embassy/examples/stm32h7/src/bin/eth.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
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use embassy_net::tcp::TcpSocket;
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use embassy_net::{Ipv4Address, Stack, StackResources};
use embassy_stm32::eth::generic_smi::GenericSMI;
use embassy_stm32::eth::{Ethernet, State};
use embassy_stm32::peripherals::ETH;
use embassy_stm32::rng::Rng;
use embassy_stm32::time::mhz;
use embassy_stm32::{interrupt, Config};
use embassy_time::{Duration, Timer};
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use embedded_io::asynch::Write;
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use rand_core::RngCore;
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use static_cell::StaticCell;
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use {defmt_rtt as _, panic_probe as _};
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macro_rules! singleton {
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($val:expr) => {{
type T = impl Sized;
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static STATIC_CELL: StaticCell<T> = StaticCell::new();
STATIC_CELL.init_with(move || $val)
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}};
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}
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type Device = Ethernet<'static, ETH, GenericSMI, 4, 4>;
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#[embassy_executor::task]
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async fn net_task(stack: &'static Stack<Device>) -> ! {
stack.run().await
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}
#[embassy_executor::main]
async fn main(spawner: Spawner) -> ! {
let mut config = Config::default();
config.rcc.sys_ck = Some(mhz(400));
config.rcc.hclk = Some(mhz(200));
config.rcc.pll1.q_ck = Some(mhz(100));
let p = embassy_stm32::init(config);
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info!("Hello World!");
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// Generate random seed.
let mut rng = Rng::new(p.RNG);
let mut seed = [0; 8];
rng.fill_bytes(&mut seed);
let seed = u64::from_le_bytes(seed);
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let eth_int = interrupt::take!(ETH);
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let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
let device = unsafe {
Ethernet::new(
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singleton!(State::new()),
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p.ETH,
eth_int,
p.PA1,
p.PA2,
p.PC1,
p.PA7,
p.PC4,
p.PC5,
p.PG13,
p.PB13,
p.PG11,
GenericSMI,
mac_addr,
0,
)
};
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let config = embassy_net::ConfigStrategy::Dhcp;
//let config = embassy_net::ConfigStrategy::Static(embassy_net::Config {
// address: Ipv4Cidr::new(Ipv4Address::new(10, 42, 0, 61), 24),
// dns_servers: Vec::new(),
// gateway: Some(Ipv4Address::new(10, 42, 0, 1)),
//});
// Init network stack
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let stack = &*singleton!(Stack::new(
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device,
config,
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singleton!(StackResources::<1, 2, 8>::new()),
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seed
));
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// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
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info!("Network task initialized");
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// Then we can use it!
let mut rx_buffer = [0; 1024];
let mut tx_buffer = [0; 1024];
loop {
let mut socket = TcpSocket::new(&stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
let remote_endpoint = (Ipv4Address::new(10, 42, 0, 1), 8000);
info!("connecting...");
let r = socket.connect(remote_endpoint).await;
if let Err(e) = r {
info!("connect error: {:?}", e);
continue;
}
info!("connected!");
loop {
let r = socket.write_all(b"Hello\n").await;
if let Err(e) = r {
info!("write error: {:?}", e);
return;
}
Timer::after(Duration::from_secs(1)).await;
}
}
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}