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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: $
*
* Copyright (C) 2007 by Jonathan Gordon
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "spi.h"
#include "tsc2100.h"
/* Read X, Y, Z1, Z2 touchscreen coordinates. */
void tsc2100_read_values(short *x, short* y, short *z1, short *z2)
{
int page = 0, address = 0;
unsigned short command = 0x8000|(page << 11)|(address << 5);
unsigned char out[] = {command >> 8, command & 0xff};
unsigned char in[8];
spi_block_transfer(SPI_target_TSC2100,
out, sizeof(out), in, sizeof(in));
*x = (in[0]<<8)|in[1];
*y = (in[2]<<8)|in[3];
*z1 = (in[4]<<8)|in[5];
*z2 = (in[6]<<8)|in[7];
}
short tsc2100_readreg(int page, int address)
{
unsigned short command = 0x8000|(page << 11)|(address << 5);
unsigned char out[] = {command >> 8, command & 0xff};
unsigned char in[2];
spi_block_transfer(SPI_target_TSC2100,
out, sizeof(out), in, sizeof(in));
return (in[0]<<8)|in[1];
}
void tsc2100_writereg(int page, int address, short value)
{
unsigned short command = (page << 11)|(address << 5);
unsigned char out[4] = {command >> 8, command & 0xff,
value >> 8, value & 0xff};
spi_block_transfer(SPI_target_TSC2100,
out, sizeof(out), NULL, 0);
}
void tsc2100_keyclick(void)
{
// 1100 0100 0001 0000
short val = 0xC410;
tsc2100_writereg(TSAC2_PAGE, TSAC2_ADDRESS, tsc2100_readreg(TSAC2_PAGE, TSAC2_ADDRESS)&0x8000);
}
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