rtc.c File Reference

Counters handler and IRQ routine. More...

#include <stdint.h>
#include <stdlib.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "rtc.h"

Include dependency graph for rtc.c:

Functions
	ISR (TIMER2_OVF_vect)
void	rtc_setup (void)
void	rtc_start (void)
void	rtc_stop (void)

Detailed Description

Counters handler and IRQ routine.

Function Documentation

ISR()

ISR

(

TIMER2_OVF_vect

)

IRQ wakes up on the timer oveflow and increment the global seconds.

rtc_setup()

void rtc_setup

(

void

)

setup timer/counter on 32Khz external clock.

enable interrupt on timer 2 overflow

rtc_start()

void rtc_start

(

void

)

setup prescaler to scale to 1 sec counter and start counter.

counter prescaler 1024

counter prescaler 128

rtc_stop()

void rtc_stop

(

void

)

stop the counter.