stm32/usb_otg: Add F4 usb_ethernet example

This commit is contained in:
chemicstry 2023-01-18 02:37:02 +02:00
parent f07e59b24a
commit 7d34f4f538
2 changed files with 174 additions and 1 deletions

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@ -4,13 +4,13 @@ name = "embassy-stm32f4-examples"
version = "0.1.0"
license = "MIT OR Apache-2.0"
[dependencies]
embassy-sync = { version = "0.1.0", path = "../../embassy-sync", features = ["defmt"] }
embassy-executor = { version = "0.1.0", path = "../../embassy-executor", features = ["defmt", "integrated-timers"] }
embassy-time = { version = "0.1.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "unstable-traits", "tick-hz-32_768"] }
embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["nightly", "unstable-traits", "defmt", "stm32f429zi", "unstable-pac", "memory-x", "time-driver-any", "exti"] }
embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"] }
embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "nightly"], optional = true }
defmt = "0.3"
defmt-rtt = "0.4"
@ -27,5 +27,9 @@ embedded-storage = "0.3.0"
micromath = "2.0.0"
static_cell = "1.0"
[[bin]]
name = "usb_ethernet"
required-features = ["embassy-net"]
[profile.release]
debug = 2

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@ -0,0 +1,169 @@
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_net::tcp::TcpSocket;
use embassy_net::{Stack, StackResources};
use embassy_stm32::rng::Rng;
use embassy_stm32::time::mhz;
use embassy_stm32::usb_otg::Driver;
use embassy_stm32::{interrupt, Config};
use embassy_usb::class::cdc_ncm::embassy_net::{Device, Runner, State as NetState};
use embassy_usb::class::cdc_ncm::{CdcNcmClass, State};
use embassy_usb::{Builder, UsbDevice};
use embedded_io::asynch::Write;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
type UsbDriver = Driver<'static, embassy_stm32::peripherals::USB_OTG_FS>;
macro_rules! singleton {
($val:expr) => {{
type T = impl Sized;
static STATIC_CELL: StaticCell<T> = StaticCell::new();
let (x,) = STATIC_CELL.init(($val,));
x
}};
}
const MTU: usize = 1514;
#[embassy_executor::task]
async fn usb_task(mut device: UsbDevice<'static, UsbDriver>) -> ! {
device.run().await
}
#[embassy_executor::task]
async fn usb_ncm_task(class: Runner<'static, UsbDriver, MTU>) -> ! {
class.run().await
}
#[embassy_executor::task]
async fn net_task(stack: &'static Stack<Device<'static, MTU>>) -> ! {
stack.run().await
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
info!("Hello World!");
let mut config = Config::default();
config.rcc.pll48 = true;
config.rcc.sys_ck = Some(mhz(48));
let p = embassy_stm32::init(config);
// Create the driver, from the HAL.
let irq = interrupt::take!(OTG_FS);
let ep_out_buffer = &mut singleton!([0; 256])[..];
let driver = Driver::new_fs(p.USB_OTG_FS, irq, p.PA12, p.PA11, ep_out_buffer);
// Create embassy-usb Config
let mut config = embassy_usb::Config::new(0xc0de, 0xcafe);
config.manufacturer = Some("Embassy");
config.product = Some("USB-Ethernet example");
config.serial_number = Some("12345678");
config.max_power = 100;
config.max_packet_size_0 = 64;
// Required for Windows support.
config.composite_with_iads = true;
config.device_class = 0xEF;
config.device_sub_class = 0x02;
config.device_protocol = 0x01;
// Create embassy-usb DeviceBuilder using the driver and config.
let mut builder = Builder::new(
driver,
config,
&mut singleton!([0; 256])[..],
&mut singleton!([0; 256])[..],
&mut singleton!([0; 256])[..],
&mut singleton!([0; 128])[..],
None,
);
// Our MAC addr.
let our_mac_addr = [0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC];
// Host's MAC addr. This is the MAC the host "thinks" its USB-to-ethernet adapter has.
let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
// Create classes on the builder.
let class = CdcNcmClass::new(&mut builder, singleton!(State::new()), host_mac_addr, 64);
// Build the builder.
let usb = builder.build();
unwrap!(spawner.spawn(usb_task(usb)));
let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(singleton!(NetState::new()), our_mac_addr);
unwrap!(spawner.spawn(usb_ncm_task(runner)));
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)),
//});
// Generate random seed
let mut rng = Rng::new(p.RNG);
let mut seed = [0; 8];
unwrap!(rng.async_fill_bytes(&mut seed).await);
let seed = u64::from_le_bytes(seed);
// Init network stack
let stack = &*singleton!(Stack::new(
device,
config,
singleton!(StackResources::<1, 2, 8>::new()),
seed
));
unwrap!(spawner.spawn(net_task(stack)));
// And now we can use it!
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
let mut buf = [0; 4096];
loop {
let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
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());
loop {
let n = match socket.read(&mut buf).await {
Ok(0) => {
warn!("read EOF");
break;
}
Ok(n) => n,
Err(e) => {
warn!("read error: {:?}", e);
break;
}
};
info!("rxd {:02x}", &buf[..n]);
match socket.write_all(&buf[..n]).await {
Ok(()) => {}
Err(e) => {
warn!("write error: {:?}", e);
break;
}
};
}
}
}