Problems with BytesAvailableFcn in App designer

I write in this forum to see if someone could help me solve the problem I have with the BytesAvailableFn function. I am developing an interface using the matlab app designer but when I run the code the program does not access the read function (I have put a debug to check it) and I do not understand where the error may be. The problem is that this code works in Guide but in App designer it does not. Thank you very much I hope for your help. I enclose a fragment of the code:

            app.t_waveforms.BytesAvailableFcnMode = 'byte';

            app.t_waveforms.BytesAvailableFcnCount = app.buffer + 8;

            set (app.t_waveforms.BytesAvailableFcn, @read);

Answer 1

[Chris Portal]

This was covered in a related post available here:

https://www.mathworks.com/matlabcentral/answers/276824-how-to-use-bytesavailablefcn-for-serial-communication-in-app-designer

[Guillermo Cid Espinosa]

I changed the code to write it as in the link that you have passed but still the program does not access to the @read function.

[Guillermo Cid Espinosa]

Thank you very much. I finally managed to solve it. The problem was that in the @read function it was necessary to declare more input arguments.

[wu xianhua]

i have the same problem, have the solution yet ? ths