140 lines
4.4 KiB
Rust
140 lines
4.4 KiB
Rust
//! This example uses the RP Pico W board Wifi chip (cyw43).
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//! Creates an Access point Wifi network and creates a TCP endpoint on port 1234.
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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#![feature(async_fn_in_trait)]
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#![allow(incomplete_features)]
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use core::str::from_utf8;
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use cyw43_pio::PioSpi;
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_net::tcp::TcpSocket;
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use embassy_net::{Config, Stack, StackResources};
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use embassy_rp::bind_interrupts;
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use embassy_rp::gpio::{Level, Output};
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use embassy_rp::peripherals::{DMA_CH0, PIN_23, PIN_25, PIO0};
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use embassy_rp::pio::{InterruptHandler, Pio};
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use embassy_time::Duration;
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use embedded_io_async::Write;
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use static_cell::make_static;
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use {defmt_rtt as _, panic_probe as _};
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bind_interrupts!(struct Irqs {
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PIO0_IRQ_0 => InterruptHandler<PIO0>;
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});
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#[embassy_executor::task]
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async fn wifi_task(
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runner: cyw43::Runner<'static, Output<'static, PIN_23>, PioSpi<'static, PIN_25, PIO0, 0, DMA_CH0>>,
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) -> ! {
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runner.run().await
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}
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#[embassy_executor::task]
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async fn net_task(stack: &'static Stack<cyw43::NetDriver<'static>>) -> ! {
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stack.run().await
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}
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#[embassy_executor::main]
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async fn main(spawner: Spawner) {
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info!("Hello World!");
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let p = embassy_rp::init(Default::default());
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let fw = include_bytes!("../../../../cyw43-firmware/43439A0.bin");
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let clm = include_bytes!("../../../../cyw43-firmware/43439A0_clm.bin");
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// To make flashing faster for development, you may want to flash the firmwares independently
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// at hardcoded addresses, instead of baking them into the program with `include_bytes!`:
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// probe-rs download 43439A0.bin --format bin --chip RP2040 --base-address 0x10100000
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// probe-rs download 43439A0_clm.bin --format bin --chip RP2040 --base-address 0x10140000
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//let fw = unsafe { core::slice::from_raw_parts(0x10100000 as *const u8, 224190) };
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//let clm = unsafe { core::slice::from_raw_parts(0x10140000 as *const u8, 4752) };
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let pwr = Output::new(p.PIN_23, Level::Low);
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let cs = Output::new(p.PIN_25, Level::High);
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let mut pio = Pio::new(p.PIO0, Irqs);
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let spi = PioSpi::new(&mut pio.common, pio.sm0, pio.irq0, cs, p.PIN_24, p.PIN_29, p.DMA_CH0);
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let state = make_static!(cyw43::State::new());
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let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
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unwrap!(spawner.spawn(wifi_task(runner)));
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control.init(clm).await;
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control
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.set_power_management(cyw43::PowerManagementMode::PowerSave)
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.await;
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// Use a link-local address for communication without DHCP server
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let config = Config::ipv4_static(embassy_net::StaticConfigV4 {
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address: embassy_net::Ipv4Cidr::new(embassy_net::Ipv4Address::new(169, 254, 1, 1), 16),
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dns_servers: heapless::Vec::new(),
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gateway: None,
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});
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// Generate random seed
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let seed = 0x0123_4567_89ab_cdef; // chosen by fair dice roll. guarenteed to be random.
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// Init network stack
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let stack = &*make_static!(Stack::new(
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net_device,
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config,
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make_static!(StackResources::<2>::new()),
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seed
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));
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unwrap!(spawner.spawn(net_task(stack)));
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//control.start_ap_open("cyw43", 5).await;
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control.start_ap_wpa2("cyw43", "password", 5).await;
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// And now we can use it!
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let mut rx_buffer = [0; 4096];
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let mut tx_buffer = [0; 4096];
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let mut buf = [0; 4096];
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loop {
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let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
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socket.set_timeout(Some(Duration::from_secs(10)));
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control.gpio_set(0, false).await;
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info!("Listening on TCP:1234...");
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if let Err(e) = socket.accept(1234).await {
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warn!("accept error: {:?}", e);
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continue;
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}
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info!("Received connection from {:?}", socket.remote_endpoint());
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control.gpio_set(0, true).await;
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loop {
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let n = match socket.read(&mut buf).await {
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Ok(0) => {
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warn!("read EOF");
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break;
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}
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Ok(n) => n,
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Err(e) => {
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warn!("read error: {:?}", e);
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break;
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}
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};
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info!("rxd {}", from_utf8(&buf[..n]).unwrap());
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match socket.write_all(&buf[..n]).await {
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Ok(()) => {}
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Err(e) => {
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warn!("write error: {:?}", e);
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break;
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}
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};
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}
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}
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}
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