From 534cf7c618b0e93881b9757b5608a7ad67606fce Mon Sep 17 00:00:00 2001
From: Satoshi Tanaka <overthere555@gmail.com>
Date: Tue, 2 May 2023 01:30:08 +0900
Subject: [PATCH] Add AP mode example

---
 examples/rpi-pico-w/src/bin/tcp_server_ap.rs | 144 +++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 examples/rpi-pico-w/src/bin/tcp_server_ap.rs

diff --git a/examples/rpi-pico-w/src/bin/tcp_server_ap.rs b/examples/rpi-pico-w/src/bin/tcp_server_ap.rs
new file mode 100644
index 000000000..e43412625
--- /dev/null
+++ b/examples/rpi-pico-w/src/bin/tcp_server_ap.rs
@@ -0,0 +1,144 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+#![feature(async_fn_in_trait)]
+#![allow(incomplete_features)]
+
+use core::str::from_utf8;
+
+use cyw43_pio::PioSpi;
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_net::tcp::TcpSocket;
+use embassy_net::{Config, Stack, StackResources};
+use embassy_rp::gpio::{Level, Output};
+use embassy_rp::peripherals::{DMA_CH0, PIN_23, PIN_25};
+use embassy_rp::pio::{Pio0, PioPeripheral, PioStateMachineInstance, Sm0};
+use embedded_io::asynch::Write;
+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();
+        STATIC_CELL.init_with(move || $val)
+    }};
+}
+
+#[embassy_executor::task]
+async fn wifi_task(
+    runner: cyw43::Runner<
+        'static,
+        Output<'static, PIN_23>,
+        PioSpi<PIN_25, PioStateMachineInstance<Pio0, Sm0>, DMA_CH0>,
+    >,
+) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::task]
+async fn net_task(stack: &'static Stack<cyw43::NetDriver<'static>>) -> ! {
+    stack.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    info!("Hello World!");
+
+    let p = embassy_rp::init(Default::default());
+
+    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.bin --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 (_, sm, _, _, _) = p.PIO0.split();
+    let dma = p.DMA_CH0;
+    let spi = PioSpi::new(sm, cs, p.PIN_24, p.PIN_29, dma);
+
+    let state = singleton!(cyw43::State::new());
+    let (net_device, mut control, runner) = cyw43::new(state, pwr, spi, fw).await;
+    unwrap!(spawner.spawn(wifi_task(runner)));
+
+    control.init(clm).await;
+    control
+        .set_power_management(cyw43::PowerManagementMode::PowerSave)
+        .await;
+
+    // Use a link-local address for communication without DHCP server
+    let config = Config::Static(embassy_net::StaticConfig {
+        address: embassy_net::Ipv4Cidr::new(embassy_net::Ipv4Address::new(169, 254, 1, 1), 16),
+        dns_servers: heapless::Vec::new(),
+        gateway: None,
+    });
+
+    // Generate random seed
+    let seed = 0x0123_4567_89ab_cdef; // chosen by fair dice roll. guarenteed to be random.
+
+    // Init network stack
+    let stack = &*singleton!(Stack::new(
+        net_device,
+        config,
+        singleton!(StackResources::<2>::new()),
+        seed
+    ));
+
+    unwrap!(spawner.spawn(net_task(stack)));
+
+    //control.start_ap_open("cyw43", 5).await;
+    control.start_ap_wpa2("cyw43", "password", 5).await;
+
+    // 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)));
+
+        control.gpio_set(0, false).await;
+        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());
+        control.gpio_set(0, true).await;
+
+        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 {}", from_utf8(&buf[..n]).unwrap());
+
+            match socket.write_all(&buf[..n]).await {
+                Ok(()) => {}
+                Err(e) => {
+                    warn!("write error: {:?}", e);
+                    break;
+                }
+            };
+        }
+    }
+}