mirror of
https://github.com/adafruit/Adafruit-BMP085-Library.git
synced 2026-07-28 04:16:25 +00:00
Emil Angelov
806d8d1556
The description comments for the return types of readRawTemperature() and readRawPressure() are wrong. There is no point to add this information in the comments anyway, as it is easily visible in the function declaration. In addition it is easy to change the type and to forget to update the comment too.
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/*!
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* @file Adafruit_BMP085.h
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*
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* This is a library for the Adafruit BMP085/BMP180 Barometric Pressure + Temp
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* sensor
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*
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* Designed specifically to work with the Adafruit BMP085 or BMP180 Breakout
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* ----> http://www.adafruit.com/products/391
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* ----> http://www.adafruit.com/products/1603
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*
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* These displays use I2C to communicate, 2 pins are required to
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* interface
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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 Limor Fried/Ladyada for Adafruit Industries.
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* BSD license, all text above must be included in any redistribution
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*/
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#ifndef ADAFRUIT_BMP085_H
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#define ADAFRUIT_BMP085_H
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#include <Adafruit_I2CDevice.h>
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#include <Arduino.h>
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#define BMP085_DEBUG 0 //!< Debug mode
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#define BMP085_I2CADDR 0x77 //!< BMP085 I2C address
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#define BMP085_ULTRALOWPOWER 0 //!< Ultra low power mode
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#define BMP085_STANDARD 1 //!< Standard mode
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#define BMP085_HIGHRES 2 //!< High-res mode
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#define BMP085_ULTRAHIGHRES 3 //!< Ultra high-res mode
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#define BMP085_CAL_AC1 0xAA //!< R Calibration data (16 bits)
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#define BMP085_CAL_AC2 0xAC //!< R Calibration data (16 bits)
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#define BMP085_CAL_AC3 0xAE //!< R Calibration data (16 bits)
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#define BMP085_CAL_AC4 0xB0 //!< R Calibration data (16 bits)
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#define BMP085_CAL_AC5 0xB2 //!< R Calibration data (16 bits)
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#define BMP085_CAL_AC6 0xB4 //!< R Calibration data (16 bits)
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#define BMP085_CAL_B1 0xB6 //!< R Calibration data (16 bits)
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#define BMP085_CAL_B2 0xB8 //!< R Calibration data (16 bits)
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#define BMP085_CAL_MB 0xBA //!< R Calibration data (16 bits)
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#define BMP085_CAL_MC 0xBC //!< R Calibration data (16 bits)
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#define BMP085_CAL_MD 0xBE //!< R Calibration data (16 bits)
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#define BMP085_CONTROL 0xF4 //!< Control register
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#define BMP085_TEMPDATA 0xF6 //!< Temperature data register
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#define BMP085_PRESSUREDATA 0xF6 //!< Pressure data register
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#define BMP085_READTEMPCMD 0x2E //!< Read temperature control register value
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#define BMP085_READPRESSURECMD 0x34 //!< Read pressure control register value
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/*!
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* @brief Main BMP085 class
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*/
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class Adafruit_BMP085 {
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public:
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Adafruit_BMP085();
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/*!
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* @brief Starts I2C connection
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* @param mode Mode to set, ultra high-res by default
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* @param wire The I2C interface to use, defaults to Wire
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* @return Returns true if successful
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*/
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bool begin(uint8_t mode = BMP085_ULTRAHIGHRES, TwoWire *wire = &Wire);
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/*!
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* @brief Gets the temperature over I2C from the BMP085
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* @return Returns the temperature
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*/
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float readTemperature(void);
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/*!
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* @brief Gets the pressure over I2C from the BMP085
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* @return Returns the pressure
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*/
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int32_t readPressure(void);
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/*!
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* @brief Calculates the pressure at sea level
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* @param altitude_meters Current altitude (in meters)
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* @return Returns the calculated pressure at sea level
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*/
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int32_t readSealevelPressure(float altitude_meters = 0);
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/*!
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* @brief Reads the altitude
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* @param sealevelPressure Pressure at sea level, measured in pascals
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* @return Returns the altitude
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*/
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float readAltitude(float sealevelPressure = 101325); // std atmosphere
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/*!
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* @brief Reads the raw temperature
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* @return Returns the raw temperature
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*/
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uint16_t readRawTemperature(void);
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/*!
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* @brief Reads the raw pressure
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* @return Returns the raw pressure
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*/
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uint32_t readRawPressure(void);
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private:
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int32_t computeB5(int32_t UT);
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uint8_t read8(uint8_t addr);
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uint16_t read16(uint8_t addr);
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void write8(uint8_t addr, uint8_t data);
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Adafruit_I2CDevice *i2c_dev;
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uint8_t oversampling;
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int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;
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uint16_t ac4, ac5, ac6;
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};
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#endif // ADAFRUIT_BMP085_H
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