Inital commit

.cargo/config.toml

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+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# Choose a default "cargo run" tool:
+# - probe-run provides flashing and defmt via a hardware debugger
+# - cargo embed offers flashing, rtt, defmt and a gdb server via a hardware debugger
+#     it is configured via the Embed.toml in the root of this project
+# - elf2uf2-rs loads firmware over USB when the rp2040 is in boot mode
+# runner = "probe-run --chip RP2040"
+# runner = "cargo embed"
+runner = "elf2uf2-rs -d"
+
+[build]
+# Cortex-M0 and Cortex-M0+
+target = "thumbv6m-none-eabi"
+
+[env]
+# DEFMT_LOG = "debug"

.gitea/workflows/pull_request.yaml

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+name: Terrarium Controller Merge Build
+run_name: Test successful terrarium controller build on merge request
+
+on:
+  pull_request:
+    types: [opened, reopened, edited, review_requested, synchronize]
+
+jobs:
+  Build:
+    steps:
+      - uses: https://github.com/actions/checkout@v3
+
+      - uses: https://github.com/dtolnay/rust-toolchain@stable
+
+      - name: Build
+        run: cargo build

.gitignore

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+/target
+Cargo.lock

.vscode/settings.json

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+{
+    "rust-analyzer.check.allTargets": false
+}

Cargo.toml

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+[package]
+name = "rust-embassy-template"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+embassy-executor = { version = "0.5.0", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "integrated-timers"] }
+embassy-rp = { version = "0.1.0", features = ["unstable-pac", "time-driver", "critical-section-impl"] }
+embassy-futures = { version = "0.1.1" }
+
+cortex-m-rt = "0.7.0"

build.rs

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+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
+    // println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}

memory.x

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+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+
+    /* Pick one of the two options for RAM layout     */
+
+    /* OPTION A: Use all RAM banks as one big block   */
+    /* Reasonable, unless you are doing something     */
+    /* really particular with DMA or other concurrent */
+    /* access that would benefit from striping        */
+    RAM   : ORIGIN = 0x20000000, LENGTH = 264K
+
+    /* OPTION B: Keep the unstriped sections separate */
+    /* RAM: ORIGIN = 0x20000000, LENGTH = 256K        */
+    /* SCRATCH_A: ORIGIN = 0x20040000, LENGTH = 4K    */
+    /* SCRATCH_B: ORIGIN = 0x20041000, LENGTH = 4K    */
+}

renovate.json

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+{
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": [
+        "config:base"
+    ],
+    "packageRules": [
+        {
+            "matchUpdateTypes": [
+                "minor",
+                "patch"
+            ],
+            "automerge": true
+        }
+    ]
+}

rust-toolchain.toml

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+[toolchain]
+components = [ "rust-src", "rustfmt", "llvm-tools" ]
+targets = ["thumbv6m-none-eabi"]

src/main.rs

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+#![no_std]
+#![no_main]
+
+use core::panic::PanicInfo;
+
+use embassy_executor::Spawner;
+use embassy_rp::gpio::{Level, Output};
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+
+    let mut pin = Output::new(p.PIN_25, Level::High);
+
+    let toggle_led = async {
+        loop {
+            pin.toggle();
+        }
+    };
+
+    toggle_led.await;
+}