diff --git a/tests/stm32/Cargo.toml b/tests/stm32/Cargo.toml index 5cd949661..83bf1e9c9 100644 --- a/tests/stm32/Cargo.toml +++ b/tests/stm32/Cargo.toml @@ -3,6 +3,7 @@ edition = "2021" name = "embassy-stm32-tests" version = "0.1.0" license = "MIT OR Apache-2.0" +autobins = false [features] stm32f103c8 = ["embassy-stm32/stm32f103c8", "not-gpdma"] # Blue Pill diff --git a/tests/stm32/build.rs b/tests/stm32/build.rs index 3e67a7392..4c76a8eeb 100644 --- a/tests/stm32/build.rs +++ b/tests/stm32/build.rs @@ -6,15 +6,16 @@ fn main() -> Result<(), Box> { let out = PathBuf::from(env::var("OUT_DIR").unwrap()); fs::write(out.join("link_ram.x"), include_bytes!("link_ram.x")).unwrap(); println!("cargo:rustc-link-search={}", out.display()); - println!("cargo:rerun-if-changed=link_ram.x"); - println!("cargo:rustc-link-arg-bins=--nmagic"); // too little RAM to run from RAM. - #[cfg(any(feature = "stm32c031c6"))] - println!("cargo:rustc-link-arg-bins=-Tlink.x"); - #[cfg(not(any(feature = "stm32c031c6")))] - println!("cargo:rustc-link-arg-bins=-Tlink_ram.x"); + if cfg!(any(feature = "stm32c031c6")) { + println!("cargo:rustc-link-arg-bins=-Tlink.x"); + println!("cargo:rerun-if-changed=link.x"); + } else { + println!("cargo:rustc-link-arg-bins=-Tlink_ram.x"); + println!("cargo:rerun-if-changed=link_ram.x"); + } println!("cargo:rustc-link-arg-bins=-Tdefmt.x"); diff --git a/tests/stm32/src/bin/usart.rs b/tests/stm32/src/bin/usart.rs index cca8c42ee..bda2ce9c2 100644 --- a/tests/stm32/src/bin/usart.rs +++ b/tests/stm32/src/bin/usart.rs @@ -9,6 +9,7 @@ use embassy_executor::Spawner; use embassy_stm32::dma::NoDma; use embassy_stm32::interrupt; use embassy_stm32::usart::{Config, Uart}; +use embassy_time::{Duration, Instant}; use example_common::*; #[embassy_executor::main] @@ -19,36 +20,76 @@ async fn main(_spawner: Spawner) { // Arduino pins D0 and D1 // They're connected together with a 1K resistor. #[cfg(feature = "stm32f103c8")] - let (tx, rx, usart, irq) = (p.PA9, p.PA10, p.USART1, interrupt::take!(USART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PA9, p.PA10, p.USART1, interrupt::take!(USART1)); #[cfg(feature = "stm32g491re")] - let (tx, rx, usart, irq) = (p.PC4, p.PC5, p.USART1, interrupt::take!(USART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PC4, p.PC5, p.USART1, interrupt::take!(USART1)); #[cfg(feature = "stm32g071rb")] - let (tx, rx, usart, irq) = (p.PC4, p.PC5, p.USART1, interrupt::take!(USART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PC4, p.PC5, p.USART1, interrupt::take!(USART1)); #[cfg(feature = "stm32f429zi")] - let (tx, rx, usart, irq) = (p.PG14, p.PG9, p.USART6, interrupt::take!(USART6)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PG14, p.PG9, p.USART6, interrupt::take!(USART6)); #[cfg(feature = "stm32wb55rg")] - let (tx, rx, usart, irq) = (p.PA2, p.PA3, p.LPUART1, interrupt::take!(LPUART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PA2, p.PA3, p.LPUART1, interrupt::take!(LPUART1)); #[cfg(feature = "stm32h755zi")] - let (tx, rx, usart, irq) = (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1)); #[cfg(feature = "stm32u585ai")] - let (tx, rx, usart, irq) = (p.PD8, p.PD9, p.USART3, interrupt::take!(USART3)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PD8, p.PD9, p.USART3, interrupt::take!(USART3)); #[cfg(feature = "stm32h563zi")] - let (tx, rx, usart, irq) = (p.PB6, p.PB7, p.LPUART1, interrupt::take!(LPUART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PB6, p.PB7, p.LPUART1, interrupt::take!(LPUART1)); #[cfg(feature = "stm32c031c6")] - let (tx, rx, usart, irq) = (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1)); + let (mut tx, mut rx, mut usart, mut irq) = (p.PB6, p.PB7, p.USART1, interrupt::take!(USART1)); - let config = Config::default(); - let mut usart = Uart::new(usart, rx, tx, irq, NoDma, NoDma, config); + { + let config = Config::default(); + let mut usart = Uart::new(&mut usart, &mut rx, &mut tx, &mut irq, NoDma, NoDma, config); - // We can't send too many bytes, they have to fit in the FIFO. - // This is because we aren't sending+receiving at the same time. + // We can't send too many bytes, they have to fit in the FIFO. + // This is because we aren't sending+receiving at the same time. - let data = [0xC0, 0xDE]; - usart.blocking_write(&data).unwrap(); + let data = [0xC0, 0xDE]; + usart.blocking_write(&data).unwrap(); - let mut buf = [0; 2]; - usart.blocking_read(&mut buf).unwrap(); - assert_eq!(buf, data); + let mut buf = [0; 2]; + usart.blocking_read(&mut buf).unwrap(); + assert_eq!(buf, data); + } + + // Test that baudrate divider is calculated correctly. + // Do it by comparing the time it takes to send a known number of bytes. + for baudrate in [ + 300, + 9600, + 115200, + 250_000, + 337_934, + #[cfg(not(feature = "stm32f103c8"))] + 1_000_000, + #[cfg(not(feature = "stm32f103c8"))] + 2_000_000, + ] { + info!("testing baudrate {}", baudrate); + + let mut config = Config::default(); + config.baudrate = baudrate; + let mut usart = Uart::new(&mut usart, &mut rx, &mut tx, &mut irq, NoDma, NoDma, config); + + let n = (baudrate as usize / 100).max(64); + + let start = Instant::now(); + for _ in 0..n { + usart.blocking_write(&[0x00]).unwrap(); + } + let dur = Instant::now() - start; + let want_dur = Duration::from_micros(n as u64 * 10 * 1_000_000 / (baudrate as u64)); + let fuzz = want_dur / 5; + if dur < want_dur - fuzz || dur > want_dur + fuzz { + defmt::panic!( + "bad duration for baudrate {}: got {:?} want {:?}", + baudrate, + dur, + want_dur + ); + } + } info!("Test OK"); cortex_m::asm::bkpt(); diff --git a/tests/stm32/src/example_common.rs b/tests/stm32/src/example_common.rs index a4f8668c7..3d150da60 100644 --- a/tests/stm32/src/example_common.rs +++ b/tests/stm32/src/example_common.rs @@ -16,5 +16,10 @@ pub fn config() -> Config { config.rcc.pll1.q_ck = Some(Hertz(100_000_000)); } + #[cfg(feature = "stm32u585ai")] + { + config.rcc.mux = embassy_stm32::rcc::ClockSrc::MSI(embassy_stm32::rcc::MSIRange::Range48mhz); + } + config }