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Buzzer.c
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Buzzer.c
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/*
* Buzzer.c
*
* Created: 2021-04-25 11:14:47
* Author: Edvin
*/
#include <avr/io.h>
#include "GlobalDefinitions.h"
#include "buzzer.h"
#include <util/delay.h>
/*********************************/
/* Initializes buzzer. */
/*********************************/
void buzzerInit(){
// Set output port.
SETBIT(DDRD, OUTPUT);
// Set output to low.
CLEARBIT(PORTD, OUTPUT);
// Set timer mode normal and toggle OC0A on compare.
TCCR0A = (1 << WGM01) | (1 << COM0A0) ;
TCCR0B = (1 << CS01) | (1 << CS00);
}
/*****************************************************/
/* Makes summer buzz at given frequency. */
/*****************************************************/
void setBuzzer(int freq){
OCR0A = freq;
}
/*****************************************************************/
/* Plays a melody by playing at different frequencies. */
/*****************************************************************/
void playMelody() {
setBuzzer(100);
_delay_ms(100);
setBuzzer(200);
_delay_ms(100);
setBuzzer(300);
_delay_ms(100);
setBuzzer(400);
_delay_ms(100);
}