How to trigger a callback function in a GUI by a digital input signal (instead of mouse click/position)?

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Raph
Raph 2015-5-12
编辑： Raph 2015-5-12
I want to build a GUI for instrument control and data acquisition ("event-driven programming").
When running the GUI Matlab continuously checks if certain user-defined "events" happen, e.g. "mouse click in region ..." or "mouse pointer is over region ..." and calls a user-defined callback function when such events occur.
I have a digital input signal (accessed via readDigitalPin(a,pin), where a is an arduino object), and I want to execute a certain callback function when this input goes from Low to High or vice versa.
How can I make Matlab "continuously" listen to this input (as for the mouse position/click)?
From
http://ch.mathworks.com/help/matlab/creating_guis/how-does-a-gui-work.html?refresh=true
"In the case of MATLAB UIs, most events are user interactions with the UI, but the UI can respond to other kinds of events as well , for example, the creation of a file or connecting a device to the computer."
I conclude that this functionality is available but I would need some reference describing its implementation.
Thanks for your inputs, Raph

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