OSS + ELC EU 2026

The Zephyr USB host stack is still evolving and remains an experimental subsystem for many real-world applications. This session presents practical experience in enabling key USB host classes in Zephyr, including UVC (USB Video Class), CDC-ECM, and USB Hub support, along with a series of architectural improvements to the host stack.
The presentation highlights the challenges and lessons learned while bringing these features to Zephyr, including attach/detach handling, dynamic class matching for composite devices, device lifecycle management across class drivers, the core stack, and UHC drivers, dynamic configuration selection, and limitations in current APIs.
In addition, the session identifies gaps in the current USB host subsystem and outlines potential directions for future evolution. It aims to provide practical insights and guidance for developers working on USB host support in Zephyr.