46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Tomasz Malesinski
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "system.h"
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#include "kernel.h"
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void timer_handler(void)
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{
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/* Run through the list of tick tasks */
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call_tick_tasks();
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TIMER0.clr = 0;
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}
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void tick_start(unsigned int interval_in_ms)
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{
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TIMER0.ctrl &= ~0x80; /* Disable the counter */
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TIMER0.ctrl |= 0x40; /* Reload after counting down to zero */
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TIMER0.load = 3000000 * interval_in_ms / 1000;
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TIMER0.ctrl &= ~0xc; /* No prescaler */
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TIMER0.clr = 1; /* Clear the interrupt request */
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irq_set_int_handler(IRQ_TIMER0, timer_handler);
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irq_enable_int(IRQ_TIMER0);
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TIMER0.ctrl |= 0x80; /* Enable the counter */
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}
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