ssGetInputPortSignal (Writing S-Functions)

Get the address of a contiguous signal entering an input port.

Syntax

const void* ssGetInputPortSignal(SimStruct *S, inputPortIdx)

Arguments
S
SimStruct representing an S-function block.

inputPortIdx
Index of port whose sample time is required.

Description

Returns the address of the specified input port. A method should use this macro only if mdlIntializeSizes has specified that the elements of the input signal be contiguous, using ssSetInputPortRequiredContiguous.

Languages

C, C++

Example

The following code demonstrates the use of ssGetInputPortSignal.

nInputPorts = ssGetNumInputPorts(S);
    for (i = 0; i < nInputPorts; i++) {
        int_T nu = ssGetInputPortWidth(S,i);

    if ( ssGetInputPortRequiredContiguous(S,i) ) {
  
        const void *u = ssGetInputPortSignal(S,i);
        UseInputVectorInSomeFunction(u, nu);

        } else {

        InputPtrsType u  = ssGetInputPortSignalPtrs(S,i);
            for (j = 0; j < nu; j++) {
            UseInputInSomeFunction(*u[j]);
            }
        }
    }

If you know that the inputs are always real_T signals, the ssGetInputPortSignal line in the above code snippet would be:

const real_T *u = ssGetInputPortRealSignal(S,i);

ssGetInputPortSampleTimeIndex ssGetInputPortSignalAddress