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 System Modeler model.

For a step by step tutorial see Using External Code.

Chirp

A Chirp function is defined using an external C-function.

ChirpSignal

A Chirp block is defined using the function above.

SeriesCircuit

The ChirpSignal block is used to test the resonance frequencies of an electrical circuit.