MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur télécharger pdf (Page 70)

3 Writing S-Functions As C-MEX files

3-26

mdlProcessParameters

mdlProcessParameters is an optiona l routine that Simulink calls after

mdlCheckParameters changes and verifies parameters. The processing is done

at the top of the simulation loop when it i s safe to process t he change d

parameters. This routine can only be used in a C MEX S-function.

The p urpose of this routine is to process newly changed parameters. An

example is to cache parameter changes in work vectors. Simulink does not call

thisroutine when itis used withtheReal-TimeWorkshop. Therefore, ifyouuse

this routine in an S-function designed for use with the Real-Time Workshop,

youmustwrite yourS-functionsothat it doesn’trelyonthis routine.Todo this,

you must inline your S-function by using t he Target Language Compiler. S ee

The Target Language Compiler Reference Guide for information on inlining

S-functions.

The synopsis is:

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

#if defined(MDL_PROCESS_PARAMETERS) && defined(MATLAB_MEX_FILE)

static void mdlProcessParameters(SimStruct *S)

{

}

#endif /* MDL_PROCESS_PARAMETERS */

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur Page 70