Complete library for whole scientific pre-final
Dependencies: BOX_1
Diff: ENVIROMENTAL/BME280.h
- Revision:
- 0:f8a9cceb4186
diff -r 000000000000 -r f8a9cceb4186 ENVIROMENTAL/BME280.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ENVIROMENTAL/BME280.h Mon Jun 10 12:50:02 2019 +0000 @@ -0,0 +1,115 @@ + /** + * Library for "BME280 temperature, humidity and pressure sensor module" from Switch Science + * https://www.switch-science.com/catalog/2236/ + * + * For more information about the BME280: + * http://ae-bst.resource.bosch.com/media/products/dokumente/bme280/BST-BME280_DS001-10.pdf + */ + +#ifndef MBED_BME280_H +#define MBED_BME280_H + +#include "mbed.h" + +#define DEFAULT_SLAVE_ADDRESS (0x76 << 1) + +#ifdef _DEBUG +//extern Serial pc; +#define DEBUG_PRINT(...) pc.printf(__VA_ARGS__) +#else +#define DEBUG_PRINT(...) +#endif + +/** Interface for controlling BME280 Combined humidity and pressure sensor + * + * @code + * #include "mbed.h" + * #include "BME280.h" + * + * Serial pc(USBTX, USBRX); + * + * #if defined(TARGET_LPC1768) + * BME280 sensor(p28, p27); + * #else + * BME280 sensor(I2C_SDA, I2C_SCL); + * #endif + * + * int main() { + * + * while(1) { + * pc.printf("%2.2f degC, %04.2f hPa, %2.2f %%\n", sensor.getTemperature(), sensor.getPressure(), sensor.getHumidity()); + * wait(1); + * } + * } + * + * @endcode + */ + +/** BME280 class + * + * BME280: A library to correct environmental data using Boshe BME280 environmental sensor device + * + */ +class BME280 +{ +public: + + /** Create a BME280 instance + * which is connected to specified I2C pins with specified address + * + * @param sda I2C-bus SDA pin + * @param scl I2C-bus SCL pin + * @param slave_adr (option) I2C-bus address (default: 0x76) + */ + BME280(PinName sda, PinName sck, char slave_adr = DEFAULT_SLAVE_ADDRESS); + + /** Create a BME280 instance + * which is connected to specified I2C pins with specified address + * + * @param i2c_obj I2C object (instance) + * @param slave_adr (option) I2C-bus address (default: 0x76) + */ + BME280(I2C &i2c_obj, char slave_adr = DEFAULT_SLAVE_ADDRESS); + + /** Destructor of BME280 + */ + virtual ~BME280(); + + /** Initializa BME280 sensor + * + * Configure sensor setting and read parameters for calibration + * + */ + void initialize(void); + + /** Read the current temperature value (degree Celsius) from BME280 sensor + * + */ + float getTemperature(void); + + /** Read the current pressure value (hectopascal)from BME280 sensor + * + */ + float getPressure(void); + + /** Read the current humidity value (humidity %) from BME280 sensor + * + */ + float getHumidity(void); + +private: + + I2C *i2c_p; + I2C &i2c; + char address; + uint16_t dig_T1; + int16_t dig_T2, dig_T3; + uint16_t dig_P1; + int16_t dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9; + uint16_t dig_H1, dig_H3; + int16_t dig_H2, dig_H4, dig_H5, dig_H6; + int32_t t_fine; + +}; + +#endif // MBED_BME280_H