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|
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_net::tcp::TcpSocket;
use embassy_net::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::StaticCell;
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(
mut runner: embassy_net::Runner<
'static,
Enc28j60<ExclusiveDevice<Spim<'static, peripherals::SPI3>, Output<'static>, Delay>, Output<'static>>,
>,
) -> ! {
runner.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
static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
let (stack, runner) = embassy_net::new(device, config, RESOURCES.init(StackResources::new()), seed);
unwrap!(spawner.spawn(net_task(runner)));
// 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;
}
};
}
}
}
|
