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/* $Id$ */
/*
 * Copyright (c) 2011 Dimitri Sokolyuk <demon@dim13.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <avr/io.h>

#include <stdint.h>
#include <stdio.h>

#include "kernel.h"
#include "tasks.h"

#define FLASH(on, off)	do {	\
	PORTB |= _BV(PB0);	\
	sleep(0, (on));		\
	PORTB &= ~_BV(PB0);	\
	sleep(0, (off));	\
} while (0)

void
heartbeat(void *arg)
{
	DDRB |= _BV(PB0);
	PORTB &= ~_BV(PB0);

	/* 80 bpm */

	for (;;) {
		FLASH( 50000, 100000);
		FLASH(100000, 500000);
	}
}