File content as of revision 4:b32cf4ef45c5:

#ifndef AR1021_H
#define AR1021_H

#include "TouchPanel.h"

/**
 * Microchip Touch Screen Controller (AR1021).
 *
 * Please note that this touch panel has an on-board storage for
 * calibration data. Once a successful calibration has been performed
 * it is not needed to do additional calibrations since the stored
 * calibration data will be used.
 */
class AR1021 : public TouchPanel {
public:


    /**
     * Constructor
     *
     * @param mosi SPI MOSI pin
     * @param miso SPI MISO pin
     * @param sck SPI SCK pin
     * @param cs chip-select pin
     * @param siq interrupt pin
     */
    AR1021(PinName mosi, PinName miso, PinName sck, PinName cs, PinName siq);


    bool init(uint16_t width, uint16_t height);
    bool read(touchCoordinate_t &coord);
    bool calibrateStart();
    bool getNextCalibratePoint(uint16_t* x, uint16_t* y);
    bool waitForCalibratePoint(bool* morePoints, uint32_t timeout);

private:


    SPI _spi;
    DigitalOut _cs;
    DigitalIn _siq;
    InterruptIn _siqIrq;
    bool _initialized;


    int32_t _x;
    int32_t _y;
    int32_t _pen;

    uint16_t _width;
    uint16_t _height;
    uint8_t _inset;

    int _calibPoint;


    int cmd(char cmd, char* data, int len, char* respBuf, int* respLen, bool setCsOff=true);
    int waitForCalibResponse(uint32_t timeout);
    void readTouchIrq();


};

#endif