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synchronizing simulink with m-file

im need to synchronize output from simulink with MATLAB platform
currrently what im using is (running in matlab platform)
rto = get_param(gcb,'RuntimeObject');
blockData = rto.OutputPort(1).Data ;
but it only gives me one data and it requires me to run it manaully. Need it to run in MATLAB platform automatically and in sync with the Simulink model.
Advise/Direction needed thanks.

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2 Answers

Answer by Jarrod Rivituso on 14 Apr 2011
 Accepted Answer

You can add a listener callback that runs when the block creates outputs:
h = add_exec_event_listener(gcb, 'PostOutputs', @callbackFcn);
More information is found here under "Listening for Method Execution Events".

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I should mention also that there are blocks you can include in your model that will allow you to run MATLAB code from within Simulink, such as the "MATLAB Function" block, or the MATLAB S-function block.

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Answer by Tan Edwin on 18 Apr 2011

How do i actually add this code in?
let say my i want to call is:
function rto=access()
rto = get_param(gcb,'RuntimeObject');
blockData = rto.OutputPort(1).Data ;
rto %to get output into MATLAB workspace every iteration in simulink
So can i place the event listener into a lvl-1 S-function block or does it only works for lvl2 S-function block? where should i place it? in the update/output?

  6 Comments

Do you really want a .mat file for each time step? That seems excessive - there could easily be thousands of time steps in a single simulation.
The rules for the callback function are the same with any function. Each function is given its own workspace, which is separate from the base workspace.
What exactly are you trying to accomplish here? I have a hunch there may be other ways you could do this besides outputting a .mat file for each time step.
For instance, you can use signal logging to log simulation data throughout an entire simulation very easily:
http://www.mathworks.com/access/helpdesk/help/toolbox/simulink/ug/brh7636.html
Thanks alot for the advices. Will look into signal logging method.
By the way the link is not working.
Ooops, looks like it changed. Here ya go
http://www.mathworks.com/help/toolbox/simulink/ug/f11-47048.html

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