Writing S-Functions

S-Function Module Names for Real-Time Workshop Builds

If your S-function is built with multiple modules, you must provide the build process names of additional modules. You can do this through the Real-Time Workshop template makefile technology, or more conveniently by using the set_param MATLAB command. For example, if your S-function is built with multiple modules, as in

mex sfun_main.c sfun_module1.c sfun_module2.c

then specify the names of the modules without the extension using the command

set_param(sfun_block,'SFunctionModules','sfun_module1 sfun_module2')

The parameter can also be a variable as in

modules = 'sfun_module1 sfun_module2'
set_param(sfun_block,'SFunctionModules','modules')

or a string to be evaluated (this is needed when the modules are valid identifiers).

set_param(sfun_block,'SFunctionModules','''sfun_module1 sfun_module2''')

Noninlined S-Functions

Writing Wrapper S-Functions