61 lines
2.2 KiB
Rust
61 lines
2.2 KiB
Rust
//! This build script copies the `memory.x` file from the crate root into
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//! a directory where the linker can always find it at build time.
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//! For many projects this is optional, as the linker always searches the
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//! project root directory -- wherever `Cargo.toml` is. However, if you
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//! are using a workspace or have a more complicated build setup, this
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//! build script becomes required. Additionally, by requesting that
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//! Cargo re-run the build script whenever `memory.x` is changed,
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//! updating `memory.x` ensures a rebuild of the application with the
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//! new memory settings.
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use std::fs::File;
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use std::io::Write;
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use std::path::PathBuf;
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use std::{env, fs};
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use tangentbord1::layer::Layer;
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fn main() {
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memory();
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serialize_layout("./layers.ron", "./src/layers.pc");
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}
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fn memory() {
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// Put `memory.x` in our output directory and ensure it's
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// on the linker search path.
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let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
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File::create(out.join("memory.x"))
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.unwrap()
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.write_all(include_bytes!("../memory.x"))
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.unwrap();
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println!("cargo:rustc-link-search={}", out.display());
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// By default, Cargo will re-run a build script whenever
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// any file in the project changes. By specifying `memory.x`
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// here, we ensure the build script is only re-run when
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// `memory.x` is changed.
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println!("cargo:rerun-if-changed=../memory.x");
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// --nmagic turns off page alignment of sections (which saves flash space)
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println!("cargo:rustc-link-arg-bins=--nmagic");
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println!("cargo:rustc-link-arg-bins=-Tlink.x");
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println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
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//println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
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}
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fn serialize_layout(ron_path: &str, postcard_path: &str) {
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println!("cargo:rerun-if-changed={ron_path}");
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println!("cargo:rerun-if-changed={postcard_path}");
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let layers = fs::read_to_string(ron_path).expect("Failed to read .ron");
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let layers: Vec<Vec<Layer>> = ron::from_str(&layers).expect("Failed to deserialize .ron");
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let serialized = postcard::to_stdvec(&layers).expect("Failed to serialize layers");
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File::create(postcard_path)
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.expect("Failed to create .pc")
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.write_all(&serialized)
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.expect("Failed to write .pc");
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}
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