Hi Ima,
To handle VISA errors and retry invoke commands in MATLAB, you can use a combination of error handling and retry logic. Here’s a basic example of how you might structure your script to achieve this:
- Define your device and connection settings:
deviceObj = icdevice('DPO7254.mdd', interfaceObj);
set(interfaceObj, 'OutputBufferSize', 2*DSO_DATA_SIZE + 10000);
connect(deviceObj);
groupObj = get(deviceObj, 'Waveform');
set(deviceObj.Waveform(1), 'Precision', 'int16');
2. You can Implement error handling and retry logic similar to the below logic:
maxRetries = 3; % Maximum number of retries
retryCount = 0;
success = false;
while ~success && retryCount < maxRetries
try
[CH1, T_measure] = invoke(groupObj, 'readwaveform', 'channel1', true);
[CH2, T_measure] = invoke(groupObj, 'readwaveform', 'channel2', true);
[CH3, T_measure] = invoke(groupObj, 'readwaveform', 'channel3', true);
[CH4, T_measure] = invoke(groupObj, 'readwaveform', 'channel4', true);
success = true; % If no error, set success to true
catch ME
retryCount = retryCount + 1;
fprintf('Error occurred: %s\n', ME.message);
fprintf('Retrying %d/%d...\n', retryCount, maxRetries);
pause(1); % Pause before retrying
end
end
if ~success
error('Failed to read waveform after %d attempts.', maxRetries);
end
The above code attempts to read waveforms from the oscilloscope up to three times if an error occurs. If the command fails after the maximum number of retries, it throws an error.
To resolve VISA issues you can refer to these documentation provided by MathWorks:
- https://www.mathworks.com/help/instrument/resolve-visa-connection-errors.html
- https://www.mathworks.com/help/instrument/troubleshooting-visa-interface.html
Hope this helps!
