How to pass a structure parameter in simulink mask to C mex S-Function?

Hello everyone,

I am using C mex S-Function to simulate in simulink and want to pass a structure parameter in Initialization Commands of Mask Editor to it.The structure parameter is here, e.g.:

CtrlPara.Kvp = 0.2;

CtrlPara.Kvi = 10 ;

CtrlPara.Kip = 0.1;

CtrlPara.Kii = 0  ;

I want C mex S-Function to access the parameter Kvp.Kvi,Kip and Kii. I found two commands,which may be helpful.They are following:

ssGetSFcnParam

mxGetField

Answer 1

[Lucas Lebert]

Hi Huadian!

I think you already have most of the information! In the mdlInitializeSizes callback method you need to set the Number of SFcnParameters,e.g: ssSetNumSFcnParams(S, 1);

Depending on where you want to use the fields of the Structure you can access these with the commands you mentioned, e.g:

    const mxArray         *param = mxGetField(ssGetSFcnParam(S,0),0,"Kvp");
    real_T         *value = mxGetPr(param);

Now you can use the pointer value for your further calculations.

Thanks! ~Lucas