode (which connects the pin)
  TC4H = highByte(count); // load the count (10 bits),
  OCR4C = lowByte(count); //  which determines the frequency
}
 
void BeepPin2::timer()
{
  if (duration && (--duration == 0)) {
    TCCR4A = 0; // set normal mode (which disconnects the pin)
  }
}
 
void BeepPin2::noTone()
{
  duration = 0;
  TCCR4A = 0; // set normal mode (which disconnects the pin)
}
 
 
#else /* AB_DEVKIT */
 
// *** The pins used for the speaker on the DevKit cannot be directly
// controlled by a timer/counter. The following "dummy" functions will
// compile and operate properly but no sound will be produced
 
uint8_t BeepPin1::duration = 0;
 
void BeepPin1::begin()
{
}
 
void BeepPin1::tone(uint16_t count)
{
  tone(count, 0);
}
 
void BeepPin1::tone(uint16_t count, uint8_t dur)
{
  (void) count; // parameter not used
 
  duration = dur;
}
 
void BeepPin1::timer()
{
  if (duration) {
    --duration;
  }
}
 
void BeepPin1::noTone()
{
  duration = 0;
}
 
 
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;
}
 
#endif