10:32 <phcoder_cat[m]> Hello, all. I try to generate code for Loongson-2E/2F which implement mips3 but not mips32r2. I try -C target-feature=+mips1 -C target-cpu=mips1 and -C target-feature=+mips1,-mips32r2 -C target-cpu=mips1 but rust still emits an "ins" instruction that appeared in mips32r2

11:12 <M9names[m]> mips32 pre r2 is not well supported in LLVM, and mips in general is not well supported by by either LLVM or rust (the rust project dropped tier 2 support due broken codegen and lack of maintainers, see https://github.com/rust-lang/compiler-team/issues/648)

11:16 <agodard> hi, anyone happen to know the state of github.com/rust-embedded/meta-rust-bin? there are hanging PRs there, especially #202 which is quite blocking

11:24 <phcoder_cat[m]> <M9names[m]> "mips32 pre r2 is not well..." <- Do I understand it correctly that it's likely a bug with llvm and that if I want it fixed I have to do it myself?

11:24 <M9names[m]> phcoder_cat[m]: yes on both counts

11:54 <phcoder_cat[m]> More digging revealed that creating custom target json fixes my problem

21:48 <andrewmorrow[m]> Hey all, I have an obvious-seeming question, but can't find good answers searching here or the web. I have an Adafruit Feather nRF52840, and I'd like to try out embassy-nrf as my "RTOS". The [linker scripts in the Adafruit repo](https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/ad218a5e43d440dec7b6a00ed3d9bc36f79721d4/cores/nRF5/linker/nrf52_common.ld) are far more complicated than anything I've seen before, and none of

21:48 <andrewmorrow[m]> the memory regions line up with the examples in the embassy-rs repo. Which linker script should I use? Can I use the factory UF2 bootloader, or do I need to get out the J-Link to use embassy? Thanks!!

21:50 <sajattack[m]1> You can use cargo hf2 if you want

21:50 <sajattack[m]1> Or generate a uf2 file with one of the other uf2 crates

21:50 <sajattack[m]1> There's a couple I think

21:51 <sajattack[m]1> I wrote an initial one but it's not very good

21:53 <andrewmorrow[m]> Looks like I already have cargo-hf2 installed from previous tinkering with Adafruit boards. In that case should I copy the memory regions from [Adafruit's .ld file](https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/cores/nRF5/linker/nrf52840_s140_v6.ld)?

21:53 <andrewmorrow[m]> I don't remember if the UF2 bootloader will protect itself against an attempt to flash an image that would overwrite it

21:54 <sajattack[m]1> bleh yeah that looks messy

21:54 <sajattack[m]1> I think you just add 16K to whatever the address in the nrf52-hal one is

21:56 <andrewmorrow[m]> OK, I'll give it a shot. Worst case I do have a J-Link and the board has a SWD header, so I assume it should be easy-ish to put the factory bootloader back if I mess it up

21:57 <sajattack[m]1> yep

21:58 <sajattack[m]1> I think the bootloader will protect itself against overwriting itself. It's more when you're flashing with jlink you gotta be careful

22:52 <andrewmorrow[m]> sadly cargo-hf2 does not work with newer Adafruit stuff apparently https://github.com/jacobrosenthal/hf2-rs/issues/41

22:52 <andrewmorrow[m]> time for the J-link to come out and play :D

23:04 <jason-kairos[m]> Is there a rust equivalent to the lwip TCP stack?

23:05 <jason-kairos[m]> I thought that maybe I read an article about a rust network stack a couple of months ago. No clue if it was anything suitable for a microcontroller.

23:20 <dirbaio[m]> smoltcp, embassy-net