79 lines
1.2 KiB
C
79 lines
1.2 KiB
C
#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 "ads7843_lld.h"
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#include "xpt2046_lld.h"
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#define CONVERSIONS 3
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#define SET_CS(a) (TP_PORT->BSRR = 1 << (TP_CS + (a ? 0 : 16)))
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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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/*
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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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#endif
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