Embedded Working Group Meeting 2023-11-07

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• Meetings: Tuesday 8pm Europe/Berlin time
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• Today's date: 2023-11-07
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Attendance

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• adamgreig
• mabez
• jessebraham
• jannic
• therealprof
• johngigantic
• newAM
• greengenie

Agenda

• Announcements
  • embedded-alloc 0.5.1 released
• RustNL embedded impl days
• Rust target maintenance
  • Waiting for feedback on PR
• Cortex-M __reset_vector symbol https://github.com/rust-embedded/cortex-m/issues/495
• Cortex-m-interrupt-number
  • https://github.com/rust-embedded/cortex-m/pull/488
  • Should the crate be called cortex-m-pac-interface or similar,
    and use the crate as a place to document the other requirements
    on PACs?
• Mutex trait
  • Resources team to open RFC to deprecate and archive
• Heapless 0.8 release
• book: tooling page needs updating
  • Discussed updating to use probe-rs, and possibly also adding some examples of the nice things we can have these days in embedded Rust
• bors: ops docs needs updating

Last Week's Minutes

• Announcements
• Anti-spam bot
  • No issues so far, so let's say no longer provisional and will just deal with anything as it occurs
• Rust target maintainers
  • PR submitted, no response yet
  • https://github.com/davidtwco/rust/pull/1
• cortex-m-interrupt-number
  • https://github.com/rust-embedded/cortex-m/pull/488
  • Haven't yet checked if this is non-breaking but still expect so
  • Plan for moving PACs off of c-m-rt too?
    • the main issue is the interrupt macro, which currently the PAC re-exports along with an alias to its own interrupt enum
    • proposal is for users to directly use #interrupt(pac::Interrupt) from c-m-rt instead
    • conceivably we could require PACs have Interrupt at the top level, so the macro only needs a reference to the PAC itself
    • some discussion about possible syntax for the interrupt macro
    • perhaps c-m-i-n should be called something else, like c-m-pac-interface or c-m-pac or c-m-interrupts or…?
      • we can use this crate to document the entire expected interface for a cortex-m PAC, so it can be relied on by cortex-m, cortex-m-rt, RTIC, etc, and implemented by svd2rust, chiptool, raltool, etc
• mutex trait
  • https://github.com/rust-embedded/mutex-trait/issues/13
  • open an RFC to deprecate and archive mutex-trait
• embedded-alloc
  • new release? https://github.com/rust-embedded/embedded-alloc/pull/81
• heapless 0.8 release
  • more or less ready, remaining PRs could be 0.8.1 as not breaking
• svd2rust: Vector should be repr© https://github.com/rust-embedded/svd2rust/issues/755
• book: tooling page needs updating
• bors: ops docs needs updating