test code 123
Fork of LinkNode-Test by
nRF51822_Science_Journal/BMP180.h
- Committer:
- youkee
- Date:
- 2016-09-01
- Revision:
- 0:1ad0e04b1bc5
File content as of revision 0:1ad0e04b1bc5:
/******************************************************************************* * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #ifndef _BMP180_H_ #define _BMP180_H_ #include "mbed.h" /** * Bosch BMP180 Digital Pressure Sensor * * @code * #include <stdio.h> * #include "mbed.h" * #include "BMP180.h" * * I2C i2c(I2C_SDA, I2C_SCL); * BMP180 bmp180(&i2c); * * int main(void) { * * while(1) { * if (bmp180.init() != 0) { * printf("Error communicating with BMP180\n"); * } else { * printf("Initialized BMP180\n"); * break; * } * wait(1); * } * * while(1) { * bmp180.startTemperature(); * wait_ms(5); // Wait for conversion to complete * float temp; * if(bmp180.getTemperature(&temp) != 0) { * printf("Error getting temperature\n"); * continue; * } * * bmp180.startPressure(BMP180::ULTRA_LOW_POWER); * wait_ms(10); // Wait for conversion to complete * int pressure; * if(bmp180.getPressure(&pressure) != 0) { * printf("Error getting pressure\n"); * continue; * } * * printf("Pressure = %d Pa Temperature = %f C\n", pressure, temp); * wait(1); * } * } * @endcode */ class BMP180 { public: /** * @brief Oversampling ratio. * @details Dictates how many pressure samples to take. Conversion time varies * depending on the number of samples taken. Refer to data sheet * for timing specifications. */ typedef enum { ULTRA_LOW_POWER = 0, ///< 1 pressure sample STANDARD = 1, ///< 2 pressure samples HIGH_RESOLUTION = 2, ///< 4 pressure samples ULTRA_HIGH_RESOLUTION = 3, ///< 8 pressure samples } oversampling_t; /** * BMP180 constructor. * * @param sda mbed pin to use for SDA line of I2C interface. * @param scl mbed pin to use for SCL line of I2C interface. */ BMP180(PinName sda, PinName scl); /** * BMP180 constructor. * * @param i2c I2C object to use. */ BMP180(I2C *i2c); /** * BMP180 destructor. */ ~BMP180(); /** * @brief Initialize BMP180. * @details Gets the device ID and saves the calibration values. * @returns 0 if no errors, -1 if error. */ int init(void); /** * @brief Reset BMP180. * @details Performs a soft reset of the device. Same sequence as power on reset. * @returns 0 if no errors, -1 if error. */ int reset(void); /** * @brief Check ID. * @details Checks the device ID, should be 0x55 on reset. * @returns 0 if no errors, -1 if error. */ int checkId(void); /** * @brief Start pressure conversion. * @details Initiates the pressure conversion sequence. Refer to data sheet * for timing specifications. * * @param oss Number of samples to take. * @returns 0 if no errors, -1 if error. */ int startPressure(BMP180::oversampling_t oss); /** * @brief Get pressure reading. * @details Calculates the pressure using the data calibration data and formula. * Pressure is reported in Pascals. * @note This function should be called after calling startPressure(). * Refer to the data sheet for the timing requirements. Calling this * function too soon can result in oversampling. * * @param pressure Pointer to store pressure reading. * @returns 0 if no errors, -1 if error. */ int getPressure(int *pressure); /** * @brief Start temperature conversion. * @details Initiates the temperature conversion sequence. Refer to data * sheet for timing specifications. * @returns 0 if no errors, -1 if error. */ int startTemperature(void); /** * @brief Get temperature reading. * @details Calculates the temperature using the data calibration data and formula. * Temperature is reported in degrees Celcius. * * @note This function should be called after calling startTemperature(). * Refer to the data sheet for the timing requirements. Calling this * function too soon can result in oversampling. * * @param tempC Pointer to store temperature reading. * @returns 0 if no errors, -1 if error. */ int getTemperature(float *tempC); /** * @brief Get temperature reading. * @details Calculates the temperature using the data calibration data and formula. * Temperature is reported in 1/10ths degrees Celcius. * * @note This function should be called after calling startTemperature(). * Refer to the data sheet for the timing requirements. Calling this * function too soon can result in oversampling. * * @param tempCx10 Pointer to store temperature reading. * @returns 0 if no errors, -1 if error. */ int getTemperature(int16_t *tempCx10); private: typedef union { uint16_t value[11]; struct { int16_t ac1; int16_t ac2; int16_t ac3; uint16_t ac4; uint16_t ac5; uint16_t ac6; int16_t b1; int16_t b2; int16_t mb; int16_t mc; int16_t md; }; } calibration_t; I2C *i2c_; bool i2c_owner; BMP180::calibration_t calib; int32_t b5; BMP180::oversampling_t oss_; }; #endif /* _BMP180_H_ */