How to execute timer functions in MATLAB GUI in parallel?

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RZM 2018-8-15

1
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https://ww2.mathworks.cn/matlabcentral/answers/414967-how-to-execute-timer-functions-in-matlab-gui-in-parallel

评论： Geoff Hayes 2022-7-1

I have designed a GUI using MATLAB GUIDE. I need to execute two timer functions in parallel. Let's say we have a timer and its function defined inside the GUI as follows:

handles.data_acq_tmr = timer(...
    'ExecutionMode', 'fixedRate', ...
    'Period', 0.2, ...
    'Busymode','queue',...
    'TimerFcn', {@data_read, hObject});
function data_read(~,~,hObject,~)
handles = guidata(hObject);
% do some processing here
guidata(hObject,handles);

and the second timer as follows:

handles.dataproc_tmr = timer(...
    'ExecutionMode', 'singleShot', ...
    'StartDelay', 0,...
    'Busymode','queue',...
    'TimerFcn', {@data_proc, hObject});
function data_proc(~,~,hObject,~)
handles = guidata(hObject);
% do some other processing here
guidata(hObject,handles);

Is there any way to do it in MATLAB for instance using Parallel Computing Toolbox?

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Geoff Hayes 2018-8-17

RZM - what are the callbacks for your timers doing? Are they performing complex and/or expensive operations?

RZM 2018-8-17

编辑：RZM 2018-8-17

One reads the data transferred from another computer, and the other one does some processing on a sequence of recorded data including filtering, and some expensive operations on multiple variables. There are some other timers to control the presentation of some visual stimuli on the screen.

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回答（1 个）

Sean de Wolski 2018-8-15

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414967-how-to-execute-timer-functions-in-matlab-gui-in-parallel#answer_332845

Use parfeval in the parallel computing toolbox to asynchronously run the computationally expensive algorithmic (not gui updates etc.) part in the background. Use a timer to poll the job for when its state is "finished" for when it's done to update the user interface.