1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
//! This example implements a TCP client that attempts to connect to a host on port 1234 and send it some data once per second.
//!
//! Example written for the [`WIZnet W5500-EVB-Pico2`](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico2) board.
#![no_std]
#![no_main]
use core::str::FromStr;
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_net::{Stack, StackResources};
use embassy_net_wiznet::chip::W5500;
use embassy_net_wiznet::*;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Input, Level, Output, Pull};
use embassy_rp::peripherals::SPI0;
use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
use embassy_time::{Delay, Duration, Timer};
use embedded_hal_bus::spi::ExclusiveDevice;
use embedded_io_async::Write;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::task]
async fn ethernet_task(
runner: Runner<
'static,
W5500,
ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static>, Delay>,
Input<'static>,
Output<'static>,
>,
) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(mut runner: embassy_net::Runner<'static, Device<'static>>) -> ! {
runner.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut rng = RoscRng;
let mut led = Output::new(p.PIN_25, Level::Low);
let mut spi_cfg = SpiConfig::default();
spi_cfg.frequency = 50_000_000;
let (miso, mosi, clk) = (p.PIN_16, p.PIN_19, p.PIN_18);
let spi = Spi::new(p.SPI0, clk, mosi, miso, p.DMA_CH0, p.DMA_CH1, spi_cfg);
let cs = Output::new(p.PIN_17, Level::High);
let w5500_int = Input::new(p.PIN_21, Pull::Up);
let w5500_reset = Output::new(p.PIN_20, Level::High);
let mac_addr = [0x02, 0x00, 0x00, 0x00, 0x00, 0x00];
static STATE: StaticCell<State<8, 8>> = StaticCell::new();
let state = STATE.init(State::<8, 8>::new());
let (device, runner) = embassy_net_wiznet::new(
mac_addr,
state,
ExclusiveDevice::new(spi, cs, Delay),
w5500_int,
w5500_reset,
)
.await
.unwrap();
spawner.spawn(unwrap!(ethernet_task(runner)));
// Generate random seed
let seed = rng.next_u64();
// Init network stack
static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
let (stack, runner) = embassy_net::new(
device,
embassy_net::Config::dhcpv4(Default::default()),
RESOURCES.init(StackResources::new()),
seed,
);
// Launch network task
spawner.spawn(unwrap!(net_task(runner)));
info!("Waiting for DHCP...");
let cfg = wait_for_config(stack).await;
let local_addr = cfg.address.address();
info!("IP address: {:?}", local_addr);
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
loop {
let mut socket = embassy_net::tcp::TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(Duration::from_secs(10)));
led.set_low();
info!("Connecting...");
let host_addr = embassy_net::Ipv4Address::from_str("192.168.0.118").unwrap();
if let Err(e) = socket.connect((host_addr, 1234)).await {
warn!("connect error: {:?}", e);
continue;
}
info!("Connected to {:?}", socket.remote_endpoint());
led.set_high();
let msg = b"Hello world!\n";
loop {
if let Err(e) = socket.write_all(msg).await {
warn!("write error: {:?}", e);
break;
}
info!("txd: {}", core::str::from_utf8(msg).unwrap());
Timer::after_secs(1).await;
}
}
}
async fn wait_for_config(stack: Stack<'static>) -> embassy_net::StaticConfigV4 {
loop {
if let Some(config) = stack.config_v4() {
return config.clone();
}
yield_now().await;
}
}
|
