Zephyr Developer Summit 2022

Most embedded applications rely on the main loop design pattern to provide determinism and safety. Modern tools like Zephyr and C++20 make it possible to deviate from that approach to implement event-based applications which benefit from better modularity, scalability and readability. The main reason event-based applications have not found their way into embedded systems yet, is their dependency on heap allocations, lots of indeterministic run-time and other non-type-safe code. This talk will demonstrate how using C++20s powerful metaprogramming tools in combination with Zephyrs build system to describe event relationships during compile-time and using Zephyrs RTOS capabilities to dispatch event handling implicitly into the fitting execution contexts (irq, work queues, threads, ...) makes building an event-based application framework that is suited for embedded systems possible.