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#include "global-conf.h"
#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
volatile clock_time_t clock_datetime = 0;
//Overflow interrupt
ISR(TIMER0_OVF_vect)
{
clock_datetime += 1;
}
//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;
}
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