Adafruit_FT6206.h

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#ifndef ADAFRUIT_FT6206_LIBRARY
#define ADAFRUIT_FT6206_LIBRARY

#include <Adafruit_I2CDevice.h>

#include "Arduino.h"

#define FT62XX_DEFAULT_ADDR 0x38   
#define FT62XX_G_FT5201ID 0xA8     
#define FT62XX_REG_NUMTOUCHES 0x02 

#define FT62XX_NUM_X 0x33 
#define FT62XX_NUM_Y 0x34 

#define FT62XX_REG_MODE 0x00        
#define FT62XX_REG_CALIBRATE 0x02   
#define FT62XX_REG_WORKMODE 0x00    
#define FT62XX_REG_FACTORYMODE 0x40 
#define FT62XX_REG_THRESHHOLD 0x80  
#define FT62XX_REG_POINTRATE 0x88   
#define FT62XX_REG_FIRMVERS 0xA6    
#define FT62XX_REG_CHIPID 0xA3      
#define FT62XX_REG_VENDID 0xA8      

#define FT62XX_VENDID 0x11  
#define FT6206_CHIPID 0x06  
#define FT6236_CHIPID 0x36  
#define FT6236U_CHIPID 0x64 
#define FT6336U_CHIPID 0x64 

// calibrated for Adafruit 2.8" ctp screen
#define FT62XX_DEFAULT_THRESHOLD 128 

/**************************************************************************/
/**************************************************************************/
class TS_Point {
 public:
  TS_Point(void);
  TS_Point(int16_t x, int16_t y, int16_t z);

  bool operator==(TS_Point);
  bool operator!=(TS_Point);

  int16_t x; 
  int16_t y; 
  int16_t z; 
};

/**************************************************************************/
/**************************************************************************/
class Adafruit_FT6206 {
 public:
  Adafruit_FT6206(void);
  bool begin(uint8_t thresh = FT62XX_DEFAULT_THRESHOLD,
             TwoWire* theWire = &Wire, uint8_t i2c_addr = FT62XX_DEFAULT_ADDR);
  uint8_t touched(void);
  TS_Point getPoint(uint8_t n = 0);

  // void autoCalibrate(void);

 private:
  Adafruit_I2CDevice* i2c_dev = NULL; 
  void writeRegister8(uint8_t reg, uint8_t val);
  uint8_t readRegister8(uint8_t reg);

  void readData(void);
  uint8_t touches;
  uint16_t touchX[2], touchY[2], touchID[2];
};

#endif // ADAFRUIT_FT6206_LIBRARY