158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
/***************************************************************************
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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) 2007 by Jonathan Gordon
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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 "config.h"
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#include "cpu.h"
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#include "system.h"
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#include "spi.h"
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#include "tsc2100.h"
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/* adc_data contains the last readings from the tsc2100 */
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static short adc_data[10];
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static short adc_status;
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static long adc_last_read=0;
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static long adc_last_touch_read=0;
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static long adc_last_volt_read=0;
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void tsc2100_read_data(void)
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{
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int page = 0, address = 0;
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unsigned int i;
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unsigned short command = 0x8000|(page << 11)|(address << 5);
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unsigned char out[] = {command >> 8, command & 0xff};
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unsigned char *p_adc_data=(unsigned char *)&adc_data;
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adc_status|=tsc2100_readreg(TSSTAT_PAGE, TSSTAT_ADDRESS);
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adc_last_read=current_tick;
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spi_block_transfer(SPI_target_TSC2100,
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out, sizeof(out), (char *)adc_data, sizeof(adc_data));
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for(i=0; i<sizeof(adc_data); i+=2)
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adc_data[i>>1]=(short)(p_adc_data[i]<<8|p_adc_data[i+1]);
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}
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/* Read X, Y, Z1, Z2 touchscreen coordinates. */
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bool tsc2100_read_touch(short *x, short* y, short *z1, short *z2)
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{
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/* Note: This could cause problems if the current tick is not reset in ~1.3
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* years. Noting this in the event that a suspend/resume function
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* is added.
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*/
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if( (adc_status&(3<<9)) && (adc_last_read - adc_last_touch_read>=0) ) {
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*x = adc_data[0];
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*y = adc_data[1];
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*z1 = adc_data[2];
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*z2 = adc_data[3];
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adc_status&=~(3<<9);
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adc_last_touch_read=current_tick;
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return true;
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} else {
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return false;
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}
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}
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bool tsc2100_read_volt(short *bat1, short *bat2, short *aux)
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{
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if( (adc_status&(7<<4)) && TIME_BEFORE(adc_last_volt_read, adc_last_read)) {
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*bat1 = adc_data[5];
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*bat2 = adc_data[6];
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*aux = adc_data[7];
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adc_status&=~(7<<4);
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adc_last_volt_read=current_tick;
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return true;
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} else {
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return false;
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}
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}
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void tsc2100_set_mode(bool poweron, unsigned char scan_mode)
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{
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short tsadc=(scan_mode<<TSADC_ADSCM_SHIFT)| /* mode */
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(0x3<<TSADC_RESOL_SHIFT)| /* 12 bit resolution */
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(0x2<<TSADC_ADCR_SHIFT )| /* 2 MHz internal clock */
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(0x2<<TSADC_PVSTC_SHIFT);
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if(!poweron)
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{
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tsadc|=TSADC_ADST;
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}
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if(scan_mode<6)
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tsadc|=TSADC_PSTCM;
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tsc2100_writereg(TSADC_PAGE, TSADC_ADDRESS, tsadc);
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}
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void tsc2100_adc_init(void)
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{
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/* Set the TSC2100 to read touchscreen */
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tsc2100_set_mode(true, 0x01);
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tsc2100_writereg(TSSTAT_PAGE, TSSTAT_ADDRESS,
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(0x1<<TSSTAT_PINTDAV_SHIFT) /* Data available only */
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);
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/* An additional 2 mA can be saved here by powering down vref between
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* conversions, but it adds a click to the audio on the M:Robe 500
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*/
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tsc2100_writereg(TSREF_PAGE, TSREF_ADDRESS,
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TSREF_VREFM|TSREF_IREFV);
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}
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short tsc2100_readreg(int page, int address)
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{
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unsigned short command = 0x8000|(page << 11)|(address << 5);
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unsigned char out[] = {command >> 8, command & 0xff};
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unsigned char in[2];
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spi_block_transfer(SPI_target_TSC2100, out, sizeof(out), in, sizeof(in));
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return (in[0]<<8)|in[1];
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}
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void tsc2100_writereg(int page, int address, short value)
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{
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unsigned short command = (page << 11)|(address << 5);
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unsigned char out[4] = {command >> 8, command & 0xff,
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value >> 8, value & 0xff};
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spi_block_transfer(SPI_target_TSC2100, out, sizeof(out), NULL, 0);
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}
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void tsc2100_keyclick(void)
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{
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// 1100 0100 0001 0000
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//short val = 0xC410;
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tsc2100_writereg(TSAC2_PAGE, TSAC2_ADDRESS, tsc2100_readreg(TSAC2_PAGE, TSAC2_ADDRESS)&0x8000);
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}
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#ifdef HAVE_HARDWARE_BEEP
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void pcmbuf_beep(unsigned int frequency, size_t duration, int amplitude)
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{
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tsc2100_keyclick();
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}
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#endif
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