153 lines
4.5 KiB
Rust
153 lines
4.5 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_net::tcp::TcpSocket;
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use embassy_net::{Stack, StackResources};
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use embassy_rp::usb::Driver;
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use embassy_rp::{interrupt, peripherals};
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use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState};
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use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
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use embassy_usb::{Builder, Config, UsbDevice};
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use embedded_io::asynch::Write;
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use static_cell::StaticCell;
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use {defmt_rtt as _, panic_probe as _};
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type MyDriver = Driver<'static, peripherals::USB>;
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macro_rules! singleton {
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($val:expr) => {{
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type T = impl Sized;
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static STATIC_CELL: StaticCell<T> = StaticCell::new();
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let (x,) = STATIC_CELL.init(($val,));
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x
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}};
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}
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const MTU: usize = 1514;
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#[embassy_executor::task]
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async fn usb_task(mut device: UsbDevice<'static, MyDriver>) -> ! {
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device.run().await
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}
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#[embassy_executor::task]
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async fn usb_ncm_task(class: Runner<'static, MyDriver, MTU>) -> ! {
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class.run().await
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}
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#[embassy_executor::task]
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async fn net_task(stack: &'static Stack<Device<'static, MTU>>) -> ! {
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stack.run().await
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}
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#[embassy_executor::main]
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async fn main(spawner: Spawner) {
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let p = embassy_rp::init(Default::default());
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// Create the driver, from the HAL.
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let irq = interrupt::take!(USBCTRL_IRQ);
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let driver = Driver::new(p.USB, irq);
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// Create embassy-usb Config
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let mut config = Config::new(0xc0de, 0xcafe);
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config.manufacturer = Some("Embassy");
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config.product = Some("USB-Ethernet example");
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config.serial_number = Some("12345678");
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config.max_power = 100;
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config.max_packet_size_0 = 64;
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// Required for Windows support.
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config.composite_with_iads = true;
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config.device_class = 0xEF;
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config.device_sub_class = 0x02;
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config.device_protocol = 0x01;
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// Create embassy-usb DeviceBuilder using the driver and config.
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let mut builder = Builder::new(
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driver,
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config,
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&mut singleton!([0; 256])[..],
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&mut singleton!([0; 256])[..],
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&mut singleton!([0; 256])[..],
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&mut singleton!([0; 128])[..],
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None,
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);
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// Our MAC addr.
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let our_mac_addr = [0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC];
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// Host's MAC addr. This is the MAC the host "thinks" its USB-to-ethernet adapter has.
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let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
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// Create classes on the builder.
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let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
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// Build the builder.
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let usb = builder.build();
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unwrap!(spawner.spawn(usb_task(usb)));
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let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
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unwrap!(spawner.spawn(usb_ncm_task(runner)));
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let config = embassy_net::Config::Dhcp(Default::default());
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//let config = embassy_net::Config::Static(embassy_net::StaticConfig {
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// address: Ipv4Cidr::new(Ipv4Address::new(10, 42, 0, 61), 24),
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// dns_servers: Vec::new(),
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// gateway: Some(Ipv4Address::new(10, 42, 0, 1)),
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//});
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// Generate random seed
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let seed = 1234; // guaranteed random, chosen by a fair dice roll
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// Init network stack
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let stack = &*singleton!(Stack::new(device, config, singleton!(StackResources::<2>::new()), seed));
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unwrap!(spawner.spawn(net_task(stack)));
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// And now we can use it!
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let mut rx_buffer = [0; 4096];
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let mut tx_buffer = [0; 4096];
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let mut buf = [0; 4096];
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loop {
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let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
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socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
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info!("Listening on TCP:1234...");
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if let Err(e) = socket.accept(1234).await {
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warn!("accept error: {:?}", e);
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continue;
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}
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info!("Received connection from {:?}", socket.remote_endpoint());
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loop {
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let n = match socket.read(&mut buf).await {
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Ok(0) => {
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warn!("read EOF");
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break;
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}
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Ok(n) => n,
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Err(e) => {
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warn!("read error: {:?}", e);
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break;
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}
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};
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info!("rxd {:02x}", &buf[..n]);
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match socket.write_all(&buf[..n]).await {
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Ok(()) => {}
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Err(e) => {
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warn!("write error: {:?}", e);
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break;
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}
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};
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}
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}
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}
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