Building a Zephyr-Native Audio Framework With Sound Open Firmware
summary
Claim: replace the Linux host with a Cortex-M running Zephyr so Sound Open Firmware (SOF) runs on microcontrollers. Implementation uses SOF 2.0 on Zephyr, three IPC options evaluated (raw messaging unit with shared memory, RPMsg, Zephyr IPC service), and a proof-of-concept on an NXP RT600 (Cortex‑M33 host) driving a Hi‑Fi4 DSP. The POC uses Zephyr-native SOF host, raw messaging unit + shared memory, and a static C pipeline and successfully streams static PCM through SOF.
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chapters (14)
- 0:00Introduction
- 1:01What is Sound Open Firmware
- 3:11SOF’s Linux limits
- 6:20SOF’s Zephyr modularity
- 8:31Problem: SOF’s Linux dependency
- 9:37Proposal: Zephyr for MCUs
- 10:41Zephyr SOF host details
- 11:45IPC mechanisms
- 14:00Topology and pipeline
- 15:06Audio playback flow
- 16:14Proof of concept on RT600
- 17:38Future work
- 18:43Key conclusions
- 20:07Q&A
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