embassy/embassy-stm32/build.rs
2021-11-11 11:34:09 +01:00

124 lines
3.8 KiB
Rust

use std::collections::HashMap;
use std::env;
use std::fs;
use std::path::PathBuf;
fn main() {
let chip_name = env::vars_os()
.map(|(a, _)| a.to_string_lossy().to_string())
.find(|x| x.starts_with("CARGO_FEATURE_STM32"))
.expect("No stm32xx Cargo feature enabled")
.strip_prefix("CARGO_FEATURE_")
.unwrap()
.to_ascii_lowercase();
struct Peripheral {
kind: String,
name: String,
version: String,
}
let mut peripheral_version_mapping = HashMap::<String, String>::new();
stm32_metapac::peripheral_versions!(
($peri:ident, $version:ident) => {
peripheral_version_mapping.insert(stringify!($peri).to_string(), stringify!($version).to_string());
println!("cargo:rustc-cfg={}", stringify!($peri));
println!("cargo:rustc-cfg={}_{}", stringify!($peri), stringify!($version));
};
);
let mut peripherals: Vec<Peripheral> = Vec::new();
stm32_metapac::peripherals!(
($kind:ident, $name:ident) => {
peripherals.push(Peripheral{
kind: stringify!($kind).to_string(),
name: stringify!($name).to_string(),
version: peripheral_version_mapping[&stringify!($kind).to_ascii_lowercase()].clone()
});
};
);
let mut singletons: Vec<String> = Vec::new();
for p in peripherals {
match p.kind.as_str() {
// Generate singletons per pin, not per port
"gpio" => {
println!("{}", p.name);
let port_letter = p.name.strip_prefix("GPIO").unwrap();
for pin_num in 0..16 {
singletons.push(format!("P{}{}", port_letter, pin_num));
}
}
// No singleton for these, the HAL handles them specially.
"exti" => {}
// We *shouldn't* have singletons for these, but the HAL currently requires
// singletons, for using with RccPeripheral to enable/disable clocks to them.
"rcc" => {
if p.version == "h7" {
singletons.push("MCO1".to_string());
singletons.push("MCO2".to_string());
}
singletons.push(p.name.clone());
}
//"dbgmcu" => {}
//"syscfg" => {}
//"dma" => {}
//"bdma" => {}
//"dmamux" => {}
// For other peripherals, one singleton per peri
_ => singletons.push(p.name.clone()),
}
}
// One singleton per EXTI line
for pin_num in 0..16 {
singletons.push(format!("EXTI{}", pin_num));
}
// One singleton per DMA channel
stm32_metapac::dma_channels! {
($channel_peri:ident, $dma_peri:ident, $version:ident, $channel_num:expr, $ignore:tt) => {
singletons.push(stringify!($channel_peri).to_string());
};
}
let out_dir = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
let out_file = out_dir.join("generated.rs").to_string_lossy().to_string();
fs::write(
out_file,
format!(
"embassy_hal_common::peripherals!({});",
singletons.join(",")
),
)
.unwrap();
let mut s = chip_name.split('_');
let mut chip_name: String = s.next().unwrap().to_string();
let core_name = if let Some(c) = s.next() {
if !c.starts_with("CM") {
chip_name.push('_');
chip_name.push_str(c);
None
} else {
Some(c)
}
} else {
None
};
if let Some(core) = core_name {
println!(
"cargo:rustc-cfg={}_{}",
&chip_name[..chip_name.len() - 2],
core
);
} else {
println!("cargo:rustc-cfg={}", &chip_name[..chip_name.len() - 2]);
}
println!("cargo:rerun-if-changed=build.rs");
}