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/*
* clock.c
*
* Created: 4/3/2024 10:29:19 AM
* Author: bsw9xd
*/
#include "clock.h"
void timer_init_ctc() {
TCCR1A = 0x00; //WGM10 = 0, WGM11 = 0 (CTC mode when combined with WGM12 in TCCR1B)
TCCR1B = (1 << WGM12);
TCNT1 = 0; // initialize timer at 0
}
void start_timer() {
TCNT1 = 0;
//OCRN1A = (seconds to wait / (prescaler / f_cpu))
OCR1A = 0x3d09; // we'll only need to delay 1 second
if(TIFR1 & (1 << OCF1A)) TIFR1 |= (1 << OCF1A); //discard possible compare match
TCCR1B |= (1<<CS12) | (1 << CS10); //start timer with 1024 prescaler
}
//disable timer
void stop_timer() {
if(TIFR1 & (1 << OCF1A)) TIFR1 |= (1 << OCF1A); //discard possible compare match
TIMSK1 = (1 << WGM12); //no clock source
}
//see if a second pas passed since start_timer
bool timer_done() {
return (TIFR1 & (1 << OCF1A)); //check if compare match
}
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