Add support for Adafruit CANBus Feather RP2040

Adds support for https://www.adafruit.com/product/5724
Copied mostly from the adafruit-feather-rp2040

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 resolver = "2"
 members = [
+    "boards/adafruit-canbus-feather-rp2040",
     "boards/adafruit-feather-rp2040",
     "boards/adafruit-itsy-bitsy-rp2040",
     "boards/adafruit-kb2040",

README.md

@@ -93,14 +93,26 @@ Each BSP includes some examples to show off the features of that particular boar
 ### [rp-pico] - Board Support for the [Raspberry Pi Pico]
 
 You should include this crate if you are writing code that you want to run on
-a [Raspberry Pi Pico] - the original launch PCB for the RP2040 chip.  
+a [Raspberry Pi Pico] - the original launch PCB for the RP2040 chip.
 
 This crate includes the [rp2040-hal], but also configures each pin of the
 RP2040 chip according to how it is connected up on the Pico.
 
 [Raspberry Pi Pico]: https://www.raspberrypi.org/products/raspberry-pi-pico/
 [rp-pico]: https://github.com/rp-rs/rp-hal-boards/tree/main/boards/rp-pico
 
+### [adafruit-canbus-feather-rp2040] - Board Support for the [Adafruit CANBus Feather RP2040]
+
+You should include this crate if you are writing code that you want to run on
+an [Adafruit CANBus Feather RP2040] - a Feather form-factor RP2040 board from Adafruit with
+built in CAN Bus support.
+
+This crate includes the [rp2040-hal], but also configures each pin of the
+RP2040 chip according to how it is connected up on the CANBus Feather RP2040.
+
+[Adafruit CANBus Feather RP2040]: https://www.adafruit.com/product/5724
+[adafruit-canbus-feather-rp2040]: https://github.com/rp-rs/rp-hal-boards/tree/main/boards/adafruit-canbus-feather-rp2040
+
 ### [adafruit-feather-rp2040] - Board Support for the [Adafruit Feather RP2040]
 
 You should include this crate if you are writing code that you want to run on
@@ -335,7 +347,7 @@ RP2040 chip according to how it is connected up on the Feather.
 ### [waveshare-rp2040-lcd-0_96] - Board Support for the [Waveshare RP2040 LCD 0.96"]
 
 You should include this crate if you are writing code that you want to run on
-an [Waveshare RP2040 LCD 0.96"] - a very small RP2040 breakout board with USB-C, 
+an [Waveshare RP2040 LCD 0.96"] - a very small RP2040 breakout board with USB-C,
 a 65K IPS LCD 160x80, 16MBit Flash and 1A battery charger from Waveshare.
 
 This crate includes the [rp2040-hal], but also configures each pin of the

boards/adafruit-canbus-feather-rp2040/CHANGELOG.md

@@ -0,0 +1,10 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## Unreleased
+
+- Initial release

boards/adafruit-canbus-feather-rp2040/Cargo.toml

@@ -0,0 +1,51 @@
+[package]
+name = "adafruit-canbus-feather-rp2040"
+version = "0.1.0"
+authors = ["Thad House <[email protected]>", "The rp-rs Developers"]
+edition = "2018"
+homepage = "https://github.com/rp-rs/rp-hal-boards/tree/main/boards/adafruit-canbus-feather-rp2040"
+description = "Board Support Package for the Adafruit CANBus Feather RP2040"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rp-rs/rp-hal-boards.git"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cortex-m-rt = { workspace = true, optional = true }
+rp2040-boot2 = { workspace = true, optional = true }
+rp2040-hal.workspace = true
+
+[dev-dependencies]
+cortex-m.workspace = true
+panic-halt.workspace = true
+embedded-hal.workspace = true
+fugit.workspace = true
+nb.workspace = true
+smart-leds.workspace = true
+ws2812-pio.workspace = true
+
+[features]
+# This is the set of features we enable by default
+default = ["boot2", "rt", "critical-section-impl", "rom-func-cache"]
+
+# critical section that is safe for multicore use
+critical-section-impl = ["rp2040-hal/critical-section-impl"]
+
+# 2nd stage bootloaders for rp2040
+boot2 = ["rp2040-boot2"]
+
+# Minimal startup / runtime for Cortex-M microcontrollers
+rt = ["cortex-m-rt","rp2040-hal/rt"]
+
+# This enables a fix for USB errata 5: USB device fails to exit RESET state on busy USB bus.
+# Only required for RP2040 B0 and RP2040 B1, but it doesn't hurt to enable it
+rp2040-e5 = ["rp2040-hal/rp2040-e5"]
+
+# Memoize(cache) ROM function pointers on first use to improve performance
+rom-func-cache = ["rp2040-hal/rom-func-cache"]
+
+# Disable automatic mapping of language features (like floating point math) to ROM functions
+disable-intrinsics = ["rp2040-hal/disable-intrinsics"]
+
+# This enables ROM functions for f64 math that were not present in the earliest RP2040s
+rom-v2-intrinsics = ["rp2040-hal/rom-v2-intrinsics"]

boards/adafruit-canbus-feather-rp2040/README.md

@@ -0,0 +1,99 @@
+# [adafruit-canbus-feather-rp2040] - Board Support for the [Adafruit CANBus Feather RP2040]
+
+You should include this crate if you are writing code that you want to run on
+an [Adafruit CANBus Feather RP2040] - a Feather form-factor RP2040 board from Adafruit with built in
+CAN Bus support.
+
+This crate includes the [rp2040-hal], but also configures each pin of the
+RP2040 chip according to how it is connected up on the Feather.
+
+[Adafruit CANBus Feather RP2040]: https://www.adafruit.com/product/5724
+[adafruit-canbus-feather-rp2040]: https://github.com/rp-rs/rp-hal-boards/tree/main/boards/adafruit-canbus-feather-rp2040
+[rp2040-hal]: https://github.com/rp-rs/rp-hal/tree/main/rp2040-hal
+[Raspberry Silicon RP2040]: https://www.raspberrypi.org/products/rp2040/
+
+## Using
+
+To use this crate, your `Cargo.toml` file should contain:
+
+```toml
+adafruit-canbus-feather-rp2040 = "0.1.0"
+```
+
+In your program, you will need to call `adafruit_canbus_feather_rp2040::Pins::new` to create
+a new `Pins` structure. This will set up all the GPIOs for any on-board
+devices. See the [examples](./examples) folder for more details.
+
+## Examples
+
+### General Instructions
+
+To compile an example, clone the _rp-hal-boards_ repository and run:
+
+```console
+rp-hal-boards/boards/adafruit-canbus-feather-rp2040 $ cargo build --release --example <name>
+```
+
+You will get an ELF file called
+`./target/thumbv6m-none-eabi/release/examples/<name>`, where the `target`
+folder is located at the top of the _rp-hal-boards_ repository checkout. Normally
+you would also need to specify `--target=thumbv6m-none-eabi` but when
+building examples from this git repository, that is set as the default.
+
+If you want to convert the ELF file to a UF2 and automatically copy it to the
+USB drive exported by the RP2040 bootloader, simply boot your board into
+bootloader mode and run:
+
+```console
+rp-hal-boards/boards/adafruit-canbus-feather-rp2040 $ cargo run --release --example <name>
+```
+
+If you get an error about not being able to find `elf2uf2-rs`, try:
+
+```console
+$ cargo install elf2uf2-rs, then repeating the `cargo run` command above.
+```
+
+### [adafruit_canbus_feather_blinky](./examples/adafruit_canbus_feather_blinky.rs)
+
+Flashes the Feather's onboard LED on and off.
+
+### [adafruit_canbus_feather_neopixel_rainbow](./examples/adafruit_canbus_feather_neopixel_rainbow.rs)
+
+Flows smoothly through various colors on the Feather's onboard NeoPixel LED.
+
+## Contributing
+
+Contributions are what make the open source community such an amazing place to
+be, learn, inspire, and create. Any contributions you make are **greatly
+appreciated**.
+
+The steps are:
+
+1. Fork the Project by clicking the 'Fork' button at the top of the page.
+2. Create your Feature Branch (`git checkout -b feature/AmazingFeature`)
+3. Make some changes to the code or documentation.
+4. Commit your Changes (`git commit -m 'Add some AmazingFeature'`)
+5. Push to the Feature Branch (`git push origin feature/AmazingFeature`)
+6. Create a [New Pull Request](https://github.com/rp-rs/rp-hal-boards/pulls)
+7. An admin will review the Pull Request and discuss any changes that may be required.
+8. Once everyone is happy, the Pull Request can be merged by an admin, and your work is part of our project!
+
+## Code of Conduct
+
+Contribution to this crate is organized under the terms of the [Rust Code of
+Conduct][CoC], and the maintainer of this crate, the [rp-rs team], promises
+to intervene to uphold that code of conduct.
+
+[CoC]: CODE_OF_CONDUCT.md
+[rp-rs team]: https://github.com/orgs/rp-rs/teams/rp-rs
+
+## License
+
+The contents of this repository are dual-licensed under the _MIT OR Apache
+2.0_ License. That means you can choose either the MIT license or the
+Apache-2.0 license when you re-use this code. See `MIT` or `APACHE2.0` for more
+information on each specific license.
+
+Any submissions to this project (e.g. as Pull Requests) must be made available
+under these terms.

boards/adafruit-canbus-feather-rp2040/examples/adafruit_canbus_feather_blinky.rs

@@ -0,0 +1,56 @@
+//! Blinks the LED on a Adafruit Feather RP2040 board
+//!
+//! This will blink on-board LED.
+#![no_std]
+#![no_main]
+
+use adafruit_canbus_feather_rp2040::entry;
+use adafruit_canbus_feather_rp2040::{
+    hal::{
+        clocks::{init_clocks_and_plls, Clock},
+        pac,
+        watchdog::Watchdog,
+        Sio,
+    },
+    Pins, XOSC_CRYSTAL_FREQ,
+};
+use embedded_hal::digital::v2::OutputPin;
+use panic_halt as _;
+
+#[entry]
+fn main() -> ! {
+    let mut pac = pac::Peripherals::take().unwrap();
+    let core = pac::CorePeripherals::take().unwrap();
+
+    let mut watchdog = Watchdog::new(pac.WATCHDOG);
+
+    let clocks = init_clocks_and_plls(
+        XOSC_CRYSTAL_FREQ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+
+    let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
+
+    let sio = Sio::new(pac.SIO);
+    let pins = Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+    let mut led_pin = pins.d13.into_push_pull_output();
+
+    loop {
+        led_pin.set_high().unwrap();
+        delay.delay_ms(1500);
+        led_pin.set_low().unwrap();
+        delay.delay_ms(1500);
+    }
+}

boards/adafruit-canbus-feather-rp2040/examples/adafruit_canbus_feather_neopixel_rainbow.rs

@@ -0,0 +1,100 @@
+//! Rainbow effect color wheel using the onboard NeoPixel on an Adafruit CANBus Feather RP2040 board
+//!
+//! This flows smoothly through various colors on the onboard NeoPixel.
+//! Uses the `ws2812_pio` driver to control the NeoPixel, which in turns uses the
+//! RP2040's PIO block.
+#![no_std]
+#![no_main]
+
+use adafruit_canbus_feather_rp2040::entry;
+use adafruit_canbus_feather_rp2040::{
+    hal::{
+        clocks::{init_clocks_and_plls, Clock},
+        gpio::PinState,
+        pac,
+        pio::PIOExt,
+        timer::Timer,
+        watchdog::Watchdog,
+        Sio,
+    },
+    Pins, XOSC_CRYSTAL_FREQ,
+};
+use core::iter::once;
+use embedded_hal::timer::CountDown;
+use fugit::ExtU32;
+use panic_halt as _;
+use smart_leds::{brightness, SmartLedsWrite, RGB8};
+use ws2812_pio::Ws2812;
+
+#[entry]
+fn main() -> ! {
+    let mut pac = pac::Peripherals::take().unwrap();
+
+    let mut watchdog = Watchdog::new(pac.WATCHDOG);
+
+    let clocks = init_clocks_and_plls(
+        XOSC_CRYSTAL_FREQ,
+        pac.XOSC,
+        pac.CLOCKS,
+        pac.PLL_SYS,
+        pac.PLL_USB,
+        &mut pac.RESETS,
+        &mut watchdog,
+    )
+    .ok()
+    .unwrap();
+
+    let sio = Sio::new(pac.SIO);
+    let pins = Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    let timer = Timer::new(pac.TIMER, &mut pac.RESETS, &clocks);
+    let mut delay = timer.count_down();
+
+    pins.neopixel_power
+        .into_push_pull_output_in_state(PinState::High);
+
+    // Configure the addressable LED
+    let (mut pio, sm0, _, _, _) = pac.PIO0.split(&mut pac.RESETS);
+    let mut ws = Ws2812::new(
+        // The onboard NeoPixel is attached to GPIO pin #16 on the Feather RP2040.
+        pins.neopixel_data.into_function(),
+        &mut pio,
+        sm0,
+        clocks.peripheral_clock.freq(),
+        timer.count_down(),
+    );
+
+    // Infinite colour wheel loop
+    let mut n: u8 = 128;
+    loop {
+        ws.write(brightness(once(wheel(n)), 32)).unwrap();
+        n = n.wrapping_add(1);
+
+        delay.start(25.millis());
+        let _ = nb::block!(delay.wait());
+    }
+}
+
+/// Convert a number from `0..=255` to an RGB color triplet.
+///
+/// The colours are a transition from red, to green, to blue and back to red.
+fn wheel(mut wheel_pos: u8) -> RGB8 {
+    wheel_pos = 255 - wheel_pos;
+    if wheel_pos < 85 {
+        // No green in this sector - red and blue only
+        (255 - (wheel_pos * 3), 0, wheel_pos * 3).into()
+    } else if wheel_pos < 170 {
+        // No red in this sector - green and blue only
+        wheel_pos -= 85;
+        (0, wheel_pos * 3, 255 - (wheel_pos * 3)).into()
+    } else {
+        // No blue in this sector - red and green only
+        wheel_pos -= 170;
+        (wheel_pos * 3, 255 - (wheel_pos * 3), 0).into()
+    }
+}