Function ulDOutScan 

pub unsafe extern "C" fn ulDOutScan(
    daqDeviceHandle: DaqDeviceHandle,
    lowPort: DigitalPortType,
    highPort: DigitalPortType,
    samplesPerPort: c_int,
    rate: *mut f64,
    options: ScanOption,
    flags: DOutScanFlag,
    data: *mut c_ulonglong,
) -> UlError

Writes data to a range of digital ports. @param daqDeviceHandle the handle to the DAQ device @param lowPort number of the first port in the scan @param highPort number of the last port in the scan @param samplesPerPort the number of samples per port to write @param rate the number of times per second to write to each port (scan rate). Upon return, this value is set to the actual scan rate. @param options scan options @param flags reserved for future use @param data[] a pointer to an array to receive the digital data @return The UL error code.