Add HIL test for bufferedUart

tests/rp/src/bin/uart_buffered.rs

@@ -0,0 +1,37 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::{assert_eq, *};
+use embassy_executor::Spawner;
+use embassy_rp::interrupt;
+use embassy_rp::uart::{BufferedUart, Config, State, Uart};
+use embedded_io::asynch::{Read, Write};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    info!("Hello World!");
+
+    let (tx, rx, uart) = (p.PIN_0, p.PIN_1, p.UART0);
+
+    let config = Config::default();
+    let uart = Uart::new_blocking(uart, tx, rx, config);
+
+    let irq = interrupt::take!(UART0_IRQ);
+    let tx_buf = &mut [0u8; 32];
+    let rx_buf = &mut [0u8; 32];
+    let mut state = State::new();
+    let mut uart = BufferedUart::new(&mut state, uart, irq, tx_buf, rx_buf);
+
+    let data = [0xC0, 0xDE];
+    uart.write(&data).await.unwrap();
+
+    let mut buf = [0; 2];
+    uart.read(&mut buf).await.unwrap();
+    assert_eq!(buf, data);
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}