visade, not able to use instrument driver

moving to visadev, and old code no longer working and can't find anything useful on line to sovle this.

my simple code:

VisaObj = visadev("TCPIP0::VEN-L000015::inst0::INSTR");

if isempty(VisaObj)

interfaceObj = tcpclient('127.0.0.1', 1861);

else

clear VisaObj;

interfaceObj = VisaObj(1);

end

deviceObj = icdevice('lecroy_basic_12bit_driver.mdd', VisaObj);

% Connect device object to hardware.

connect(deviceObj);

% Execute device object function(s).

groupObj = get(deviceObj, 'Util');

invoke(groupObj, 'sendcommand', "*IDN?");

val = invoke(groupObj, 'readresponse',"%s");

disp(val);

the bold line gives the error:

Error using icdevice

HWOBJ must be an interface object.

previous code still working but is deprecated:

interfaceObj = instrfind('Type', 'tcpip', 'RemoteHost', '127.0.0.1', 'RemotePort', 1861, 'Tag', '');

if isempty(interfaceObj)

interfaceObj = tcpip('127.0.0.1', 1861);

else

fclose(interfaceObj);

interfaceObj = interfaceObj(1);

end

deviceObj = icdevice('lecroy_basic_driver.mdd', interfaceObj);

any suggestion is wellcome

Answer 1

[Pravarthana P]

Hi Maurizio Mastrofini,

The ‘visadev’ object with icdevice is not currently supported in MATLAB R2022a.

There are two possible workarounds to resolve this:

1. Can continue using ‘visa’ objects with icdevice in R2022a. Support for icdevice with ‘visadev’ is planned for a future release.
2. If your instrument model has an IVI-C driver, you can use the new ividev interface instead of icdevice.

a. If a supported ividev MATLAB driver exists for the instrument’s IVI-C driver you can use ividev.

Refer to the following documentation page to check whether a supported MATLAB driver exists and for usage examples: https://www.mathworks.com/help/instrument/supported-ivi-drivers.html

b. If supported ividev MATLAB driver does not exist for the instrument’s IVI-C driver, you can use ividev with the class compliant driver (IviScope, IviFgen etc) and the instrument’s IVI-C driver.

To use option b, the following setup has to be followed:

1. Install NI-VISAand IVI Complicance Package (IVI CP), this can be done simply by installing the "Instrument Control Toolbox Support Package for National Instruments VISA and ICP Interfaces" support package from Add-On Explorer.

2. Install Instrument Control Toolbox Support Package for IVI and VXIplug&play Drivers to get the class compliant “IviDCPwr” MATLAB Driver.

3. Install “hp66xxa” IVI-C driver for the DC Power supply 'HP 6654A'. The “hp66xxa” driver is authored by NI and you can download it from their weblink below -- use the LabWindows/CVI version link inside.

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E90E8659CE034080020E74861

4. Reboot computer

If your instrument model has an IVI-C driver and if you use ividev, follow the below steps:

% Check if IVI-C driver for DC Power Supply is installed

>>ividriverlist

Follow the documentation link for ‘iviconfigurationstore’ steps

Use IVI-C Class-Compliant Drivers - MATLAB & Simulink (mathworks.com)

Kindly refer to the following links to get more information on "ividev":

https://www.mathworks.com/help/instrument/supported-ivi-drivers.html

https://www.mathworks.com/help/instrument/ivi-and-vxi-plug-and-play-drivers.html

https://www.mathworks.com/help/instrument/transition-your-code-to-ividev-interface.html

Hope this information helps you!