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kalkyl 2023-05-09 01:51:08 +02:00
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*.iml
**/target
**/*.rs.bk
Cargo.lock

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{
"rust-analyzer.linkedProjects": [
".\\examples\\Cargo.toml"
]
}

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[package]
name = "embassy-net-w5500"
version = "0.1.0"
description = "embassy-net driver for the W5500 ethernet chip"
keywords = ["embedded", "w5500", "embassy-net", "embedded-hal-async", "ethernet", "async"]
categories = ["embedded", "hardware-support", "no-std", "network-programming", "async"]
license = "MIT OR Apache-2.0"
edition = "2021"
[dependencies]
embedded-hal = { version = "1.0.0-alpha.10" }
embedded-hal-async = { version = "=0.2.0-alpha.1" }
embassy-net-driver-channel = { version = "0.1.0" }
embassy-time = { version = "0.1.0" }
embassy-futures = { version = "0.1.0" }
defmt = { version = "0.3", optional = true }
[patch.crates-io]
embassy-executor = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-time = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-futures = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-sync = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-rp = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net-driver = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net-driver-channel = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }

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Apache License
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APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
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Copyright 2019-2022 Embassy project contributors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Copyright (c) 2019-2022 Embassy project contributors
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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# WIZnet W5500 `embassy-net` integration
[`embassy-net`](https://crates.io/crates/embassy-net) integration for the WIZnet W5500 SPI ethernet chip, operating in MACRAW mode.
Supports any SPI driver implementing [`embedded-hal-async`](https://crates.io/crates/embedded-hal-async)
See [`examples`](https://github.com/kalkyl/embassy-net-w5500/tree/main/examples) directory for usage examples with the rp2040 [`WIZnet W5500-EVB-Pico`](https://www.wiznet.io/product-item/w5500-evb-pico/) module.

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[target.'cfg(all(target_arch = "arm", target_os = "none"))']
runner = "probe-rs-cli run --chip RP2040"
[build]
target = "thumbv6m-none-eabi"
[env]
DEFMT_LOG = "info"

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[package]
name = "embassy-net-w5500-examples"
version = "0.1.0"
edition = "2021"
[dependencies]
embassy-executor = { version = "0.1.0", features = ["defmt", "integrated-timers", "executor-thread", "arch-cortex-m"] }
embassy-time = { version = "0.1.0", features = ["defmt", "defmt-timestamp-uptime"] }
embassy-rp = { version = "0.1.0", features = ["defmt", "unstable-traits", "nightly", "unstable-pac", "time-driver"] }
embassy-net = { version = "0.1.0", features = ["defmt", "tcp", "udp", "dhcpv4", "medium-ethernet", "unstable-traits", "nightly"] }
embassy-sync = { version = "0.1.0" }
embassy-futures = { version = "0.1.0" }
embassy-net-driver = { version = "0.1.0" }
embassy-net-driver-channel = { version = "0.1.0" }
atomic-polyfill = "0.1.5"
static_cell = "1.0"
defmt = "=0.3.2"
defmt-rtt = "0.3"
panic-probe = { version = "0.3", features = ["print-defmt"] }
cortex-m = { version = "0.7.6", features = ["critical-section-single-core"] }
cortex-m-rt = "0.7.0"
embedded-io = { version = "0.4.0", features = ["async", "defmt"] }
heapless = "0.7.15"
embedded-hal = { version = "1.0.0-alpha.10" }
embedded-hal-async = { version = "=0.2.0-alpha.1" }
rand = { version = "0.8.5", default-features = false }
embassy-net-w5500 = { path = "../" }
[patch.crates-io]
embassy-executor = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-time = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-futures = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-sync = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-rp = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net-driver = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
embassy-net-driver-channel = { git = "https://github.com/embassy-rs/embassy", rev = "03d6363d5af5dcaf21b52734994a466ca593d2b6" }
[profile.dev]
debug = 2
debug-assertions = true
opt-level = 1
overflow-checks = true
[profile.release]
codegen-units = 1
debug = 1
debug-assertions = false
incremental = false
lto = 'fat'
opt-level = 'z'
overflow-checks = false
# do not optimize proc-macro crates = faster builds from scratch
[profile.dev.build-override]
codegen-units = 8
debug = false
debug-assertions = false
opt-level = 0
overflow-checks = false
[profile.release.build-override]
codegen-units = 8
debug = false
debug-assertions = false
opt-level = 0
overflow-checks = false

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# Examples for the rp2040 `WIZnet W5500-EVB-Pico` board
Examples are written for the [`WIZnet W5500-EVB-Pico`](https://www.wiznet.io/product-item/w5500-evb-pico/) board.
## Prerequisites
```bash
cargo install probe-rs-cli
```
## TCP server example
```bash
cargo run --bin tcp-server --release
```
This example implements a TCP echo server on port 1234 and using DHCP.
Send it some data, you should see it echoed back and printed in the console.
## Multi-socket example
```bash
cargo run --bin multisocket --release
```
This example shows how you can allow multiple simultaneous TCP connections, by having multiple sockets listening on the same port.
## TCP client example
```bash
cargo run --bin tcp-client --release
```
This example implements a TCP client that attempts to connect to a host on port 1234 and send it some data once per second.
## UDP server example
```bash
cargo run --bin udp --release
```
This example implements a UDP server listening on port 1234 and echoing back the data.

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//! This build script copies the `memory.x` file from the crate root into
//! a directory where the linker can always find it at build time.
//! For many projects this is optional, as the linker always searches the
//! project root directory -- wherever `Cargo.toml` is. However, if you
//! are using a workspace or have a more complicated build setup, this
//! build script becomes required. Additionally, by requesting that
//! Cargo re-run the build script whenever `memory.x` is changed,
//! updating `memory.x` ensures a rebuild of the application with the
//! new memory settings.
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
fn main() {
// Put `memory.x` in our output directory and ensure it's
// on the linker search path.
let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
File::create(out.join("memory.x"))
.unwrap()
.write_all(include_bytes!("memory.x"))
.unwrap();
println!("cargo:rustc-link-search={}", out.display());
// By default, Cargo will re-run a build script whenever
// any file in the project changes. By specifying `memory.x`
// here, we ensure the build script is only re-run when
// `memory.x` is changed.
println!("cargo:rerun-if-changed=memory.x");
println!("cargo:rustc-link-arg-bins=--nmagic");
println!("cargo:rustc-link-arg-bins=-Tlink.x");
println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
}

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MEMORY {
BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
FLASH : ORIGIN = 0x10000100, LENGTH = 1024K - 0x100
RAM : ORIGIN = 0x20000000, LENGTH = 256K
}

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_net::{Stack, StackResources};
use embassy_net_w5500::*;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Input, Level, Output, Pull};
use embassy_rp::peripherals::{PIN_17, PIN_20, PIN_21, SPI0};
use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
use embedded_hal_async::spi::ExclusiveDevice;
use embedded_io::asynch::Write;
use rand::RngCore;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
macro_rules! singleton {
($val:expr) => {{
type T = impl Sized;
static STATIC_CELL: StaticCell<T> = StaticCell::new();
let (x,) = STATIC_CELL.init(($val,));
x
}};
}
#[embassy_executor::task]
async fn ethernet_task(
runner: Runner<
'static,
ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static, PIN_17>>,
Input<'static, PIN_21>,
Output<'static, PIN_20>,
>,
) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<Device<'static>>) -> ! {
stack.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut rng = RoscRng;
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];
let state = singleton!(State::<8, 8>::new());
let (device, runner) = embassy_net_w5500::new(
mac_addr,
state,
ExclusiveDevice::new(spi, cs),
w5500_int,
w5500_reset,
)
.await;
unwrap!(spawner.spawn(ethernet_task(runner)));
// Generate random seed
let seed = rng.next_u64();
// Init network stack
let stack = &*singleton!(Stack::new(
device,
embassy_net::Config::Dhcp(Default::default()),
singleton!(StackResources::<3>::new()),
seed
));
// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
info!("Waiting for DHCP...");
let cfg = wait_for_config(stack).await;
let local_addr = cfg.address.address();
info!("IP address: {:?}", local_addr);
// Create two sockets listening to the same port, to handle simultaneous connections
unwrap!(spawner.spawn(listen_task(&stack, 0, 1234)));
unwrap!(spawner.spawn(listen_task(&stack, 1, 1234)));
}
#[embassy_executor::task(pool_size = 2)]
async fn listen_task(stack: &'static Stack<Device<'static>>, id: u8, port: u16) {
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
let mut buf = [0; 4096];
loop {
let mut socket = embassy_net::tcp::TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
info!("SOCKET {}: Listening on TCP:{}...", id, port);
if let Err(e) = socket.accept(port).await {
warn!("accept error: {:?}", e);
continue;
}
info!(
"SOCKET {}: Received connection from {:?}",
id,
socket.remote_endpoint()
);
loop {
let n = match socket.read(&mut buf).await {
Ok(0) => {
warn!("read EOF");
break;
}
Ok(n) => n,
Err(e) => {
warn!("SOCKET {}: {:?}", id, e);
break;
}
};
info!(
"SOCKET {}: rxd {}",
id,
core::str::from_utf8(&buf[..n]).unwrap()
);
if let Err(e) = socket.write_all(&buf[..n]).await {
warn!("write error: {:?}", e);
break;
}
}
}
}
async fn wait_for_config(stack: &'static Stack<Device<'static>>) -> embassy_net::StaticConfig {
loop {
if let Some(config) = stack.config() {
return config.clone();
}
yield_now().await;
}
}

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use core::str::FromStr;
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_net::{Stack, StackResources};
use embassy_net_w5500::*;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Input, Level, Output, Pull};
use embassy_rp::peripherals::{PIN_17, PIN_20, PIN_21, SPI0};
use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
use embassy_time::{Duration, Timer};
use embedded_hal_async::spi::ExclusiveDevice;
use embedded_io::asynch::Write;
use rand::RngCore;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
macro_rules! singleton {
($val:expr) => {{
type T = impl Sized;
static STATIC_CELL: StaticCell<T> = StaticCell::new();
let (x,) = STATIC_CELL.init(($val,));
x
}};
}
#[embassy_executor::task]
async fn ethernet_task(
runner: Runner<
'static,
ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static, PIN_17>>,
Input<'static, PIN_21>,
Output<'static, PIN_20>,
>,
) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<Device<'static>>) -> ! {
stack.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];
let state = singleton!(State::<8, 8>::new());
let (device, runner) = embassy_net_w5500::new(
mac_addr,
state,
ExclusiveDevice::new(spi, cs),
w5500_int,
w5500_reset,
)
.await;
unwrap!(spawner.spawn(ethernet_task(runner)));
// Generate random seed
let seed = rng.next_u64();
// Init network stack
let stack = &*singleton!(Stack::new(
device,
embassy_net::Config::Dhcp(Default::default()),
singleton!(StackResources::<2>::new()),
seed
));
// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
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(embassy_net::SmolDuration::from_secs(10)));
led.set_low();
info!("Connecting...");
let host_addr = embassy_net::Ipv4Address::from_str("192.168.1.110").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(Duration::from_secs(1)).await;
}
}
}
async fn wait_for_config(stack: &'static Stack<Device<'static>>) -> embassy_net::StaticConfig {
loop {
if let Some(config) = stack.config() {
return config.clone();
}
yield_now().await;
}
}

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_net::{Stack, StackResources};
use embassy_net_w5500::*;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Input, Level, Output, Pull};
use embassy_rp::peripherals::{PIN_17, PIN_20, PIN_21, SPI0};
use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
use embedded_hal_async::spi::ExclusiveDevice;
use embedded_io::asynch::Write;
use rand::RngCore;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
macro_rules! singleton {
($val:expr) => {{
type T = impl Sized;
static STATIC_CELL: StaticCell<T> = StaticCell::new();
let (x,) = STATIC_CELL.init(($val,));
x
}};
}
#[embassy_executor::task]
async fn ethernet_task(
runner: Runner<
'static,
ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static, PIN_17>>,
Input<'static, PIN_21>,
Output<'static, PIN_20>,
>,
) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<Device<'static>>) -> ! {
stack.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];
let state = singleton!(State::<8, 8>::new());
let (device, runner) = embassy_net_w5500::new(
mac_addr,
state,
ExclusiveDevice::new(spi, cs),
w5500_int,
w5500_reset,
)
.await;
unwrap!(spawner.spawn(ethernet_task(runner)));
// Generate random seed
let seed = rng.next_u64();
// Init network stack
let stack = &*singleton!(Stack::new(
device,
embassy_net::Config::Dhcp(Default::default()),
singleton!(StackResources::<2>::new()),
seed
));
// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
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];
let mut buf = [0; 4096];
loop {
let mut socket = embassy_net::tcp::TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
led.set_low();
info!("Listening on TCP:1234...");
if let Err(e) = socket.accept(1234).await {
warn!("accept error: {:?}", e);
continue;
}
info!("Received connection from {:?}", socket.remote_endpoint());
led.set_high();
loop {
let n = match socket.read(&mut buf).await {
Ok(0) => {
warn!("read EOF");
break;
}
Ok(n) => n,
Err(e) => {
warn!("{:?}", e);
break;
}
};
info!("rxd {}", core::str::from_utf8(&buf[..n]).unwrap());
if let Err(e) = socket.write_all(&buf[..n]).await {
warn!("write error: {:?}", e);
break;
}
}
}
}
async fn wait_for_config(stack: &'static Stack<Device<'static>>) -> embassy_net::StaticConfig {
loop {
if let Some(config) = stack.config() {
return config.clone();
}
yield_now().await;
}
}

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_futures::yield_now;
use embassy_net::udp::UdpSocket;
use embassy_net::{PacketMetadata, Stack, StackResources};
use embassy_net_w5500::*;
use embassy_rp::clocks::RoscRng;
use embassy_rp::gpio::{Input, Level, Output, Pull};
use embassy_rp::peripherals::{PIN_17, PIN_20, PIN_21, SPI0};
use embassy_rp::spi::{Async, Config as SpiConfig, Spi};
use embedded_hal_async::spi::ExclusiveDevice;
use rand::RngCore;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
macro_rules! singleton {
($val:expr) => {{
type T = impl Sized;
static STATIC_CELL: StaticCell<T> = StaticCell::new();
let (x,) = STATIC_CELL.init(($val,));
x
}};
}
#[embassy_executor::task]
async fn ethernet_task(
runner: Runner<
'static,
ExclusiveDevice<Spi<'static, SPI0, Async>, Output<'static, PIN_17>>,
Input<'static, PIN_21>,
Output<'static, PIN_20>,
>,
) -> ! {
runner.run().await
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<Device<'static>>) -> ! {
stack.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut rng = RoscRng;
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];
let state = singleton!(State::<8, 8>::new());
let (device, runner) = embassy_net_w5500::new(
mac_addr,
state,
ExclusiveDevice::new(spi, cs),
w5500_int,
w5500_reset,
)
.await;
unwrap!(spawner.spawn(ethernet_task(runner)));
// Generate random seed
let seed = rng.next_u64();
// Init network stack
let stack = &*singleton!(Stack::new(
device,
embassy_net::Config::Dhcp(Default::default()),
singleton!(StackResources::<2>::new()),
seed
));
// Launch network task
unwrap!(spawner.spawn(net_task(&stack)));
info!("Waiting for DHCP...");
let cfg = wait_for_config(stack).await;
let local_addr = cfg.address.address();
info!("IP address: {:?}", local_addr);
// Then we can use it!
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
let mut rx_meta = [PacketMetadata::EMPTY; 16];
let mut tx_meta = [PacketMetadata::EMPTY; 16];
let mut buf = [0; 4096];
loop {
let mut socket = UdpSocket::new(
stack,
&mut rx_meta,
&mut rx_buffer,
&mut tx_meta,
&mut tx_buffer,
);
socket.bind(1234).unwrap();
loop {
let (n, ep) = socket.recv_from(&mut buf).await.unwrap();
if let Ok(s) = core::str::from_utf8(&buf[..n]) {
info!("rxd from {}: {}", ep, s);
}
socket.send_to(&buf[..n], ep).await.unwrap();
}
}
}
async fn wait_for_config(stack: &'static Stack<Device<'static>>) -> embassy_net::StaticConfig {
loop {
if let Some(config) = stack.config() {
return config.clone();
}
yield_now().await;
}
}

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rust-toolchain.toml Normal file
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# Before upgrading check that everything is available on all tier1 targets here:
# https://rust-lang.github.io/rustup-components-history
[toolchain]
channel = "nightly-2023-04-04"
components = [ "rust-src", "rustfmt" ]
targets = [
"thumbv6m-none-eabi",
]

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use crate::socket;
use crate::spi::SpiInterface;
use embedded_hal_async::spi::SpiDevice;
pub const MODE: u16 = 0x00;
pub const MAC: u16 = 0x09;
pub const SOCKET_INTR: u16 = 0x18;
pub const PHY_CFG: u16 = 0x2E;
#[repr(u8)]
pub enum RegisterBlock {
Common = 0x00,
Socket0 = 0x01,
TxBuf = 0x02,
RxBuf = 0x03,
}
/// W5500 in MACRAW mode
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct W5500<SPI> {
bus: SpiInterface<SPI>,
}
impl<SPI: SpiDevice> W5500<SPI> {
/// Create and initialize the W5500 driver
pub async fn new(spi: SPI, mac_addr: [u8; 6]) -> Result<W5500<SPI>, SPI::Error> {
let mut bus = SpiInterface(spi);
// Reset device
bus.write_frame(RegisterBlock::Common, MODE, &[0x80])
.await?;
// Enable interrupt pin
bus.write_frame(RegisterBlock::Common, SOCKET_INTR, &[0x01])
.await?;
// Enable receive interrupt
bus.write_frame(
RegisterBlock::Socket0,
socket::SOCKET_INTR_MASK,
&[socket::Interrupt::Receive as u8],
)
.await?;
// Set MAC address
bus.write_frame(RegisterBlock::Common, MAC, &mac_addr)
.await?;
// Set the raw socket RX/TX buffer sizes to 16KB
bus.write_frame(RegisterBlock::Socket0, socket::TXBUF_SIZE, &[16])
.await?;
bus.write_frame(RegisterBlock::Socket0, socket::RXBUF_SIZE, &[16])
.await?;
// MACRAW mode with MAC filtering.
let mode: u8 = (1 << 2) | (1 << 7);
bus.write_frame(RegisterBlock::Socket0, socket::MODE, &[mode])
.await?;
socket::command(&mut bus, socket::Command::Open).await?;
Ok(Self { bus })
}
/// Read bytes from the RX buffer. Returns the number of bytes read.
async fn read_bytes(&mut self, buffer: &mut [u8], offset: u16) -> Result<usize, SPI::Error> {
let rx_size = socket::get_rx_size(&mut self.bus).await? as usize;
let read_buffer = if rx_size > buffer.len() + offset as usize {
buffer
} else {
&mut buffer[..rx_size - offset as usize]
};
let read_ptr = socket::get_rx_read_ptr(&mut self.bus)
.await?
.wrapping_add(offset);
self.bus
.read_frame(RegisterBlock::RxBuf, read_ptr, read_buffer)
.await?;
socket::set_rx_read_ptr(
&mut self.bus,
read_ptr.wrapping_add(read_buffer.len() as u16),
)
.await?;
Ok(read_buffer.len())
}
/// Read an ethernet frame from the device. Returns the number of bytes read.
pub async fn read_frame(&mut self, frame: &mut [u8]) -> Result<usize, SPI::Error> {
let rx_size = socket::get_rx_size(&mut self.bus).await? as usize;
if rx_size == 0 {
return Ok(0);
}
socket::reset_interrupt(&mut self.bus, socket::Interrupt::Receive).await?;
// First two bytes gives the size of the received ethernet frame
let expected_frame_size: usize = {
let mut frame_bytes = [0u8; 2];
assert!(self.read_bytes(&mut frame_bytes[..], 0).await? == 2);
u16::from_be_bytes(frame_bytes) as usize - 2
};
// Read the ethernet frame
let read_buffer = if frame.len() > expected_frame_size {
&mut frame[..expected_frame_size]
} else {
frame
};
let recvd_frame_size = self.read_bytes(read_buffer, 2).await?;
// Register RX as completed
socket::command(&mut self.bus, socket::Command::Receive).await?;
// If the whole frame wasn't read, drop it
if recvd_frame_size < expected_frame_size {
Ok(0)
} else {
Ok(recvd_frame_size)
}
}
/// Write an ethernet frame to the device. Returns number of bytes written
pub async fn write_frame(&mut self, frame: &[u8]) -> Result<usize, SPI::Error> {
let max_size = socket::get_tx_free_size(&mut self.bus).await? as usize;
let write_data = if frame.len() < max_size {
frame
} else {
&frame[..max_size]
};
let write_ptr = socket::get_tx_write_ptr(&mut self.bus).await?;
self.bus
.write_frame(RegisterBlock::TxBuf, write_ptr, write_data)
.await?;
socket::set_tx_write_ptr(
&mut self.bus,
write_ptr.wrapping_add(write_data.len() as u16),
)
.await?;
socket::reset_interrupt(&mut self.bus, socket::Interrupt::SendOk).await?;
socket::command(&mut self.bus, socket::Command::Send).await?;
// Wait for TX to complete
while !socket::is_interrupt(&mut self.bus, socket::Interrupt::SendOk).await? {}
socket::reset_interrupt(&mut self.bus, socket::Interrupt::SendOk).await?;
Ok(write_data.len())
}
pub async fn is_link_up(&mut self) -> bool {
let mut link = [0];
self.bus
.read_frame(RegisterBlock::Common, PHY_CFG, &mut link)
.await
.ok();
link[0] & 1 == 1
}
}

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#![no_std]
/// [`embassy-net`](crates.io/crates/embassy-net) driver for the WIZnet W5500 ethernet chip.
mod device;
mod socket;
mod spi;
use crate::device::W5500;
use embassy_futures::select::{select, Either};
use embassy_net_driver_channel as ch;
use embassy_net_driver_channel::driver::LinkState;
use embassy_time::{Duration, Timer};
use embedded_hal::digital::OutputPin;
use embedded_hal_async::digital::Wait;
use embedded_hal_async::spi::SpiDevice;
const MTU: usize = 1514;
/// Type alias for the embassy-net driver for W5500
pub type Device<'d> = embassy_net_driver_channel::Device<'d, MTU>;
/// Internal state for the embassy-net integration.
pub struct State<const N_RX: usize, const N_TX: usize> {
ch_state: ch::State<MTU, N_RX, N_TX>,
}
impl<const N_RX: usize, const N_TX: usize> State<N_RX, N_TX> {
/// Create a new `State`.
pub const fn new() -> Self {
Self {
ch_state: ch::State::new(),
}
}
}
/// Background runner for the W5500.
///
/// You must call `.run()` in a background task for the W5500 to operate.
pub struct Runner<'d, SPI: SpiDevice, INT: Wait, RST: OutputPin> {
mac: W5500<SPI>,
ch: ch::Runner<'d, MTU>,
int: INT,
_reset: RST,
}
/// You must call this in a background task for the W5500 to operate.
impl<'d, SPI: SpiDevice, INT: Wait, RST: OutputPin> Runner<'d, SPI, INT, RST> {
pub async fn run(mut self) -> ! {
let (state_chan, mut rx_chan, mut tx_chan) = self.ch.split();
loop {
if self.mac.is_link_up().await {
state_chan.set_link_state(LinkState::Up);
loop {
match select(
async {
self.int.wait_for_low().await.ok();
rx_chan.rx_buf().await
},
tx_chan.tx_buf(),
)
.await
{
Either::First(p) => {
if let Ok(n) = self.mac.read_frame(p).await {
rx_chan.rx_done(n);
}
}
Either::Second(p) => {
self.mac.write_frame(p).await.ok();
tx_chan.tx_done();
}
}
}
} else {
state_chan.set_link_state(LinkState::Down);
}
}
}
}
/// Obtain a driver for using the W5500 with [`embassy-net`](crates.io/crates/embassy-net).
pub async fn new<
'a,
const N_RX: usize,
const N_TX: usize,
SPI: SpiDevice,
INT: Wait,
RST: OutputPin,
>(
mac_addr: [u8; 6],
state: &'a mut State<N_RX, N_TX>,
spi_dev: SPI,
int: INT,
mut reset: RST,
) -> (Device<'a>, Runner<'a, SPI, INT, RST>) {
// Reset the W5500.
reset.set_low().ok();
// Ensure the reset is registered.
Timer::after(Duration::from_millis(1)).await;
reset.set_high().ok();
// Wait for the W5500 to achieve PLL lock.
Timer::after(Duration::from_millis(2)).await;
let mac = W5500::new(spi_dev, mac_addr).await.unwrap();
let (runner, device) = ch::new(&mut state.ch_state, mac_addr);
(
device,
Runner {
ch: runner,
mac,
int,
_reset: reset,
},
)
}

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use crate::device::RegisterBlock;
use crate::spi::SpiInterface;
use embedded_hal_async::spi::SpiDevice;
pub const MODE: u16 = 0x00;
pub const COMMAND: u16 = 0x01;
pub const RXBUF_SIZE: u16 = 0x1E;
pub const TXBUF_SIZE: u16 = 0x1F;
pub const TX_FREE_SIZE: u16 = 0x20;
pub const TX_DATA_WRITE_PTR: u16 = 0x24;
pub const RECVD_SIZE: u16 = 0x26;
pub const RX_DATA_READ_PTR: u16 = 0x28;
pub const SOCKET_INTR_MASK: u16 = 0x2C;
#[repr(u8)]
pub enum Command {
Open = 0x01,
Send = 0x20,
Receive = 0x40,
}
pub const INTR: u16 = 0x02;
#[repr(u8)]
pub enum Interrupt {
SendOk = 0b010000_u8,
Receive = 0b00100_u8,
}
pub async fn reset_interrupt<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
code: Interrupt,
) -> Result<(), SPI::Error> {
let data = [code as u8];
bus.write_frame(RegisterBlock::Socket0, INTR, &data).await
}
pub async fn is_interrupt<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
code: Interrupt,
) -> Result<bool, SPI::Error> {
let mut data = [0u8];
bus.read_frame(RegisterBlock::Socket0, INTR, &mut data)
.await?;
Ok(data[0] & code as u8 != 0)
}
pub async fn get_tx_write_ptr<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
bus.read_frame(RegisterBlock::Socket0, TX_DATA_WRITE_PTR, &mut data)
.await?;
Ok(u16::from_be_bytes(data))
}
pub async fn set_tx_write_ptr<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
ptr: u16,
) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
bus.write_frame(RegisterBlock::Socket0, TX_DATA_WRITE_PTR, &data)
.await
}
pub async fn get_rx_read_ptr<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
bus.read_frame(RegisterBlock::Socket0, RX_DATA_READ_PTR, &mut data)
.await?;
Ok(u16::from_be_bytes(data))
}
pub async fn set_rx_read_ptr<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
ptr: u16,
) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
bus.write_frame(RegisterBlock::Socket0, RX_DATA_READ_PTR, &data)
.await
}
pub async fn command<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
command: Command,
) -> Result<(), SPI::Error> {
let data = [command as u8];
bus.write_frame(RegisterBlock::Socket0, COMMAND, &data)
.await
}
pub async fn get_rx_size<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>) -> Result<u16, SPI::Error> {
loop {
// Wait until two sequential reads are equal
let mut res0 = [0u8; 2];
bus.read_frame(RegisterBlock::Socket0, RECVD_SIZE, &mut res0)
.await?;
let mut res1 = [0u8; 2];
bus.read_frame(RegisterBlock::Socket0, RECVD_SIZE, &mut res1)
.await?;
if res0 == res1 {
break Ok(u16::from_be_bytes(res0));
}
}
}
pub async fn get_tx_free_size<SPI: SpiDevice>(
bus: &mut SpiInterface<SPI>,
) -> Result<u16, SPI::Error> {
let mut data = [0; 2];
bus.read_frame(RegisterBlock::Socket0, TX_FREE_SIZE, &mut data)
.await?;
Ok(u16::from_be_bytes(data))
}

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use crate::device::RegisterBlock;
use embedded_hal_async::spi::{Operation, SpiDevice};
#[derive(Debug)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct SpiInterface<SPI>(pub SPI);
impl<SPI: SpiDevice> SpiInterface<SPI> {
pub async fn read_frame(
&mut self,
block: RegisterBlock,
address: u16,
data: &mut [u8],
) -> Result<(), SPI::Error> {
let address_phase = address.to_be_bytes();
let control_phase = [(block as u8) << 3];
let operations = &mut [
Operation::Write(&address_phase),
Operation::Write(&control_phase),
Operation::TransferInPlace(data),
];
self.0.transaction(operations).await
}
pub async fn write_frame(
&mut self,
block: RegisterBlock,
address: u16,
data: &[u8],
) -> Result<(), SPI::Error> {
let address_phase = address.to_be_bytes();
let control_phase = [(block as u8) << 3 | 0b0000_0100];
let data_phase = data;
let operations = &[&address_phase[..], &control_phase, &data_phase];
self.0.write_transaction(operations).await
}
}