nrf/buffered_uarte: add HIL tests.

tests/nrf/src/bin/buffered_uart.rs

@@ -0,0 +1,74 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::{assert_eq, *};
+use embassy_executor::Spawner;
+use embassy_futures::join::join;
+use embassy_nrf::buffered_uarte::BufferedUarte;
+use embassy_nrf::{interrupt, uarte};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    let mut config = uarte::Config::default();
+    config.parity = uarte::Parity::EXCLUDED;
+    config.baudrate = uarte::Baudrate::BAUD1M;
+
+    let mut tx_buffer = [0u8; 1024];
+    let mut rx_buffer = [0u8; 1024];
+
+    let mut u = BufferedUarte::new(
+        p.UARTE0,
+        p.TIMER0,
+        p.PPI_CH0,
+        p.PPI_CH1,
+        p.PPI_GROUP0,
+        interrupt::take!(UARTE0_UART0),
+        p.P1_03,
+        p.P1_02,
+        config.clone(),
+        &mut rx_buffer,
+        &mut tx_buffer,
+    );
+
+    info!("uarte initialized!");
+
+    let (mut rx, mut tx) = u.split();
+
+    const COUNT: usize = 40_000;
+
+    let tx_fut = async {
+        let mut tx_buf = [0; 215];
+        let mut i = 0;
+        while i < COUNT {
+            let n = tx_buf.len().min(COUNT - i);
+            let tx_buf = &mut tx_buf[..n];
+            for (j, b) in tx_buf.iter_mut().enumerate() {
+                *b = (i + j) as u8;
+            }
+            let n = unwrap!(tx.write(tx_buf).await);
+            i += n;
+        }
+    };
+    let rx_fut = async {
+        let mut i = 0;
+        while i < COUNT {
+            let buf = unwrap!(rx.fill_buf().await);
+
+            for &b in buf {
+                assert_eq!(b, i as u8);
+                i = i + 1;
+            }
+
+            let n = buf.len();
+            rx.consume(n);
+        }
+    };
+
+    join(rx_fut, tx_fut).await;
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}

tests/nrf/src/bin/buffered_uart_spam.rs

@@ -0,0 +1,86 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use core::mem;
+use core::ptr::NonNull;
+
+use defmt::{assert_eq, *};
+use embassy_executor::Spawner;
+use embassy_nrf::buffered_uarte::BufferedUarte;
+use embassy_nrf::gpio::{Level, Output, OutputDrive};
+use embassy_nrf::ppi::{Event, Ppi, Task};
+use embassy_nrf::uarte::Uarte;
+use embassy_nrf::{interrupt, pac, uarte};
+use embassy_time::{Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut p = embassy_nrf::init(Default::default());
+    let mut config = uarte::Config::default();
+    config.parity = uarte::Parity::EXCLUDED;
+    config.baudrate = uarte::Baudrate::BAUD1M;
+
+    let mut tx_buffer = [0u8; 1024];
+    let mut rx_buffer = [0u8; 1024];
+
+    mem::forget(Output::new(&mut p.P1_02, Level::High, OutputDrive::Standard));
+
+    let mut u = BufferedUarte::new(
+        p.UARTE0,
+        p.TIMER0,
+        p.PPI_CH0,
+        p.PPI_CH1,
+        p.PPI_GROUP0,
+        interrupt::take!(UARTE0_UART0),
+        p.P1_03,
+        p.P1_04,
+        config.clone(),
+        &mut rx_buffer,
+        &mut tx_buffer,
+    );
+
+    info!("uarte initialized!");
+
+    // uarte needs some quiet time to start rxing properly.
+    Timer::after(Duration::from_millis(10)).await;
+
+    // Tx spam in a loop.
+    const NSPAM: usize = 17;
+    static mut TX_BUF: [u8; NSPAM] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    let _spam = Uarte::new(p.UARTE1, interrupt::take!(UARTE1), p.P1_01, p.P1_02, config.clone());
+    let spam_peri: pac::UARTE1 = unsafe { mem::transmute(()) };
+    let event = unsafe { Event::new_unchecked(NonNull::new_unchecked(&spam_peri.events_endtx as *const _ as _)) };
+    let task = unsafe { Task::new_unchecked(NonNull::new_unchecked(&spam_peri.tasks_starttx as *const _ as _)) };
+    let mut spam_ppi = Ppi::new_one_to_one(p.PPI_CH2, event, task);
+    spam_ppi.enable();
+    let p = unsafe { TX_BUF.as_mut_ptr() };
+    spam_peri.txd.ptr.write(|w| unsafe { w.ptr().bits(p as u32) });
+    spam_peri.txd.maxcnt.write(|w| unsafe { w.maxcnt().bits(NSPAM as _) });
+    spam_peri.tasks_starttx.write(|w| unsafe { w.bits(1) });
+
+    let mut i = 0;
+    let mut total = 0;
+    while total < 256 * 1024 {
+        let buf = unwrap!(u.fill_buf().await);
+        //info!("rx {}", buf);
+
+        for &b in buf {
+            assert_eq!(b, unsafe { TX_BUF[i] });
+
+            i = i + 1;
+            if i == NSPAM {
+                i = 0;
+            }
+        }
+
+        // Read bytes have to be explicitly consumed, otherwise fill_buf() will return them again
+        let n = buf.len();
+        u.consume(n);
+        total += n;
+    }
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}