Merge #1149

1149: Add samples for nrf5340 r=lulf a=Tiwalun

Samples for the nrf5340, copied from the existing nrf samples.

Not sure if copying them is the best way of adding support, or using features in the existing samples would be better?
The code is mostly the same, with some different peripherals and pin mappings for the DK.

Co-authored-by: Dominik Boehi <[email protected]>

62 files changed, 237 insertions, 0 deletions

diff --git a/examples/nrf/.cargo/config.toml b/examples/nrf52840/.cargo/config.toml
index 8ca28df39..8ca28df39 100644
--- a/examples/nrf/.cargo/config.toml
+++ b/examples/nrf52840/.cargo/config.toml
diff --git a/examples/nrf/Cargo.toml b/examples/nrf52840/Cargo.toml
index 994823a9e..994823a9e 100644
--- a/examples/nrf/Cargo.toml
+++ b/examples/nrf52840/Cargo.toml
diff --git a/examples/nrf/build.rs b/examples/nrf52840/build.rs
index 30691aa97..30691aa97 100644
--- a/examples/nrf/build.rs
+++ b/examples/nrf52840/build.rs
diff --git a/examples/nrf/memory.x b/examples/nrf52840/memory.x
index 9b04edec0..9b04edec0 100644
--- a/examples/nrf/memory.x
+++ b/examples/nrf52840/memory.x
diff --git a/examples/nrf/src/bin/awaitable_timer.rs b/examples/nrf52840/src/bin/awaitable_timer.rs
index b32af236c..b32af236c 100644
--- a/examples/nrf/src/bin/awaitable_timer.rs
+++ b/examples/nrf52840/src/bin/awaitable_timer.rs
diff --git a/examples/nrf/src/bin/blinky.rs b/examples/nrf52840/src/bin/blinky.rs
index 513f6cd82..513f6cd82 100644
--- a/examples/nrf/src/bin/blinky.rs
+++ b/examples/nrf52840/src/bin/blinky.rs
diff --git a/examples/nrf/src/bin/buffered_uart.rs b/examples/nrf52840/src/bin/buffered_uart.rs
index ea566f4b2..ea566f4b2 100644
--- a/examples/nrf/src/bin/buffered_uart.rs
+++ b/examples/nrf52840/src/bin/buffered_uart.rs
diff --git a/examples/nrf/src/bin/channel.rs b/examples/nrf52840/src/bin/channel.rs
index d782a79e7..d782a79e7 100644
--- a/examples/nrf/src/bin/channel.rs
+++ b/examples/nrf52840/src/bin/channel.rs
diff --git a/examples/nrf/src/bin/channel_sender_receiver.rs b/examples/nrf52840/src/bin/channel_sender_receiver.rs
index fcccdaed5..fcccdaed5 100644
--- a/examples/nrf/src/bin/channel_sender_receiver.rs
+++ b/examples/nrf52840/src/bin/channel_sender_receiver.rs
diff --git a/examples/nrf/src/bin/executor_fairness_test.rs b/examples/nrf52840/src/bin/executor_fairness_test.rs
index 2a28f2763..2a28f2763 100644
--- a/examples/nrf/src/bin/executor_fairness_test.rs
+++ b/examples/nrf52840/src/bin/executor_fairness_test.rs
diff --git a/examples/nrf/src/bin/gpiote_channel.rs b/examples/nrf52840/src/bin/gpiote_channel.rs
index 5bfd02465..5bfd02465 100644
--- a/examples/nrf/src/bin/gpiote_channel.rs
+++ b/examples/nrf52840/src/bin/gpiote_channel.rs
diff --git a/examples/nrf/src/bin/gpiote_port.rs b/examples/nrf52840/src/bin/gpiote_port.rs
index 0155d539e..0155d539e 100644
--- a/examples/nrf/src/bin/gpiote_port.rs
+++ b/examples/nrf52840/src/bin/gpiote_port.rs
diff --git a/examples/nrf/src/bin/i2s_effect.rs b/examples/nrf52840/src/bin/i2s_effect.rs
index 3cca005b1..3cca005b1 100644
--- a/examples/nrf/src/bin/i2s_effect.rs
+++ b/examples/nrf52840/src/bin/i2s_effect.rs
diff --git a/examples/nrf/src/bin/i2s_monitor.rs b/examples/nrf52840/src/bin/i2s_monitor.rs
index 48eb7d581..48eb7d581 100644
--- a/examples/nrf/src/bin/i2s_monitor.rs
+++ b/examples/nrf52840/src/bin/i2s_monitor.rs
diff --git a/examples/nrf/src/bin/i2s_waveform.rs b/examples/nrf52840/src/bin/i2s_waveform.rs
index 1b0e8ebc8..1b0e8ebc8 100644
--- a/examples/nrf/src/bin/i2s_waveform.rs
+++ b/examples/nrf52840/src/bin/i2s_waveform.rs
diff --git a/examples/nrf/src/bin/lora_p2p_report.rs b/examples/nrf52840/src/bin/lora_p2p_report.rs
index d512b83f6..d512b83f6 100644
--- a/examples/nrf/src/bin/lora_p2p_report.rs
+++ b/examples/nrf52840/src/bin/lora_p2p_report.rs
diff --git a/examples/nrf/src/bin/lora_p2p_sense.rs b/examples/nrf52840/src/bin/lora_p2p_sense.rs
index b9768874b..b9768874b 100644
--- a/examples/nrf/src/bin/lora_p2p_sense.rs
+++ b/examples/nrf52840/src/bin/lora_p2p_sense.rs
diff --git a/examples/nrf/src/bin/manually_create_executor.rs b/examples/nrf52840/src/bin/manually_create_executor.rs
index 12ce660f9..12ce660f9 100644
--- a/examples/nrf/src/bin/manually_create_executor.rs
+++ b/examples/nrf52840/src/bin/manually_create_executor.rs
diff --git a/examples/nrf/src/bin/multiprio.rs b/examples/nrf52840/src/bin/multiprio.rs
index 25806ae48..25806ae48 100644
--- a/examples/nrf/src/bin/multiprio.rs
+++ b/examples/nrf52840/src/bin/multiprio.rs
diff --git a/examples/nrf/src/bin/mutex.rs b/examples/nrf52840/src/bin/mutex.rs
index c402c6ba1..c402c6ba1 100644
--- a/examples/nrf/src/bin/mutex.rs
+++ b/examples/nrf52840/src/bin/mutex.rs
diff --git a/examples/nrf/src/bin/nvmc.rs b/examples/nrf52840/src/bin/nvmc.rs
index 75d090fbb..75d090fbb 100644
--- a/examples/nrf/src/bin/nvmc.rs
+++ b/examples/nrf52840/src/bin/nvmc.rs
diff --git a/examples/nrf/src/bin/pdm.rs b/examples/nrf52840/src/bin/pdm.rs
index 7388580fb..7388580fb 100644
--- a/examples/nrf/src/bin/pdm.rs
+++ b/examples/nrf52840/src/bin/pdm.rs
diff --git a/examples/nrf/src/bin/ppi.rs b/examples/nrf52840/src/bin/ppi.rs
index d74ce4064..d74ce4064 100644
--- a/examples/nrf/src/bin/ppi.rs
+++ b/examples/nrf52840/src/bin/ppi.rs
diff --git a/examples/nrf/src/bin/pubsub.rs b/examples/nrf52840/src/bin/pubsub.rs
index 688e6d075..688e6d075 100644
--- a/examples/nrf/src/bin/pubsub.rs
+++ b/examples/nrf52840/src/bin/pubsub.rs
diff --git a/examples/nrf/src/bin/pwm.rs b/examples/nrf52840/src/bin/pwm.rs
index 1698c0bc8..1698c0bc8 100644
--- a/examples/nrf/src/bin/pwm.rs
+++ b/examples/nrf52840/src/bin/pwm.rs
diff --git a/examples/nrf/src/bin/pwm_double_sequence.rs b/examples/nrf52840/src/bin/pwm_double_sequence.rs
index 16e50e909..16e50e909 100644
--- a/examples/nrf/src/bin/pwm_double_sequence.rs
+++ b/examples/nrf52840/src/bin/pwm_double_sequence.rs
diff --git a/examples/nrf/src/bin/pwm_sequence.rs b/examples/nrf52840/src/bin/pwm_sequence.rs
index b9aca9aaa..b9aca9aaa 100644
--- a/examples/nrf/src/bin/pwm_sequence.rs
+++ b/examples/nrf52840/src/bin/pwm_sequence.rs
diff --git a/examples/nrf/src/bin/pwm_sequence_ppi.rs b/examples/nrf52840/src/bin/pwm_sequence_ppi.rs
index 6594fa348..6594fa348 100644
--- a/examples/nrf/src/bin/pwm_sequence_ppi.rs
+++ b/examples/nrf52840/src/bin/pwm_sequence_ppi.rs
diff --git a/examples/nrf/src/bin/pwm_sequence_ws2812b.rs b/examples/nrf52840/src/bin/pwm_sequence_ws2812b.rs
index 711c8a17b..711c8a17b 100644
--- a/examples/nrf/src/bin/pwm_sequence_ws2812b.rs
+++ b/examples/nrf52840/src/bin/pwm_sequence_ws2812b.rs
diff --git a/examples/nrf/src/bin/pwm_servo.rs b/examples/nrf52840/src/bin/pwm_servo.rs
index 19228f433..19228f433 100644
--- a/examples/nrf/src/bin/pwm_servo.rs
+++ b/examples/nrf52840/src/bin/pwm_servo.rs
diff --git a/examples/nrf/src/bin/qdec.rs b/examples/nrf52840/src/bin/qdec.rs
index 600bba07a..600bba07a 100644
--- a/examples/nrf/src/bin/qdec.rs
+++ b/examples/nrf52840/src/bin/qdec.rs
diff --git a/examples/nrf/src/bin/qspi.rs b/examples/nrf52840/src/bin/qspi.rs
index bdcf710b8..bdcf710b8 100644
--- a/examples/nrf/src/bin/qspi.rs
+++ b/examples/nrf52840/src/bin/qspi.rs
diff --git a/examples/nrf/src/bin/qspi_lowpower.rs b/examples/nrf52840/src/bin/qspi_lowpower.rs
index 9341a2376..9341a2376 100644
--- a/examples/nrf/src/bin/qspi_lowpower.rs
+++ b/examples/nrf52840/src/bin/qspi_lowpower.rs
diff --git a/examples/nrf/src/bin/raw_spawn.rs b/examples/nrf52840/src/bin/raw_spawn.rs
index 1b067f5e4..1b067f5e4 100644
--- a/examples/nrf/src/bin/raw_spawn.rs
+++ b/examples/nrf52840/src/bin/raw_spawn.rs
diff --git a/examples/nrf/src/bin/rng.rs b/examples/nrf52840/src/bin/rng.rs
index 647073949..647073949 100644
--- a/examples/nrf/src/bin/rng.rs
+++ b/examples/nrf52840/src/bin/rng.rs
diff --git a/examples/nrf/src/bin/saadc.rs b/examples/nrf52840/src/bin/saadc.rs
index 7cf588090..7cf588090 100644
--- a/examples/nrf/src/bin/saadc.rs
+++ b/examples/nrf52840/src/bin/saadc.rs
diff --git a/examples/nrf/src/bin/saadc_continuous.rs b/examples/nrf52840/src/bin/saadc_continuous.rs
index bb50ac65e..bb50ac65e 100644
--- a/examples/nrf/src/bin/saadc_continuous.rs
+++ b/examples/nrf52840/src/bin/saadc_continuous.rs
diff --git a/examples/nrf/src/bin/self_spawn.rs b/examples/nrf52840/src/bin/self_spawn.rs
index 196255a52..196255a52 100644
--- a/examples/nrf/src/bin/self_spawn.rs
+++ b/examples/nrf52840/src/bin/self_spawn.rs
diff --git a/examples/nrf/src/bin/self_spawn_current_executor.rs b/examples/nrf52840/src/bin/self_spawn_current_executor.rs
index 8a179886c..8a179886c 100644
--- a/examples/nrf/src/bin/self_spawn_current_executor.rs
+++ b/examples/nrf52840/src/bin/self_spawn_current_executor.rs
diff --git a/examples/nrf/src/bin/spim.rs b/examples/nrf52840/src/bin/spim.rs
index 132e01660..132e01660 100644
--- a/examples/nrf/src/bin/spim.rs
+++ b/examples/nrf52840/src/bin/spim.rs
diff --git a/examples/nrf/src/bin/spis.rs b/examples/nrf52840/src/bin/spis.rs
index fe3b0c53d..fe3b0c53d 100644
--- a/examples/nrf/src/bin/spis.rs
+++ b/examples/nrf52840/src/bin/spis.rs
diff --git a/examples/nrf/src/bin/temp.rs b/examples/nrf52840/src/bin/temp.rs
index b06ac709e..b06ac709e 100644
--- a/examples/nrf/src/bin/temp.rs
+++ b/examples/nrf52840/src/bin/temp.rs
diff --git a/examples/nrf/src/bin/timer.rs b/examples/nrf52840/src/bin/timer.rs
index c22b5acd5..c22b5acd5 100644
--- a/examples/nrf/src/bin/timer.rs
+++ b/examples/nrf52840/src/bin/timer.rs
diff --git a/examples/nrf/src/bin/twim.rs b/examples/nrf52840/src/bin/twim.rs
index a027cc1e7..a027cc1e7 100644
--- a/examples/nrf/src/bin/twim.rs
+++ b/examples/nrf52840/src/bin/twim.rs
diff --git a/examples/nrf/src/bin/twim_lowpower.rs b/examples/nrf52840/src/bin/twim_lowpower.rs
index e30cc9688..e30cc9688 100644
--- a/examples/nrf/src/bin/twim_lowpower.rs
+++ b/examples/nrf52840/src/bin/twim_lowpower.rs
diff --git a/examples/nrf/src/bin/twis.rs b/examples/nrf52840/src/bin/twis.rs
index 54cba9494..54cba9494 100644
--- a/examples/nrf/src/bin/twis.rs
+++ b/examples/nrf52840/src/bin/twis.rs
diff --git a/examples/nrf/src/bin/uart.rs b/examples/nrf52840/src/bin/uart.rs
index 600f7a6ef..600f7a6ef 100644
--- a/examples/nrf/src/bin/uart.rs
+++ b/examples/nrf52840/src/bin/uart.rs
diff --git a/examples/nrf/src/bin/uart_idle.rs b/examples/nrf52840/src/bin/uart_idle.rs
index 6af4f7097..6af4f7097 100644
--- a/examples/nrf/src/bin/uart_idle.rs
+++ b/examples/nrf52840/src/bin/uart_idle.rs
diff --git a/examples/nrf/src/bin/uart_split.rs b/examples/nrf52840/src/bin/uart_split.rs
index 1adaf53fd..1adaf53fd 100644
--- a/examples/nrf/src/bin/uart_split.rs
+++ b/examples/nrf52840/src/bin/uart_split.rs
diff --git a/examples/nrf/src/bin/usb_ethernet.rs b/examples/nrf52840/src/bin/usb_ethernet.rs
index e5f704524..e5f704524 100644
--- a/examples/nrf/src/bin/usb_ethernet.rs
+++ b/examples/nrf52840/src/bin/usb_ethernet.rs
diff --git a/examples/nrf/src/bin/usb_hid_keyboard.rs b/examples/nrf52840/src/bin/usb_hid_keyboard.rs
index 76e198719..76e198719 100644
--- a/examples/nrf/src/bin/usb_hid_keyboard.rs
+++ b/examples/nrf52840/src/bin/usb_hid_keyboard.rs
diff --git a/examples/nrf/src/bin/usb_hid_mouse.rs b/examples/nrf52840/src/bin/usb_hid_mouse.rs
index 4916a38d4..4916a38d4 100644
--- a/examples/nrf/src/bin/usb_hid_mouse.rs
+++ b/examples/nrf52840/src/bin/usb_hid_mouse.rs
diff --git a/examples/nrf/src/bin/usb_serial.rs b/examples/nrf52840/src/bin/usb_serial.rs
index 7c9c4184b..7c9c4184b 100644
--- a/examples/nrf/src/bin/usb_serial.rs
+++ b/examples/nrf52840/src/bin/usb_serial.rs
diff --git a/examples/nrf/src/bin/usb_serial_multitask.rs b/examples/nrf52840/src/bin/usb_serial_multitask.rs
index 93efc2fe6..93efc2fe6 100644
--- a/examples/nrf/src/bin/usb_serial_multitask.rs
+++ b/examples/nrf52840/src/bin/usb_serial_multitask.rs
diff --git a/examples/nrf/src/bin/wdt.rs b/examples/nrf52840/src/bin/wdt.rs
index b0b9c3b81..b0b9c3b81 100644
--- a/examples/nrf/src/bin/wdt.rs
+++ b/examples/nrf52840/src/bin/wdt.rs
diff --git a/examples/nrf5340/.cargo/config.toml b/examples/nrf5340/.cargo/config.toml
new file mode 100644
index 000000000..ff0879c8c
--- /dev/null
+++ b/examples/nrf5340/.cargo/config.toml
@@ -0,0 +1,9 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+# replace nRF5340_xxAA with your chip as listed in `probe-run --list-chips`
+runner = "probe-run --chip nRF5340_xxAA"
+
+[build]
+target = "thumbv8m.main-none-eabihf"
+
+[env]
+DEFMT_LOG = "trace"
diff --git a/examples/nrf5340/Cargo.toml b/examples/nrf5340/Cargo.toml
new file mode 100644
index 000000000..03485711e
--- /dev/null
+++ b/examples/nrf5340/Cargo.toml
@@ -0,0 +1,64 @@
+[package]
+edition = "2021"
+name = "embassy-nrf-examples"
+version = "0.1.0"
+license = "MIT OR Apache-2.0"
+
+[features]
+default = ["nightly"]
+nightly = [
+    "embassy-executor/nightly",
+    "embassy-nrf/nightly",
+    "embassy-net/nightly",
+    "embassy-nrf/unstable-traits",
+    "embassy-usb",
+    "embedded-io/async",
+    "embassy-net",
+]
+
+[dependencies]
+embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
+embassy-sync = { version = "0.1.0", path = "../../embassy-sync", features = [
+    "defmt",
+] }
+embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features = [
+    "defmt",
+    "integrated-timers",
+] }
+embassy-time = { version = "0.1.0", path = "../../embassy-time", features = [
+    "defmt",
+    "defmt-timestamp-uptime",
+] }
+embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = [
+    "defmt",
+    "nrf5340-app-s",
+    "time-driver-rtc1",
+    "gpiote",
+    "unstable-pac",
+] }
+embassy-net = { version = "0.1.0", path = "../../embassy-net", features = [
+    "defmt",
+    "tcp",
+    "dhcpv4",
+    "medium-ethernet",
+], optional = true }
+embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = [
+    "defmt",
+], optional = true }
+embedded-io = "0.4.0"
+
+
+defmt = "0.3"
+defmt-rtt = "0.4"
+
+static_cell = "1.0"
+cortex-m = { version = "0.7.6", features = ["critical-section-single-core"] }
+cortex-m-rt = "0.7.0"
+panic-probe = { version = "0.3", features = ["print-defmt"] }
+futures = { version = "0.3.17", default-features = false, features = [
+    "async-await",
+] }
+rand = { version = "0.8.4", default-features = false }
+embedded-storage = "0.3.0"
+usbd-hid = "0.6.0"
+serde = { version = "1.0.136", default-features = false }
diff --git a/examples/nrf5340/build.rs b/examples/nrf5340/build.rs
new file mode 100644
index 000000000..30691aa97
--- /dev/null
+++ b/examples/nrf5340/build.rs
@@ -0,0 +1,35 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/examples/nrf5340/memory.x b/examples/nrf5340/memory.x
new file mode 100644
index 000000000..a122dc24a
--- /dev/null
+++ b/examples/nrf5340/memory.x
@@ -0,0 +1,7 @@
+MEMORY
+{
+  /* NOTE 1 K = 1 KiBi = 1024 bytes */
+  /* These values correspond to the NRF5340 */
+  FLASH : ORIGIN = 0x00000000, LENGTH = 1024K
+  RAM : ORIGIN = 0x20000000, LENGTH = 256K
+}
diff --git a/examples/nrf5340/src/bin/blinky.rs b/examples/nrf5340/src/bin/blinky.rs
new file mode 100644
index 000000000..3422cedf0
--- /dev/null
+++ b/examples/nrf5340/src/bin/blinky.rs
@@ -0,0 +1,21 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::{Level, Output, OutputDrive};
+use embassy_time::{Duration, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    let mut led = Output::new(p.P0_28, Level::Low, OutputDrive::Standard);
+
+    loop {
+        led.set_high();
+        Timer::after(Duration::from_millis(300)).await;
+        led.set_low();
+        Timer::after(Duration::from_millis(300)).await;
+    }
+}
diff --git a/examples/nrf5340/src/bin/gpiote_channel.rs b/examples/nrf5340/src/bin/gpiote_channel.rs
new file mode 100644
index 000000000..ceab1194a
--- /dev/null
+++ b/examples/nrf5340/src/bin/gpiote_channel.rs
@@ -0,0 +1,66 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_nrf::gpio::{Input, Pull};
+use embassy_nrf::gpiote::{InputChannel, InputChannelPolarity};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Starting!");
+
+    let ch1 = InputChannel::new(
+        p.GPIOTE_CH0,
+        Input::new(p.P0_23, Pull::Up),
+        InputChannelPolarity::HiToLo,
+    );
+    let ch2 = InputChannel::new(
+        p.GPIOTE_CH1,
+        Input::new(p.P0_24, Pull::Up),
+        InputChannelPolarity::LoToHi,
+    );
+    let ch3 = InputChannel::new(
+        p.GPIOTE_CH2,
+        Input::new(p.P0_08, Pull::Up),
+        InputChannelPolarity::Toggle,
+    );
+    let ch4 = InputChannel::new(
+        p.GPIOTE_CH3,
+        Input::new(p.P0_09, Pull::Up),
+        InputChannelPolarity::Toggle,
+    );
+
+    let button1 = async {
+        loop {
+            ch1.wait().await;
+            info!("Button 1 pressed")
+        }
+    };
+
+    let button2 = async {
+        loop {
+            ch2.wait().await;
+            info!("Button 2 released")
+        }
+    };
+
+    let button3 = async {
+        loop {
+            ch3.wait().await;
+            info!("Button 3 toggled")
+        }
+    };
+
+    let button4 = async {
+        loop {
+            ch4.wait().await;
+            info!("Button 4 toggled")
+        }
+    };
+
+    futures::join!(button1, button2, button3, button4);
+}
diff --git a/examples/nrf5340/src/bin/uart.rs b/examples/nrf5340/src/bin/uart.rs
new file mode 100644
index 000000000..0f2b7b1e3
--- /dev/null
+++ b/examples/nrf5340/src/bin/uart.rs
@@ -0,0 +1,35 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::Spawner;
+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::BAUD115200;
+
+    let irq = interrupt::take!(SERIAL0);
+    let mut uart = uarte::Uarte::new(p.UARTETWISPI0, irq, p.P1_00, p.P1_01, config);
+
+    info!("uarte initialized!");
+
+    // Message must be in SRAM
+    let mut buf = [0; 8];
+    buf.copy_from_slice(b"Hello!\r\n");
+
+    unwrap!(uart.write(&buf).await);
+    info!("wrote hello in uart!");
+
+    loop {
+        info!("reading...");
+        unwrap!(uart.read(&mut buf).await);
+        info!("writing...");
+        unwrap!(uart.write(&buf).await);
+    }
+}