112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/*!
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* @file Adafruit_BMP183_U.h
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*
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* Designed specifically to work with the Adafruit BMP183 Breakout
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* ----> http://www.adafruit.com/products/1900
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*
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* These sensors use SPI to communicate, 4 pins are required
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* to interface.
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*
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* Adafruit invests time and resources providing this open source code,
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* please support Adafruit and open-source hardware by purchasing
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* products from Adafruit!
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*
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* Written by Kevin Townsend "KTOWN" for Adafruit Industries.
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*
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* BSD license, all text here must be included in any redistribution.
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*
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*/
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#ifndef __BMP183_H__
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#define __BMP183_H__
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#include "Arduino.h"
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#include <Adafruit_Sensor.h>
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#include <SPI.h>
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/** Registers **/
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enum {
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BMP183_REGISTER_CAL_AC1 = 0xAA, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_AC2 = 0xAC, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_AC3 = 0xAE, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_AC4 = 0xB0, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_AC5 = 0xB2, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_AC6 = 0xB4, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_B1 = 0xB6, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_B2 = 0xB8, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_MB = 0xBA, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_MC = 0xBC, // R Calibration data (16 bits)
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BMP183_REGISTER_CAL_MD = 0xBE, // R Calibration data (16 bits)
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BMP183_REGISTER_CHIPID = 0xD0,
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BMP183_REGISTER_VERSION = 0xD1,
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BMP183_REGISTER_SOFTRESET = 0xE0,
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BMP183_REGISTER_CONTROL = 0xF4,
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BMP183_REGISTER_TEMPDATA = 0xF6,
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BMP183_REGISTER_PRESSUREDATA = 0xF6,
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BMP183_REGISTER_READTEMPCMD = 0x2E,
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BMP183_REGISTER_READPRESSURECMD = 0x34
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};
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/** Mode Settings **/
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typedef enum {
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BMP183_MODE_ULTRALOWPOWER = 0,
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BMP183_MODE_STANDARD = 1,
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BMP183_MODE_HIGHRES = 2,
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BMP183_MODE_ULTRAHIGHRES = 3
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} bmp183_mode_t;
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/** Calibration Data **/
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typedef struct {
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int16_t ac1; /**< Calibration coefficient (ac1) **/
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int16_t ac2; /**< Calibration coefficient (ac2) **/
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int16_t ac3; /**< Calibration coefficient (ac3) **/
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uint16_t ac4; /**< Calibration coefficient (ac4) **/
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uint16_t ac5; /**< Calibration coefficient (ac5) **/
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uint16_t ac6; /**< Calibration coefficient (ac6) **/
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int16_t b1; /**< Calibration coefficient (b1) **/
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int16_t b2; /**< Calibration coefficient (b2) **/
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int16_t mb; /**< Calibration coefficient (mb) **/
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int16_t mc; /**< Calibration coefficient (mc) **/
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int16_t md; /**< Calibration coefficient (md) **/
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} bmp183_calib_data;
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/*!
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* @brief Class that stores state and functions for interacting with
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* BMP183
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*/
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class Adafruit_BMP183_Unified : public Adafruit_Sensor {
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public:
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Adafruit_BMP183_Unified(int8_t SPICLK, int8_t SPIMISO, int8_t SPIMOSI,
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int8_t SPICS, int32_t sensorID = -1);
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Adafruit_BMP183_Unified(int8_t SPICS, int32_t sensorID = -1,
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SPIClass *theSPI = &SPI);
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bool begin(bmp183_mode_t mode = BMP183_MODE_ULTRAHIGHRES);
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float getTemperature();
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float getPressure();
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float pressureToAltitude(float seaLevel, float atmospheric, float temp);
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float seaLevelForAltitude(float altitude, float atmospheric, float temp);
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bool getEvent(sensors_event_t *);
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void getSensor(sensor_t *);
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private:
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void readCoefficients(void);
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int16_t readRawTemperature();
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int32_t readRawPressure();
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uint8_t read8(byte reg);
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int16_t readS16(byte reg);
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uint16_t read16(byte reg);
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void writeCommand(byte reg, byte value);
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uint8_t SPIxfer(uint8_t x);
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int32_t _sensorID;
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bmp183_calib_data _bmp183_coeffs;
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uint8_t _bmp183Mode;
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int8_t _cs, _clk, _miso, _mosi;
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};
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#endif
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