01:16 <re_irc> <pgibson> Is there a preferred way to access a "[u32; 12]" bytewise, eg for i2c transmission? I'm currently allocating a "[0u8; 12*4]" and then copying to/from it using to/from_be_bytes which works but feels clumsy. I've seen "std::mem::transmute" which I expect is unavailable in no_std, and I'm currently looking at "unsafe {data.align_to::<u8>()}" and how to swap endianness

01:17 <re_irc> <pgibson> Some of the structures are probably much larger than u32; 12 really

01:22 <re_irc> < (@9names:matrix.org)> transmute is also in core::mem

01:22 <re_irc> < (@9names:matrix.org)> so you can still use that with no_std

01:24 <re_irc> <pgibson> Is there any advantage to transmute vs align_to?

01:26 <re_irc> < (@9names:matrix.org)> I'm not familiar with align_to

01:27 <re_irc> < (@9names:matrix.org)> Depending on how much you're doing this you might want something like the bytemuck crate

01:29 <re_irc> <pgibson> Yeah that does look interesting thanks

01:45 <re_irc> < (@grantm11235:matrix.org)> Fun fact: "RangeInclusive" is 50% larger than "Range"

01:46 <re_irc> < (@grantm11235:matrix.org)> Due to and extra bool plus alignment padding https://doc.rust-lang.org/src/core/ops/range.rs.html#341-357

01:52 <re_irc> < (@grantm11235:matrix.org)> * an

03:21 <re_irc> < (@Ericson2314:matrix.org)> anyone have any idea with thumb1 how to load a 32-bit immediate that is a (defined elsewhere) symbol?

03:21 <re_irc> < (@Ericson2314:matrix.org)> I see newer arm has ":lower16:"

03:21 <re_irc> < (@Ericson2314:matrix.org)> but I don't see anything for each 8 bytes

03:49 <re_irc> < (@Ericson2314:matrix.org)> I guess ldr is the move

03:49 <re_irc> < (@Ericson2314:matrix.org)> or defining symbols in linker script but that sucks

03:50 <re_irc> < (@Ericson2314:matrix.org)> (1 for each 8 bits)

21:10 <re_irc> < (@dirbaio:matrix.org)> with vscode+rust-analyzer, "format on save" has recently stopped working for files not in the main crate

21:10 <re_irc> < (@dirbaio:matrix.org)> has anyone else seen this? any fixes?

21:20 <re_irc> < (@jessebraham:matrix.org)> I _may_ have seen that happen yesterday, but I'm not entirely sure. I chalked it up to the usual RA weirdness though.

21:20 <re_irc> < (@jessebraham:matrix.org)> Not working today but I can try to check it out later

21:21 <re_irc> < (@jessebraham:matrix.org)> * I'm not

21:39 <re_irc> < (@dirbaio:matrix.org)> lol it fails to format as soon as the file contains one "async fn"

22:16 <re_irc> < (@9names:matrix.org)> i would simply not write one async fn 🤪

22:43 <re_irc> < (@robgal519:matrix.org)> Hi I have issue with defmt-rtt, I just wanted to have some println! statement in my sample (stm32f103), but I keep getting linker errors:

22:43 <re_irc> rust-lld: error: undefined symbol: _critical_section_1_0_acquire

22:43 <re_irc> error: section .defmt.{"package":"blinky","tag":"defmt_println","data":"main","disambiguator":"8589678049887836088"} virtual address range overlaps with .text

22:43 <re_irc> my dependencies in Cargo.toml:

22:43 <re_irc> ... long message truncated: https://psion.agg.io/_matrix/media/r0/download/psion.agg.io/lwZIpGQiShJ0taiCzD1cJZvgMK7toVJ7 (42 lines)

22:43 <re_irc> < (@robgal519:matrix.org)> what am I missing ?

22:43 <re_irc> < (@dirbaio:matrix.org)> enable Cargo feature "critical-section-single-core" in "cortex-m"

22:44 <re_irc> < (@robgal519:matrix.org)> Hi I have issue with defmt-rtt, I just wanted to have some println! statement in my sample (stm32f103), but I keep getting linker errors:

22:44 <re_irc> rust-lld: error: undefined symbol: \_critical\_section\_1\_0\_acquire

22:44 <re_irc> error: section .defmt.{"package":"blinky","tag":"defmt\_println","data":"main","disambiguator":"8589678049887836088"} virtual address range overlaps with .text

22:44 <re_irc> ... long message truncated: https://psion.agg.io/_matrix/media/r0/download/psion.agg.io/CVeqkiPHMkAHMQ4lTxDYKFc4xRdFXl47 (42 lines)

22:44 <re_irc> my dependencies in Cargo.toml:

22:49 <re_irc> cortex-m = {version = "0.7.6", features = ["critical-section-single-core"] }

22:49 <re_irc> < (@robgal519:matrix.org)> I edited Cargo.toml:

22:49 <re_irc> now I only have one linker undefined symbol:

22:49 <re_irc> I removed target directory and hit cargo build.

22:49 <re_irc> ... long message truncated: https://psion.agg.io/_matrix/media/r0/download/psion.agg.io/q02HSohZGogREgKC2lYysnssu17jdq7V (6 lines)

23:01 <re_irc> < (@robgal519:matrix.org)> I was able to use rtt_target, and got some output on RTT, but it is not defmt, that I wanted :( ( I want a printf and logging done by defmt, and in case of rtt_target all strings are embedded in the binary)

23:03 <re_irc> < (@dirbaio:matrix.org)> make sure you have "-Tdefmt.x" in your linker options (usually in ".cargo/config.toml")

23:05 <re_irc> < (@robgal519:matrix.org)> my config:

23:05 <re_irc> target = "thumbv7m-none-eabi"

23:05 <re_irc> [build]

23:05 <re_irc> ... long message truncated: https://psion.agg.io/_matrix/media/r0/download/psion.agg.io/oa6VnOuQD0eb2V34eH7yp3CmrWdvQiOw (9 lines)

23:05 <re_irc> # Always compile for the instruction set of the STM32F1

23:05 <re_irc> < (@dirbaio:matrix.org)> https://github.com/knurling-rs/app-template/blob/main/.cargo/config.toml#L6-L7

23:07 <re_irc> < (@robgal519:matrix.org)> : you are great ! It works perfectly now !