use std::collections::HashMap; use std::env; 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::::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 = 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 = 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]); } // ======== // 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; } impl IteratorExt for T { fn get_one(mut self) -> Result { match self.next() { None => Err(GetOneError::None), Some(res) => match self.next() { Some(_) => Err(GetOneError::Multiple), None => Ok(res), }, } } }