116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/***************************************************************************
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* Copyright (C) 11/2014 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License, *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <avr/interrupt.h>
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#include <avr/io.h>
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#include "event.h"
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#include "target.h"
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#include "timer.h"
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/* *********************************************************************** */
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static uint16_t timers[TIMER_COUNT];
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volatile static uint8_t timer_ticked;
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/* *********************************************************************** */
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ISR(TIMER_TIM_VECT)
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{
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/* 1ms interrupt */
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TIMER_TIM_RELOAD(TIMER_RELOAD);
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timer_ticked = 1;
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} /* TIM1_OVF_vect */
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uint8_t timer_check(uint8_t timer_needed)
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{
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if (timer_ticked)
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{
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uint8_t i;
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timer_ticked = 0;
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for (i = 0; i < TIMER_COUNT; i++)
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{
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if (timers[i] > 0)
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{
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timers[i]--;
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if (timers[i] == 0)
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{
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event_queue(EVENT_TYPE_TIMER_ELAPSED, i, 0);
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}
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else
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{
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timer_needed = 1;
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}
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}
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}
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/* stop timer */
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if (timer_needed == 0)
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{
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TIMER_TIM_DISABLE();
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}
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return 1;
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}
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return 0;
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} /* timer_check */
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uint8_t timer_get_sleep_mode(void)
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{
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if (TIMER_TIM_RUNNING())
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{
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return SLEEP_MODE_IDLE;
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}
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else
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{
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return SLEEP_MODE_PWR_DOWN;
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}
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} /* timer_get_sleep_mode */
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void timer_event_handler(struct event_entry *event)
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{
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if ((event->type == EVENT_TYPE_TIMER_SET) &&
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(event->num < TIMER_COUNT)
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)
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{
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timers[event->num] = event->value;
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/* start timer if needed */
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if (!TIMER_TIM_RUNNING())
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{
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TIMER_TIM_RELOAD(TIMER_RELOAD);
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TIMER_TIM_ENABLE();
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}
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}
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} /* timer_event_handler */
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void timer_init(void)
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{
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TIMER_TIM_INIT();
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TIMER_TIM_RELOAD(TIMER_RELOAD);
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TIMER_TIM_ENABLE();
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} /* timer_init */
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