Initial commit, fails with the following though:

$ cargo build
  Downloaded as5600 v0.6.0
  Downloaded 1 crate (14.1 KB) in 0.85s
   Compiling autocfg v1.1.0
   Compiling num-derive v0.4.2
   Compiling nb v0.1.3
   Compiling embedded-hal v0.2.7
   Compiling num-traits v0.2.18
   Compiling as5600 v0.6.0
   Compiling embassy-avr-as5600-encoder v0.1.0 (/home/rvalls/dev/personal/embassy-avr-as5600-encoder)
error[E0658]: `impl Trait` in associated types is unstable
 --> src/main.rs:8:1
  |
8 | #[embassy_executor::main]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #63063 <rust-lang/rust#63063> for more information
  = help: add `#![feature(impl_trait_in_assoc_type)]` to the crate attributes to enable
  = note: this compiler was built on 2024-03-23; consider upgrading it if it is out of date
  = note: this error originates in the attribute macro `::embassy_executor::task` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0658`.
error: could not compile `embassy-avr-as5600-encoder` (bin "embassy-avr-as5600-encoder") due to 1 previous error

.cargo/config.toml

@@ -0,0 +1,4 @@
+[build]
+target = "avr-specs/avr-atmega328p.json"
+[unstable]
+build-std = ["core"]

.gitignore

@@ -0,0 +1,2 @@
+target
+Cargo.lock

Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+edition = "2021"
+name = "embassy-avr-as5600-encoder"
+version = "0.1.0"
+authors = ["brainstorm <brainstorm@nopcode.org>"]
+resolver = "2"
+
+[dependencies]
+panic-halt = "0.2"
+embassy-executor = { git = "https://github.com/embassy-rs/embassy", features = ["arch-avr", "nightly", "executor-thread"] }
+avr-device = { version = "0.5", features = ["atmega328p", "rt"] }
+as5600 = "0.6.0"
+
+[profile.dev]
+panic = "abort"
+lto = true
+opt-level = "s"
+
+[profile.release]
+panic = "abort"
+codegen-units = 1
+lto = true
+opt-level = "s"

avr-specs/avr-atmega328p.json

@@ -0,0 +1,25 @@
+{
+  "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",
+  "late-link-args": {
+    "gcc": [
+      "-lgcc"
+    ]
+  },
+  "linker": "avr-gcc",
+  "llvm-target": "avr-unknown-unknown",
+  "max-atomic-width": 8,
+  "no-default-libraries": false,
+  "pre-link-args": {
+    "gcc": [
+      "-mmcu=atmega328p"
+    ]
+  },
+  "relocation-model": "static",
+  "target-c-int-width": "16",
+  "target-pointer-width": "16"
+}

rust-toolchain.toml

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

src/main.rs

@@ -0,0 +1,11 @@
+#![no_std]
+#![no_main]
+
+use panic_halt as _;
+
+use embassy_executor::Spawner;
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    loop {}
+}