From 9a57deef9b531b8dae9d98a5accf5aeb128ab86d Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Tue, 22 Sep 2020 18:03:43 +0200
Subject: First commit

---
 examples/src/bin/uart.rs | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 examples/src/bin/uart.rs

(limited to 'examples/src/bin/uart.rs')

diff --git a/examples/src/bin/uart.rs b/examples/src/bin/uart.rs
new file mode 100644
index 000000000..21e26e3ad
--- /dev/null
+++ b/examples/src/bin/uart.rs
@@ -0,0 +1,72 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use example_common::*;
+
+use cortex_m_rt::entry;
+use embassy::io::{AsyncBufRead, AsyncBufReadExt, AsyncWrite, AsyncWriteExt};
+use embassy_nrf::uarte;
+use futures::pin_mut;
+use nrf52840_hal::gpio;
+
+#[static_executor::task]
+async fn run() {
+    let p = embassy_nrf::pac::Peripherals::take().dewrap();
+
+    let port0 = gpio::p0::Parts::new(p.P0);
+
+    let pins = uarte::Pins {
+        rxd: port0.p0_08.into_floating_input().degrade(),
+        txd: port0
+            .p0_06
+            .into_push_pull_output(gpio::Level::Low)
+            .degrade(),
+        cts: None,
+        rts: None,
+    };
+
+    let u = uarte::Uarte::new(
+        p.UARTE0,
+        pins,
+        uarte::Parity::EXCLUDED,
+        uarte::Baudrate::BAUD115200,
+    );
+    pin_mut!(u);
+
+    info!("uarte initialized!");
+
+    u.write_all(b"Hello!\r\n").await.dewrap();
+    info!("wrote hello in uart!");
+
+    // Simple demo, reading 8-char chunks and echoing them back reversed.
+    loop {
+        info!("reading...");
+        let mut buf = [0u8; 8];
+        u.read_exact(&mut buf).await.dewrap();
+        info!("read done, got {:[u8]}", buf);
+
+        // Reverse buf
+        for i in 0..4 {
+            let tmp = buf[i];
+            buf[i] = buf[7 - i];
+            buf[7 - i] = tmp;
+        }
+
+        info!("writing...");
+        u.write_all(&buf).await.dewrap();
+        info!("write done");
+    }
+}
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    unsafe {
+        run.spawn().dewrap();
+        static_executor::run();
+    }
+}
-- 
cgit