U2C_RESULT U2C_ReleaseSda(
      HANDLE hDevice
);
The U2C_ReleaseSda() function releases the SDA line of the I2C bus. If the line is not pulled down by I2C slave device, it will get high.
Parameters:
- hDevice
- Handle to the U2C-12 device. 
Return values:
U2C_SUCCESS
The SDA line was successfully released.
U2C_HARDWARE_NOT_FOUND
U2C-12 device referenced by hDevice handle was not found.