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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy::executor::Spawner;
use embassy::time::{Duration, Timer};
use embassy::util::Forever;
use embassy_net::tcp::TcpSocket;
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::U32Ext;
use embassy_stm32::Config;
use embassy_stm32::{interrupt, Peripherals};
use embedded_io::asynch::Write;
use defmt_rtt as _; // global logger
use panic_probe as _;
use rand_core::RngCore;
macro_rules! forever {
($val:expr) => {{
type T = impl Sized;
static FOREVER: Forever<T> = Forever::new();
FOREVER.put_with(move || $val)
}};
}
type Device = Ethernet<'static, ETH, GenericSMI, 4, 4>;
#[embassy::task]
async fn net_task(stack: &'static Stack<Device>) -> ! {
stack.run().await
}
fn config() -> Config {
let mut config = Config::default();
config.rcc.sys_ck = Some(200.mhz().into());
config
}
#[embassy::main(config = "config()")]
async fn main(spawner: Spawner, p: Peripherals) -> ! {
info!("Hello World!");
// 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);
let eth_int = interrupt::take!(ETH);
let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
let device = unsafe {
Ethernet::new(
forever!(State::new()),
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,
)
};
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
let stack = &*forever!(Stack::new(
device,
config,
forever!(StackResources::<1, 2, 8>::new()),
seed
));
// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
info!("Network task initialized");
// 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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