Embedded Working Group Meeting 2022-11-22

Attendance

Write your GH username or Matrix handle here!

Announcements
Is anyone interested in helping run a rust-embedded Mastodon account?
- Yep, https://github.com/rust-embedded/wg/issues/647 opened to track progress
Yank critical-section 0.2?
- Only 4 crates on crates.io still using it exclusively
  - https://crates.io/crates/alkyn
  - https://crates.io/crates/defmt-serial
  - https://crates.io/crates/web-embedded-hal
  - https://crates.io/crates/critical-once-cell
  - rp2040-hal and everything depending on it… https://github.com/rp-rs/rp-hal/blob/main/rp2040-hal/Cargo.toml#L32-L34 – rp2040-hal uses both ~~(in a way that guarantees that nobody accidentally uses the old version)~~ but prevents yanking the old version :)
- Open issue/PR on those 4 crates, wait for rp2040-hal release without it, wait a month and then yank.

Announcements
- cortex-m-rt 0.7.2 released
  - MSRV bumped to use new stable asm, no more precompiled blobs
  - Adds set-vtor and set-sp features
- riscv 0.10 released with critical-section impl
- a few new async crates using e-h-a and e-n-a (and new crates released from embassy):
  - reqwless 0.2 - async http client
  - esp8266-at-driver
  - es-wifi-driver
  - rak811-at-driver
  - hts221-async
Async interrupt registration, take 3 (only in HAL approach)
- The other end of the spectrum, no crate needed only a simple macro-by-example in a HAL + marker trait. When HALs are not forced to adhere to an API via a crate (eg cortex-m-interrupt), will it be enough with the simpler solution that needs to be disiminated in a different way?
Newsletter: looking for volunteers
Maybe run another last-friday-of-the-month Twitter project roundup?
Discussed structure of driver crates offering both blocking and async drivers