BMP180用ライブラリ
Dependents: 2017_11_1768 2017_11_1768 201803_oshima_jodan 201803_oshima_gedan
Fork of BMP180 by
BMP180.h
- Committer:
- spiridion
- Date:
- 2014-03-17
- Revision:
- 1:072073c79cfd
- Parent:
- 0:9a0671b6009f
- Child:
- 2:5230f93e755b
File content as of revision 1:072073c79cfd:
/* @file BMP180.h @brief Barometric Pressure and Temperature Sensor BMP180 Breakout I2C Library @Author spiridion (http://mailme.spiridion.net) Tested on LPC1768 and FRDM-KL25Z Copyright (c) 2014 spiridion Released under the MIT License (see http://mbed.org/license/mit) Documentation regarding the BMP180 can be found here: http://mbed.org/media/uploads/spiridion/bst-bmp180-ds000-09.pdf */ #ifndef BMP180_H #define BMP180_H #include "mbed.h" /// default address is 0xEF #define BMP180_I2C_ADDRESS 0xEF // Oversampling settings #define BMP180_OSS_ULTRA_LOW_POWER 0 // 1 sample and 4.5ms for conversion #define BMP180_OSS_NORMAL 1 // 2 samples and 7.5ms for conversion #define BMP180_OSS_HIGH_RESOLUTION 2 // 4 samples and 13.5ms for conversion #define BMP180_OSS_ULTRA_HIGH_RESOLUTION 3 // 8 samples and 25.5ms for conversion #define UNSET_BMP180_PRESSURE_VALUE 0.F #define UNSET_BMP180_TEMPERATURE_VALUE -273.15F // absolute zero /** BMP180 class. * Read Pressure and temperature from the BMP180 Breakout I2C sensor * * Example: * @code * #include "mbed.h" * #include "BMP180.h" * * #if defined(TARGET_LPC1768) * #define PIN_SDA p9 * #define PIN_SCL p10 * #elif defined(TARGET_KL25Z) // watch out for the PTE0/PTE1 mixed up in the KL25Z doc * #define PIN_SDA PTE0 * #define PIN_SCL PTE1 * #endif * * int main() * { * BMP180 bmp180(PIN_SDA, PIN_SCL); * float pressure, temperature; * * // bmp180.Initialize(); // no altitude compensation and normal oversampling * bmp180.Initialize(64, BMP180_OSS_ULTRA_LOW_POWER); // 64m altitude compensation and low power oversampling * * while(1) * { * if (bmp180.ReadData(&pressure, &temperature)) * printf("Pressure(hPa): %8.2f \t Temperature(C): %8.2f\n", pressure, temperature); * wait(1); * } * } * @endcode */ class BMP180 { public: /** Create a BMP180 instance * @param sda pin * @param scl pin * @param address: I2C slave address */ BMP180(PinName sda, PinName scl, int address = BMP180_I2C_ADDRESS); /** Create a BMP180 instance * @param i2c object * @param address: I2C slave address */ BMP180(I2C& i2c, int address = BMP180_I2C_ADDRESS); /** Initialization: set member values and read BMP180 calibration parameters * @param altitude (in meter) * @param overSamplingSetting */ int Initialize(float altitude = 0.F, int overSamplingSetting = BMP180_OSS_NORMAL); /** Read pressure and temperature from the BMP180. * @param pressure (hPa) * @param temperature (C) * @returns * 1 on success, * 0 on error */ int ReadData(float* pTemperature = NULL, float* pPressure = NULL); /** Get temperature from a previous measurement * * @returns * temperature (C) */ float GetTemperature() {return m_temperature;}; /** Get pressure from a previous measurement * * @returns * pressure (hPa) */ float GetPressure() {return m_pressure;}; protected: /** Perform temperature measurement * * @returns * temperature (C) */ int ReadRawTemperature(long* pUt); /** Perform pressure measurement * * @returns * temperature (C) */ int ReadRawPressure(long* pUp); /** Calculation of the temperature from the digital output */ float TrueTemperature(long ut); /** Calculation of the pressure from the digital output */ float TruePressure(long up); int m_oss; float m_temperature; float m_pressure; float m_altitude; I2C m_i2c; int m_addr; char m_data[4]; short ac1, ac2, ac3; unsigned short ac4, ac5, ac6; short b1, b2; short mb, mc, md; long x1, x2, x3, b3, b5, b6; unsigned long b4, b7; }; #endif