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Firmware applications are often designed as tightly coupled monoliths. This can make it difficult to reuse code from one product to the next, because adding or removing a feature will require making changes across the codebase. The problem is compounded when multiple products with similar (but not identical) featuresets need to be supported in the field concurrently. Commonly, applications will be rewritten from the ground up, or large parts copy-and-pasted, even when only one or two features have changed. This wastes developer time and increases opportunities for introducing new bugs. We can take inspiration from the microservices architecture common in the Cloud world to instead build a set of fine-grained, loosely coupled modules that can be composed into larger applications. Because these modules are self-contained, we can add or remove only those necessary to create the next version of our application, while reusing modules for common features and functionality. While providing an overview of this architecture at a conceptual level, this talk will also show how Zephyr features like zbus, kconfig, and iterable sections can be used to implement this architecture.
Sam is an experienced embedded software engineer who has built and shipped consumer electronics and IoT devices used by millions around the world. He currently leads Firmware Engineering for Golioth and sits on the Zephyr Technical Steering Committee.
