173d854e7f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23089 a1c6a512-1295-4272-9138-f99709370657
79 lines
2.5 KiB
C
79 lines
2.5 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 "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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IO_GIO_DIR0 &= ~(1<<15); /* output */
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IO_GIO_INV0 &= ~(1<<15); /* non-inverted */
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IO_GIO_FSEL0 &= ~(0x03<<12); /* normal pin */
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IO_GIO_BITSET0 = (1<<15);
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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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}
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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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short tsadc = tsc2100_readreg(TSADC_PAGE, TSADC_ADDRESS);
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short adscm = (tsadc&TSADC_ADSCM_MASK)>>TSADC_ADSCM_SHIFT;
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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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switch (adscm)
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{
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case 0x01:
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case 0x02:
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case 0x03:
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case 0x04:
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case 0x05:
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/* do a battery read - this will shutdown the adc till the next tick
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*/
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// tsc2100_set_mode(true, 0x0B);
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break;
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case 0x06:
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case 0x07:
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case 0x08:
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case 0x09:
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case 0x0B:
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tsc2100_set_mode(true, 0x01);
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break;
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}
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}
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