Acquire Digital Data in Hexadecimal Values

This example shows how to acquire digital data using four channels on an NI 6255.

Discover devices connected to your system and find the ID for the NI 6255.

dev = daqlist

dev =

  3×4 table

    DeviceID                Description                  Model             DeviceInfo       
    ________    ___________________________________    __________    _______________________

     "Dev1"     "National Instruments(TM) USB-6255"    "USB-6255"    [1×1 daq.ni.DeviceInfo]
     "Dev2"     "National Instruments(TM) USB-6363"    "USB-6363"    [1×1 daq.ni.DeviceInfo]

Create a DataAcquisition object and add four digital input lines from port 0 on Dev1.

d = daq("ni");
addinput(d,"Dev1","Port0/Line0:3","Digital");
d.Channels

ans = 

    Index    Type     Device       Channel       Measurement Type    Range           Name       
    _____    _____    ______    _____________    ________________    _____    __________________

      1      "dio"    "Dev1"    "port0/line0"      "InputOnly"       "n/a"    "Dev1_port0/line0"
      2      "dio"    "Dev1"    "port0/line1"      "InputOnly"       "n/a"    "Dev1_port0/line1"
      3      "dio"    "Dev1"    "port0/line2"      "InputOnly"       "n/a"    "Dev1_port0/line2"
      4      "dio"    "Dev1"    "port0/line3"      "InputOnly"       "n/a"    "Dev1_port0/line3"

Acquire digital data in hexadecimal values.

hData = binaryVectorToHex(read(d,"OutputFormat","Matrix"))

hData =

    'C'