i2c_sensor.repl

/* Add the I2C controller to the sysbus.
   The address and the position of the Interrupts can be obtained from the
   data sheet of the STM32F4. We are only adding one I2C, but the platform
   supports 3.
*/
i2c1: I2C.STM32F4_I2C @ sysbus 0x40005400
    EventInterrupt -> nvic@31
    ErrorInterrupt -> nvic@32

/* Add the sensor to the i2c1 controller we just created.
   The address is the 7bit address you find on the data sheet.
   Remember this address needs to coincide with the one on the data sheet.
   It may be tempting to add several sensors of the same model on different
   addresses, but this is not correct. Remember this sensor has only one fixed
   address that you can not configure.
*/
sensor_si7021: Sensors.SI70xx @ i2c1 0x40
    model: Model.SI7021