Base code and whatnot

src/main.rs

@@ -1,10 +1,68 @@
-fn main() {
-    // It is necessary to call this function once. Otherwise, some patches to the runtime
-    // implemented by esp-idf-sys might not link properly. See https://github.com/esp-rs/esp-idf-template/issues/71
-    esp_idf_svc::sys::link_patches();
+use std::ffi::CString;
+use std::thread;
+use std::time::Duration;
 
-    // Bind the log crate to the ESP Logging facilities
+use esp_idf_svc::eth::{BlockingEth, EspEth, EthDriver, SpiEthChipset};
+use esp_idf_svc::eventloop::EspSystemEventLoop;
+use esp_idf_svc::hal::peripherals::Peripherals;
+use esp_idf_svc::hal::prelude::*;
+use esp_idf_svc::hal::spi::{config::DriverConfig, Dma, SpiDriver};
+use esp_idf_svc::handle::RawHandle; // brings .handle() into scope for EspNetif
+use log::info;
+
+fn main() -> anyhow::Result<()> {
+    esp_idf_svc::sys::link_patches();
     esp_idf_svc::log::EspLogger::initialize_default();
 
-    log::info!("Hello, world!");
+    let peripherals = Peripherals::take()?;
+    let sysloop = EspSystemEventLoop::take()?;
+    let pins = peripherals.pins;
+
+    let spi_driver = SpiDriver::new(
+        peripherals.spi2,
+        pins.gpio13,       // SCLK
+        pins.gpio11,       // MOSI
+        Some(pins.gpio12), // MISO
+        &DriverConfig {
+            dma: Dma::Auto(4096), // required — default (no DMA) can't move full ethernet frames
+            ..Default::default()
+        },
+    )?;
+
+    let eth_driver = EthDriver::new_spi(
+        spi_driver,
+        pins.gpio10,       // INT
+        Some(pins.gpio14), // CS
+        Some(pins.gpio9),  // RST
+        SpiEthChipset::W5500,
+        20.MHz().into(),
+        Some(&[0x02, 0x00, 0x00, 0x12, 0x34, 0x56]), // locally-administered MAC
+        None,                                        // default PHY address
+        sysloop.clone(),
+    )?;
+
+    let eth = EspEth::wrap(eth_driver)?;
+
+    // Set hostname BEFORE starting — esp-idf-svc's safe NetifConfiguration has no
+    // hostname field, so this goes through the raw ESP-IDF binding. It must happen
+    // before eth.start(), otherwise it won't be included in the DHCP request and
+    // your router/OS will show a generic name instead (max 32 bytes).
+    let hostname = CString::new("esp32-eth-device")?;
+    unsafe {
+        esp_idf_svc::sys::esp_netif_set_hostname(eth.netif().handle(), hostname.as_ptr());
+    }
+
+    let mut eth = BlockingEth::wrap(eth, sysloop)?;
+
+    info!("Starting eth...");
+    eth.start()?;
+    info!("Waiting for DHCP lease...");
+    eth.wait_netif_up()?;
+
+    let ip_info = eth.eth().netif().get_ip_info()?;
+    info!("Got IP: {:?}", ip_info);
+
+    loop {
+        thread::sleep(Duration::from_secs(1));
+    }
 }