Using multiple Event Listener

Hello,

I've created a Simulink file which contains ~5 blocks with permanently changing data. Now, I'd like to create an event listener for each block.

I've generated the following code for each block's startfcn:

   %The GUI handles are by default hidden, turn them on                      
set(0,'ShowHiddenHandles','on');                                          
%Set up the arguments that will go into the  block event callback listener
blk_SpO2 = 'Parameter_Final/SpO2';                                        
event = 'PostOutputs';                                                    
listener = @Gruppeneinteilung;                                            
%Create the listener                                                      
h = add_exec_event_listener(blk_SpO2, event, listener);

and

    %The GUI handles are by default hidden, turn them on                      
set(0,'ShowHiddenHandles','on');                                          
%Set up the arguments that will go into the  block event callback listener
blk_BD = 'Parameter_Final/BD';                                            
event = 'PostOutputs';                                                    
listener = @Gruppeneinteilung;                                            
%Create the listener                                                      
h = add_exec_event_listener(blk_BD, event, listener);

...

My problem is, Simulink only creates a listener for one of the 5 blocks. If I delete that block another one will have a listener and so on. But I'm not able to execute all these listeners at the same time.

Is there anyone who can help me?

greetings, franzi

Answer 1

[Daniel Shub]

I think the listeners you create with add_exec_event_listener are similar to the listeners you create with addlistener in MATLAB. I think you want the equvilent of the listeners you get with event.listener in MATLAB. The difference being that the listener h that you are creating gets deleted when you overwrite h, but adding your second listener. I think you need to make h an array

h(1) = add_exec_event_listener(blk_SpO2, event, listener);
h(2) = add_exec_event_listener(blk_BD, event, listener);

Answer 2

[Franzi]

Hi!

thanks for the fast answer!

Unfortunately, it doesn't work.

I get the following error message (with or without using arrays):

"Warning: Error occurred while evaluating listener callback. ??? Undefined function or method 'Gruppeneinteilung' for input arguments of type 'Simulink.RunTimeBlock'."

Gruppeneinteilung is my Matlab-File in which I process the block's data.

[Franzi]

it seems the error message doesn't have anything to do with my problem. It also appears when everything's working correctly (using just one block).

Answer 3

[Franzi]

tried it again and IT WORKS! :D

there is still only one listener visible in Simulink (antenna symbol) but my GUIDE- / Matlab- File works perfectly!

Thank you so much!

greetings,

franzi

Answer 4

[Gheorghe Schreiber]

Hello,

I have a problem which may be related to OP question, but may be slightly different as in the converse of OP.

I have one simulink model with one block containing ~48 changing signals, divided in 4 groups of 12.

I want to have 4 instances of MATLAB apps running simultaneously, each app monitoring 12 signals at a time.

Is this possible to have multiple listeners in one simulink model sending data to multiple MATLAB apps?

Thank you,

-Gheorghe S