MATLAB: GUI for a Simulink realtime workshop model setting values for gain constans etc

Question

Hi all,

I am currently writing a GUI program in matlab for a simulink real time workshop model. I wish my GUI to control an external plant. I wish the user to be able to edit system variables (such as P I and D of a PID controller) using my GUI. I have had significant difficulty with thus. If this were a non realtime simulink model I would use the following :

options = simset('SrcWorkspace','current');

sim('model.mdl',[],options);

To set the simulations workspace to be the same as the GUI’s, and then simply create the variables in the workspace that I wished to input into my model. Unfortunately using this method is not possible as it not possible to use the sim() command with a real time system. It is instead run using the commands:

set_param('model','SimulationMode','external');

set_param('model','SimulationCommand','connect');

set_param('model','SimulationCommand','start');

I would be most grateful if anyone could point me in the right direction.

Thanks,

Paul

Answer 1

Go to your document, Real-Time Workshop->External Mode->Using the External Mode User Interface->Parameter Downloading,

There are instructions regarding downloading parameters. If you are not doing batch downloading, you can use set_param() the same way as you do in a normal mode. Pay attention if you want to change parameters for a source block.