Linux and Zephyr “Talking” to Each Other in the Same SoC
summary
Hybrid i.MX7 system runs Linux on Cortex‑A7 and Zephyr on Cortex‑M4 using shared memory and the NXP Messaging Unit; RPMsg on Linux exposes channels as TTY-over-RPMsg, while a forked RPMsg‑lite on Zephyr uses an IPM-based MU driver on i.MX7. Demo is a working proof‑of‑concept that boots both images (Zephyr in TCM ~15 KB RAM, ~21 KB flash), echoes messages back, and highlights missing mainline pieces (remoteproc resource table handling, VIRTIO init, MU/RPMsg drivers).
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chapters (13)
- 0:00Intro
- 0:34Agenda
- 1:56Preamble
- 4:32Real-Time applications with HMP
- 9:32OpenAMP Introduction
- 14:13RPMsg Introduction
- 20:07RPMsg-lite Introduction
- 22:21Enabling RPMsg on Linux
- 25:00Enabling RPMsg-lite on Zephyr
- 29:10Linux and Zephyr communication setup
- 30:35Demo
- 38:02Future Work
- 39:22References
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