Writing S-Functions

Building an Ada S-Function

To use your Ada S-function with Simulink, you must build a MATLAB executable (MEX) file from the Ada source code for the S-function. Use the MATLAB mex command to perform this step.

The mex syntax for building an Ada S-function MEX file is

mex [-v] [-g] -ada SFCN.ads

where SFCN.ads is the name of the S-function's package specification.

For example, to build the timestwo S-function example that comes with Simulink, enter the command

mex -ada timestwo.ads

Note    To build a MEX file from Ada source code, using the mex tool, you must have previously installed a copy of version 3.2 (or higher) of the GNAT Ada95 compiler on your system. You can obtain the latest Solaris, Windows, and GNU-Linux versions of the compiler at the GNAT ftp site (ftp://cs.nyu.edu/pub/gnat). Make sure that the compiler executable is in MATLAB's command path so that the mex tool can find it.

Writing Callback Methods in Ada

Using an Ada S-Function in a Model