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#ifndef TOUCHPAD_H
#define TOUCHPAD_H
#include "ch.h"
#include "hal.h"
#include "glcd.h"
#define CONVERSIONS 3
#define SET_CS(a) (TP_PORT->BSRR = 1 << (TP_CS + (a ? 0 : 16)))
struct cal {
float xm;
float ym;
float xn;
float yn;
};
/*
* 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: calibration routine
*
* param: none
*
* return: none
*/
void tpCalibrate(void);
#endif
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