From bb24cfd1e8d359332acbc3c659cb9041d993483f Mon Sep 17 00:00:00 2001
From: xoviat <xoviat@users.noreply.github.com>
Date: Sat, 15 Jul 2023 09:32:44 -0500
Subject: [PATCH] stm32/eth: add f4 example

---
 examples/stm32f4/src/bin/eth.rs | 111 ++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 examples/stm32f4/src/bin/eth.rs

diff --git a/examples/stm32f4/src/bin/eth.rs b/examples/stm32f4/src/bin/eth.rs
new file mode 100644
index 00000000..c32d886d
--- /dev/null
+++ b/examples/stm32f4/src/bin/eth.rs
@@ -0,0 +1,111 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_net::tcp::TcpSocket;
+use embassy_net::{Ipv4Address, Stack, StackResources};
+use embassy_stm32::eth::generic_smi::GenericSMI;
+use embassy_stm32::eth::{Ethernet, PacketQueue};
+use embassy_stm32::peripherals::ETH;
+use embassy_stm32::rng::Rng;
+use embassy_stm32::time::mhz;
+use embassy_stm32::{bind_interrupts, eth, Config};
+use embassy_time::{Duration, Timer};
+use embedded_io::asynch::Write;
+use static_cell::make_static;
+use {defmt_rtt as _, panic_probe as _};
+bind_interrupts!(struct Irqs {
+    ETH => eth::InterruptHandler;
+});
+
+type Device = Ethernet<'static, ETH, GenericSMI>;
+
+#[embassy_executor::task]
+async fn net_task(stack: &'static Stack<Device>) -> ! {
+    stack.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) -> ! {
+    let mut config = Config::default();
+    config.rcc.sys_ck = Some(mhz(200));
+    let p = embassy_stm32::init(config);
+
+    info!("Hello World!");
+
+    // Generate random seed.
+    let mut rng = Rng::new(p.RNG);
+    let mut seed = [0; 8];
+    let _ = rng.async_fill_bytes(&mut seed).await;
+    let seed = u64::from_le_bytes(seed);
+
+    let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
+
+    let device = Ethernet::new(
+        make_static!(PacketQueue::<16, 16>::new()),
+        p.ETH,
+        Irqs,
+        p.PA1,
+        p.PA2,
+        p.PC1,
+        p.PA7,
+        p.PC4,
+        p.PC5,
+        p.PG13,
+        p.PB13,
+        p.PG11,
+        GenericSMI,
+        mac_addr,
+        0,
+    );
+
+    let config = embassy_net::Config::dhcpv4(Default::default());
+    //let config = embassy_net::Config::ipv4_static(embassy_net::StaticConfigV4 {
+    //    address: Ipv4Cidr::new(Ipv4Address::new(10, 42, 0, 61), 24),
+    //    dns_servers: Vec::new(),
+    //    gateway: Some(Ipv4Address::new(10, 42, 0, 1)),
+    //});
+
+    // Init network stack
+    let stack = &*make_static!(Stack::new(
+        device,
+        config,
+        make_static!(StackResources::<2>::new()),
+        seed
+    ));
+
+    // Launch network task
+    unwrap!(spawner.spawn(net_task(&stack)));
+
+    info!("Network task initialized");
+
+    // Then we can use it!
+    let mut rx_buffer = [0; 4096];
+    let mut tx_buffer = [0; 4096];
+
+    loop {
+        let mut socket = TcpSocket::new(&stack, &mut rx_buffer, &mut tx_buffer);
+
+        socket.set_timeout(Some(embassy_time::Duration::from_secs(10)));
+
+        let remote_endpoint = (Ipv4Address::new(10, 42, 0, 1), 8000);
+        info!("connecting...");
+        let r = socket.connect(remote_endpoint).await;
+        if let Err(e) = r {
+            info!("connect error: {:?}", e);
+            continue;
+        }
+        info!("connected!");
+        let buf = [0; 1024];
+        loop {
+            let r = socket.write_all(&buf).await;
+            if let Err(e) = r {
+                info!("write error: {:?}", e);
+                continue;
+            }
+            Timer::after(Duration::from_secs(1)).await;
+        }
+    }
+}