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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Jonas Aaberg, Rob Purchase
*
* 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 "tsc200x.h"
#include "cpu.h"
#include "i2c.h"
#define TSC_SLAVE_ADDR 0x90
#define TSC_REG_READ_X 0x80
#define TSC_REG_READ_Y 0x90
#ifdef COWON_D2
#define TSCPRES_GPIO GPIOC
#define TSCPRES_GPIO_DIR GPIOC_DIR
#define TSCPRES_BIT (1<<26)
#endif
void tsc200x_init(void)
{
/* Configure GPIOC 26 (TSC pressed) for input */
TSCPRES_GPIO_DIR &= ~TSCPRES_BIT;
}
bool tsc200x_is_pressed(void)
{
return !(TSCPRES_GPIO & TSCPRES_BIT);
}
bool tsc200x_read_coords(short* x, short* y)
{
int rc = 0;
unsigned char x_val[2], y_val[2];
rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_Y, y_val, 2);
rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_X, x_val, 2);
if (rc >= 0)
{
/* Keep the 10 most significant bits */
*x = ((((short)x_val[0]) << 8) | x_val[1]) >> 6;
*y = ((((short)y_val[0]) << 8) | y_val[1]) >> 6;
return true;
}
return false;
}
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