Re-enable a callback function

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!

Answer 1

[Guillaume]

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.

[Aon]

Works perfect thanks!