MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Podręcznik Użytkownika Pobierz pdf (Strona 79)

Overview of the C MEX S-Function Routines

3-35

This is the code synopsis for mdSetOutputPortSampleTime:

#if defined(MDL_SET_OUTPUT_PORT_SAMPLE_TIME) && defined(MATLAB_MEX_FILE)

static void mdlSetOutputPortSampleTime(SimStruct *S,

int_T portIdx,

real_T sampleTime,

real_T offsetTime)

{

}

#endif /* MDL_SET_OUTPUT_PORT_SAMPLE_TIME */

See matlabrooot/simulink/src/sfun_multirate.c for an example.

mdlSetInputPortWidth

During vector-width propagation Simulink calls mdlSetInputPortWidth with

the candidate width for a dynamica l ly sized port. If the propose d width is

acceptable, the routine sets the actual port width using

ssSetInputPortWidth.

If the size is unacceptable an error is generated by

ssSetErrorStatus.Note

that any other dynamically sized input or output ports whose widths are

implicitlydefinedbythewidthofthegivenportcanalsohavetheirwidthsset

by calls to

ssSetInputPortWidth or ssSetOutputPortWidth.

The synopsis is:

#define MDL_SET_INPUT_PORT_WIDTH /* Change to #undef to remove function. */

#if defined(MDL_SET_INPUT_PORT_WIDTH) && defined(MATLAB_MEX_FILE)

void mdlSetInputPortWidth(SimStruct *S, int portIndex, int width)

{

}

#endif /* MDL_SET_INPUT_PORT_WIDTH */

For an example, see matlabroot/simulink/src/sfun_dynsize.c.

mdlSetOutputPortWidth

mdlSetOutputPortWidth works in the same way with output ports as

mdlSetInputPortWidth does with input ports.

The synopsis is:

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

#if defined(MDL_SET_OUTPUT_PORT_WIDTH) && defined(MATLAB_MEX_FILE)

void mdlSetOutputPortWidth(SimStruct *S, int portIndex, int width)

{

}

#endif /* MDL_SET_OUTPUT_PORT_WIDTH */

For an example, see matlabroot/simulink/src/sfun_dynsize.c.

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Podręcznik Użytkownika Strona 79