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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by Marcin Bukat
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "inttypes.h"
#include "system.h"
#include "timer.h"
void INT_TIMER1(void)
{
/* clear interrupt */
TMR1CON &= ~(1<<2);
if (pfn_timer != NULL)
{
pfn_timer();
}
}
bool timer_set(long cycles, bool start)
{
/* optionally unregister any previously registered timer user */
if (start)
{
if (pfn_unregister != NULL)
{
pfn_unregister();
pfn_unregister = NULL;
}
}
TMR1LR = cycles;
TMR1CON = (1<<7) | (1<<1); /* periodic, 1/1 */
/* unmask timer1 interrupt */
INTC_IMR |= IRQ_ARM_TIMER1;
/* enable timer1 interrupt */
INTC_IECR |= IRQ_ARM_TIMER1;
return true;
}
bool timer_start(void)
{
TMR1CON |= (1 << 8); /* timer1 enable */
return true;
}
void timer_stop(void)
{
TMR1CON &= ~(1 << 8); /* timer1 disable */
/* disable timer1 interrupt */
INTC_IMR &= ~IRQ_ARM_TIMER1;
INTC_IECR &= ~IRQ_ARM_TIMER1;
}
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