Re-enable a callback function
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Hi!
I use the imaq toolbox and the FramesAcquiredFcn to process a frame with a hardware trigger sensor.
If an error in the processing occurs for some reason I stop getting frames and the following message shows:
Warning: The FramesAcquiredFcn callback is being disabled.
To enable the callback, set the FramesAcquiredFcn property.
I want the callback to become re-enabled as soon as its been disabled so it waits for the next trigger again.
If the solution is to "set the FramesAcquiredFcn property" as the errormessage say, how do I do that?
Thanks in advance!
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Accepted Answer
Guillaume
on 19 May 2019
Probably, the simplest thing would be to prevent the error being detected and hence the callback from being disabled. For that I'd wrap your callback in a try ... catch block:
try
% your normal callback code
catch ME
warning('The error "%s" occured during frame processing', ME.message);
end
The above issues a warning with the error message instead. You may want to make that the callback function which in turn calls your processing function.
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