nrf/uart: add buffereduart drop, rxonly, txonly tests.

tests/nrf52840/src/bin/buffered_uart.rs

@@ -15,7 +15,7 @@ bind_interrupts!(struct Irqs {
 
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let p = embassy_nrf::init(Default::default());
+    let mut p = embassy_nrf::init(Default::default());
     let mut config = uarte::Config::default();
     config.parity = uarte::Parity::EXCLUDED;
     config.baudrate = uarte::Baudrate::BAUD1M;
@@ -23,15 +23,17 @@ async fn main(_spawner: Spawner) {
     let mut tx_buffer = [0u8; 1024];
     let mut rx_buffer = [0u8; 1024];
 
+    // test teardown + recreate of the buffereduarte works fine.
+    for _ in 0..2 {
         let u = BufferedUarte::new(
-        p.UARTE0,
+            &mut p.UARTE0,
-        p.TIMER0,
+            &mut p.TIMER0,
-        p.PPI_CH0,
+            &mut p.PPI_CH0,
-        p.PPI_CH1,
+            &mut p.PPI_CH1,
-        p.PPI_GROUP0,
+            &mut p.PPI_GROUP0,
             Irqs,
-        p.P1_03,
+            &mut p.P1_03,
-        p.P1_02,
+            &mut p.P1_02,
             config.clone(),
             &mut rx_buffer,
             &mut tx_buffer,
@@ -72,6 +74,7 @@ async fn main(_spawner: Spawner) {
         };
 
         join(rx_fut, tx_fut).await;
+    }
 
     info!("Test OK");
     cortex_m::asm::bkpt();

tests/nrf52840/src/bin/buffered_uart_halves.rs

@@ -0,0 +1,82 @@
+#![no_std]
+#![no_main]
+teleprobe_meta::target!(b"nrf52840-dk");
+
+use defmt::{assert_eq, *};
+use embassy_executor::Spawner;
+use embassy_futures::join::join;
+use embassy_nrf::buffered_uarte::{self, BufferedUarteRx, BufferedUarteTx};
+use embassy_nrf::{bind_interrupts, peripherals, uarte};
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    UARTE0_UART0 => buffered_uarte::InterruptHandler<peripherals::UARTE0>;
+    UARTE1 => buffered_uarte::InterruptHandler<peripherals::UARTE1>;
+});
+
+#[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];
+
+    // test teardown + recreate of the buffereduarte works fine.
+    for _ in 0..2 {
+        const COUNT: usize = 40_000;
+
+        let mut tx = BufferedUarteTx::new(&mut p.UARTE1, Irqs, &mut p.P1_02, config.clone(), &mut tx_buffer);
+
+        let mut rx = BufferedUarteRx::new(
+            &mut p.UARTE0,
+            &mut p.TIMER0,
+            &mut p.PPI_CH0,
+            &mut p.PPI_CH1,
+            &mut p.PPI_GROUP0,
+            Irqs,
+            &mut p.P1_03,
+            config.clone(),
+            &mut rx_buffer,
+        );
+
+        let tx_fut = async {
+            info!("tx initialized!");
+
+            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 {
+            info!("rx initialized!");
+
+            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();
+}