Implementing hierarchical state machines doesn¹t mean you have to use code-synthesizing tools. Here are some techniques for simple, efficient, and direct mapping of state machines to C or C++.

Every operating system has different mechanisms approaches to handling interrupts. This article lays out the specifics of handling interrupts in Linux. It presents an overview of the Linux runtime environment discusses how to communicate with hardware peripherals provides a working example of servicing an interrupt from application code.