net-enc28j60: add example.

1 files changed, 124 insertions, 0 deletions

diff --git a/examples/nrf52840/src/bin/ethernet_enc28j60.rs b/examples/nrf52840/src/bin/ethernet_enc28j60.rs
new file mode 100644
index 000000000..d1b796fab
--- /dev/null
+++ b/examples/nrf52840/src/bin/ethernet_enc28j60.rs
@@ -0,0 +1,124 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_net::tcp::TcpSocket;
+use embassy_net::{Stack, StackResources};
+use embassy_net_enc28j60::Enc28j60;
+use embassy_nrf::gpio::{Level, Output, OutputDrive};
+use embassy_nrf::rng::Rng;
+use embassy_nrf::spim::Spim;
+use embassy_nrf::{bind_interrupts, peripherals, spim};
+use embassy_time::Delay;
+use embedded_hal_bus::spi::ExclusiveDevice;
+use embedded_io_async::Write;
+use static_cell::make_static;
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    SPIM3 => spim::InterruptHandler<peripherals::SPI3>;
+    RNG => embassy_nrf::rng::InterruptHandler<peripherals::RNG>;
+});
+
+#[embassy_executor::task]
+async fn net_task(
+    stack: &'static Stack<
+        Enc28j60<
+            ExclusiveDevice<Spim<'static, peripherals::SPI3>, Output<'static, peripherals::P0_15>, Delay>,
+            Output<'static, peripherals::P0_13>,
+        >,
+    >,
+) -> ! {
+    stack.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("running!");
+
+    let eth_sck = p.P0_20;
+    let eth_mosi = p.P0_22;
+    let eth_miso = p.P0_24;
+    let eth_cs = p.P0_15;
+    let eth_rst = p.P0_13;
+    let _eth_irq = p.P0_12;
+
+    let mut config = spim::Config::default();
+    config.frequency = spim::Frequency::M16;
+    let spi = spim::Spim::new(p.SPI3, Irqs, eth_sck, eth_miso, eth_mosi, config);
+    let cs = Output::new(eth_cs, Level::High, OutputDrive::Standard);
+    let spi = ExclusiveDevice::new(spi, cs, Delay);
+
+    let rst = Output::new(eth_rst, Level::High, OutputDrive::Standard);
+    let mac_addr = [2, 3, 4, 5, 6, 7];
+    let device = Enc28j60::new(spi, Some(rst), mac_addr);
+
+    let config = embassy_net::Config::dhcpv4(Default::default());
+    // let config = embassy_net::Config::ipv4_static(embassy_net::StaticConfigV4 {
+    //    address: Ipv4Cidr::new(Ipv4Address::new(10, 42, 0, 61), 24),
+    //    dns_servers: Vec::new(),
+    //    gateway: Some(Ipv4Address::new(10, 42, 0, 1)),
+    // });
+
+    // 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
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
+
+    unwrap!(spawner.spawn(net_task(stack)));
+
+    // And now we can use it!
+
+    let mut rx_buffer = [0; 4096];
+    let mut tx_buffer = [0; 4096];
+    let mut buf = [0; 4096];
+
+    loop {
+        let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
+        socket.set_timeout(Some(embassy_time::Duration::from_secs(10)));
+
+        info!("Listening on TCP:1234...");
+        if let Err(e) = socket.accept(1234).await {
+            warn!("accept error: {:?}", e);
+            continue;
+        }
+
+        info!("Received connection from {:?}", socket.remote_endpoint());
+
+        loop {
+            let n = match socket.read(&mut buf).await {
+                Ok(0) => {
+                    warn!("read EOF");
+                    break;
+                }
+                Ok(n) => n,
+                Err(e) => {
+                    warn!("read error: {:?}", e);
+                    break;
+                }
+            };
+
+            info!("rxd {:02x}", &buf[..n]);
+
+            match socket.write_all(&buf[..n]).await {
+                Ok(()) => {}
+                Err(e) => {
+                    warn!("write error: {:?}", e);
+                    break;
+                }
+            };
+        }
+    }
+}