first commit

libraries/Adafruit_BMP085_Unified/Adafruit_BMP085_U.h

@@ -0,0 +1,154 @@
+/*!
+ * @file Adafruit_BMP085_U.h
+ */
+
+#ifndef __BMP085_H__
+#define __BMP085_H__
+
+#if (ARDUINO >= 100)
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+
+#include <Adafruit_Sensor.h>
+
+#ifdef __AVR_ATtiny85__
+#include "TinyWireM.h"
+#define Wire TinyWireM
+#else
+#include <Wire.h>
+#endif
+
+/*!
+ * @brief BMP085 I2C address/bits
+ */
+#define BMP085_ADDRESS (0x77)
+
+/*!
+ * @brief BMP085 I2C registers
+ */
+enum {
+  BMP085_REGISTER_CAL_AC1 = 0xAA,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_AC2 = 0xAC,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_AC3 = 0xAE,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_AC4 = 0xB0,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_AC5 = 0xB2,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_AC6 = 0xB4,   //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_B1 = 0xB6,    //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_B2 = 0xB8,    //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_MB = 0xBA,    //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_MC = 0xBC,    //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CAL_MD = 0xBE,    //!< R   Calibration data (16 bits)
+  BMP085_REGISTER_CHIPID = 0xD0,    //!< Register that contains the chip ID
+  BMP085_REGISTER_VERSION = 0xD1,   //!< Register that contains the chip version
+  BMP085_REGISTER_SOFTRESET = 0xE0, //!< Register for doing a soft reset
+  BMP085_REGISTER_CONTROL = 0xF4,   //!< Control register
+  BMP085_REGISTER_TEMPDATA = 0xF6,  //!< Temperature data register
+  BMP085_REGISTER_PRESSUREDATA = 0xF6, //!< Pressure data register
+  BMP085_REGISTER_READTEMPCMD =
+      0x2E, //!< Read temperature control register value
+  BMP085_REGISTER_READPRESSURECMD =
+      0x34 //!< Read pressure control register value
+};
+
+/*!
+ * @brief BMP085 mode settings
+ */
+typedef enum {
+  BMP085_MODE_ULTRALOWPOWER = 0,
+  BMP085_MODE_STANDARD = 1,
+  BMP085_MODE_HIGHRES = 2,
+  BMP085_MODE_ULTRAHIGHRES = 3
+} bmp085_mode_t;
+/*=========================================================================*/
+
+/*!
+ * @brief Calibration data
+ */
+typedef struct {
+  int16_t ac1;  //!< R calibration coefficient (16-bits)
+  int16_t ac2;  //!< R calibration coefficient (16-bits)
+  int16_t ac3;  //!< R calibration coefficient (16-bits)
+  uint16_t ac4; //!< R calibration coefficient (16-bits)
+  uint16_t ac5; //!< R calibration coefficient (16-bits)
+  uint16_t ac6; //!< R calibration coefficient (16-bits)
+  int16_t b1;   //!< R calibration coefficient (16-bits)
+  int16_t b2;   //!< R calibration coefficient (16-bits)
+  int16_t mb;   //!< R calibration coefficient (16-bits)
+  int16_t mc;   //!< R calibration coefficient (16-bits)
+  int16_t md;   //!< R calibration coefficient (16-bits)
+} bmp085_calib_data;
+
+/*!
+ * @brief Class that stores state and functions for interacting with BMP183
+ */
+class Adafruit_BMP085_Unified : public Adafruit_Sensor {
+public:
+  Adafruit_BMP085_Unified(
+      int32_t sensorID = -1); //!< @param sensorID ID of the BMP085 sensor
+
+  /*!
+   * @brief Starts I2C connection
+   * @param mode Mode to set, ultra high-res by default
+   * @return Returns true if successful
+   */
+  bool begin(bmp085_mode_t mode = BMP085_MODE_ULTRAHIGHRES);
+  /*!
+   * @brief Gets the temperature over I2C from the BMP085
+   * @param temp Temperature
+   * @return Returns the temperature
+   */
+  void getTemperature(float *temp);
+  /*!
+   * @brief Gets the pressure over I2C from the BMP085
+   * @param pressure Pressure
+   * @return Returns the pressure
+   */
+  void getPressure(float *pressure);
+  /*!
+   * @brief Calculates absolute pressure
+   * @param seaLevel Pressure at sea level
+   * @param atmospheric measured pressure
+   * @return Absolute altitude
+   */
+  float pressureToAltitude(float seaLevel, float atmospheric);
+  /*!
+   * @brief Calculates pressure at sea level
+   * @param altitude Altitude
+   * @param atmospheric measured pressure
+   * @return Pressure at sea level
+   */
+  float seaLevelForAltitude(float altitude, float atmospheric);
+  // Note that the next two functions are just for compatibility with old
+  // code that passed the temperature as a third parameter.  A newer
+  // calculation is used which does not need temperature.
+  /*!
+   * @brief Calculates absolute pressure
+   * @param seaLevel Pressure at sea level
+   * @param atmospheric Measured pressure
+   * @param temp Temperature
+   * @return Absolute altitude
+   */
+  float pressureToAltitude(float seaLevel, float atmospheric, float temp);
+  /*!
+   * @brief Calculates pressure at sea level
+   * @param altitude Altitude
+   * @param atmospheric measured pressure
+   * @param temp Temperature
+   * @return Pressure at sea level
+   */
+  float seaLevelForAltitude(float altitude, float atmospheric, float temp);
+  /*!
+   * @brief Used to read the sensor
+   * @return Returns an event
+   */
+  bool getEvent(sensors_event_t *);
+  void getSensor(sensor_t *);
+
+private:
+  int32_t computeB5(int32_t ut);
+  int32_t _sensorID;
+};
+
+#endif