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/*
ChibiOS/RT - Copyright (C) 2012
Joel Bodenmann aka Tectu <joel@unormal.org>
This file is part of ChibiOS-LCD-Driver.
ChibiOS-LCD-Driver 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 3 of the License, or
(at your option) any later version.
ChibiOS-LCD-Driver is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TOUCHPAD_H
#define TOUCHPAD_H
#include "ch.h"
#include "hal.h"
#include "glcd.h"
#include "glcdconf.h"
#include "ads7843_lld.h"
#include "xpt2046_lld.h"
#define CONVERSIONS 3
#define TP_CS_HIGH palSetPad(TP_CS_PORT, TP_CS)
#define TP_CS_LOW palClearPad(TP_CS_PORT, TP_CS)
struct cal {
float xm;
float ym;
float xn;
float yn;
};
#ifdef __cplusplus
extern "C" {
#endif
/*
* Description: initializes touchpad (SPI)
*
* param: SPI driver
*
* return: none
*/
void tpInit(SPIDriver *spip);
/*
* Description: reads out PEN_IRQ from touchpad controller
*
* param: none
*
* return: 1 = touchpad pressed / 0 = touchpad not pressed
*/
uint8_t tpIRQ(void);
/*
* Description: reads-out X coordinate, calibrated
*
* param: none
*
* return: X coordinate, relative to screen zero-point
*/
uint16_t tpReadX(void);
/*
* Description: reads-out Y coordinate, calibrated
*
* param: none
*
* return: Y coordinate, relative to screen zero-point
*/
uint16_t tpReadY(void);
/*
* Description: reads-out Z value / pressure
* only available when controller supports, returns
* zero otherwise.
*
* param: none
*
* return: pressure on the touchpad
*/
uint16_t tpReadZ(void);
/*
* Description: calibration routine
*
* param: none
*
* return: none
*/
void tpCalibrate(void);
#ifdef __cplusplus
}
#endif
#endif
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