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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Jonathan Gordon
*
* 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 "config.h"
#include "cpu.h"
#include "system.h"
#include "spi.h"
#include "tsc2100.h"
/* adc_data contains the last readings from the tsc2100 */
static short adc_data[10];
static short adc_status;
void tsc2100_read_data(void)
{
int page = 0, address = 0;
unsigned int i;
unsigned short command = 0x8000|(page << 11)|(address << 5);
unsigned char out[] = {command >> 8, command & 0xff};
unsigned char *p_adc_data=(unsigned char *)&adc_data;
adc_status|=tsc2100_readreg(TSSTAT_PAGE, TSSTAT_ADDRESS);
spi_block_transfer(SPI_target_TSC2100,
out, sizeof(out), (char *)adc_data, sizeof(adc_data));
for(i=0; i<sizeof(adc_data); i+=2)
adc_data[i>>1]=(short)(p_adc_data[i]<<8|p_adc_data[i+1]);
}
/* Read X, Y, Z1, Z2 touchscreen coordinates. */
bool tsc2100_read_touch(short *x, short* y, short *z1, short *z2)
{
if( adc_status&(3<<9) ) {
*x = adc_data[0];
*y = adc_data[1];
*z1 = adc_data[2];
*z2 = adc_data[3];
adc_status&=~(3<<9);
return true;
} else {
return false;
}
}
bool tsc2100_read_volt(short *bat1, short *bat2, short *aux)
{
if( adc_status&(7<<4) ) {
*bat1 = adc_data[5];
*bat2 = adc_data[6];
*aux = adc_data[7];
adc_status&=~(7<<4);
return true;
} else {
return false;
}
}
void tsc2100_set_mode(bool poweron, unsigned char scan_mode)
{
short tsadc=(scan_mode<<TSADC_ADSCM_SHIFT)| /* mode */
(0x3<<TSADC_RESOL_SHIFT)| /* 12 bit resolution */
(0x2<<TSADC_ADCR_SHIFT )| /* 2 MHz internal clock */
(0x2<<TSADC_PVSTC_SHIFT);
if(!poweron)
{
tsadc|=TSADC_ADST;
}
if(scan_mode<6)
tsadc|=TSADC_PSTCM;
tsc2100_writereg(TSADC_PAGE, TSADC_ADDRESS, tsadc);
}
void tsc2100_adc_init(void)
{
/* Set the TSC2100 to read touchscreen */
tsc2100_set_mode(true, 0x02);
tsc2100_writereg(TSSTAT_PAGE, TSSTAT_ADDRESS,
(0x1<<TSSTAT_PINTDAV_SHIFT) /* Data available only */
);
/* An additional 2 mA can be saved here by powering down vref between
* conversions, but it adds a click to the audio on the M:Robe 500
*/
tsc2100_writereg(TSREF_PAGE, TSREF_ADDRESS,
TSREF_VREFM|TSREF_IREFV);
}
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);
}
#ifdef HAVE_HARDWARE_BEEP
void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude)
{
tsc2100_keyclick();
}
#endif
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