rust-embedded/cortex-m

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Low level access to Cortex-M processors

Stars: 1k
Forks: 202
Open beginner issues: 0
Indexed issues: 93
Avg merge: 6d 2h
Merged PRs (30d): 2

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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93 open issues indexed

Enabling LOB Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

rust-embedded/cortex-m#691 · Opened Sep 8, 2026
Warning from linker about alignment of `.text` section Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-embedded/cortex-m#678 · 3 comments · Opened Jul 31, 2026
List of cherry-picks to eventually merge Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

rust-embedded/cortex-m#660 · Opened Apr 28, 2026
Deprecation of `bare-metal` Open

Difficulty 2/5 1-3 hours Newbie friendliness 62/100

rust-embedded/cortex-m#651 · 5 comments · Opened Apr 24, 2026
Make it more obvious that the `inline-asm` feature is deprecated and does nothing Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

rust-embedded/cortex-m#644 · Opened Apr 11, 2026
Update cortex-m-rt on crates.io to include skip-data-copy feature Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

rust-embedded/cortex-m#640 · Opened Apr 7, 2026
Release tracking for cortex-m 0.7.8 and related packages Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

rust-embedded/cortex-m#639 · 6 comments · Opened Mar 31, 2026
minitest-macros needs to be updated to edition 2024 Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

rust-embedded/cortex-m#637 · Opened Mar 29, 2026
CI workflows should have a single job as the pass/fail gate Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

rust-embedded/cortex-m#633 · 1 comment · Opened Mar 24, 2026
The testsuite crate does not build from the root of the repo. Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

rust-embedded/cortex-m#627 · Opened Mar 10, 2026
Update __pre_init docs in cortex-m-rt to suggest use of naked ASM fn Open

Difficulty 1/5 Under an hour Newbie friendliness 48/100

rust-embedded/cortex-m#618 · 3 reactions · Opened Jan 26, 2026
Zero frame pointer register in Reset Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

rust-embedded/cortex-m#617 · 4 comments · Opened Oct 16, 2025
New static mutable storage for the entry function Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-embedded/cortex-m#616 · 3 comments · Opened Oct 9, 2025
cortex-m-rt: consider enabling divide by zero trap by default Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#612 · 5 comments · Opened Oct 2, 2025
Problem with Jumping from Bootloader to Apploader with cortex_m::asm::bootload Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

rust-embedded/cortex-m#607 · 2 comments · Opened Sep 1, 2025
Release new version? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#604 · 21 comments · 4 reactions · Opened Jul 12, 2025
"Thread 'main' panicked" build.rs quit compiling with rp_hal Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-embedded/cortex-m#602 · 6 comments · Opened Jun 26, 2025
Consider using `arm-targets` crate Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-embedded/cortex-m#593 · Opened Apr 16, 2025
Any reason why the `#[exception]` macro disallows `extern "C" fn`s? Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

rust-embedded/cortex-m#575 · 4 comments · Opened Jan 17, 2025
iprintln!(), itm::write_all(), etc not compatible with STM32CubeIDE Serial Wire Viewer (should send on char per u32) Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

rust-embedded/cortex-m#571 · Opened Jan 3, 2025
Vector Implementation Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-embedded/cortex-m#569 · 7 comments · Opened Dec 30, 2024
VECTACTIVE/VECTPENDING are 9 bits. Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-embedded/cortex-m#568 · 1 comment · Opened Nov 25, 2024
`cortex_m::asm::bootload` doesn't mention vector table relocation Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

rust-embedded/cortex-m#559 · 1 reaction · Opened Sep 26, 2024
`cortex_m::singleton` attribute forwarding is unsound in some cases Open

I-unsound

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#538 · 5 comments · Opened Jun 19, 2024
Incorporate DWT Tracing helpers from stm32f4xx-hal? Open

enhancement question

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-embedded/cortex-m#530 · Opened May 15, 2024
Run tests on Arm Virtual Hardware Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-embedded/cortex-m#523 · Opened Apr 3, 2024
`HardFault` trampoline makes it difficult for `probe-rs` debugger to unwind past the exception handler. Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-embedded/cortex-m#514 · 3 comments · Opened Mar 12, 2024
Check that `SYST.set_reload`'s argument is valid Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

rust-embedded/cortex-m#511 · 2 comments · Opened Feb 2, 2024
Delay should sleep the CPU Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#506 · 5 comments · Opened Jan 11, 2024
Incorrect implementation of `cortex_m::peripheral::scb::VectActive::from()` in stable release 0.7.7 Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-embedded/cortex-m#499 · 7 comments · Opened Dec 8, 2023
"Extra Sections" example is potentially unsound Open

I-unsound

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#498 · 4 comments · Opened Nov 26, 2023
Missing `pub` in register bitfields Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-embedded/cortex-m#478 · 1 comment · Opened Jun 2, 2023
Consider adding declarative macros in `cortex-m-rt` Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-embedded/cortex-m#473 · Opened Feb 27, 2023
no code (no .text segment) when forgetting "-C", "link-arg=-Tlink.x" but no warning/error either Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#471 · 2 comments · 1 reaction · Opened Feb 17, 2023
Missing semihosting printouts after upgrade from v0.3.3 to v0.5.0 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#459 · Opened Jan 14, 2023
SCB.ICSR.VECTACTIVE is RES0 on armv8m-baseline w/o halting debug Open

O-Armv8-M

Difficulty 3/5 1-2 days Newbie friendliness 38/100

rust-embedded/cortex-m#456 · Opened Dec 24, 2022
master branch out of date Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-embedded/cortex-m#452 · 4 comments · Opened Oct 18, 2022
Make SYST.has_wrapped() take &self Open

enhancement needs-decision

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-embedded/cortex-m#438 · 1 reaction · Opened May 6, 2022
asm::delay() only blocks half the time intended on an STM32H7 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-embedded/cortex-m#430 · 14 comments · Opened Apr 13, 2022
ITM: `configure` lacks API for stimulus registers Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-embedded/cortex-m#393 · Opened Jan 14, 2022
ITM: `ITMSettings::bus_id` does not check/document permitted values Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-embedded/cortex-m#392 · 1 comment · Opened Jan 12, 2022
TPIU: `LAR` and `FFCR` not part of ARMv7-M standard Open

O-Armv7-M

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-embedded/cortex-m#390 · 4 comments · Opened Jan 11, 2022
TPIU: `set_swo_baud_rate` silently integer divisions, does not verify prescaler Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

rust-embedded/cortex-m#388 · 1 comment · Opened Jan 10, 2022
DWT: address comparison configuration does not verify written mask Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-embedded/cortex-m#384 · 1 comment · Opened Jan 4, 2022
Verify peripheral configuration support inline instead of seperate `has_` functions? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-embedded/cortex-m#382 · 6 comments · 1 reaction · Opened Jan 4, 2022
DWT: differentiate the first comparator Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-embedded/cortex-m#376 · 4 comments · Opened Jan 1, 2022
Consider v0.8-alpha release Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

rust-embedded/cortex-m#368 · 6 comments · Opened Dec 15, 2021
region 'FLASH' already defined Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

rust-embedded/cortex-m#413 · 4 comments · Opened Oct 19, 2021
Make Peripherals::steal() zero cost Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-embedded/cortex-m#356 · 1 comment · 2 reactions · Opened Oct 16, 2021
Convenience function to get all read-only linker sections located in Flash Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

rust-embedded/cortex-m#412 · 1 reaction · Opened Mar 15, 2021

rust-embedded/cortex-m

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