Embedded Working Group Meeting 2023-06-27

Attendance

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Announcements
* smoltcp 0.10 released
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Bors
- Swapped a-e-r, e-h, discovery, embedded-alloc thanks to @eldruin
Book translations
- https://github.com/rust-embedded/book/issues/326#issuecomment-1580987514
- No updates this week
- @eldruin / @romancardenas possibly to work on a spanish translation
Cortex-M
- Hardfault trampoline https://github.com/rust-embedded/cortex-m/pull/476
  - almost ready to merge
svd2rust
- per-peripheral steal() https://github.com/rust-embedded/svd2rust/pull/723
  - ready to merge?
embedded-hal
- spi::operation::delayus now merged
- what's left?
  - transition guide
  - validating traits in hals and drivers
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  is it finally 1.0 time?? (JP)
atomic-polyfill: force feature

Announcements
- Rust leadership RFC merged, leadership council now exists
  - https://blog.rust-lang.org/2023/06/20/introducing-leadership-council.html
Bors
- Started not responding, so accelerating change to GHMQ
Book translations
- https://github.com/rust-embedded/book/issues/326#issuecomment-1580987514
- No updates this week
Cortex-M
- Hardfault trampline
  - https://github.com/rust-embedded/cortex-m/pull/476
  - Test issue resolved, tests to be added then ready to merge
svd2rust
- per-peripheral steal() https://github.com/rust-embedded/svd2rust/pull/723
- global steal() not setting flag https://github.com/rust-embedded/svd2rust/pull/735
- Conclusion so far:
  - Peripherals::steal() sets DEVICE_PERIPHERALS so that frameworks like RTIC can use steal() when they want to avoid the unwrap associated with take() (as they know they are running before user code so take wouldn't fail) but still set the flag so that user code cannot later take() and end up with duplicate peripherals
  - This wasn't a documented safety contract…
  - Still, it seems work keeping for backwards compatibility with RTIC
  - However, new per-peripheral steal() does not need to honour this; instead its safety invariants can be documented (e.g. ensure having stolen that no one else will be using it at the same time)
  - So in conclusion, close 735 without merging, but merge 723 with associated function steal per-peripheral
embedded-hal
- Swapping to GHMQ and then ready to merge spi::operation