Adafruit_MMA8451.h

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#ifndef _ADAFRUIT_MMA8451_H_
#define _ADAFRUIT_MMA8451_H_

#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <Adafruit_I2CDevice.h>

#define USE_SENSOR 
#ifdef USE_SENSOR
#include <Adafruit_Sensor.h>
#endif

/*=========================================================================
    I2C ADDRESS/BITS
    -----------------------------------------------------------------------*/
#define MMA8451_DEFAULT_ADDRESS                                                \
  (0x1D) 
/*=========================================================================*/

#define MMA8451_REG_OUT_X_MSB 0x01 
#define MMA8451_REG_SYSMOD 0x0B    
#define MMA8451_REG_WHOAMI 0x0D    
#define MMA8451_REG_XYZ_DATA_CFG                                               \
  0x0E 
#define MMA8451_REG_PL_STATUS                                                  \
  0x10 
#define MMA8451_REG_PL_CFG 0x11 
#define MMA8451_REG_CTRL_REG1 0x2A 
#define MMA8451_REG_CTRL_REG2 0x2B 
#define MMA8451_REG_CTRL_REG4 0x2D 
#define MMA8451_REG_CTRL_REG5 0x2E 

//* Different portrait and landscape settings */
#define MMA8451_PL_PUF 0
#define MMA8451_PL_PUB 1
#define MMA8451_PL_PDF 2
#define MMA8451_PL_PDB 3
#define MMA8451_PL_LRF 4
#define MMA8451_PL_LRB 5
#define MMA8451_PL_LLF 6
#define MMA8451_PL_LLB 7

typedef enum {
  MMA8451_RANGE_8_G = 0b10, // +/- 8g
  MMA8451_RANGE_4_G = 0b01, // +/- 4g
  MMA8451_RANGE_2_G = 0b00  // +/- 2g (default value)
} mma8451_range_t;

typedef enum {
  MMA8451_DATARATE_800_HZ = 0b000,  //  800Hz
  MMA8451_DATARATE_400_HZ = 0b001,  //  400Hz
  MMA8451_DATARATE_200_HZ = 0b010,  //  200Hz
  MMA8451_DATARATE_100_HZ = 0b011,  //  100Hz
  MMA8451_DATARATE_50_HZ = 0b100,   //   50Hz
  MMA8451_DATARATE_12_5_HZ = 0b101, // 12.5Hz
  MMA8451_DATARATE_6_25HZ = 0b110,  // 6.25Hz
  MMA8451_DATARATE_1_56_HZ = 0b111, // 1.56Hz

  MMA8451_DATARATE_MASK = 0b111
} mma8451_dataRate_t;

class Adafruit_MMA8451
#ifdef USE_SENSOR
    : public Adafruit_Sensor
#endif

{
public:
  Adafruit_MMA8451(int32_t id = -1);

  bool begin(uint8_t addr = MMA8451_DEFAULT_ADDRESS, TwoWire *theWire = &Wire);

  void read(); 

  void
  setRange(mma8451_range_t range); 
  mma8451_range_t
  getRange(void); 

  void setDataRate(mma8451_dataRate_t dataRate);
  mma8451_dataRate_t getDataRate(void); 

#ifdef USE_SENSOR

  bool getEvent(sensors_event_t *event);
  void getSensor(sensor_t *sensor);
#endif

  uint8_t getOrientation(void); 

  //* X, Y, and Z values */
  int16_t x, y, z;
  //* X, Y, and Z acceleration values */
  float x_g, y_g, z_g;

  void writeRegister8(uint8_t reg, uint8_t value);

protected:
  uint8_t readRegister8(uint8_t reg);

private:
  int32_t _sensorID;
  Adafruit_I2CDevice *i2c_dev = NULL; 
};

#endif