embassy/embassy-stm32/build.rs
2022-02-08 01:46:32 +02:00

262 lines
8.0 KiB
Rust

use std::collections::HashMap;
use std::env;
use std::fmt::Write;
use std::fs;
use std::path::PathBuf;
fn main() {
let chip_name = match env::vars()
.map(|(a, _)| a)
.filter(|x| x.starts_with("CARGO_FEATURE_STM32"))
.get_one()
{
Ok(x) => x,
Err(GetOneError::None) => panic!("No stm32xx Cargo feature enabled"),
Err(GetOneError::Multiple) => panic!("Multiple stm32xx Cargo features 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()
});
};
);
// ========
// Generate singletons
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 mut generated = String::new();
write!(
&mut generated,
"embassy_hal_common::peripherals!({});\n",
singletons.join(",")
)
.unwrap();
// ========
// Generate DMA IRQs.
// This can't be done with macrotables alone because in many chips, one irq is shared between many
// channels, so we have to deduplicate them.
#[allow(unused_mut)]
let mut dma_irqs: Vec<String> = Vec::new();
#[allow(unused_mut)]
let mut bdma_irqs: Vec<String> = Vec::new();
stm32_metapac::interrupts! {
($peri:ident, dma, $block:ident, $signal_name:ident, $irq:ident) => {
dma_irqs.push(stringify!($irq).to_string());
};
($peri:ident, bdma, $block:ident, $signal_name:ident, $irq:ident) => {
bdma_irqs.push(stringify!($irq).to_string());
};
}
dma_irqs.sort();
dma_irqs.dedup();
bdma_irqs.sort();
bdma_irqs.dedup();
for irq in dma_irqs {
write!(
&mut generated,
"#[crate::interrupt] unsafe fn {} () {{ crate::dma::dma::on_irq(); }}\n",
irq
)
.unwrap();
}
for irq in bdma_irqs {
write!(
&mut generated,
"#[crate::interrupt] unsafe fn {} () {{ crate::dma::bdma::on_irq(); }}\n",
irq
)
.unwrap();
}
// ========
// Write generated.rs
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, &generated).unwrap();
// ========
// Multicore
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]);
}
// ========
// stm32f3 wildcard features used in RCC
if chip_name.starts_with("stm32f3") {
println!("cargo:rustc-cfg={}x{}", &chip_name[..9], &chip_name[10..11]);
}
// =======
// Features for targeting groups of chips
println!("cargo:rustc-cfg={}", &chip_name[..7]); // stm32f4
println!("cargo:rustc-cfg={}", &chip_name[..9]); // stm32f429
println!("cargo:rustc-cfg={}x", &chip_name[..8]); // stm32f42x
println!("cargo:rustc-cfg={}x{}", &chip_name[..7], &chip_name[8..9]); // stm32f4x9
// ========
// Handle time-driver-XXXX features.
let time_driver = match env::vars()
.map(|(a, _)| a)
.filter(|x| x.starts_with("CARGO_FEATURE_TIME_DRIVER_"))
.get_one()
{
Ok(x) => Some(
x.strip_prefix("CARGO_FEATURE_TIME_DRIVER_")
.unwrap()
.to_ascii_lowercase(),
),
Err(GetOneError::None) => None,
Err(GetOneError::Multiple) => panic!("Multiple stm32xx Cargo features enabled"),
};
match time_driver.as_ref().map(|x| x.as_ref()) {
None => {}
Some("tim2") => println!("cargo:rustc-cfg=time_driver_tim2"),
Some("tim3") => println!("cargo:rustc-cfg=time_driver_tim3"),
Some("tim4") => println!("cargo:rustc-cfg=time_driver_tim4"),
Some("tim5") => println!("cargo:rustc-cfg=time_driver_tim5"),
Some("any") => {
if singletons.contains(&"TIM2".to_string()) {
println!("cargo:rustc-cfg=time_driver_tim2");
} else if singletons.contains(&"TIM3".to_string()) {
println!("cargo:rustc-cfg=time_driver_tim3");
} else if singletons.contains(&"TIM4".to_string()) {
println!("cargo:rustc-cfg=time_driver_tim4");
} else if singletons.contains(&"TIM5".to_string()) {
println!("cargo:rustc-cfg=time_driver_tim5");
} else {
panic!("time-driver-any requested, but the chip doesn't have TIM2, TIM3, TIM4 or TIM5.")
}
}
_ => panic!("unknown time_driver {:?}", time_driver),
}
// Handle time-driver-XXXX features.
if env::var("CARGO_FEATURE_TIME_DRIVER_ANY").is_ok() {}
println!("cargo:rustc-cfg={}", &chip_name[..chip_name.len() - 2]);
println!("cargo:rerun-if-changed=build.rs");
}
enum GetOneError {
None,
Multiple,
}
trait IteratorExt: Iterator {
fn get_one(self) -> Result<Self::Item, GetOneError>;
}
impl<T: Iterator> IteratorExt for T {
fn get_one(mut self) -> Result<Self::Item, GetOneError> {
match self.next() {
None => Err(GetOneError::None),
Some(res) => match self.next() {
Some(_) => Err(GetOneError::Multiple),
None => Ok(res),
},
}
}
}