2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
47 lines
1.6 KiB
C
47 lines
1.6 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 Rob Purchase
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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 "timer.h"
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#include "thread.h"
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void tick_start(unsigned int interval_in_ms)
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{
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/* configure Timer T-Clock to 2Mhz (clock source 4 (Xin) divided by 6) */
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PCLKCFG4 = (1 << 31) | (4 << 28) | (5 << 16);
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/* disable Timer0 */
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TCFG0 &= ~1;
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/* set counter reference value based on 1Mhz tick */
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TREF0 = interval_in_ms * 1000;
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/* Timer0 = reset to 0, divide=2, IRQ enable, enable (continuous) */
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TCFG0 = (1<<8) | (0<<4) | (1<<3) | 1;
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/* Unmask timer IRQ */
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IEN |= TIMER0_IRQ_MASK;
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}
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/* NB: Since we are using a single timer IRQ, tick tasks are dispatched as
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part of the central timer IRQ processing in timer-tcc77x.c */
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