nitros
Joined 9 years ago
Karma
134
Submissions
35
Member since
Mar 6
Recent submissions
Comment · 1 month ago
The size of the type name isn't correlative, but the nesting depth of types roughly corresponds with how many function bodies are going to be generated. In the GUI library, the HStack/VStack types are type-parameterized by their children, which results in a new copy of the layout function for each combination of children types.
Comment · 1 month ago
A large part of this project was my personal learning. Ultimately I didn't improve the functionality of the device by a large margin; instead I learned a lot about how these devices are built. If I'd let Claude write replacent firmware it would've all been for naught.
Comment · 1 month ago
This is definitely something to be aware of. Installing this firmware definitely invalidates the StVO (though I can always flash the original firmware back). Personally I am morally sound with replacing the firmware of the display unit as the critical functionality is still handled by the motor controller (for example, the brake lever sensors are wired to the motor controller directly, and the display must report the throttle position constantly to not trigger a shutdown); the display unit would need to contain intentionally malicious code to cause problems.
Comment · 1 month ago
With a SWD probe on the cracked open display initially, and this was necessary while I was still writing/porting the peripheral drivers. Once the firmware was stable (and after I'd asserted that it wasn't possible to accidentally brick the scooter) I moved to testing on the real scooter where the only feedback is if things work or not.
Comment · 1 month ago
Yep, this is the case. Nine frames are transmitted with the first frame containing a sequence number and the first five bytes, followed by seven frames containing just data, and a final frame containing the last three bytes of data, and a two byte CRC.
Comment · 1 month ago
Heya, I tried using slint first, but slint needs even more flash, and an allocator on top. Just adding slint (with an empty UI) exhausted my binary size limit.
Comment · 2 months ago
I find I've not read HN as much over the last two years due to this. I think I see one interesting article a day at most now.
Comment · 2 months ago
I've used https://aisler.net/en (based in Aachen) plenty of times. I like their quality and I was able to pull off some stupidly toleranced layouts. (This is as a hobbyist building some one-off circuit boards). I haven't used their assembly service.
Comment · 2 months ago
FYI: Aisler is the PCB manufacturer and assembler (based in Aachen iirc). LibrePCB is CAD software.
Comment · 3 months ago
> But it turns out there's all sorts of delightful data structures that you can only express with unsafe in Rust. Intrusive doubly linked lists are the coolest thing ever.
I don't mean this to be a gotcha, but I think it's important to say that we can have these in rust too! The only difference is that the first thing we have to talk about is you the user can go about using an intrusive collection correctly. I love the cordyceps crate for this. If you want to be able to use your type as a linked list node, you must implement a Linked trait, the documentation of which clearly explains how to use it safely: https://docs.rs/cordyceps/latest/cordyceps/trait.Linked.html
Comment · 4 months ago
I really enjoy using Rel8 (https://rel8.readthedocs.io/), so much so that I reimplemented it in Rust (https://github.com/simmsb/rust-rel8).
For me I find it's an excellent step up from a plain SQL query builder (with an API such as `select(Foo).join(bar)`) as it lets me both effortlessly perform projections (one can write `(\e -> (e.foo, e.bar) <$> someQuery` to take a query producing rows of `E` and turn it into rows of 2-tuples built from two projected fields.
I wrote a bit about my Rust rewrite here: https://bensimms.moe/postgres-lateral-makes-quite-a-good-dsl...
Comment · 6 months ago
This entire paper smells of LLM, I'm sure even the most distinguished academic would refrain from using notation to prove that the SIP status cannot change during operation.
Comment · 7 months ago
I'm suspicious of this prediction given the curl project's experiences...