Hello, I am presently attempting to run a Keithley 2612 sourcemeter in Matlab, but from the list of variables I obtain by the 'get' command I can't determine how to ask for data to be displayed in Matlab. Has anyone used this instrument?

Hello, I am presently attempting to run a Keithley 2612 sourcemeter in Matlab, but from the list of variables I obtain by the 'get' command I can't determine how to ask for data to be displayed in Matlab. Has anyone used this instrument? The variables I am told about from the get command are the follows:

    ByteOrder = littleEndian
    BytesAvailable = 0
    BytesAvailableFcn = 
    BytesAvailableFcnCount = 48
    BytesAvailableFcnMode = terminator
    BytesToOutput = 0
    ErrorFcn = 
    InputBufferSize = 512
    Name = Serial-COM4
    ObjectVisibility = on
    OutputBufferSize = 512
    OutputEmptyFcn = 
    RecordDetail = compact
    RecordMode = overwrite
    RecordName = record.txt
    RecordStatus = off
    Status = open
    Tag = 
    Timeout = 10
    TimerFcn = 
    TimerPeriod = 1
    TransferStatus = idle
    Type = serial
    UserData = []
    ValuesReceived = 0
    ValuesSent = 0

    SERIAL specific properties:
    BaudRate = 9600
    BreakInterruptFcn = 
    DataBits = 8
    DataTerminalReady = on
    FlowControl = none
    Parity = none
    PinStatus = [1x1 struct]
    PinStatusFcn = 
    Port = COM4
    ReadAsyncMode = continuous
    RequestToSend = on
    StopBits = 1
    Terminator = LF

[Md Naim Patoary]

Hi,

were you able to solve the issue later on? I am using the same SMU. Can you please help me with the information of which list of commands does the sourcemeter takes from matlab? I am trying to find them online so far. I connected my matlab to smu using Visa USB connection.

Thank you

Answer 1

[Walter Roberson]

None of those.

You have BytesAvailableFcnMode = terminator which hints that the communication with the device is probably in text form rather than in binary form (because in binary form, any given terminator byte value might occur accidentally.) If you want to see the data line by line you should use fgetl() on the device once per input line; if you are expecting a formatted block of numbers represented in text, then you would be more likely to use fscanf() on the device providing it with an appropriate format and size limit.

If you want data to be processed as it arrives you should set the BytesAvailableFcn property to the handle of a function that will read and process values.