c983e3b1d2
* LCD rework * Dynamic DMA enabling * PCM cleanup * USB: replace printf() with logf() * System: get rid of in_interrupt_mode() * Backlight: add support for software PWM git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19495 a1c6a512-1295-4272-9138-f99709370657
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/***************************************************************************
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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) 2008 by Maurus Cuelenaere
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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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#include "jz4740.h"
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void tick_start(unsigned int interval_in_ms)
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{
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unsigned int latch;
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__cpm_start_tcu();
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__tcu_stop_counter(0);
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__tcu_disable_pwm_output(0);
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__tcu_mask_half_match_irq(0);
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__tcu_unmask_full_match_irq(0);
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__tcu_select_extalclk(0);
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__tcu_select_clk_div4(0);
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latch = (JZ_EXTAL / 4 + (interval_in_ms>>1)) / interval_in_ms;
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REG_TCU_TCNT(0) = 0;
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REG_TCU_TDFR(0) = latch;
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REG_TCU_TDHR(0) = latch;
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__tcu_clear_full_match_flag(0);
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__tcu_start_counter(0);
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system_enable_irq(IRQ_TCU0);
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}
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/* Interrupt handler */
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void TCU0(void)
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{
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__tcu_clear_full_match_flag(0);
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/* Run through the list of tick tasks */
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call_tick_tasks();
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}
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