2b57fc434c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23989 a1c6a512-1295-4272-9138-f99709370657
69 lines
2.4 KiB
C
69 lines
2.4 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) 2007 by Karl Kurbjun
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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 "cpu.h"
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#include "adc.h"
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#include "adc-target.h"
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#include "kernel.h"
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#include "tsc2100.h"
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#include "system-target.h"
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#include "button-target.h"
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void adc_init(void)
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{
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/* Pin 15 appears to be the nPWD pin - make sure it is high otherwise the
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* touchscreen does not work, audio has not been tested, but it is
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* expected that is will also not work when low.
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*/
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/* Setup touchscreen (tsc2100) pins:
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* 14 - input, touchscreen irq
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* 15 - output, touchscreen nPWD? */
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/* 14: input , non-inverted, irq, falling edge, no-chat, normal */
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dm320_set_io(14, true, false, true, false, false, 0x00);
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/* 15: output, non-inverted, no-irq, falling edge, no-chat, normal */
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dm320_set_io(15, false, false, false, false, false, 0x00);
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IO_GIO_BITSET0 = (1<<15); /* Turn on TSC2100 */
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/* Initialize the touchscreen and the battery readout */
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tsc2100_adc_init();
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/* Enable the tsc2100 interrupt */
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IO_INTC_EINT2 |= (1<<3); /* IRQ_GIO14 */
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/* Read all registers to make sure they are clear */
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tsc2100_read_data();
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}
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/* Touchscreen data available interupt */
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void GIO14(void)
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{
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/* Interrupts work properly when cleared first */
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IO_INTC_IRQ2 = (1<<3); /* IRQ_GIO14 == 35 */
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/* Always read all registers in one go to clear any missed flags */
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tsc2100_read_data();
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/* Stop the scan, firmware will initiate another scan with a mode set */
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tsc2100_set_mode(true, 0x00);
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}
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