/**************************************************************************/

/*!

@file tone.c

@author ChrisMicro

@brief sound generator

@section LICENSE see below for my code contribution

*/

/**************************************************************************/

#include "arduino.h"

#include "tone.h"

#include "mrt.h"

uint8_t TonePin;

void arduinoSound(uint16_t frequency, uint16_t duration_ms)

{

uint16_t n;

uint32_t delay_us;

delay_us=1000000UL/frequency/2;

//cli();

for(n=0;n<(duration_ms*1000/delay_us);n++)

{

digitalToggle(TonePin);

delayMicroseconds(delay_us);

}

//sei();

}

void tone(uint8_t pin, uint32_t frequency, uint16_t duration_ms)

{

pinMode(pin, OUTPUT);

TonePin=pin;

arduinoSound(frequency, duration_ms);

}

void noTone(uint8_t pin)

{

// tbd

}