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