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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* 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 "system.h"
#include "kernel.h"
#include "jz4740.h"
void tick_start(unsigned int interval_in_ms)
{
unsigned int latch;
__cpm_start_tcu();
__tcu_stop_counter(0);
__tcu_disable_pwm_output(0);
__tcu_mask_half_match_irq(0);
__tcu_unmask_full_match_irq(0);
__tcu_select_extalclk(0);
__tcu_select_clk_div4(0);
/* 12Mhz / 4 = 3Mhz */
latch = interval_in_ms*1000 * 3;
REG_TCU_TCNT(0) = 0;
REG_TCU_TDFR(0) = latch;
REG_TCU_TDHR(0) = latch;
__tcu_clear_full_match_flag(0);
__tcu_start_counter(0);
system_enable_irq(IRQ_TCU0);
}
/* Interrupt handler */
void TCU0(void)
{
__tcu_clear_full_match_flag(0);
/* Run through the list of tick tasks */
call_tick_tasks();
}
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