While it is easy to write Modelica functions, it is sometimes convenient to call a subroutine written in C or FORTAN. In this example an external C function is created and then used in a SystemModeler model.For a step by step tutorial see External Function—Chirp Signal.
A Chirp function is defined using an external C-function.
A Chirp block is defined using the function above.
The ChirpSignal block is used to test the resonance frequencies of an electrical circuit.