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Compute the signals that this block emits




C, C++


void mdlOutputs(SimStruct *S, int_T tid)



SimStruct representing an S-Function block.


Task ID.


The Simulink® engine invokes this required method at each simulation time step. The method should compute the S-function's outputs at the current time step and store the results in the S-function's output signal arrays.

The tid (task ID) argument specifies the task running when the mdlOutputs routine is invoked. You can use this argument in the mdlOutputs routine of a multirate S-Function block to encapsulate task-specific blocks of code (see Multirate S-Function Blocks).

Use the UNUSED_ARG macro if the S-function does not contain task-specific blocks of code to indicate that the tid input argument is required but not used in the body of the callback. To do this, insert the line


after the declarations in mdlOutputs.


If you have Simulink Coder™, when generating code for a noninlined S-function that contains this method, make sure the method is not wrapped in a #if defined(MATLAB_MEX_FILE) statement. For example:

#if defined(MATLAB_MEX_FILE) 
static void mdlOutputs(SimStruct *S) 
   /* Add mdlOutputs code here *

The define statement makes the mdlOutputs method available only to a MATLAB® MEX file. If the S-function is not inlined, the Simulink Coder product cannot use this method, resulting in link or run-time errors.


For an example of an mdlOutputs routine that works with multiple input and output ports, see sfun_multiport.c.

Introduced before R2006a