Subversion Repositories igor

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