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.github/workflows/ci.yml

@@ -1,39 +1,21 @@
 name: ci
 
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
 
 jobs:
-  compile:
+  build:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        include:
-          - rust: stable
-          # - rust: nightly
-
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: ${{ matrix.rust }}
-          components: llvm-tools-preview
-
-      - name: install cargo-binutils
-        uses: actions-rs/cargo@v1
-        with:
-          command: install
-          args: cargo-binutils
-          toolchain: ${{ matrix.rust }}
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo install cargo-binutils
 
-      - name: program size
-        uses: actions-rs/cargo@v1
-        with:
-          command: size
-          args: --release
-          toolchain: ${{ matrix.rust }}
+      - run: cargo build
+      - run: cargo size
 
-      - name: lint
-        uses: actions-rs/clippy-check@v1
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Annotate commit with clippy warnings
+        uses: giraffate/clippy-action@v1

Cargo.toml

@@ -5,9 +5,10 @@ version = "0.1.0"
 authors = ["Damjan Georgievski <[email protected]>"]
 
 [dependencies]
-cortex-m-rt = "0.6.15" # can't upgrade higher until g0xx-hal catches up
-stm32g0xx-hal = { version = "0.1.2", features = ["stm32g031", "rt"] }
-rtt-target = { version = "0.3.1", features = ["cortex-m"] }
+stm32g0xx-hal = { version = "0.2", features = ["stm32g031", "rt"] }
+cortex-m-rt = "0.7.4"
+panic-halt = "0.2.0"
+rtt-target = "0.5.0"
 
 [profile.release]
 debug = true # "true" is ok, symbols reside on the host, not the target

Embed.toml

@@ -1,2 +1,5 @@
+[default.general]
+chip = "STM32G031J6Mx"
+
 [default.rtt]
 enabled = true

README.md

@@ -11,24 +11,14 @@ a quite small 8pin mcu, which has only 8KB ram and 32KB flash.
 
 ### Setup tooling:
 
-- install cortex-m0 support for rust: `rustup target add thumbv6m-none-eabi`
-
-- install [cargo-flash](https://probe.rs/docs/tools/cargo-flash/):
-  `cargo install cargo-flash`
-
-- on Linux make sure udev rules allow non-root access, see
-  [probe setup](https://probe.rs/docs/getting-started/probe-setup/).
-
-- `arm-none-eabi-binutils` and `arm-none-eabi-gdb` are recommended, but not
-  mandatory
-
-- optional, for advanced debugging with RTT see [cargo embed](https://probe.rs/docs/tools/cargo-embed/)
-  and/or the [vscode extension](https://probe.rs/docs/tools/vscode/).
+- [`rustup`](https://rustup.rs/) - is recommended to install rust and its components
+- `cargo install cargo-binutils` - for `cargo size` and `cargo objdump -- --disassemble`, etc…
+- `cargo install cargo-embed` - flash and debug using the [`probe-rs project`](https://probe.rs/)
 
 ### Compile and flash:
 
 ```
-cargo flash --release --chip stm32g031j6mx
+cargo embed --release
 ```
 
 ## Notes:

rust-toolchain.toml

@@ -1,2 +1,4 @@
 [toolchain]
+channel = "stable"
 targets = ["thumbv6m-none-eabi"]
+components = [ "rust-src", "rustfmt", "llvm-tools" ]

src/main.rs

@@ -3,38 +3,29 @@
 #![no_main]
 #![no_std]
 
-use core::panic::PanicInfo;
-use rtt_target::{rprintln, rtt_init_print};
-
+use panic_halt as _;
 use stm32g0xx_hal as hal;
 
 use hal::prelude::*;
 use hal::rcc::Config;
 use hal::stm32;
 
+use rtt_target::{rprintln, rtt_init_print};
+
 #[cortex_m_rt::entry]
 fn main() -> ! {
     rtt_init_print!();
+    rprintln!("Hello, world!");
+
     let dp = stm32::Peripherals::take().expect("cannot take peripherals");
-    let mut rcc = dp.RCC.freeze(Config::lsi()); // configure clocks
-    let mut delay = dp.TIM16.delay(&mut rcc); // and now we can have a working delay
+    let mut rcc = dp.RCC.freeze(Config::lsi());
+    let mut delay = dp.TIM16.delay(&mut rcc);
 
-    let gpioa = dp.GPIOA.split(&mut rcc); // get gpio port A
-    let mut led = gpioa.pa12.into_push_pull_output(); // the led is on 12th pin
+    let gpioa = dp.GPIOA.split(&mut rcc);
+    let mut led = gpioa.pa5.into_push_pull_output();
 
-    rprintln!("Hello, world!");
     loop {
-        // led.toggle().unwrap();
-        led.set_high().unwrap();
-        delay.delay(150.ms());
-        led.set_low().unwrap();
-        delay.delay(850.ms());
+        led.toggle().unwrap();
+        delay.delay(500.millis());
     }
 }
-
-#[inline(never)]
-#[panic_handler]
-fn panic(info: &PanicInfo) -> ! {
-    rprintln!("{}", info);
-    loop {}
-}