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/***************************************************************************
* Copyright (C) 11/2014 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program 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; version 2 of the License, *
* *
* This program 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 this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <avr/interrupt.h>
#include <avr/io.h>
#include "event.h"
#include "target.h"
#include "timer.h"
/* *********************************************************************** */
static uint16_t timers[TIMER_COUNT];
volatile static uint8_t timer_ticked;
/* *********************************************************************** */
ISR(TIMER_TIM_VECT)
{
/* 1ms interrupt */
TIMER_TIM_RELOAD(TIMER_RELOAD);
timer_ticked = 1;
} /* TIM1_OVF_vect */
uint8_t timer_check(uint8_t timer_needed)
{
if (timer_ticked)
{
uint8_t i;
timer_ticked = 0;
for (i = 0; i < TIMER_COUNT; i++)
{
if (timers[i] > 0)
{
timers[i]--;
if (timers[i] == 0)
{
event_queue(EVENT_TYPE_TIMER_ELAPSED, i, 0);
}
else
{
timer_needed = 1;
}
}
}
/* stop timer */
if (timer_needed == 0)
{
TIMER_TIM_DISABLE();
}
return 1;
}
return 0;
} /* timer_check */
uint8_t timer_get_sleep_mode(void)
{
if (TIMER_TIM_RUNNING())
{
return SLEEP_MODE_IDLE;
}
else
{
return SLEEP_MODE_PWR_DOWN;
}
} /* timer_get_sleep_mode */
void timer_event_handler(struct event_entry *event)
{
if ((event->type == EVENT_TYPE_TIMER_SET) &&
(event->num < TIMER_COUNT)
)
{
timers[event->num] = event->value;
/* start timer if needed */
if (!TIMER_TIM_RUNNING())
{
TIMER_TIM_RELOAD(TIMER_RELOAD);
TIMER_TIM_ENABLE();
}
}
} /* timer_event_handler */
void timer_init(void)
{
TIMER_TIM_INIT();
TIMER_TIM_RELOAD(TIMER_RELOAD);
TIMER_TIM_ENABLE();
} /* timer_init */