From 2bb6e93e86af02af97b4fb39197a1d1e87e635b9 Mon Sep 17 00:00:00 2001 From: Dario Nieuwenhuis Date: Tue, 2 May 2023 02:52:37 +0200 Subject: stm32/usart: add baudrate calc test. --- tests/stm32/src/bin/usart.rs | 77 ++++++++++++++++++++++++++++++--------- tests/stm32/src/example_common.rs | 5 +++ 2 files changed, 64 insertions(+), 18 deletions(-) (limited to 'tests/stm32/src') 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 } -- cgit From 1078f6f4e7c8473013c46543663cb6ca6b0e0c3d Mon Sep 17 00:00:00 2001 From: Dario Nieuwenhuis Date: Tue, 2 May 2023 19:35:02 +0200 Subject: stm32/test: workaround #1426 --- tests/stm32/src/bin/usart_dma.rs | 3 +++ tests/stm32/src/bin/usart_rx_ringbuffered.rs | 7 +++++-- 2 files changed, 8 insertions(+), 2 deletions(-) (limited to 'tests/stm32/src') diff --git a/tests/stm32/src/bin/usart_dma.rs b/tests/stm32/src/bin/usart_dma.rs index de6cd41d1..62444f0a8 100644 --- a/tests/stm32/src/bin/usart_dma.rs +++ b/tests/stm32/src/bin/usart_dma.rs @@ -94,6 +94,9 @@ async fn main(_spawner: Spawner) { let rx_fut = async { rx.read(&mut rx_buf).await.unwrap(); }; + + // note: rx needs to be polled first, to workaround this bug: + // https://github.com/embassy-rs/embassy/issues/1426 join(rx_fut, tx_fut).await; assert_eq!(tx_buf, rx_buf); diff --git a/tests/stm32/src/bin/usart_rx_ringbuffered.rs b/tests/stm32/src/bin/usart_rx_ringbuffered.rs index 2c4a8fdf4..9d75dbe55 100644 --- a/tests/stm32/src/bin/usart_rx_ringbuffered.rs +++ b/tests/stm32/src/bin/usart_rx_ringbuffered.rs @@ -145,13 +145,16 @@ async fn main(spawner: Spawner) { #[embassy_executor::task] async fn transmit_task(mut tx: UartTx<'static, board::Uart, board::TxDma>) { + // workaround https://github.com/embassy-rs/embassy/issues/1426 + Timer::after(Duration::from_millis(100) as _).await; + let mut rng = ChaCha8Rng::seed_from_u64(1337); info!("Starting random transmissions into void..."); let mut i: u8 = 0; loop { - let mut buf = [0; 32]; + let mut buf = [0; 256]; let len = 1 + (rng.next_u32() as usize % buf.len()); for b in &mut buf[..len] { *b = i; @@ -172,7 +175,7 @@ async fn receive_task(mut rx: RingBufferedUartRx<'static, board::Uart, board::Rx let mut i = 0; let mut expected = 0; loop { - let mut buf = [0; 100]; + let mut buf = [0; 256]; let max_len = 1 + (rng.next_u32() as usize % buf.len()); let received = match rx.read(&mut buf[..max_len]).await { Ok(r) => r, -- cgit From 433422b9f2b08d4bf9f2cef4ded37c14914db157 Mon Sep 17 00:00:00 2001 From: Dario Nieuwenhuis Date: Tue, 2 May 2023 19:35:32 +0200 Subject: stm32/test: remove adsfa --- tests/stm32/src/bin/spi.rs | 1 - 1 file changed, 1 deletion(-) (limited to 'tests/stm32/src') diff --git a/tests/stm32/src/bin/spi.rs b/tests/stm32/src/bin/spi.rs index 0f5e563b1..a87ac3237 100644 --- a/tests/stm32/src/bin/spi.rs +++ b/tests/stm32/src/bin/spi.rs @@ -35,7 +35,6 @@ async fn main(_spawner: Spawner) { #[cfg(feature = "stm32c031c6")] let (spi, sck, mosi, miso) = (p.SPI1, p.PA5, p.PA7, p.PA6); - info!("asdfa;"); let mut spi = Spi::new( spi, sck, // Arduino D13 -- cgit