MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur télécharger pdf (Page 195)

Fully Inlined S-Function with the mdlRTW Routine

4-29

}

return(TRUE);

} else {

return(FALSE);

}

/* end IsRealVect */

/*====================*

* S-function routines *

*====================*/

#define MDL_CHECK_PARAMETERS /* Change to #undef to remove function */

#if defined(MDL_CHECK_PARAMETERS) && defined(MATLAB_MEX_FILE)

/* Function: mdlCheckParameters ================================================

* Abstract:

* This routine will be called after mdlInitializeSizes, whenever

* parameters change or get re-evaluated. The purpose of this routine is

* to verify that the new parameter settings are correct.

* You should add a call to this routine from mdlInitalizeSizes

* to check the parameters. After setting your sizes elements, you should:

* if (ssGetSFcnParamsCount(S) == ssGetNumSFcnParams(S)) {

* mdlCheckParameters(S);

* }

static void mdlCheckParameters(SimStruct *S)

{

if (!IsRealVect(XVECT(S))) {

ssSetErrorStatus(S,”1st, X-vector parameter must be a real finite “

“ vector”);

return;

}

if (!IsRealVect(YVECT(S))) {

ssSetErrorStatus(S,”2nd, Y-vector parameter must be a real finite “

“vector”);

return;

}

* Verify that the dimensions of X and Y are the same.

if (mxGetNumberOfElements(XVECT(S)) != mxGetNumberOfElements(YVECT(S)) ||

mxGetNumberOfElements(XVECT(S)) == 1) {

ssSetErrorStatus(S,”X and Y-vectors must be of the same dimension “

“and have at least two elements”);

return;

}

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur Page 195