MePressureSensor.h

#ifndef MePressureSensor_H
#define MePressureSensor_H

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

#define BMP180_DEBUG 0

#define BMP180_I2CADDR 0x77

#define BMP180_ULTRALOWPOWER 0
#define BMP180_STANDARD      1
#define BMP180_HIGHRES       2
#define BMP180_ULTRAHIGHRES  3
#define BMP180_CAL_AC1           0xAA  
#define BMP180_CAL_AC2           0xAC  
#define BMP180_CAL_AC3           0xAE      
#define BMP180_CAL_AC4           0xB0  
#define BMP180_CAL_AC5           0xB2  
#define BMP180_CAL_AC6           0xB4  
#define BMP180_CAL_B1            0xB6  
#define BMP180_CAL_B2            0xB8  
#define BMP180_CAL_MB            0xBA  
#define BMP180_CAL_MC            0xBC  
#define BMP180_CAL_MD            0xBE  

#define BMP180_CONTROL           0xF4 
#define BMP180_TEMPDATA          0xF6
#define BMP180_PRESSUREDATA      0xF6
#define BMP180_READTEMPCMD          0x2E
#define BMP180_READPRESSURECMD            0x34


class MePressureSensor {
 public:
  MePressureSensor();
  boolean begin(uint8_t mode = BMP180_ULTRAHIGHRES); 
  float readTemperature(void);
  int32_t readPressure(void);
  int32_t readSealevelPressure(float altitude_meters = 0);
  float readAltitude(float sealevelPressure = 101325); 
  uint16_t readRawTemperature(void);
  uint32_t readRawPressure(void);
  
 private:
  int32_t computeB5(int32_t UT);
  uint8_t readUInt8(uint8_t addr);
  uint16_t readUInt16(uint8_t addr);
  void writeUInt8(uint8_t addr, uint8_t data);

  uint8_t oversampling;

  int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;
  uint16_t ac4, ac5, ac6;
};


#endif