98 lines
3 KiB
Rust
98 lines
3 KiB
Rust
use std::env;
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use std::fs;
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use std::path::PathBuf;
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fn main() {
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let chip_name = env::vars_os()
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.map(|(a, _)| a.to_string_lossy().to_string())
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.find(|x| x.starts_with("CARGO_FEATURE_STM32"))
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.expect("No stm32xx Cargo feature enabled")
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.strip_prefix("CARGO_FEATURE_")
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.unwrap()
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.to_ascii_lowercase();
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struct Peripheral {
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kind: String,
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name: String,
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}
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let mut peripherals: Vec<Peripheral> = Vec::new();
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stm32_metapac::peripherals!(
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($kind:ident, $name:ident) => {
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peripherals.push(Peripheral{
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kind: stringify!($kind).to_string(),
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name: stringify!($name).to_string(),
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});
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};
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);
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let mut singletons: Vec<String> = Vec::new();
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for p in peripherals {
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match p.kind.as_str() {
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// Generate singletons per pin, not per port
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"gpio" => {
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println!("{}", p.name);
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let port_letter = p.name.strip_prefix("GPIO").unwrap();
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for pin_num in 0..16 {
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singletons.push(format!("P{}{}", port_letter, pin_num));
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}
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}
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// No singleton for these, the HAL handles them specially.
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"exti" => {}
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// We *shouldn't* have singletons for these, but the HAL currently requires
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// singletons, for using with RccPeripheral to enable/disable clocks to them.
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//"rcc" => {}
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//"dbgmcu" => {}
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//"syscfg" => {}
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//"dma" => {}
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//"bdma" => {}
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//"dmamux" => {}
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// For other peripherals, one singleton per peri
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_ => singletons.push(p.name.clone()),
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}
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}
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// One singleton per EXTI line
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for pin_num in 0..16 {
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singletons.push(format!("EXTI{}", pin_num));
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}
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// One singleton per DMA channel
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stm32_metapac::dma_channels! {
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($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, $ignore:tt) => {
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singletons.push(stringify!($channel_peri).to_string());
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};
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}
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let out_dir = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
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let out_file = out_dir.join("generated.rs").to_string_lossy().to_string();
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fs::write(
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out_file,
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format!(
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"embassy_hal_common::peripherals!({});",
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singletons.join(",")
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),
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)
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.unwrap();
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stm32_metapac::peripheral_versions!(
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($peri:ident, $version:ident) => {
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println!("cargo:rustc-cfg={}", stringify!($peri));
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println!("cargo:rustc-cfg={}_{}", stringify!($peri), stringify!($version));
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};
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);
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let mut chip_and_core = chip_name.split('_');
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let chip = chip_and_core.next().expect("Unexpected stm32xx feature");
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if let Some(core) = chip_and_core.next() {
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println!("cargo:rustc-cfg={}_{}", &chip[..(chip.len() - 2)], core);
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} else {
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println!("cargo:rustc-cfg={}", &chip[..(chip.len() - 2)]);
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}
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println!("cargo:rerun-if-changed=build.rs");
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}
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