Timer Interrupt in App Designer

14 次查看（过去 30 天）
Hossam Alzomor
Hossam Alzomor 2019-10-21
评论： Guillaume 2019-10-21
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?

请先登录，再回答此问题。

采纳的回答

Guillaume
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
Hossam Alzomor 2019-10-21
Thanks for reply
after doing modification I get another error
Error while evaluating TimerFcn for timer 'timer-1'
Matrix dimensions must agree.
Guillaume
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.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Develop Apps Using App Designer 的更多信息

标签

产品


版本

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by