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, } let mut peripherals: Vec = Vec::new(); stm32_metapac::peripherals!( ($kind:ident, $name:ident) => { peripherals.push(Peripheral{ kind: stringify!($kind).to_string(), name: stringify!($name).to_string(), }); }; ); let mut singletons: Vec = Vec::new(); for p in peripherals { match p.kind.as_str() { // Generate singletons per pin, not per port "gpio" => { println!("{}", p.name); let port_letter = p.name.strip_prefix("GPIO").unwrap(); for pin_num in 0..16 { singletons.push(format!("P{}{}", port_letter, pin_num)); } } // No singleton for these, the HAL handles them specially. "exti" => {} // We *shouldn't* have singletons for these, but the HAL currently requires // singletons, for using with RccPeripheral to enable/disable clocks to them. //"rcc" => {} //"dbgmcu" => {} //"syscfg" => {} //"dma" => {} //"bdma" => {} //"dmamux" => {} // For other peripherals, one singleton per peri _ => singletons.push(p.name.clone()), } } // One singleton per EXTI line for pin_num in 0..16 { singletons.push(format!("EXTI{}", pin_num)); } // One singleton per DMA channel stm32_metapac::dma_channels! { ($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(); stm32_metapac::peripheral_versions!( ($peri:ident, $version:ident) => { println!("cargo:rustc-cfg={}", stringify!($peri)); println!("cargo:rustc-cfg={}_{}", stringify!($peri), stringify!($version)); }; ); let mut chip_and_core = chip_name.split('_'); let chip = chip_and_core.next().expect("Unexpected stm32xx feature"); if let Some(core) = chip_and_core.next() { println!("cargo:rustc-cfg={}_{}", &chip[..(chip.len() - 2)], core); } else { println!("cargo:rustc-cfg={}", &chip[..(chip.len() - 2)]); } println!("cargo:rerun-if-changed=build.rs"); println!("cargo:rerun-if-changed=gen.py"); }