Adafruit_MPL3115A2.h

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#ifndef __MPL3115A2__
#define __MPL3115A2__

#include "Arduino.h"
#include <Adafruit_I2CDevice.h>

#define MPL3115A2_ADDRESS (0x60) 


enum {
  MPL3115A2_REGISTER_STATUS = (0x00),

  MPL3115A2_REGISTER_PRESSURE_MSB = (0x01),
  MPL3115A2_REGISTER_PRESSURE_CSB = (0x02),
  MPL3115A2_REGISTER_PRESSURE_LSB = (0x03),

  MPL3115A2_REGISTER_TEMP_MSB = (0x04),
  MPL3115A2_REGISTER_TEMP_LSB = (0x05),

  MPL3115A2_REGISTER_DR_STATUS = (0x06),

  MPL3115A2_OUT_P_DELTA_MSB = (0x07),
  MPL3115A2_OUT_P_DELTA_CSB = (0x08),
  MPL3115A2_OUT_P_DELTA_LSB = (0x09),

  MPL3115A2_OUT_T_DELTA_MSB = (0x0A),
  MPL3115A2_OUT_T_DELTA_LSB = (0x0B),

  MPL3115A2_WHOAMI = (0x0C),

  MPL3115A2_BAR_IN_MSB = (0x14),
  MPL3115A2_BAR_IN_LSB = (0x15),

  MPL3115A2_OFF_H = (0x2D),
};

enum {
  MPL3115A2_REGISTER_STATUS_TDR = 0x02,
  MPL3115A2_REGISTER_STATUS_PDR = 0x04,
  MPL3115A2_REGISTER_STATUS_PTDR = 0x08,
};

enum {
  MPL3115A2_PT_DATA_CFG = 0x13,
  MPL3115A2_PT_DATA_CFG_TDEFE = 0x01,
  MPL3115A2_PT_DATA_CFG_PDEFE = 0x02,
  MPL3115A2_PT_DATA_CFG_DREM = 0x04,
};

enum {

  MPL3115A2_CTRL_REG1 = (0x26),
  MPL3115A2_CTRL_REG2 = (0x27),
  MPL3115A2_CTRL_REG3 = (0x28),
  MPL3115A2_CTRL_REG4 = (0x29),
  MPL3115A2_CTRL_REG5 = (0x2A),
};

enum {
  MPL3115A2_CTRL_REG1_SBYB = 0x01,
  MPL3115A2_CTRL_REG1_OST = 0x02,
  MPL3115A2_CTRL_REG1_RST = 0x04,
  MPL3115A2_CTRL_REG1_RAW = 0x40,
  MPL3115A2_CTRL_REG1_ALT = 0x80,
  MPL3115A2_CTRL_REG1_BAR = 0x00,
};

enum {
  MPL3115A2_CTRL_REG1_OS1 = 0x00,
  MPL3115A2_CTRL_REG1_OS2 = 0x08,
  MPL3115A2_CTRL_REG1_OS4 = 0x10,
  MPL3115A2_CTRL_REG1_OS8 = 0x18,
  MPL3115A2_CTRL_REG1_OS16 = 0x20,
  MPL3115A2_CTRL_REG1_OS32 = 0x28,
  MPL3115A2_CTRL_REG1_OS64 = 0x30,
  MPL3115A2_CTRL_REG1_OS128 = 0x38,
};

typedef enum {
  MPL3115A2_BAROMETER = 0,
  MPL3115A2_ALTIMETER,
} mpl3115a2_mode_t;

typedef enum {
  MPL3115A2_PRESSURE,
  MPL3115A2_ALTITUDE,
  MPL3115A2_TEMPERATURE,
} mpl3115a2_meas_t;

#define MPL3115A2_REGISTER_STARTCONVERSION (0x12) 


class Adafruit_MPL3115A2 {
public:
  Adafruit_MPL3115A2();
  boolean begin(TwoWire *twoWire = &Wire);
  float getPressure(void);
  float getAltitude(void);
  int8_t getAltitudeOffset(void);
  void setAltitudeOffset(int8_t offset);
  float getTemperature(void);
  void setSeaPressure(float SLP);

  void setMode(mpl3115a2_mode_t mode = MPL3115A2_BAROMETER);
  void startOneShot(void);
  bool conversionComplete(void);
  float getLastConversionResults(mpl3115a2_meas_t value = MPL3115A2_PRESSURE);

  void write8(uint8_t a, uint8_t d);

private:
  Adafruit_I2CDevice *i2c_dev = NULL; 
  uint8_t read8(uint8_t a);
  mpl3115a2_mode_t currentMode;

  typedef union {
    struct {
      uint8_t SBYB : 1;
      uint8_t OST : 1;
      uint8_t RST : 1;
      uint8_t OS : 3;
      uint8_t RAW : 1;
      uint8_t ALT : 1;
    } bit;
    uint8_t reg;
  } ctrl_reg1;
  ctrl_reg1 _ctrl_reg1;
};

#endif