Timer Interrupt in App Designer
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Hi,
I am trying to implement a timer interrupt in app designer,
I did the following
- define t in properties
- init timer in startupFcn
app.t=timer;
app.t.TimerFcn = @DisplayFPS;
app.t.Period =1;
app.t.ExecutionMode = 'fixedRate';
- implement timer callback function inside private methods
function DisplayFPS(app,mTimer,~)
framerate= app.framescount/app.framestime;
message = sprintf("Frame rate = %f f/s",framerate);
app.ResultTextArea.Value = [message;app.ResultTextArea.Value];
app.framescount = 0;
app.framestime = 0;
end
but I get the following error when I start
Error while evaluating TimerFcn for timer 'timer-2'
Undefined function 'DisplayFPS' for input arguments of type 'timer'.
How could I overcome this problem?
采纳的回答
Guillaume
2019-10-21
app.t.TimerFcn = @app.DisplayFPS; %<--DisplayFPS is a method of the app, so must be called with app argument
2 个评论
Hossam Alzomor
2019-10-21
Guillaume
2019-10-21
So, it's calling your callback now, but there's a bug in your callback.
Possibly app.framescount or app.framestime is not scalar.
We'd need to see the full error message to be sure. In any case, that's nothing to do with your original question.
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