Initial init

build.rs

@@ -0,0 +1,86 @@
+//! 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.
+//!
+//! The build script also sets the linker flags to tell it which link script to use.
+
+use const_gen::*;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use std::{env, fs};
+use xz2::read::XzEncoder;
+
+fn main() {
+    // Generate vial config at the root of project
+    println!("cargo:rerun-if-changed=vial.json");
+    println!("cargo:rerun-if-changed=keyboard.toml");
+
+    generate_vial_config();
+
+    // 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");
+
+    // Specify linker arguments.
+
+    // `--nmagic` is required if memory section addresses are not aligned to 0x10000,
+    // for example the FLASH and RAM sections in your `memory.x`.
+    // See https://github.com/rust-embedded/cortex-m-quickstart/pull/95
+    println!("cargo:rustc-link-arg=--nmagic");
+
+    // Set the linker script to the one provided by cortex-m-rt.
+    println!("cargo:rustc-link-arg=-Tlink.x");
+
+    // Set the linker script of the defmt
+    println!("cargo:rustc-link-arg=-Tdefmt.x");
+
+    println!("cargo:rustc-linker=flip-link");
+}
+
+fn generate_vial_config() {
+    // Generated vial config file
+    let out_file = Path::new(&env::var_os("OUT_DIR").unwrap()).join("config_generated.rs");
+
+    let p = Path::new("vial.json");
+    let mut content = String::new();
+    match File::open(p) {
+        Ok(mut file) => {
+            file.read_to_string(&mut content)
+                .expect("Cannot read vial.json");
+        }
+        Err(e) => println!("Cannot find vial.json {:?}: {}", p, e),
+    };
+
+    let vial_cfg = json::stringify(json::parse(&content).unwrap());
+    let mut keyboard_def_compressed: Vec<u8> = Vec::new();
+    XzEncoder::new(vial_cfg.as_bytes(), 6)
+        .read_to_end(&mut keyboard_def_compressed)
+        .unwrap();
+
+    let keyboard_id: Vec<u8> = vec![0xB9, 0xBC, 0x09, 0xB2, 0x9D, 0x37, 0x4C, 0xEA];
+    let const_declarations = [
+        const_declaration!(pub VIAL_KEYBOARD_DEF = keyboard_def_compressed),
+        const_declaration!(pub VIAL_KEYBOARD_ID = keyboard_id),
+    ]
+    .map(|s| "#[allow(clippy::redundant_static_lifetimes)]\n".to_owned() + s.as_str())
+    .join("\n");
+    fs::write(out_file, const_declarations).unwrap();
+}