From 224d6b03125dd9c799611883914dd99c5431e749 Mon Sep 17 00:00:00 2001
From: Remmirad <remmirad@posteo.net>
Date: Sat, 6 Sep 2025 11:32:23 +0200
Subject: nrf: 802.15.4 embassy-net-driver

---
 examples/nrf52840/src/bin/sixlowpan.rs | 120 +++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 examples/nrf52840/src/bin/sixlowpan.rs

(limited to 'examples/nrf52840/src')

diff --git a/examples/nrf52840/src/bin/sixlowpan.rs b/examples/nrf52840/src/bin/sixlowpan.rs
new file mode 100644
index 000000000..00a597366
--- /dev/null
+++ b/examples/nrf52840/src/bin/sixlowpan.rs
@@ -0,0 +1,120 @@
+#![no_std]
+#![no_main]
+
+use core::net::Ipv6Addr;
+
+use defmt::{info, unwrap, warn};
+use embassy_executor::Spawner;
+use embassy_net::udp::{PacketMetadata, UdpMetadata, UdpSocket};
+use embassy_net::{IpAddress, IpEndpoint, IpListenEndpoint, Ipv6Cidr, StackResources, StaticConfigV6};
+use embassy_nrf::config::{Config, HfclkSource};
+use embassy_nrf::rng::Rng;
+use embassy_nrf::{bind_interrupts, embassy_net_802154_driver as net, peripherals, radio};
+use embassy_time::Delay;
+use embedded_hal_async::delay::DelayNs;
+use static_cell::StaticCell;
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    RADIO => radio::InterruptHandler<peripherals::RADIO>;
+    RNG => embassy_nrf::rng::InterruptHandler<peripherals::RNG>;
+});
+
+#[embassy_executor::task]
+async fn ieee802154_task(runner: net::Runner<'static, peripherals::RADIO>) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::task]
+async fn net_task(mut runner: embassy_net::Runner<'static, net::Device<'static>>) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let mut config = Config::default();
+    // Necessary to run the radio nrf52840 v1.11 5.4.1
+    config.hfclk_source = HfclkSource::ExternalXtal;
+    let p = embassy_nrf::init(config);
+
+    let mac_addr: [u8; 8] = [2, 3, 4, 5, 6, 7, 8, 9];
+    static NRF802154_STATE: StaticCell<net::State<20, 20>> = StaticCell::new();
+    let (device, runner) = net::new(mac_addr, p.RADIO, Irqs, NRF802154_STATE.init(net::State::new()))
+        .await
+        .unwrap();
+
+    spawner.spawn(unwrap!(ieee802154_task(runner)));
+
+    // Swap these when flashing a second board
+    let peer = Ipv6Addr::new(0xfe80, 0, 0, 0, 0xd701, 0xda3f, 0x3955, 0x82a4);
+    let local = Ipv6Addr::new(0xfe80, 0, 0, 0, 0xd701, 0xda3f, 0x3955, 0x82a5);
+
+    let config = embassy_net::Config::ipv6_static(StaticConfigV6 {
+        address: Ipv6Cidr::new(local, 64),
+        gateway: None,
+        dns_servers: Default::default(),
+    });
+
+    // Generate random seed
+    let mut rng = Rng::new(p.RNG, Irqs);
+    let mut seed = [0; 8];
+    rng.blocking_fill_bytes(&mut seed);
+    let seed = u64::from_le_bytes(seed);
+
+    // Init network stack
+    static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
+    let (stack, runner) = embassy_net::new(device, config, RESOURCES.init(StackResources::new()), seed);
+
+    spawner.spawn(unwrap!(net_task(runner)));
+
+    let mut rx_buffer = [0; 2096];
+    let mut tx_buffer = [0; 2096];
+    let mut tx_m_buffer = [PacketMetadata::EMPTY; 5];
+    let mut rx_m_buffer = [PacketMetadata::EMPTY; 5];
+
+    let mut delay = Delay;
+    loop {
+        let mut socket = UdpSocket::new(
+            stack,
+            &mut tx_m_buffer,
+            &mut rx_buffer,
+            &mut rx_m_buffer,
+            &mut tx_buffer,
+        );
+        socket
+            .bind(IpListenEndpoint {
+                addr: Some(IpAddress::Ipv6(local)),
+                port: 1234,
+            })
+            .unwrap();
+        let rep = UdpMetadata {
+            endpoint: IpEndpoint {
+                addr: IpAddress::Ipv6(peer),
+                port: 1234,
+            },
+            local_address: Some(IpAddress::Ipv6(local)),
+            meta: Default::default(),
+        };
+
+        info!("Listening on {:?} UDP:1234...", local);
+
+        let mut recv_buf = [0; 12];
+        loop {
+            delay.delay_ms(2000).await;
+            if socket.may_recv() {
+                let n = match socket.recv_from(&mut recv_buf).await {
+                    Ok((0, _)) => panic!(),
+                    Ok((n, _)) => n,
+                    Err(e) => {
+                        warn!("read error: {:?}", e);
+                        break;
+                    }
+                };
+                info!("Received {:02x}", &recv_buf[..n]);
+            }
+
+            info!("Sending");
+            socket.send_to(b"Hello World", rep).await.unwrap();
+        }
+    }
+}
-- 
cgit