fw-rust: Minimal hello world

firmware/rust/.cargo/config.toml

@@ -0,0 +1,5 @@
+[build]
+target = "avr-specs/avr-atmega328p.json"
+
+[unstable]
+build-std = ["core"]

firmware/rust/.gitignore

@@ -0,0 +1 @@
+/target

firmware/rust/Cargo.lock

@@ -0,0 +1,215 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
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+ "avr-device",
+ "avr-hal-generic",
+]
+
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+ "avr-device-macros",
+ "bare-metal",
+ "cfg-if",
+ "vcell",
+]
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+
+[[package]]
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+ "avr-device",
+ "cfg-if",
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+ "nb 0.1.3",
+ "paste",
+ "ufmt",
+ "void",
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+
+[[package]]
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+dependencies = [
+ "atmega-hal",
+ "embedded-hal",
+ "nb 1.0.0",
+ "panic-halt",
+]
+
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firmware/rust/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "clock-generator"
+version = "0.1.0-dev"
+authors = ["finga <finga@onders.org>"]
+edition = "2018"
+license = "GPL-3.0-or-later"
+
+[[bin]]
+name = "clock-generator"
+test = false
+bench = false
+
+[dependencies]
+panic-halt = "0.2"
+nb = "1.0"
+embedded-hal = "0.2"
+
+[dependencies.atmega-hal]
+git = "https://github.com/rahix/avr-hal"
+branch = "main"
+features = ["atmega328p", "rt"]
+
+[profile.dev]
+panic = "abort"
+lto = true
+opt-level = "s"
+
+[profile.release]
+panic = "abort"
+codegen-units = 1
+debug = true
+lto = true
+opt-level = "s"

firmware/rust/avr-specs/avr-atmega328p.json

@@ -0,0 +1,27 @@
+{
+  "arch": "avr",
+  "atomic-cas": false,
+  "cpu": "atmega328p",
+  "data-layout": "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8",
+  "eh-frame-header": false,
+  "exe-suffix": ".elf",
+  "executables": true,
+  "late-link-args": {
+    "gcc": [
+      "-lgcc"
+    ]
+  },
+  "linker": "avr-gcc",
+  "linker-is-gnu": true,
+  "llvm-target": "avr-unknown-unknown",
+  "max-atomic-width": 8,
+  "no-default-libraries": false,
+  "pre-link-args": {
+    "gcc": [
+      "-mmcu=atmega328p",
+      "-Wl,--as-needed"
+    ]
+  },
+  "target-c-int-width": "16",
+  "target-pointer-width": "16"
+}

firmware/rust/rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "nightly-2021-01-07"
+components = [ "rust-src" ]
+profile = "minimal"

firmware/rust/src/main.rs

@@ -0,0 +1,20 @@
+#![no_std]
+#![no_main]
+
+use atmega_hal::{clock::MHz8, delay::Delay, pins, Peripherals};
+use embedded_hal::blocking::delay::DelayMs;
+use panic_halt as _;
+
+#[atmega_hal::entry]
+fn main() -> ! {
+    let dp = Peripherals::take().unwrap();
+    let pins = pins!(dp);
+
+    let mut led = pins.pd5.into_output();
+    let mut delay = Delay::<MHz8>::new();
+
+    loop {
+        led.toggle();
+        delay.delay_ms(255_u8);
+    }
+}