3 files changed, 135 insertions, 1 deletions

diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index eb0437bc2..8965b312c 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -911,6 +911,24 @@ fn main() {
         (("eth", "TXD2"), quote!(crate::eth::TXD2Pin)),
         (("eth", "TXD3"), quote!(crate::eth::TXD3Pin)),
         (("eth", "TX_EN"), quote!(crate::eth::TXEnPin)),
+        (("eth", "MII_REF_CLK"), quote!(crate::eth::RefClkPin)),
+        (("eth", "MII_RX_CLK"), quote!(crate::eth::RXClkPin)),
+        (("eth", "MII_TX_CLK"), quote!(crate::eth::TXClkPin)),
+        (("eth", "MII_MDIO"), quote!(crate::eth::MDIOPin)),
+        (("eth", "MII_MDC"), quote!(crate::eth::MDCPin)),
+        (("eth", "MII_CRS_DV"), quote!(crate::eth::CRSPin)),
+        (("eth", "MII_RX_DV"), quote!(crate::eth::RXDVPin)),
+        (("eth", "MII_RXD0"), quote!(crate::eth::RXD0Pin)),
+        (("eth", "MII_RXD1"), quote!(crate::eth::RXD1Pin)),
+        (("eth", "MII_RXD2"), quote!(crate::eth::RXD2Pin)),
+        (("eth", "MII_RXD3"), quote!(crate::eth::RXD3Pin)),
+        (("eth", "MII_TXD0"), quote!(crate::eth::TXD0Pin)),
+        (("eth", "MII_TXD1"), quote!(crate::eth::TXD1Pin)),
+        (("eth", "MII_TXD2"), quote!(crate::eth::TXD2Pin)),
+        (("eth", "MII_TXD3"), quote!(crate::eth::TXD3Pin)),
+        (("eth", "MII_TX_EN"), quote!(crate::eth::TXEnPin)),
+        (("eth", "RMII_REF_CLK"), quote!(crate::eth::RefClkPin)),
+        (("eth", "RMII_CRS_DV"), quote!(crate::eth::CRSPin)),
         (("fmc", "A0"), quote!(crate::fmc::A0Pin)),
         (("fmc", "A1"), quote!(crate::fmc::A1Pin)),
         (("fmc", "A2"), quote!(crate::fmc::A2Pin)),
diff --git a/examples/stm32h7rs/Cargo.toml b/examples/stm32h7rs/Cargo.toml
index 6564fffbf..a47dbe21e 100644
--- a/examples/stm32h7rs/Cargo.toml
+++ b/examples/stm32h7rs/Cargo.toml
@@ -10,7 +10,7 @@ embassy-stm32 = { version = "0.2.0", path = "../../embassy-stm32", features = ["
 embassy-sync = { version = "0.6.2", path = "../../embassy-sync", features = ["defmt"] }
 embassy-executor = { version = "0.7.0", path = "../../embassy-executor", features = ["task-arena-size-32768", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt"] }
 embassy-time = { version = "0.4.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
-embassy-net = { version = "0.7.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "proto-ipv6", "dns"] }
+embassy-net = { version = "0.7.0", path = "../../embassy-net", features = ["defmt", "udp", "medium-ethernet", "medium-ip", "proto-ipv4"] }
 embassy-usb = { version = "0.4.0", path = "../../embassy-usb", features = ["defmt"] }
 embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 
diff --git a/examples/stm32h7rs/src/bin/eth.rs b/examples/stm32h7rs/src/bin/eth.rs
new file mode 100644
index 000000000..1bb748faa
--- /dev/null
+++ b/examples/stm32h7rs/src/bin/eth.rs
@@ -0,0 +1,116 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_net::udp::{PacketMetadata, UdpSocket};
+use embassy_net::{Ipv4Cidr, Ipv4Address, StackResources};
+use embassy_stm32::eth::{Ethernet, GenericPhy, PacketQueue};
+use embassy_stm32::peripherals::ETH;
+use embassy_stm32::rng::Rng;
+use embassy_stm32::{bind_interrupts, eth, peripherals, rng, Config};
+use embassy_time::Timer;
+use heapless::Vec;
+use rand_core::RngCore;
+use static_cell::StaticCell;
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    ETH => eth::InterruptHandler;
+    RNG => rng::InterruptHandler<peripherals::RNG>;
+});
+
+type Device = Ethernet<'static, ETH, GenericPhy>;
+
+#[embassy_executor::task]
+async fn net_task(mut runner: embassy_net::Runner<'static, Device>) -> ! {
+    runner.run().await
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) -> ! {
+    let mut config = Config::default();
+    {
+        use embassy_stm32::rcc::*;
+        config.rcc.hsi = Some(HSIPrescaler::DIV1);
+        config.rcc.csi = true;
+        config.rcc.hsi48 = Some(Default::default()); // needed for RNG
+        config.rcc.pll1 = Some(Pll {
+            source: PllSource::HSI,
+            prediv: PllPreDiv::DIV4,
+            mul: PllMul::MUL50,
+            divp: Some(PllDiv::DIV2),
+            divq: None,
+            divr: None,
+        });
+        config.rcc.sys = Sysclk::PLL1_P; // 400 Mhz
+        config.rcc.ahb_pre = AHBPrescaler::DIV2; // 200 Mhz
+        config.rcc.apb1_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb2_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb4_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.apb5_pre = APBPrescaler::DIV2; // 100 Mhz
+        config.rcc.voltage_scale = VoltageScale::HIGH;
+    }
+    let p = embassy_stm32::init(config);
+    info!("Hello World!");
+
+    // Generate random seed.
+    let mut rng = Rng::new(p.RNG, Irqs);
+    let mut seed = [0; 8];
+    rng.fill_bytes(&mut seed);
+    let seed = u64::from_le_bytes(seed);
+
+    let mac_addr = [0x00, 0x00, 0xDE, 0xAD, 0xBE, 0xEF];
+
+    static PACKETS: StaticCell<PacketQueue<4, 4>> = StaticCell::new();
+    let device = Ethernet::new(
+        PACKETS.init(PacketQueue::<4, 4>::new()),
+        p.ETH,
+        Irqs,
+        p.PB6,
+        p.PA2,
+        p.PG6,
+        p.PA7,
+        p.PG4,
+        p.PG5,
+        p.PG13,
+        p.PG12,
+        p.PG11,
+        GenericPhy::new(0),    
+        mac_addr,
+    );
+
+    // Have to use UDP w/ static config to fit in internal flash
+    // 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
+    static RESOURCES: StaticCell<StackResources<3>> = StaticCell::new();
+    let (stack, runner) = embassy_net::new(device, config, RESOURCES.init(StackResources::new()), seed);
+
+    // Launch network task
+    unwrap!(spawner.spawn(net_task(runner)));
+
+    // Ensure DHCP configuration is up before trying connect
+    stack.wait_config_up().await;
+
+    info!("Network task initialized");
+
+    // Then we can use it!
+    let mut rx_meta = [PacketMetadata::EMPTY; 16];
+    let mut rx_buffer = [0; 1024];
+    let mut tx_meta = [PacketMetadata::EMPTY; 16];
+    let mut tx_buffer = [0; 1024];
+
+    let remote_endpoint = (Ipv4Address::new(10, 42, 0, 1), 8000);
+    let socket = UdpSocket::new(stack, &mut rx_meta, &mut rx_buffer, &mut tx_meta, &mut tx_buffer);
+    loop {
+        // You need to start a server on the host machine, for example: `nc -lu 8000`
+        socket.send_to(b"Hello, world", remote_endpoint).await.expect("Buffer sent");
+        Timer::after_secs(1).await;
+    }
+}