src/scheduling/realtime_timer.h

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/*
 * realtime_timer.h
 *
 * Copyright 2011 Pieter Agten
 *
 * This file is part of Yarf.
 *
 * Yarf is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Yarf is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Yarf.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef REALTIME_TIMER_H_
#define REALTIME_TIMER_H_

#include <stdint.h>

#define RTTIMER_TICKS_PER_MIN (F_CPU/8L*60L)

#define RTTIMER_SUCCESS      0

#define RTTIMER_BUSY        -1

#define RTTIMER_NOT_RUNNING -2

typedef struct {
  void (*f)(void); 
  uint16_t ticks_remaining; 
} realtime_task_t;


void rttimer_init(void);

int rttimer_schedule_ticks(realtime_task_t *t, uint16_t ticks);

int rttimer_cancel(void);


#endif //REALTIME_TIMER_H_