"inline(always) functions containing assembly only catch asm errors if used" is a fun fact to remember

When device-driver starts generating C code, which version of C should it be? Well, it's not gonna C89 lol! (Alt in thread)

The sun is shining and it's cold in my house, so you know what that means! Free heating with my aircon :D

I have to say: the Rust reference has really improved over the years! It's very easy to find the weird little things you're sometimes looking for

Do any of the Rust folks out there know of any Rust issues for "async fns increase *code size* nonlinearly"? github.com/rust-lang/ru... is an example for *memory usage*, but I have some (embedded) customers that are seeing things like reducing a few await points can shave off *kilobytes* of code sz

If anyone wants to experiment with this for `postcard-schema`, I would be incredibly interested. `postcard-schema` is largely a proc macro that I don't love, because it's just manual reflection. I'm VERY excited to see motion here, and very happy for @fasterthanli.me's push and Oli's work!

Oh this looks cool! And it looks very usable. Also this MVP implementation looks surprisingly small :D

Wait, so Tylenol is just a brand name for paracetamol? They really want to ban paracetamol in the US? Huh... I thought maybe Tylenol would be something weird and they would at least have *some* reason to ban it

Does anyone have a cool robotics arm kit, or similar kind of hardware available, that DOESN'T come with the control hardware tightly integrated? I want to build a cool demo for ergot, with a couple of MCUs running the show, but don't have the MechE chops to design the core bits.

Dutch late night TV has its take

Cool! Happy with the playground result. Love how instant compilation is :D I've probably committed crimes against the web with my HTML/CSS skills, but it works :) diondokter.github.io/device-drive... The home page is super mega WIP, but that wait can until other more important stuff is done.

Want to use @ratatui.rs in other languages? The FFI just dropped 🔥 ➡️ ratatui-ffi — Native C ABI bindings for Ratatui. 📦 Shipped as a tiny cdylib you can call from C, C#, Go, Python, TypeScript, & more. ⭐ GitHub: github.com/holo-q/ratat... #rustlang #ratatui #tui #ffi #language #bindings #python

Oh sweet! `cargo publish --workspace` is a thing now in Rust 1.90. blog.rust-lang.org/2025/09/18/R...

Ooh, it's been a while, but I got my butt kicked by the borrow checker. But after 20 mins I figured it out :P

Ferrocene 25.08 will include a SIL 2 safety certified subset of libcore. www.linkedin.com/posts/ferrou...

Pssst... Hey... Hey you... Would you like to see a preview of the device-driver playground? diondokter.github.io/device-drive...

Oh, apparently ST has made some embedded Rust drivers! github.com/STMicroelect... But they made the same mistake I tweeted here: github.com/STMicroelect...

Occassionally folks reach out to me to ask "how do I hire embedded rust folks for contract/full time work?", and this is generally the answer I give folks: gist.github.com/jamesmunns/c... Feel free to share/etc., I'm all about more folks finding good full time gigs in embedded rust :)

If you're using embassy, this might be a fun read!

This was surprisingly easy to get running! Seems like I can make a device-driver playground pretty easily and serve it as a static website. Too bad my website-making skills are subpar. But, hopefully that won't get in the way too much :P

Ha, more proof that memory ordering is hard! github.com/STMicroelect... Spoiler: This should be called bit order and the choice is between Lsb0 and Msb0. Endianness is about the order of bytes in a word. Tricky, so that's why I wrote this for device-driver: diondokter.github.io/device-drive...

We received reports of a phishing campaign targeting crates​.io users. Do not click on links asking to authenticate to protect your account. More information: blog.rust-lang.org/2025/09/12/c...

Blog post by Folkert: How can we make Rust programs that use state machines even faster? Trifecta Tech aims to create safe and robust infrastructure software, that's why we're dedicated to making Rust the go-to for performance-critical components like zlib&zstd. trifectatech.org/blog/improvi...

I'm a bit I'll today. How do I know? I typed 'cargo reset --hard origin/foo' in my terminal today. I laughed it off and corrected myself. I then wanted to check if I was fully up to date and so I typed 'cargo fetch'... Yeah...

** Ticket sales now open ** Get your Early Bird tickets for RustWeek 2026! The world's biggest Rust conference returns to beautiful Utrecht, welcoming over 900+ community members, professionals and the maintainers of Rust. 2026.rustweek.org #rustweek2026 #rust

Interesting! Seems to line up with other numbers. A personal 'problem' of mine is sometimes I'm too lazy to really use my brain to solve something and think deeply.

will I see you at rustweek 2026??? get your tix now: 2026.rustweek.org

Whatever you do, avoid the Texas Instruments BQ35100 like the plague. Terrible datasheet Terrible manual Three or four different ways you need to use I2C to access data Big and little endian mixed in weird ways Requires massive different delays between ops or it silently fails

TIL of three clippy lints I haven't used before, but look super useful for embedded: * large_futures * large_stack_frames * large_types_passed_by_value rust-lang.github.io/rust-clippy/... All of them have default config values too big for embedded (but can be changed!), it's very cool they exist!

Is there a proposal for getting select(_biased) and join into std/core? I'm tired of importing a library to do these fundamental things

Oh cool! This uses the device-driver crate for the touch chip :D It's cool for other reasons too, but, you know ;)

Status update: we've restored the 55TB snapshot and subsequent incremental backups, and are about to replay the remaining traffic since the backup. There are still several unknowns, but if things go well the matrix.org instance should be back in 3-4 hours.

RIP matrix. If my messages eventually get sent, I hope they still make sense 😇

You know me for my public #rustlang work, but I'm also freelancing as a programmer and consultant. I'm looking for a new customer and I'd welcome short or part-time missions. RT appreciated. dystroy.org

Ok, so I photoshopped this with a change of flag, a change of famous national leader and translated the text, but it's quite a bit too on the nose

This is a real photograph of Washington, DC this week, where the United States president has ordered military occupation in peacetime, and ordered the display of colossal portraits of himself. www.wsj.com/politics/pol...

Good, seems like they haven't lost all their senses after all

Props to the Embassy folks (mostly @dirbaio.bsky.social & @lulf.no) for doing a massive 27 crate release today! Embassy is so nice and it's also great to contribute to

Nice blogpost about productivity with Rust: lubeno.dev/blog/rusts-p...

If only `byte_range` (github.com/rust-lang/ru...) & proc macro diagnostics (github.com/rust-lang/ru...) were stable... Now I'm just shoving it behind a nightly flag and hope for the best! For the diagnostics, I would also need the ability to create a span from a byte range...

Love it!

Small set-back for device-driver... I wanted to have the old inputs and the new KDL live together in at least one version. But due to data modelling differences, that would take a vast amount of work and hacks to achieve. So, the next breaking version might come sooner than I hoped.

This is one of the better succinct summaries of Rust's value prop, and I really like the phrasing of "Rust exposes impedence mismatches": it feels annoying to some people, but often you WANT to be able to "see" these awkward steps, because it matters. news.ycombinator.com/item?id=4497...

New heapless version is out! blog.rust-embedded.org/heapless-091 (And it's looking juicy)

Zed for Windows: What’s taking so long?! From rendering to crash reporting, we’ve been heads down fixing the tricky parts. Here’s what we’ve been up to → zed.dev/blog/windows...

My nemesis

I'm probably going to post this a couple times, but if you are a Rust dev, who cares about messaging between tasks/threads/process/devices, and would be willing to do me a personal solid, I want YOU to help me put Ergot through its paces: github.com/jamesmunns/e... I need your help!

i’ve never been so owned in my life

Alright, little device-driver update: I merged basic KDL input support. There's still a lot that needs to happen, but things are looking good! Very excited to continue :D So many things in the issue tracker too: github.com/diondokter/d...

Gunna chat about this a bit here, and show a bit what it looks like to do this kind of profiling, come say hey and hang out! youtube.com/live/GvJHSxD...