feat: add display UI with splash screen, dashboard, and RSSI sparkline

Implement full SSD1306 OLED display support:
- Splash screen on boot (1.5s) with project name, version, board
- Dashboard showing radio state, config, counters, RSSI/SNR
- RSSI history sparkline (64-sample ring buffer, 2px-wide bars)
- DisplayOn/DisplayOff host commands routed via dedicated channel
- Pure render functions against generic DrawTarget (no hardware coupling)
- Display on/off control bypasses radio task entirely

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
swaitsandClaude Opus 4.6 committed 2026-03-29 20:42:54 -06:00
1 parent 7064110293
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{"files":{".cargo_vcs_info.json":"66f7361b11351db78bdb0b77874c027f9fc7285e67044e046fe0eddb19d5ad13",".github/CODEOWNERS":"4313ec3d88c0e3fff81a7d2a8debdefef26f2c230eccb4614cdd20f2685f1d6f",".github/bors.toml":"6bb84926537bf827cd53db7fb60d2b5fa09b81c2e80e3c7de59442fbbeb0999f",".travis.yml":"eff0d7756681f458e033834df774b356a947e238fbea87a0249e28a0ab7f9d21","CHANGELOG.md":"7b99fc80ef0ed35bcc36b8fd4322aa286bf8fa355c98ac9068b55dae67be2b8b","CODE_OF_CONDUCT.md":"b9c2b6479ebc12906824ff6ec1044150e20b374e915e9978fa14acd08f3bc21c","Cargo.toml":"f14626b8a73998ef7432aa172929ce3a75b7f271c3743148a992b038105cc269","Cargo.toml.orig":"00194eab8236a61176317657ea89b86e014c0f97060df496973f17caf6bf7d6a","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"035e70219855119df4273b3c5b97543ae82e0dd60c520416e759107c602f651b","README.md":"2a242efd77173001df6ac6643b5da8f856622e3aa8a6aa740372225b1696cfcd","ci/install.sh":"e295d97db9e12ac6ee3e523e4597ad58fedcca2b8aa3a21302951ad2327b88a9","ci/script.sh":"3919488bcadc070e9e535c3aa34b026cbc57c98d1968480e349e66d096f95c6b","src/lib.rs":"35d69f1e3269ec022d808f151c5a9d94607b19accd0699514217ed35e8176b82","triagebot.toml":"a135e10c777cd13459559bdf74fb704c1379af7c9b0f70bc49fa6f5a837daa81"},"package":"f8fe8f5a8a398345e52358e18ff07cc17a568fbca5c6f73873d3a62056309603"}
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{
"git": {
"sha1": "271d17d67fb6e214b7c50f7d0ca30e24d4ab3ba9"
}
}
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* rust-embedded/cortex-a rust-embedded/cortex-m rust-embedded/cortex-r rust-embedded/msp430 rust-embedded/riscv
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block_labels = ["needs-decision"]
delete_merged_branches = true
required_approvals = 1
status = ["continuous-integration/travis-ci/push"]
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language: rust
matrix:
allow_failures:
- rust: nightly
include:
- rust: stable
if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
- rust: nightly
if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
# MSRV
- rust: 1.31.0
if: (branch = staging OR branch = trying) OR (type = pull_request AND branch = master)
branches:
only:
- master
- staging
- trying
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# Change Log
All notable changes to this project will be documented in this file.
This project adheres to [Semantic Versioning](http://semver.org/).
## [Unreleased]
## [v1.0.0] - 2020-06-23
### Breaking Changes
- Use `CriticalSection<'cs>` everywhere instead of `&'cs CriticalSection`
(this makes it a zero-sized type).
- Removed the `const-fn` feature.
- Removed the `Peripheral` wrapper type.
## [v0.2.5] - 2019-08-29
### Changed
- The `const-fn` feature is now stable.
## [v0.2.4] - 2018-10-30
### Added
- Note in the documentation that `Mutex` is not memory safe in multi-core systems.
### Changed
- The `const-fn` feature can now be used on 1.31-beta and will also work on stable 1.31.
## [v0.2.3] - 2018-08-17
### Fixed
- A compilation error when using a recent nightly while the "const-fn" feature was enabled.
## [v0.2.2] - 2018-08-17 - YANKED
### Fixed
- A compilation error when using a recent nightly while the "const-fn" feature was enabled.
## [v0.2.1] - 2018-08-03
### Fixed
- Soundness issue where it was possible to borrow the contents of a Mutex for longer than the
lifetime of the Mutex.
## [v0.2.0] - 2018-05-10 - YANKED
YANKED due to a soundness issue: see v0.2.1 for details
### Changed
- [breaking-change] `const-fn` is no longer a default feature (i.e. a feature that's enabled by
default). The consequence is that this crate now compiles on 1.27 (beta) by default, and opting
into `const-fn` requires nightly.
## [v0.1.2] - 2018-04-24
### Added
- An opt-out "const-fn" Cargo feature. When this feature is disabled this crate compiles on stable.
## [v0.1.1] - 2017-09-19
### Fixed
- Added feature gate to make this work on recent nightlies
## v0.1.0 - 2017-07-06
- Initial release
[Unreleased]: https://github.com/japaric/bare-metal/compare/v1.0.0...HEAD
[v1.0.0]: https://github.com/japaric/bare-metal/compare/v0.2.5...v1.0.0
[v0.2.5]: https://github.com/japaric/bare-metal/compare/v0.2.4...v0.2.5
[v0.2.4]: https://github.com/japaric/bare-metal/compare/v0.2.3...v0.2.4
[v0.2.3]: https://github.com/japaric/bare-metal/compare/v0.2.2...v0.2.3
[v0.2.2]: https://github.com/japaric/bare-metal/compare/v0.2.1...v0.2.2
[v0.2.1]: https://github.com/japaric/bare-metal/compare/v0.2.0...v0.2.1
[v0.2.0]: https://github.com/japaric/bare-metal/compare/v0.1.2...v0.2.0
[v0.1.2]: https://github.com/japaric/bare-metal/compare/v0.1.1...v0.1.2
[v0.1.1]: https://github.com/japaric/bare-metal/compare/v0.1.0...v0.1.1
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# The Rust Code of Conduct
## Conduct
**Contact**: [Embedded WG][wg]
* 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.
* 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.
* Please be kind and courteous. There's no need to be mean or rude.
* 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.
* 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.
* 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.
* 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.
* Likewise any spamming, trolling, flaming, baiting or other attention-stealing behavior is not welcome.
## Moderation
These are the policies for upholding our community's standards of conduct.
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.)
2. Remarks that moderators find inappropriate, whether listed in the code of conduct or not, are also not allowed.
3. Moderators will first respond to such remarks with a warning.
4. If the warning is unheeded, the user will be "kicked," i.e., kicked out of the communication channel to cool off.
5. If the user comes back and continues to make trouble, they will be banned, i.e., indefinitely excluded.
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.
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.
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.
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.
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.
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).
*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/).*
[wg]: https://github.com/rust-embedded/wg#organization
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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies
#
# If you believe there's an error in this file please file an
# issue against the rust-lang/cargo repository. If you're
# editing this file be aware that the upstream Cargo.toml
# will likely look very different (and much more reasonable)
[package]
name = "bare-metal"
version = "1.0.0"
authors = ["Jorge Aparicio <jorge@japaric.io>"]
description = "Abstractions common to bare metal systems"
documentation = "https://docs.rs/bare-metal"
readme = "README.md"
keywords = ["bare-metal", "register", "peripheral", "interrupt"]
categories = ["embedded", "hardware-support", "no-std"]
license = "MIT OR Apache-2.0"
repository = "https://github.com/rust-embedded/bare-metal"
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Copyright (c) 2017 Jorge Aparicio
Permission is hereby granted, free of charge, to any
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SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
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# `bare-metal`
> Abstractions common to bare metal systems
This project is developed and maintained by the [Cortex-A, Cortex-M, Cortex-R,
MSP430, and RISCV teams][teams].
## [Change log](CHANGELOG.md)
## Minimum Supported Rust Version (MSRV)
This crate is guaranteed to compile on stable Rust 1.31.0 and up. It *might*
compile with older versions but that may change in any new patch release.
## License
Licensed under either of
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
## Code of Conduct
Contribution to this crate is organized under the terms of the [Rust Code of
Conduct][CoC], the maintainers of this crate, the [Cortex-A, Cortex-M,
Cortex-R, MSP430, and RISCV teams][teams], promise to intervene to uphold that
code of conduct.
[CoC]: CODE_OF_CONDUCT.md
[teams]: https://github.com/rust-embedded/wg#organization
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set -euxo pipefail
main() {
if [ $TARGET != x86_64-unknown-linux-gnu ]; then
rustup target add $TARGET
fi
}
main
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set -euxo pipefail
export RUSTFLAGS="-D warnings"
main() {
cargo check --target $TARGET
if [ $TARGET = x86_64-unknown-linux-gnu ]; then
cargo test
fi
}
main
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//! Abstractions common to bare metal systems.
#![deny(missing_docs)]
#![no_std]
#![doc(html_root_url="https://docs.rs/bare-metal/1.0")]
use core::cell::UnsafeCell;
use core::marker::PhantomData;
/// Critical section token.
///
/// An instance of this type indicates that the current core is executing code within a critical
/// section. This means that no interrupts must be enabled that could preempt the currently running
/// code.
#[derive(Clone, Copy, Debug)]
pub struct CriticalSection<'cs> {
_0: PhantomData<&'cs ()>,
}
impl<'cs> CriticalSection<'cs> {
/// Creates a critical section token.
///
/// This method is meant to be used to create safe abstractions rather than being directly used
/// in applications.
///
/// # Safety
///
/// This must only be called when the current core is in a critical section. The caller must
/// ensure that the returned instance will not live beyond the end of the critical section.
/// Moreover, the caller must use adequate fences to prevent the compiler from moving the
/// instructions inside the critical section to the outside of it. Sequentially consistent fences are
/// suggested immediately after entry and immediately before exit from the critical section.
///
/// Note that the lifetime `'cs` of the returned instance is unconstrained. User code must not
/// be able to influence the lifetime picked for this type, since that might cause it to be
/// inferred to `'static`.
#[inline(always)]
pub unsafe fn new() -> Self {
CriticalSection { _0: PhantomData }
}
}
/// A "mutex" based on critical sections.
///
/// # Safety
///
/// **This Mutex is only safe on single-core systems.**
///
/// On multi-core systems, a `CriticalSection` **is not sufficient** to ensure exclusive access.
#[derive(Debug)]
pub struct Mutex<T> {
inner: UnsafeCell<T>,
}
impl<T> Mutex<T> {
/// Creates a new mutex.
pub const fn new(value: T) -> Self {
Mutex {
inner: UnsafeCell::new(value),
}
}
/// Gets a mutable reference to the contained value when the mutex is already uniquely borrowed.
///
/// This does not require locking or a critical section since it takes `&mut self`, which
/// guarantees unique ownership already. Care must be taken when using this method to
/// **unsafely** access `static mut` variables, appropriate fences must be used to prevent
/// unwanted optimizations.
pub fn get_mut(&mut self) -> &mut T {
unsafe { &mut *self.inner.get() }
}
/// Unwraps the contained value, consuming the mutex.
pub fn into_inner(self) -> T {
self.inner.into_inner()
}
/// Borrows the data for the duration of the critical section.
pub fn borrow<'cs>(&'cs self, _cs: CriticalSection<'cs>) -> &'cs T {
unsafe { &*self.inner.get() }
}
}
// NOTE A `Mutex` can be used as a channel so the protected data must be `Send`
// to prevent sending non-Sendable stuff (e.g. access tokens) across different
// execution contexts (e.g. interrupts)
unsafe impl<T> Sync for Mutex<T> where T: Send {}
/// ``` compile_fail
/// fn bad(cs: bare_metal::CriticalSection) -> &u32 {
/// let x = bare_metal::Mutex::new(42u32);
/// x.borrow(cs)
/// }
/// ```
#[allow(dead_code)]
#[doc(hidden)]
const GH_6: () = ();
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[assign]