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|
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_net::udp::{PacketMetadata, UdpSocket};
use embassy_net::{Ipv4Address, Ipv4Cidr, StackResources};
use embassy_stm32::eth::{Ethernet, GenericPhy, PacketQueue};
use embassy_stm32::peripherals::ETH;
use embassy_stm32::rng::Rng;
use embassy_stm32::{bind_interrupts, eth, peripherals, rng, Config};
use embassy_time::Timer;
use heapless::Vec;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
ETH => eth::InterruptHandler;
RNG => rng::InterruptHandler<peripherals::RNG>;
});
type Device = Ethernet<'static, ETH, GenericPhy>;
#[embassy_executor::task]
async fn net_task(mut runner: embassy_net::Runner<'static, Device>) -> ! {
runner.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) -> ! {
let mut config = Config::default();
{
use embassy_stm32::rcc::*;
config.rcc.hsi = Some(HSIPrescaler::DIV1);
config.rcc.csi = true;
config.rcc.hsi48 = Some(Default::default()); // needed for RNG
config.rcc.pll1 = Some(Pll {
source: PllSource::HSI,
prediv: PllPreDiv::DIV4,
mul: PllMul::MUL50,
divp: Some(PllDiv::DIV2),
divq: None,
divr: None,
divs: None,
divt: None,
});
config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
config.rcc.apb4_pre = APBPrescaler::DIV2; // 100 Mhz
config.rcc.apb5_pre = APBPrescaler::DIV2; // 100 Mhz
config.rcc.voltage_scale = VoltageScale::HIGH;
}
let p = embassy_stm32::init(config);
info!("Hello World!");
// Generate random seed.
let mut rng = Rng::new(p.RNG, Irqs);
let mut seed = [0; 8];
rng.fill_bytes(&mut seed);
let seed = u64::from_le_bytes(seed);
let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
static PACKETS: StaticCell<PacketQueue<4, 4>> = StaticCell::new();
let device = Ethernet::new(
PACKETS.init(PacketQueue::<4, 4>::new()),
p.ETH,
Irqs,
p.PB6,
p.PA2,
p.PG6,
p.PA7,
p.PG4,
p.PG5,
p.PG13,
p.PG12,
p.PG11,
GenericPhy::new(0),
mac_addr,
);
// Have to use UDP w/ static config to fit in internal flash
// 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)),
});
// Init network stack
static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
let (stack, runner) = embassy_net::new(device, config, RESOURCES.init(StackResources::new()), seed);
// Launch network task
spawner.spawn(unwrap!(net_task(runner)));
// Ensure DHCP configuration is up before trying connect
//stack.wait_config_up().await;
info!("Network task initialized");
// Then we can use it!
let mut rx_meta = [PacketMetadata::EMPTY; 16];
let mut rx_buffer = [0; 1024];
let mut tx_meta = [PacketMetadata::EMPTY; 16];
let mut tx_buffer = [0; 1024];
let remote_endpoint = (Ipv4Address::new(10, 42, 0, 1), 8000);
let socket = UdpSocket::new(stack, &mut rx_meta, &mut rx_buffer, &mut tx_meta, &mut tx_buffer);
loop {
// You need to start a server on the host machine, for example: `nc -lu 8000`
socket
.send_to(b"Hello, world", remote_endpoint)
.await
.expect("Buffer sent");
Timer::after_secs(1).await;
}
}
|
