It is indeed possible to call a Simulink function from an S-function. For a comprehensive understanding of the various methods to call a Simulink function, please refer to the following MathWorks documentation:
To learn about declaring a call from an S-function, you can consult the documentation on 'ssDeclareFunctionCaller':
For information on making the actual call at runtime using 'ssCallSimulinkFunction' (which should be implemented in either the mdlUpdate or mdlOutput methods), please see the following resource:
