VTT TinyNode, slightly modified code from example (https://developer.mbed.org/users/jejuho/code/VTT_NODEV3_BMP180_Si7021)
Dependencies: BLE_API TMP_nrf51 mbed nRF51822
Fork of VTT_NODEV3_BMP180_Si7021 by
Si7021.h
- Committer:
- jejuho
- Date:
- 2016-01-25
- Revision:
- 2:b221ba23b37f
File content as of revision 2:b221ba23b37f:
#ifndef SI7021_H #define SI7021_H #include "mbed.h" #define SI7021_ADDR 0x80 #define SI7021_CONTROL_BYTE 0x3A //Reset settings (default values ok, no need to write) #define SI7021_MEASURE_RH_HOLD_MASTER 0xE5 #define SI7021_MEASURE_RH_NO_HOLD_MASSTER 0xF5 #define SI7021_MEASURE_TEMPERATURE_HOLD_MASTER 0xE3 #define SI7021_MEASURE_TEMPERATURE_NO_HOLD_MASTER 0xF3 #define SI7021_READ_TEMPERATURE 0xE0 #define SI7021_RESET 0xFE #define SI7021_WRITE_USER_REG1 0xE6 #define SI7021_READ_USER_REG1 0xE7 #define SI7021_READ_EID1_1 0xFA #define SI7021_READ_EID1_2 0x0F #define SI7021_READ_EID2_1 0xFC #define SI7021_READ_EID2_2 0xC9 #define SI7021_READ_FW_REVISION_1 0x84 #define SI7021_READ_FW_REVISION_2 0xB8 class SI7021_I2C { public: SI7021_I2C(PinName sda, PinName scl); float Measure_Temp(void); void Measure_Humidity_Temp(float *humidity, float *temperature); private: float get_HumidityTemp(void); uint8_t readBytes(uint8_t *values, int8_t length, bool waitConversion); I2C i2c_; }; #endif