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RLS_V0.9/R2Home_rls_softwareV0.9/Adafruit_BMP280.h

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+/*!
+ *  @file Adafruit_BMP280.h
+ *
+ *  This is a library for the Adafruit BMP280 Breakout.
+ *
+ *  Designed specifically to work with the Adafruit BMP280 Breakout.
+ *
+ *  Pick one up today in the adafruit shop!
+ *  ------> https://www.adafruit.com/product/2651
+ *
+ *  These sensors use I2C to communicate, 2 pins are required to interface.
+ *
+ *  Adafruit invests time and resources providing this open source code,
+ *  please support Adafruit andopen-source hardware by purchasing products
+ *  from Adafruit!
+ *
+ *  K.Townsend (Adafruit Industries)
+ *
+ *  BSD license, all text above must be included in any redistribution
+ */
+#ifndef __BMP280_H__
+#define __BMP280_H__
+
+#include "Adafruit_Sensor.h"
+#include "Arduino.h"
+#include <SPI.h>
+#include <Wire.h>
+
+/*!
+ *  I2C ADDRESS/BITS/SETTINGS
+ */
+#define BMP280_ADDRESS (0x77) /**< The default I2C address for the sensor. */
+#define BMP280_ADDRESS_ALT                                                     \
+  (0x76)                     /**< Alternative I2C address for the sensor. */
+#define BMP280_CHIPID (0x58) /**< Default chip ID. */
+
+//  Forward declarations of Wire and SPI for board/variant combinations that
+//  don't have a default 'Wire' or 'SPI'
+extern TwoWire Wire1; /**< Forward declaration of Wire object */
+extern SPIClass SPI; /**< Forward declaration of SPI object */
+
+/*!
+ * Registers available on the sensor.
+ */
+enum {
+  BMP280_REGISTER_DIG_T1 = 0x88,
+  BMP280_REGISTER_DIG_T2 = 0x8A,
+  BMP280_REGISTER_DIG_T3 = 0x8C,
+  BMP280_REGISTER_DIG_P1 = 0x8E,
+  BMP280_REGISTER_DIG_P2 = 0x90,
+  BMP280_REGISTER_DIG_P3 = 0x92,
+  BMP280_REGISTER_DIG_P4 = 0x94,
+  BMP280_REGISTER_DIG_P5 = 0x96,
+  BMP280_REGISTER_DIG_P6 = 0x98,
+  BMP280_REGISTER_DIG_P7 = 0x9A,
+  BMP280_REGISTER_DIG_P8 = 0x9C,
+  BMP280_REGISTER_DIG_P9 = 0x9E,
+  BMP280_REGISTER_CHIPID = 0xD0,
+  BMP280_REGISTER_VERSION = 0xD1,
+  BMP280_REGISTER_SOFTRESET = 0xE0,
+  BMP280_REGISTER_CAL26 = 0xE1, /**< R calibration = 0xE1-0xF0 */
+  BMP280_REGISTER_STATUS = 0xF3,
+  BMP280_REGISTER_CONTROL = 0xF4,
+  BMP280_REGISTER_CONFIG = 0xF5,
+  BMP280_REGISTER_PRESSUREDATA = 0xF7,
+  BMP280_REGISTER_TEMPDATA = 0xFA,
+};
+
+/*!
+ *  Struct to hold calibration data.
+ */
+typedef struct {
+  uint16_t dig_T1; /**< dig_T1 cal register. */
+  int16_t dig_T2;  /**<  dig_T2 cal register. */
+  int16_t dig_T3;  /**< dig_T3 cal register. */
+
+  uint16_t dig_P1; /**< dig_P1 cal register. */
+  int16_t dig_P2;  /**< dig_P2 cal register. */
+  int16_t dig_P3;  /**< dig_P3 cal register. */
+  int16_t dig_P4;  /**< dig_P4 cal register. */
+  int16_t dig_P5;  /**< dig_P5 cal register. */
+  int16_t dig_P6;  /**< dig_P6 cal register. */
+  int16_t dig_P7;  /**< dig_P7 cal register. */
+  int16_t dig_P8;  /**< dig_P8 cal register. */
+  int16_t dig_P9;  /**< dig_P9 cal register. */
+} bmp280_calib_data;
+
+class Adafruit_BMP280;
+
+/** Adafruit Unified Sensor interface for temperature component of BMP280 */
+class Adafruit_BMP280_Temp : public Adafruit_Sensor {
+public:
+  /** @brief Create an Adafruit_Sensor compatible object for the temp sensor
+      @param parent A pointer to the BMP280 class */
+  Adafruit_BMP280_Temp(Adafruit_BMP280 *parent) { _theBMP280 = parent; }
+  bool getEvent(sensors_event_t *);
+  void getSensor(sensor_t *);
+
+private:
+  int _sensorID = 280;
+  Adafruit_BMP280 *_theBMP280 = NULL;
+};
+
+/** Adafruit Unified Sensor interface for pressure component of BMP280 */
+class Adafruit_BMP280_Pressure : public Adafruit_Sensor {
+public:
+  /** @brief Create an Adafruit_Sensor compatible object for the pressure sensor
+      @param parent A pointer to the BMP280 class */
+  Adafruit_BMP280_Pressure(Adafruit_BMP280 *parent) { _theBMP280 = parent; }
+  bool getEvent(sensors_event_t *);
+  void getSensor(sensor_t *);
+
+private:
+  int _sensorID = 0;
+  Adafruit_BMP280 *_theBMP280 = NULL;
+};
+
+/**
+ * Driver for the Adafruit BMP280 barometric pressure sensor.
+ */
+class Adafruit_BMP280 {
+public:
+  /** Oversampling rate for the sensor. */
+  enum sensor_sampling {
+    /** No over-sampling. */
+    SAMPLING_NONE = 0x00,
+    /** 1x over-sampling. */
+    SAMPLING_X1 = 0x01,
+    /** 2x over-sampling. */
+    SAMPLING_X2 = 0x02,
+    /** 4x over-sampling. */
+    SAMPLING_X4 = 0x03,
+    /** 8x over-sampling. */
+    SAMPLING_X8 = 0x04,
+    /** 16x over-sampling. */
+    SAMPLING_X16 = 0x05
+  };
+
+  /** Operating mode for the sensor. */
+  enum sensor_mode {
+    /** Sleep mode. */
+    MODE_SLEEP = 0x00,
+    /** Forced mode. */
+    MODE_FORCED = 0x01,
+    /** Normal mode. */
+    MODE_NORMAL = 0x03,
+    /** Software reset. */
+    MODE_SOFT_RESET_CODE = 0xB6
+  };
+
+  /** Filtering level for sensor data. */
+  enum sensor_filter {
+    /** No filtering. */
+    FILTER_OFF = 0x00,
+    /** 2x filtering. */
+    FILTER_X2 = 0x01,
+    /** 4x filtering. */
+    FILTER_X4 = 0x02,
+    /** 8x filtering. */
+    FILTER_X8 = 0x03,
+    /** 16x filtering. */
+    FILTER_X16 = 0x04
+  };
+
+  /** Standby duration in ms */
+  enum standby_duration {
+    /** 1 ms standby. */
+    STANDBY_MS_1 = 0x00,
+    /** 62.5 ms standby. */
+    STANDBY_MS_63 = 0x01,
+    /** 125 ms standby. */
+    STANDBY_MS_125 = 0x02,
+    /** 250 ms standby. */
+    STANDBY_MS_250 = 0x03,
+    /** 500 ms standby. */
+    STANDBY_MS_500 = 0x04,
+    /** 1000 ms standby. */
+    STANDBY_MS_1000 = 0x05,
+    /** 2000 ms standby. */
+    STANDBY_MS_2000 = 0x06,
+    /** 4000 ms standby. */
+    STANDBY_MS_4000 = 0x07
+  };
+
+  Adafruit_BMP280(TwoWire *theWire = &Wire1);
+  Adafruit_BMP280(int8_t cspin, SPIClass *theSPI = &SPI);
+  Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
+  ~Adafruit_BMP280(void);
+
+  bool begin(uint8_t addr = BMP280_ADDRESS, uint8_t chipid = BMP280_CHIPID);
+  void reset(void);
+  uint8_t getStatus(void);
+
+  float readTemperature();
+  float readPressure(void);
+  float readAltitude(float seaLevelhPa = 1013.25);
+  float seaLevelForAltitude(float altitude, float atmospheric);
+  float waterBoilingPoint(float pressure);
+
+  Adafruit_Sensor *getTemperatureSensor(void);
+  Adafruit_Sensor *getPressureSensor(void);
+
+  // void takeForcedMeasurement();
+  void setSampling(sensor_mode mode = MODE_NORMAL,
+                   sensor_sampling tempSampling = SAMPLING_X16,
+                   sensor_sampling pressSampling = SAMPLING_X16,
+                   sensor_filter filter = FILTER_OFF,
+                   standby_duration duration = STANDBY_MS_1);
+
+private:
+  TwoWire *_wire; /**< Wire object */
+  SPIClass *_spi; /**< SPI object */
+
+  Adafruit_BMP280_Temp *temp_sensor = NULL;
+  Adafruit_BMP280_Pressure *pressure_sensor = NULL;
+
+  /** Encapsulates the config register */
+  struct config {
+    /** Inactive duration (standby time) in normal mode */
+    unsigned int t_sb : 3;
+    /** Filter settings */
+    unsigned int filter : 3;
+    /** Unused - don't set */
+    unsigned int none : 1;
+    /** Enables 3-wire SPI */
+    unsigned int spi3w_en : 1;
+    /** Used to retrieve the assembled config register's byte value. */
+    unsigned int get() { return (t_sb << 5) | (filter << 2) | spi3w_en; }
+  };
+
+  /** Encapsulates trhe ctrl_meas register */
+  struct ctrl_meas {
+    /** Temperature oversampling. */
+    unsigned int osrs_t : 3;
+    /** Pressure oversampling. */
+    unsigned int osrs_p : 3;
+    /** Device mode */
+    unsigned int mode : 2;
+    /** Used to retrieve the assembled ctrl_meas register's byte value. */
+    unsigned int get() { return (osrs_t << 5) | (osrs_p << 2) | mode; }
+  };
+
+  void readCoefficients(void);
+  uint8_t spixfer(uint8_t x);
+  void write8(byte reg, byte value);
+  uint8_t read8(byte reg);
+  uint16_t read16(byte reg);
+  uint32_t read24(byte reg);
+  int16_t readS16(byte reg);
+  uint16_t read16_LE(byte reg);
+  int16_t readS16_LE(byte reg);
+
+  uint8_t _i2caddr;
+
+  int32_t _sensorID;
+  int32_t t_fine;
+  int8_t _cs, _mosi, _miso, _sck;
+  bmp280_calib_data _bmp280_calib;
+  config _configReg;
+  ctrl_meas _measReg;
+};
+
+#endif