Embedded Working Group Meeting 2023-02-28

• Coordination Repository
• Meetings: Tuesday 8pm Europe/Berlin time
• Join the Chat
• Today's date: 2023-02-28
• Nominated issues
• IRC logs

Attendance

Write your GH username or Matrix handle here!

• adamgreig
• newAM
• cr1901
• therealprof
• lulf
• dirbaio
• jannic
• chrysn (with interruptions)

Agenda

• Announcements
• ESP roadmap https://mabez.dev/blog/posts/esp-rust-24-02-2023/
• Cortex M
  • Declarative macros for c-m-rt?
    • https://github.com/rust-embedded/cortex-m/issues/473
    • Not clear the advantages are compelling enough to maintain a whole second set of macros or a second crate
    • Could document the API names used to allow stable unsafe use without macros
    • Could possibly rework the macros without syn/quote, but might require breaking change of removing the static mut support
• Embedded HAL
  • nb with defmt
    • https://github.com/rust-embedded/nb/pull/39
    • happy to merge and release 1.1?
    • set feature to enable dep:defmt to avoid making a defmt feature, which also requires an msrv bump
  • PWM SetDuty https://github.com/rust-embedded/embedded-hal/pull/430
    • rename trait to SetDutyCycle, and functions similarly
    • otherwise good to merge
  • delay: make infallible https://github.com/rust-embedded/embedded-hal/pull/432
    • Yep
  • gpio: add ErrorKind https://github.com/rust-embedded/embedded-hal/pull/431
  • close https://github.com/rust-embedded/embedded-hal/pull/433 ?
    • Yep

Last Week's Minutes

• Announcements
• Resources
  • Showcase build fixed
  • @eldruin working on new website draft
  • What happened to "This Year in Rust 2022"?
• Embedded HAL
  • PWM pin: NonZero?
    • https://github.com/rust-embedded/embedded-hal/pull/430
    • https://godbolt.org/z/xx9vTjTTn
    • No consensus yet, NonZero removes a possible panic but makes the ergonomics worse
  • defmt dependency for nb?
    • https://github.com/rust-embedded/nb/pull/39
    • Seems like we can add a feature gate for this OK