43 lines
632 B
C
43 lines
632 B
C
// from avr-uip
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include <avr/sfr_defs.h>
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#include "clock-arch.h"
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//Counted time
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clock_time_t clock_datetime = 0;
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//Overflow itnerrupt
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ISR(TIMER0_OVF_vect)
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{
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clock_datetime += 1;
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TIFR0 |= (1<<TOV0);
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}
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//Initialise the clock
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void clock_init(){
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//Activate overflow interrupt for timer0
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TIMSK0 |= (1<<TOIE0);
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//Use prescaler 1024
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TCCR0B |= ((1<<CS12)|(1<<CS10));
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//Activate interrupts
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sei();
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}
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//Return time
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clock_time_t clock_time(){
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clock_time_t time;
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cli();
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time = clock_datetime;
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sei();
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return time;
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}
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