stuff

right/build.rs

@@ -0,0 +1,59 @@
+//! 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::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+use std::{env, fs};
+
+use tgnt::layer::Layer;
+
+fn main() {
+    memory();
+    serialize_layout("./layers.ron", "./src/layers.pc");
+}
+
+fn memory() {
+    // 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");
+
+    // --nmagic turns off page alignment of sections (which saves flash space)
+    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");
+}
+
+fn serialize_layout(ron_path: &str, postcard_path: &str) {
+    println!("cargo:rerun-if-changed={ron_path}");
+
+    let layers = fs::read_to_string(ron_path).expect("Failed to read .ron");
+    let layers: Vec<Layer> = ron::from_str(&layers).expect("Failed to deserialize .ron");
+
+    let serialized = postcard::to_stdvec(&layers).expect("Failed to serialize layers");
+
+    File::create(postcard_path)
+        .expect("Failed to create .pc")
+        .write_all(&serialized)
+        .expect("Failed to write .pc");
+}