1 files changed, 143 insertions, 0 deletions

diff --git a/examples/rp235x/src/bin/ethernet_w5500_icmp.rs b/examples/rp235x/src/bin/ethernet_w5500_icmp.rs
new file mode 100644
index 000000000..f1abd311c
--- /dev/null
+++ b/examples/rp235x/src/bin/ethernet_w5500_icmp.rs
@@ -0,0 +1,143 @@
+//! This example implements an echo (ping) with an ICMP Socket and using defmt to report the results.
+//!
+//! Although there is a better way to execute pings using the child module ping of the icmp module,
+//! this example allows for other icmp messages like `Destination unreachable` to be sent aswell.
+//!
+//! Example written for the [`WIZnet W5500-EVB-Pico2`](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico2) board.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_futures::yield_now;
+use embassy_net::icmp::{ChecksumCapabilities, IcmpEndpoint, IcmpSocket, Icmpv4Packet, Icmpv4Repr, PacketMetadata};
+use embassy_net::{Stack, StackResources};
+use embassy_net_wiznet::chip::W5500;
+use embassy_net_wiznet::*;
+use embassy_rp::clocks::RoscRng;
+use embassy_rp::gpio::{Input, Level, Output, Pull};
+use embassy_rp::peripherals::SPI0;
+use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
+use embassy_time::{Delay, Instant, Timer};
+use embedded_hal_bus::spi::ExclusiveDevice;
+use static_cell::StaticCell;
+use {defmt_rtt as _, panic_probe as _};
+
+type ExclusiveSpiDevice = ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static>, Delay>;
+
+#[embassy_executor::task]
+async fn ethernet_task(runner: Runner<'static, W5500, ExclusiveSpiDevice, Input<'static>, Output<'static>>) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::task]
+async fn net_task(mut runner: embassy_net::Runner<'static, Device<'static>>) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    let mut rng = RoscRng;
+
+    let mut spi_cfg = SpiConfig::default();
+    spi_cfg.frequency = 50_000_000;
+    let (miso, mosi, clk) = (p.PIN_16, p.PIN_19, p.PIN_18);
+    let spi = Spi::new(p.SPI0, clk, mosi, miso, p.DMA_CH0, p.DMA_CH1, spi_cfg);
+    let cs = Output::new(p.PIN_17, Level::High);
+    let w5500_int = Input::new(p.PIN_21, Pull::Up);
+    let w5500_reset = Output::new(p.PIN_20, Level::High);
+
+    let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
+    static STATE: StaticCell<State<8, 8>> = StaticCell::new();
+    let state = STATE.init(State::<8, 8>::new());
+    let (device, runner) = embassy_net_wiznet::new(
+        mac_addr,
+        state,
+        ExclusiveDevice::new(spi, cs, Delay),
+        w5500_int,
+        w5500_reset,
+    )
+    .await
+    .unwrap();
+    unwrap!(spawner.spawn(ethernet_task(runner)));
+
+    // Generate random seed
+    let seed = rng.next_u64();
+
+    // Init network stack
+    static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
+    let (stack, runner) = embassy_net::new(
+        device,
+        embassy_net::Config::dhcpv4(Default::default()),
+        RESOURCES.init(StackResources::new()),
+        seed,
+    );
+
+    // Launch network task
+    unwrap!(spawner.spawn(net_task(runner)));
+
+    info!("Waiting for DHCP...");
+    let cfg = wait_for_config(stack).await;
+    let local_addr = cfg.address.address();
+    info!("IP address: {:?}", local_addr);
+
+    // Then we can use it!
+    let mut rx_buffer = [0; 256];
+    let mut tx_buffer = [0; 256];
+    let mut rx_meta = [PacketMetadata::EMPTY];
+    let mut tx_meta = [PacketMetadata::EMPTY];
+
+    // Identifier used for the ICMP socket
+    let ident = 42;
+
+    // Create and bind the socket
+    let mut socket = IcmpSocket::new(stack, &mut rx_meta, &mut rx_buffer, &mut tx_meta, &mut tx_buffer);
+    socket.bind(IcmpEndpoint::Ident(ident)).unwrap();
+
+    // Create the repr for the packet
+    let icmp_repr = Icmpv4Repr::EchoRequest {
+        ident,
+        seq_no: 0,
+        data: b"Hello, icmp!",
+    };
+
+    // Send the packet and store the starting instant to mesure latency later
+    let start = socket
+        .send_to_with(icmp_repr.buffer_len(), cfg.gateway.unwrap(), |buf| {
+            // Create and populate the packet buffer allocated by `send_to_with`
+            let mut icmp_packet = Icmpv4Packet::new_unchecked(buf);
+            icmp_repr.emit(&mut icmp_packet, &ChecksumCapabilities::default());
+            Instant::now() // Return the instant where the packet was sent
+        })
+        .await
+        .unwrap();
+
+    // Recieve and log the data of the reply
+    socket
+        .recv_from_with(|(buf, addr)| {
+            let packet = Icmpv4Packet::new_checked(buf).unwrap();
+            info!(
+                "Recieved {:?} from {} in {}ms",
+                packet.data(),
+                addr,
+                start.elapsed().as_millis()
+            );
+        })
+        .await
+        .unwrap();
+
+    loop {
+        Timer::after_secs(10).await;
+    }
+}
+
+async fn wait_for_config(stack: Stack<'static>) -> embassy_net::StaticConfigV4 {
+    loop {
+        if let Some(config) = stack.config_v4() {
+            return config.clone();
+        }
+        yield_now().await;
+    }
+}