Meeting 2026-06-16

[adamgreig]

This is the agenda for the next meeting. Please add anything you'd like to discuss below!

• Meetings: Tuesday 8pm Europe/Berlin time
• Join the Matrix chat
• IRC/Matrix logs

The REWG Code of Conduct applies.

[thejpster]

https://github.com/rust-embedded/aarch32/pulls has three PRs open which are ready for review.

I could also do with some helping thinking up exotic repr(C) types we can throw between Rust and C and back again, to check out our EABI support (rust-embedded/aarch32#176).

Maybe cortex-m could do with some EABI tests too.

[thejpster]

where are we at with the cortex-m release?

[thejpster]

to note: rust t-opsem are thinking about volatile atomics - i.e. volatile writes that also matter in terms of ordering with non-volatile writes. Like kicking off a DMA transfer (which you really shouldn't do until all the data you want to DMA has actually hit RAM).

[thejpster]

https://github.com/rust-embedded/arm-dcc/pull has one new PR (adding ARM7TDMI/ARM9EJ-S support)

[thejpster]

to note: Knurling defmt and derive-mmio are dropping proc-macro-error2, which is unmaintained and now has a RUSTSEC advisory on it for that reason. We're now just converting errors into tokens by hand by using syn::Error. I'd advise others to do the same.

[jannic]

Triage

• Still open from last week:
  Cancellation safety of Read::read and Write::write in embedded-io-async embedded-hal#719
  (About cancellation safety of read/write in embedded-io-async)

• Backport SPSC fixes to 0.8 branch heapless#655
  Open since April, just a backport, approved. Shouldn't
  this be merged by now?