Embedded Working Group Meeting 2023-01-17

Attendance

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Announcements
- probe-rs 0.14 released
WG
- TYIER
- Social media policy https://github.com/rust-embedded/wg/pull/651
  - Needs updating for Mastodon
Cortex-M
- Mysterious bug in semihosting?
  - https://github.com/rust-embedded/cortex-m/issues/459
  - Seems likely to be a qemu issue, though we could
    possibly work around with a nop in debug::exit,
    which has pretty low overhead since it's only
    used at the end of tests
- c-m-rt zero-init RAM PR https://github.com/rust-embedded/cortex-m/pull/455
Embedded HAL
- PwmPin trait? https://github.com/rust-embedded/embedded-hal/pull/430
  - New suggestion avoids some extra computation
- GPIO ErrorKind https://github.com/rust-embedded/embedded-hal/pull/431#pullrequestreview-1249623337
- embedded-alloc to HAL team?
  - leave with cortex-m for now
Risc-V
- Critical section bug? https://github.com/rust-embedded/riscv/pull/121
  - Yep, merged.

Announcements
- TYIER blog post
- WG social media policy in https://github.com/rust-embedded/wg/pull/651
- svd2rust 0.28.0 released
- aarch64-cpu 9.3.0, 9.3.1 released
Cortex-M
- 0.7.7 released with minor documentation fix for critical-section impl
- c-m-rt zero-init RAM PR updated https://github.com/rust-embedded/cortex-m/pull/455
  - unsure if it should zero before or after pre_init
  - possibly we can skip zeroing bss if all RAM is being zeroed
- embedded-alloc: cortex-m or hal team?
  - leave it for now?
Book
- Atomics discussion https://github.com/rust-embedded/book/issues/338
Embedded HAL
- PwmPin: https://github.com/rust-embedded/embedded-hal/pull/430
  - Keep this design or consider alternative with more methods to get maximum duty value?