/elec/quadcopter

/*************************************************** 

  This is a library for the BMP085 Barometric Pressure & Temp Sensor

  Designed specifically to work with the Adafruit BMP085 Breakout 

  ----> https://www.adafruit.com/products/391

  These displays use I2C to communicate, 2 pins are required to  

  interface

  Adafruit invests time and resources providing this open source code, 

  please support Adafruit and open-source hardware by purchasing 

  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.  

  BSD license, all text above must be included in any redistribution

 ****************************************************/

#if (ARDUINO >= 100)

 #include "Arduino.h"

#else

 #include "WProgram.h"

#endif

#include "Wire.h"

#define BMP085_DEBUG 0

#define BMP085_I2CADDR 0x77

#define BMP085_ULTRALOWPOWER 0

#define BMP085_STANDARD      1

#define BMP085_HIGHRES       2

#define BMP085_ULTRAHIGHRES  3

#define BMP085_CAL_AC1           0xAA  // R   Calibration data (16 bits)

#define BMP085_CAL_AC2           0xAC  // R   Calibration data (16 bits)

#define BMP085_CAL_AC3           0xAE  // R   Calibration data (16 bits)    

#define BMP085_CAL_AC4           0xB0  // R   Calibration data (16 bits)

#define BMP085_CAL_AC5           0xB2  // R   Calibration data (16 bits)

#define BMP085_CAL_AC6           0xB4  // R   Calibration data (16 bits)

#define BMP085_CAL_B1            0xB6  // R   Calibration data (16 bits)

#define BMP085_CAL_B2            0xB8  // R   Calibration data (16 bits)

#define BMP085_CAL_MB            0xBA  // R   Calibration data (16 bits)

#define BMP085_CAL_MC            0xBC  // R   Calibration data (16 bits)

#define BMP085_CAL_MD            0xBE  // R   Calibration data (16 bits)

#define BMP085_CONTROL           0xF4 

#define BMP085_TEMPDATA          0xF6

#define BMP085_PRESSUREDATA      0xF6

#define BMP085_READTEMPCMD          0x2E

#define BMP085_READPRESSURECMD            0x34

class BMP085 {

 public:

  BMP085();

  boolean begin(uint8_t mode = BMP085_ULTRAHIGHRES);  // by default go highres

  float readTemperature(void);

  int32_t readPressure(void);

  float readAltitude(float sealevelPressure = 101325); // std atmosphere

  uint16_t readRawTemperature(void);

  uint32_t readRawPressure(void);

 private:

  uint8_t read8(uint8_t addr);

  uint16_t read16(uint8_t addr);

  void write8(uint8_t addr, uint8_t data);

  uint8_t oversampling;

  int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;

  uint16_t ac4, ac5, ac6;

};