Why the Zephyr Project Uses Vendor HALs
The use of vendor-supplied HALs (Hardware Abstraction Layers) in open source projects has been a source of ongoing discussion. At the October ELC Europe conference in Prague, we took up the topic again.
In “Using SoC Vendor HALs in the Zephyr Project,” Zephyr Project contributor Maureen Helm, an MCU Software Architect at NXP, discussed the pros and cons of using vendor HALs. Ultimately, she argued that that the benefits far outweigh the tradeoffs. This viewpoint was expanded upon in a recent Zephyr Project blog post by Helm and Frank Ohlhorst.
The main reason for using vendor-supplied HALs is to reduce coding and testing time. The Zephyr Project maintains and develops the lightweight Zephyr OS for microcontroller units (MCUs), the number and variety of which have soared in recent years.
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