├── .github ├── CODEOWNERS ├── bors.toml └── workflows │ ├── ci.yml │ ├── clippy.yml │ └── rustfmt.yml ├── .gitignore ├── CHANGELOG.md ├── CODE_OF_CONDUCT.md ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md ├── src └── lib.rs └── triagebot.toml /.github/CODEOWNERS: -------------------------------------------------------------------------------- 1 | * rust-embedded/cortex-a rust-embedded/cortex-m rust-embedded/cortex-r rust-embedded/msp430 rust-embedded/riscv 2 | -------------------------------------------------------------------------------- /.github/bors.toml: -------------------------------------------------------------------------------- 1 | block_labels = ["needs-decision"] 2 | delete_merged_branches = true 3 | required_approvals = 1 4 | status = [ 5 | "ci (stable, ubuntu-latest)", 6 | "ci (stable, macOS-latest)", 7 | "ci (stable, windows-latest)", 8 | "ci (1.54.0, ubuntu-latest)", 9 | "rustfmt", 10 | "clippy", 11 | ] 12 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | on: 2 | push: 3 | branches: [ staging, trying, master ] 4 | pull_request: 5 | 6 | name: CI 7 | 8 | env: 9 | # Cross-build targets for CI. For each target architecture, this should include the lowest common 10 | # denominator that is still a tier 2 target. 11 | TARGETS: > 12 | thumbv6m-none-eabi 13 | armv7a-none-eabi 14 | armv7r-none-eabi 15 | aarch64-unknown-none 16 | riscv32i-unknown-none-elf 17 | 18 | jobs: 19 | ci: 20 | runs-on: ${{ matrix.os }} 21 | continue-on-error: ${{ matrix.experimental || false }} 22 | strategy: 23 | matrix: 24 | # All code should be running on stable now 25 | rust: [stable] 26 | os: [ubuntu-latest, macOS-latest, windows-latest] 27 | 28 | include: 29 | # Test MSRV 30 | - rust: 1.54.0 31 | os: ubuntu-latest 32 | 33 | # Test nightly but don't fail 34 | - rust: nightly 35 | os: ubuntu-latest 36 | experimental: true 37 | steps: 38 | - uses: actions/checkout@v2 39 | - uses: actions-rs/toolchain@v1 40 | with: 41 | profile: minimal 42 | toolchain: ${{ matrix.rust }} 43 | override: true 44 | - name: Install targets 45 | shell: bash 46 | run: rustup target add $TARGETS 47 | if: matrix.rust == 'stable' 48 | - name: Run tests 49 | run: cargo test --all 50 | - name: Cross-compile 51 | if: matrix.rust == 'stable' 52 | shell: bash 53 | run: > 54 | for target in $TARGETS; do 55 | cargo build --target=$target 56 | done 57 | -------------------------------------------------------------------------------- /.github/workflows/clippy.yml: -------------------------------------------------------------------------------- 1 | on: 2 | push: 3 | branches: [ staging, trying, master ] 4 | pull_request_target: 5 | 6 | name: Clippy check 7 | jobs: 8 | clippy: 9 | runs-on: ubuntu-latest 10 | steps: 11 | - uses: actions/checkout@v2 12 | if: github.event_name == 'pull_request_target' 13 | with: 14 | ref: refs/pull/${{ github.event.number }}/head 15 | - uses: actions/checkout@v2 16 | if: github.event_name != 'pull_request_target' 17 | - uses: actions-rs/toolchain@v1 18 | with: 19 | profile: minimal 20 | toolchain: stable 21 | override: true 22 | components: clippy 23 | - uses: actions-rs/clippy-check@v1 24 | with: 25 | token: ${{ secrets.GITHUB_TOKEN }} 26 | -------------------------------------------------------------------------------- /.github/workflows/rustfmt.yml: -------------------------------------------------------------------------------- 1 | on: 2 | push: 3 | branches: [ staging, trying, master ] 4 | pull_request: 5 | 6 | name: Code formatting check 7 | 8 | jobs: 9 | fmt: 10 | name: rustfmt 11 | runs-on: ubuntu-latest 12 | steps: 13 | - uses: actions/checkout@v2 14 | - uses: actions-rs/toolchain@v1 15 | with: 16 | profile: minimal 17 | toolchain: stable 18 | override: true 19 | components: rustfmt 20 | - uses: actions-rs/cargo@v1 21 | with: 22 | command: fmt 23 | args: --all -- --check 24 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /target/ 2 | **/*.rs.bk 3 | Cargo.lock 4 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Change Log 2 | 3 | All notable changes to this project will be documented in this file. 4 | This project adheres to [Semantic Versioning](http://semver.org/). 5 | 6 | ## [Unreleased] 7 | 8 | - Added inherent `impl` block for `Mutex>` to help reduce verbosity 9 | - Increased MSRV to 1.50.0 10 | 11 | ## [v1.0.0] - 2020-06-23 12 | 13 | ### Breaking Changes 14 | 15 | - Use `CriticalSection<'cs>` everywhere instead of `&'cs CriticalSection` 16 | (this makes it a zero-sized type). 17 | - Removed the `const-fn` feature. 18 | - Removed the `Peripheral` wrapper type. 19 | - Removed the `Nr` trait in favor of architecture-specific traits in downstream crates. 20 | 21 | ## [v0.2.5] - 2019-08-29 22 | 23 | ### Changed 24 | 25 | - The `const-fn` feature is now stable. 26 | 27 | ## [v0.2.4] - 2018-10-30 28 | 29 | ### Added 30 | 31 | - Note in the documentation that `Mutex` is not memory safe in multi-core systems. 32 | 33 | ### Changed 34 | 35 | - The `const-fn` feature can now be used on 1.31-beta and will also work on stable 1.31. 36 | 37 | ## [v0.2.3] - 2018-08-17 38 | 39 | ### Fixed 40 | 41 | - A compilation error when using a recent nightly while the "const-fn" feature was enabled. 42 | 43 | ## [v0.2.2] - 2018-08-17 - YANKED 44 | 45 | ### Fixed 46 | 47 | - A compilation error when using a recent nightly while the "const-fn" feature was enabled. 48 | 49 | ## [v0.2.1] - 2018-08-03 50 | 51 | ### Fixed 52 | 53 | - Soundness issue where it was possible to borrow the contents of a Mutex for longer than the 54 | lifetime of the Mutex. 55 | 56 | ## [v0.2.0] - 2018-05-10 - YANKED 57 | 58 | YANKED due to a soundness issue: see v0.2.1 for details 59 | 60 | ### Changed 61 | 62 | - [breaking-change] `const-fn` is no longer a default feature (i.e. a feature that's enabled by 63 | default). The consequence is that this crate now compiles on 1.27 (beta) by default, and opting 64 | into `const-fn` requires nightly. 65 | 66 | ## [v0.1.2] - 2018-04-24 67 | 68 | ### Added 69 | 70 | - An opt-out "const-fn" Cargo feature. When this feature is disabled this crate compiles on stable. 71 | 72 | ## [v0.1.1] - 2017-09-19 73 | 74 | ### Fixed 75 | 76 | - Added feature gate to make this work on recent nightlies 77 | 78 | ## v0.1.0 - 2017-07-06 79 | 80 | - Initial release 81 | 82 | [Unreleased]: https://github.com/japaric/bare-metal/compare/v1.0.0...HEAD 83 | [v1.0.0]: https://github.com/japaric/bare-metal/compare/v0.2.5...v1.0.0 84 | [v0.2.5]: https://github.com/japaric/bare-metal/compare/v0.2.4...v0.2.5 85 | [v0.2.4]: https://github.com/japaric/bare-metal/compare/v0.2.3...v0.2.4 86 | [v0.2.3]: https://github.com/japaric/bare-metal/compare/v0.2.2...v0.2.3 87 | [v0.2.2]: https://github.com/japaric/bare-metal/compare/v0.2.1...v0.2.2 88 | [v0.2.1]: https://github.com/japaric/bare-metal/compare/v0.2.0...v0.2.1 89 | [v0.2.0]: https://github.com/japaric/bare-metal/compare/v0.1.2...v0.2.0 90 | [v0.1.2]: https://github.com/japaric/bare-metal/compare/v0.1.1...v0.1.2 91 | [v0.1.1]: https://github.com/japaric/bare-metal/compare/v0.1.0...v0.1.1 92 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | # The Rust Code of Conduct 2 | 3 | ## Conduct 4 | 5 | **Contact**: [Embedded WG][wg] 6 | 7 | * We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, nationality, or other similar characteristic. 8 | * On Matrix and IRC, please avoid using overtly sexual nicknames or other nicknames that might detract from a friendly, safe and welcoming environment for all. 9 | * Please be kind and courteous. There's no need to be mean or rude. 10 | * Respect that people have differences of opinion and that every design or implementation choice carries a trade-off and numerous costs. There is seldom a right answer. 11 | * Please keep unstructured critique to a minimum. If you have solid ideas you want to experiment with, make a fork and see how it works. 12 | * We will exclude you from interaction if you insult, demean or harass anyone. That is not welcome behavior. We interpret the term "harassment" as including the definition in the [Citizen Code of Conduct](http://citizencodeofconduct.org/); if you have any lack of clarity about what might be included in that concept, please read their definition. In particular, we don't tolerate behavior that excludes people in socially marginalized groups. 13 | * Private harassment is also unacceptable. No matter who you are, if you feel you have been or are being harassed or made uncomfortable by a community member, please contact one of the channel ops or any of the [Embedded WG][wg] immediately. Whether you're a regular contributor or a newcomer, we care about making this community a safe place for you and we've got your back. 14 | * Likewise any spamming, trolling, flaming, baiting or other attention-stealing behavior is not welcome. 15 | 16 | ## Moderation 17 | 18 | These are the policies for upholding our community's standards of conduct. 19 | 20 | 1. Remarks that violate the Rust standards of conduct, including hateful, hurtful, oppressive, or exclusionary remarks, are not allowed. (Cursing is allowed, but never targeting another user, and never in a hateful manner.) 21 | 2. Remarks that moderators find inappropriate, whether listed in the code of conduct or not, are also not allowed. 22 | 3. Moderators will first respond to such remarks with a warning. 23 | 4. If the warning is unheeded, the user will be "kicked," i.e., kicked out of the communication channel to cool off. 24 | 5. If the user comes back and continues to make trouble, they will be banned, i.e., indefinitely excluded. 25 | 6. Moderators may choose at their discretion to un-ban the user if it was a first offense and they offer the offended party a genuine apology. 26 | 7. If a moderator bans someone and you think it was unjustified, please take it up with that moderator, or with a different moderator, **in private**. Complaints about bans in-channel are not allowed. 27 | 8. Moderators are held to a higher standard than other community members. If a moderator creates an inappropriate situation, they should expect less leeway than others. 28 | 29 | In the Rust community we strive to go the extra step to look out for each other. Don't just aim to be technically unimpeachable, try to be your best self. In particular, avoid flirting with offensive or sensitive issues, particularly if they're off-topic; this all too often leads to unnecessary fights, hurt feelings, and damaged trust; worse, it can drive people away from the community entirely. 30 | 31 | And if someone takes issue with something you said or did, resist the urge to be defensive. Just stop doing what it was they complained about and apologize. Even if you feel you were misinterpreted or unfairly accused, chances are good there was something you could've communicated better — remember that it's your responsibility to make your fellow Rustaceans comfortable. Everyone wants to get along and we are all here first and foremost because we want to talk about cool technology. You will find that people will be eager to assume good intent and forgive as long as you earn their trust. 32 | 33 | The enforcement policies listed above apply to all official embedded WG venues; including the official Matrix room (#rust-embedded:matrix.org) and linked IRC channels (#rust-embedded on Freenode); GitHub repositories under rust-embedded; and all forums under rust-embedded.org (forum.rust-embedded.org). 34 | 35 | *Adapted from the [Node.js Policy on Trolling](http://blog.izs.me/post/30036893703/policy-on-trolling) as well as the [Contributor Covenant v1.3.0](https://www.contributor-covenant.org/version/1/3/0/).* 36 | 37 | [wg]: https://github.com/rust-embedded/wg#organization 38 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | authors = ["Jorge Aparicio "] 3 | categories = ["embedded", "hardware-support", "no-std"] 4 | description = "Abstractions common to bare metal systems" 5 | documentation = "https://docs.rs/bare-metal" 6 | keywords = ["bare-metal", "register", "peripheral", "interrupt"] 7 | license = "MIT OR Apache-2.0" 8 | name = "bare-metal" 9 | repository = "https://github.com/rust-embedded/bare-metal" 10 | version = "1.0.0" 11 | edition = "2018" 12 | readme = "README.md" 13 | 14 | [dependencies] 15 | critical-section = "1.0" 16 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. 26 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # `bare-metal` 2 | 3 | > Abstractions common to bare metal systems 4 | 5 | This project is developed and maintained by the [Cortex-A, Cortex-M, Cortex-R, 6 | MSP430, and RISCV teams][teams]. 7 | 8 | ## [Change log](CHANGELOG.md) 9 | 10 | ## Minimum Supported Rust Version (MSRV) 11 | 12 | This crate is guaranteed to compile on stable Rust 1.54.0 and up. It *might* 13 | compile with older versions but that may change in any new patch release. 14 | 15 | ## License 16 | 17 | Licensed under either of 18 | 19 | - Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or 20 | http://www.apache.org/licenses/LICENSE-2.0) 21 | - MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) 22 | 23 | at your option. 24 | 25 | ### Contribution 26 | 27 | Unless you explicitly state otherwise, any contribution intentionally submitted 28 | for inclusion in the work by you, as defined in the Apache-2.0 license, shall be 29 | dual licensed as above, without any additional terms or conditions. 30 | 31 | ## Code of Conduct 32 | 33 | Contribution to this crate is organized under the terms of the [Rust Code of 34 | Conduct][CoC], the maintainers of this crate, the [Cortex-A, Cortex-M, 35 | Cortex-R, MSP430, and RISCV teams][teams], promise to intervene to uphold that 36 | code of conduct. 37 | 38 | [CoC]: CODE_OF_CONDUCT.md 39 | [teams]: https://github.com/rust-embedded/wg#organization 40 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | //! Abstractions common to bare metal systems. 2 | //! 3 | //! This crate is superseded by the [`critical-section`](critical_section) crate. 4 | 5 | #![deny(missing_docs)] 6 | #![no_std] 7 | #![doc(html_root_url = "https://docs.rs/bare-metal/1.0")] 8 | 9 | /// Critical section token. 10 | /// 11 | /// An instance of this type indicates that the current thread is executing code within a critical 12 | /// section. 13 | #[deprecated( 14 | since = "1.1.0", 15 | note = "use `critical_section::CriticalSection` instead" 16 | )] 17 | pub type CriticalSection<'cs> = critical_section::CriticalSection<'cs>; 18 | 19 | /// A mutex based on critical sections. 20 | /// 21 | /// # Design 22 | /// 23 | /// [`std::sync::Mutex`] has two purposes. It converts types that are [`Send`] 24 | /// but not [`Sync`] into types that are both; and it provides 25 | /// [interior mutability]. [`bare_metal::Mutex`](Mutex), on the other hand, only adds 26 | /// [`Sync`]. It does *not* provide interior mutability. 27 | /// 28 | /// This was a conscious design choice. It is possible to create multiple 29 | /// [`CriticalSection`] tokens, either by nesting critical sections or [`Copy`]ing 30 | /// an existing token. As a result, it would not be sound for [`Mutex::borrow`] 31 | /// to return `&mut T`, because there would be nothing to prevent calling 32 | /// `borrow` multiple times to create aliased `&mut T` references. 33 | /// 34 | /// The solution is to include a runtime check to ensure that each resource is 35 | /// borrowed only once. This is what [`std::sync::Mutex`] does. However, this is 36 | /// a runtime cost that may not be required in all circumstances. For instance, 37 | /// `Mutex>` never needs to create `&mut T` or equivalent. 38 | /// 39 | /// If `&mut T` is needed, the simplest solution is to use `Mutex>`, 40 | /// which is the closest analogy to `std::sync::Mutex`. [`RefCell`](core::cell::RefCell) 41 | /// inserts the exact runtime check necessary to guarantee that the `&mut T` reference 42 | /// is unique. 43 | /// 44 | /// To reduce verbosity when using `Mutex>`, we reimplement some of 45 | /// `RefCell`'s methods on it directly. 46 | /// 47 | /// ``` 48 | /// # use bare_metal::{CriticalSection, Mutex}; 49 | /// # use std::cell::RefCell; 50 | /// 51 | /// static FOO: Mutex> = Mutex::new(RefCell::new(42)); 52 | /// 53 | /// fn main() { 54 | /// let cs = unsafe { CriticalSection::new() }; 55 | /// // Instead of calling this 56 | /// let _ = FOO.borrow(cs).take(); 57 | /// // Call this 58 | /// let _ = FOO.take(cs); 59 | /// // `RefCell::borrow` and `RefCell::borrow_mut` are renamed to 60 | /// // `borrow_ref` and `borrow_ref_mut` to avoid name collisions 61 | /// let _: &mut i32 = &mut *FOO.borrow_ref_mut(cs); 62 | /// } 63 | /// ``` 64 | /// 65 | /// [`std::sync::Mutex`]: https://doc.rust-lang.org/std/sync/struct.Mutex.html 66 | /// [interior mutability]: https://doc.rust-lang.org/reference/interior-mutability.html 67 | #[deprecated(since = "1.1.0", note = "use `critical_section::Mutex` instead")] 68 | pub type Mutex = critical_section::Mutex; 69 | -------------------------------------------------------------------------------- /triagebot.toml: -------------------------------------------------------------------------------- 1 | [assign] 2 | --------------------------------------------------------------------------------