Function SoapySDRDevice_writeUART 

pub unsafe extern "C" fn SoapySDRDevice_writeUART(
    device: *mut SoapySDRDevice,
    which: *const c_char,
    data: *const c_char,
) -> c_int

Write data to a UART device.

Its up to the implementation to set the baud rate, carriage return settings, flushing on newline. \param device a pointer to a device instance \param which the name of an available UART \param data a null terminated array of bytes \return 0 for success or error code on failure