feat(neopixel): first commit

neopixel_macros/Cargo.lock

@@ -0,0 +1,46 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "neopixel_macros"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.58"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a210d160f08b701c8721ba1c726c11662f877ea6b7094007e1ca9a1041945034"

neopixel_macros/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "neopixel_macros"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc_macro = true
+
+[dependencies]
+syn = "2.0.58"
+
+[build-dependencies.proc-macro2]
+version = "=1.0.79"

neopixel_macros/rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "nightly-2024-03-22"
+components = [ "rust-src" ]
+profile = "complete"

neopixel_macros/src/lib.rs

@@ -0,0 +1,54 @@
+#![feature(proc_macro_quote)]
+#![no_std]
+
+use core::str::FromStr;
+
+extern crate alloc;
+
+use alloc::string::ToString;
+use proc_macro::{quote, TokenStream};
+use syn::parse;
+
+#[proc_macro]
+pub fn impl_static_pin(pin: TokenStream) -> TokenStream {
+    let parsing_result = parse::<syn::Ident>(pin.clone());
+
+    if let Ok(ident) = parsing_result {
+        let pin = TokenStream::from_str(ident.to_string().as_str()).unwrap();
+        let mut identifier = ident.to_string();
+        identifier.insert_str(1, "ORT");
+
+        let pin_num = identifier.pop().unwrap();
+
+        if pin_num.is_ascii_digit() {
+            let pin_num = TokenStream::from_str(&pin_num.to_string()).unwrap();
+
+            let port_field = TokenStream::from_str(&identifier.to_ascii_lowercase()).unwrap();
+
+            let port_ident = TokenStream::from_str(identifier.as_str()).unwrap();
+            let trait_ident = TokenStream::from_str("StaticPin").unwrap();
+
+            quote! {
+                impl $trait_ident for $pin {
+                    type Port = $port_ident;
+                    const PIN_NUM: u8 = $pin_num;
+
+                    fn write(data: u8) {
+                        unsafe {
+                            (*Self::Port::ptr())
+                                .$port_field
+                                .write(|w| w.bits(data));
+                        }
+                    }
+                    fn read() -> u8 {
+                        unsafe { (*Self::Port::ptr()).$port_field.read().bits() }
+                    }
+                }
+            }
+        } else {
+            unreachable!()
+        }
+    } else {
+        unreachable!()
+    }
+}