BMP180.h

/*
BMP180.h - Header file for the BMP180 Barometric Pressure Sensor Arduino Library.
Copyright (C) 2012 Love Electronics Ltd (loveelectronics.com)

This program is free software: you can redistribute it and/or modify
it under the terms of the version 3 GNU General Public License as
published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

 Datasheet for BMP180:
 http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP180-DS000-07.pdf

*/

#ifndef BMP180_h
#define BMP180_h

#include <inttypes.h>

#include "../../SmingCore/Wire.h"

#define BMP180_Address 0x77

#define ChipIdData 0x55
#define ControlInstruction_MeasureTemperature 0x2E
#define ControlInstruction_MeasurePressure 0x34

#define Reg_ChipId 0xD0
#define Reg_Control 0xF4
#define Reg_CalibrationStart 0xAA
#define Reg_CalibrationEnd 0xBE
#define Reg_AnalogConverterOutMSB 0xF6
#define Reg_SoftReset 0xE0
#define SoftResetInstruction 0xB6

#define ErrorCode_1 "Entered sample resolution was invalid. See datasheet for details."
#define ErrorCode_1_Num 1

#define BMP180_Mode_UltraLowPower       0
#define BMP180_Mode_Standard            1
#define BMP180_Mode_HighResolution      2
#define BMP180_Mode_UltraHighResolution 3

class BMP180
{
    public:
      BMP180();

      void Initialize(void);

      int GetUncompensatedTemperature();
      float CompensateTemperature(int uncompensatedTemperature);
      
      long GetUncompensatedPressure();
      long CompensatePressure(long uncompensatedPressure);
      
      float GetTemperature();
      long GetPressure();

      //float GetAltitude(float currentSeaLevelPressureInPa);
      
      void SoftReset();
      uint8_t SetResolution(uint8_t sampleResolution, bool oversample);

      void PrintCalibrationData();

      uint8_t EnsureConnected();
      uint8_t IsConnected;
      const char* GetErrorText(int errorCode);
    protected:
      void Write(int address, int byte);
      uint8_t* Read(int address, int length);
      void Read2(int address, int length, uint8_t buffer[]);
    private:
        uint8_t OversamplingSetting;
        bool Oversample;
        int16_t ConversionWaitTimeMs;
        int16_t LastTemperatureData;
        int16_t LastTemperatureTime;
        int16_t AcceptableTemperatureLatencyForPressure;
        
        int16_t Calibration_AC1;
        int16_t Calibration_AC2;
        int16_t Calibration_AC3;
        unsigned int Calibration_AC4;
        unsigned int Calibration_AC5;
        unsigned int Calibration_AC6;
        int16_t Calibration_B1;
        int16_t Calibration_B2;
        int16_t Calibration_MB;
        int16_t Calibration_MC;
        int16_t Calibration_MD;
        uint8_t buffer[64];
};
#endif