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