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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Karl Kurbjun
*
* 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 "cpu.h"
#include "adc.h"
#include "adc-target.h"
#include "kernel.h"
#include "tsc2100.h"
#include "button-target.h"
void adc_init(void)
{
/* Pin 15 appears to be the nPWD pin - make sure it is high otherwise the
* touchscreen does not work, audio has not been tested, but it is
* expected that is will also not work when low.
*/
IO_GIO_DIR0 &= ~(1<<15); /* output */
IO_GIO_INV0 &= ~(1<<15); /* non-inverted */
IO_GIO_FSEL0 &= ~(0x03<<12); /* normal pin */
IO_GIO_BITSET0 = (1<<15);
/* Initialize the touchscreen and the battery readout */
tsc2100_adc_init();
/* Enable the tsc2100 interrupt */
IO_INTC_EINT2 |= (1<<3); /* IRQ_GIO14 */
/* Read all registers to make sure they are clear */
tsc2100_read_data();
}
/* Touchscreen data available interupt */
void GIO14(void)
{
/* Interrupts work properly when cleared first */
IO_INTC_IRQ2 = (1<<3); /* IRQ_GIO14 == 35 */
/* Always read all registers in one go to clear any missed flags */
tsc2100_read_data();
/* Stop the scan, firmware will initiate another scan with a mode set */
tsc2100_set_mode(true, 0x00);
}
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