embassy/examples/rpi-pico-w/src/main.rs

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#![no_std]
#![no_main]
#![feature(generic_associated_types, type_alias_impl_trait)]
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use core::convert::Infallible;
use core::future::Future;
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use defmt::{assert, assert_eq, panic, *};
use embassy::executor::Spawner;
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use embassy::time::{Duration, Timer};
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use embassy::util::Forever;
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use embassy_net::tcp::TcpSocket;
use embassy_net::{Ipv4Address, Ipv4Cidr, Stack, StackResources};
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use embassy_rp::gpio::{Flex, Level, Output, Pin};
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use embassy_rp::peripherals::{PIN_23, PIN_24, PIN_25, PIN_29};
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use embassy_rp::Peripherals;
use embedded_hal_1::spi::ErrorType;
use embedded_hal_async::spi::{ExclusiveDevice, SpiBusFlush, SpiBusRead, SpiBusWrite};
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use embedded_io::asynch::{Read, Write};
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use {defmt_rtt as _, panic_probe as _};
macro_rules! forever {
($val:expr) => {{
type T = impl Sized;
static FOREVER: Forever<T> = Forever::new();
FOREVER.put_with(move || $val)
}};
}
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#[embassy::task]
async fn wifi_task(
runner: cyw43::Runner<'static, Output<'static, PIN_23>, ExclusiveDevice<MySpi, Output<'static, PIN_25>>>,
) -> ! {
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runner.run().await
}
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#[embassy::task]
async fn net_task(stack: &'static Stack<cyw43::NetDevice<'static>>) -> ! {
stack.run().await
}
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#[embassy::main]
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async fn main(spawner: Spawner, p: Peripherals) {
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info!("Hello World!");
// Include the WiFi firmware and CLM.
let fw = include_bytes!("../../../firmware/43439A0.bin");
let clm = include_bytes!("../../../firmware/43439A0_clm.bin");
// To make flashing faster for development, you may want to flash the firmwares independently
// at hardcoded addresses, instead of baking them into the program with `include_bytes!`:
// probe-rs-cli download 43439A0.bin --format bin --chip RP2040 --base-address 0x10100000
// probe-rs-cli download 43439A0.clm_blob --format bin --chip RP2040 --base-address 0x10140000
//let fw = unsafe { core::slice::from_raw_parts(0x10100000 as *const u8, 224190) };
//let clm = unsafe { core::slice::from_raw_parts(0x10140000 as *const u8, 4752) };
let pwr = Output::new(p.PIN_23, Level::Low);
let cs = Output::new(p.PIN_25, Level::High);
let clk = Output::new(p.PIN_29, Level::Low);
let mut dio = Flex::new(p.PIN_24);
dio.set_low();
dio.set_as_output();
let bus = MySpi { clk, dio };
let spi = ExclusiveDevice::new(bus, cs);
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let state = forever!(cyw43::State::new());
let (mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
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spawner.spawn(wifi_task(runner)).unwrap();
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let net_device = control.init(clm).await;
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//control.join_open(env!("WIFI_NETWORK")).await;
control.join_wpa2(env!("WIFI_NETWORK"), env!("WIFI_PASSWORD")).await;
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let config = embassy_net::ConfigStrategy::Dhcp;
//let config = embassy_net::ConfigStrategy::Static(embassy_net::Config {
// address: Ipv4Cidr::new(Ipv4Address::new(192, 168, 69, 2), 24),
// dns_servers: Vec::new(),
// gateway: Some(Ipv4Address::new(192, 168, 69, 1)),
//});
// Generate random seed
let seed = 0x0123_4567_89ab_cdef; // chosen by fair dice roll. guarenteed to be random.
// Init network stack
let stack = &*forever!(Stack::new(
net_device,
config,
forever!(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]);
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match socket.write_all(&buf[..n]).await {
Ok(()) => {}
Err(e) => {
warn!("write error: {:?}", e);
break;
}
};
}
}
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}
struct MySpi {
/// SPI clock
clk: Output<'static, PIN_29>,
/// 4 signals, all in one!!
/// - SPI MISO
/// - SPI MOSI
/// - IRQ
/// - strap to set to gSPI mode on boot.
dio: Flex<'static, PIN_24>,
}
impl ErrorType for MySpi {
type Error = Infallible;
}
impl SpiBusFlush for MySpi {
type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>>
where
Self: 'a;
fn flush<'a>(&'a mut self) -> Self::FlushFuture<'a> {
async move { Ok(()) }
}
}
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impl SpiBusRead<u32> for MySpi {
type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>>
where
Self: 'a;
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fn read<'a>(&'a mut self, words: &'a mut [u32]) -> Self::ReadFuture<'a> {
async move {
self.dio.set_as_input();
for word in words {
let mut w = 0;
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for _ in 0..32 {
w = w << 1;
// rising edge, sample data
if self.dio.is_high() {
w |= 0x01;
}
self.clk.set_high();
// falling edge
self.clk.set_low();
}
*word = w
}
Ok(())
}
}
}
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impl SpiBusWrite<u32> for MySpi {
type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>>
where
Self: 'a;
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fn write<'a>(&'a mut self, words: &'a [u32]) -> Self::WriteFuture<'a> {
async move {
self.dio.set_as_output();
for word in words {
let mut word = *word;
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for _ in 0..32 {
// falling edge, setup data
self.clk.set_low();
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if word & 0x8000_0000 == 0 {
self.dio.set_low();
} else {
self.dio.set_high();
}
// rising edge
self.clk.set_high();
word = word << 1;
}
}
self.clk.set_low();
self.dio.set_as_input();
Ok(())
}
}
}