65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/***************************************************************************
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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) 2009 by Jonas Aaberg, 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 "tsc200x.h"
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#include "cpu.h"
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#include "i2c.h"
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#define TSC_SLAVE_ADDR 0x90
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#define TSC_REG_READ_X 0x80
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#define TSC_REG_READ_Y 0x90
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#ifdef COWON_D2
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#define TSCPRES_GPIO GPIOC
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#define TSCPRES_GPIO_DIR GPIOC_DIR
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#define TSCPRES_BIT (1<<26)
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#endif
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void tsc200x_init(void)
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{
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/* Configure GPIOC 26 (TSC pressed) for input */
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TSCPRES_GPIO_DIR &= ~TSCPRES_BIT;
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}
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bool tsc200x_is_pressed(void)
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{
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return !(TSCPRES_GPIO & TSCPRES_BIT);
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}
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bool tsc200x_read_coords(short* x, short* y)
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{
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int rc = 0;
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unsigned char x_val[2], y_val[2];
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rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_Y, y_val, 2);
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rc |= i2c_readmem(TSC_SLAVE_ADDR, TSC_REG_READ_X, x_val, 2);
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if (rc >= 0)
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{
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/* Keep the 10 most significant bits */
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*x = ((((short)x_val[0]) << 8) | x_val[1]) >> 6;
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*y = ((((short)y_val[0]) << 8) | y_val[1]) >> 6;
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return true;
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}
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return false;
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}
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