MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur télécharger pdf (Page 153)

The C MEX S-Function SimStruct

3-109

ssGetOutputPortOffsetTime

(S,outputPortIdx)

Canbeusedinanyroutine(exceptmdlInitializeSizes)

to determine the offset time of an output port. This

should only be used if you have specified port-based

sample times.

ssGetOutputPortRealSignal

(S,outputPortIdx)

Canbeusedinanysimulationlooproutine,

mdlInitializeConditions,ormdlStart to access an

output port signal where the output port index starts at

0 and must be less than the number of output ports. This

returns a contiguous

real_T vector of length equal to the

width of the output port. For example, to write to all

output ports, you would use:

int_T i,j;

int_T nOutputPorts = ssGetNumOutputPorts(S);

for (i = 0; i < nOutputPorts; i++) {

real_T *y = ssGetOutputPortRealSignal(S,i);

int_T ny = ssGetOutputPortWidth(S,i);

for (j = 0; j < ny; j++) {

y[j] = SomeFunctionToFillInOutput();

}

Table 3-8: Parameter SimStruct Macros

Macros Description

ssSetNumSFcnParams

(S,nSFcnParams)

Used in mdlInitializeSizes to set the number of S-function

parameters.

ssGetSFcnParamsCount

(S)

Used in mdlInitializeSizes t o get the number of parameters

entered by in the S-function block dialog box.

Table 3-7: Input and Output Port Signal SimStruct Macros (Continued)

Macro Description

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 209 210

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MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guide de l'utilisateur Page 153