From 777c72cbfb7bbb9b235cc7ec2da031cb93cc5bab Mon Sep 17 00:00:00 2001
From: Wyatt Marchand <netwxxt@gmail.com>
Date: Mon, 24 Aug 2026 19:30:05 -0700
Subject: [PATCH] Finally compiles

---
 .cargo/config.toml  | 12 +++++++++
 .gitignore          |  4 +++
 Cargo.toml          | 19 +++++++++++++
 build.rs            |  3 +++
 rust-toolchain.toml |  2 ++
 sdkconfig.defaults  | 16 +++++++++++
 src/main.rs         | 65 +++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 121 insertions(+)
 create mode 100644 .cargo/config.toml
 create mode 100644 .gitignore
 create mode 100644 Cargo.toml
 create mode 100644 build.rs
 create mode 100644 rust-toolchain.toml
 create mode 100644 sdkconfig.defaults
 create mode 100644 src/main.rs

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..c7099c4
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,12 @@
+[build]
+target = "xtensa-esp32s3-espidf"
+
+[target.xtensa-esp32s3-espidf]
+linker = "ldproxy"
+
+[unstable]
+build-std = ["std", "panic_abort"]
+
+[env]
+MCU = "esp32s3"
+ESP_IDF_VERSION = "v5.3.1"
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..73a638b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/.vscode
+/.embuild
+/target
+/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..20276da
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "hello-eth"
+version = "0.1.0"
+edition = "2021"
+
+[[bin]]
+name = "hello-eth"
+harness = false
+
+[profile.release]
+opt-level = "s"
+
+[dependencies]
+esp-idf-svc = { version = "0.51", features = ["std"] }
+anyhow = "1"
+log = "0.4"
+
+[build-dependencies]
+embuild = "0.33"
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..112ec3f
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,3 @@
+fn main() {
+    embuild::espidf::sysenv::output();
+}
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..a2f5ab5
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "esp"
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
new file mode 100644
index 0000000..a227535
--- /dev/null
+++ b/sdkconfig.defaults
@@ -0,0 +1,16 @@
+# Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
+# You might have to increase this further if you allocate large stack variables in the main task
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+
+# Increase a bit these stack sizes as they are also a bit too small by default
+CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
+CONFIG_FREERTOS_IDLE_TASK_STACKSIZE=4096
+
+# You might have to increase this further if you spawn your own Rust threads 
+# that allocate large stack variables; or better yet - use 
+# `std::thread::Builder::new().stack_size(XXX)` for spawning
+CONFIG_PTHREAD_TASK_STACK_SIZE_DEFAULT=4096
+
+CONFIG_ETH_SPI_ETHERNET_W5500=y
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8000
+CONFIG_HTTPD_MAX_REQ_HDR_LEN=1024
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..0140278
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,65 @@
+use std::thread;
+use std::time::Duration;
+
+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, SpiDriver};
+use esp_idf_svc::http::server::{Configuration as HttpServerConfig, EspHttpServer};
+use esp_idf_svc::http::Method;
+use esp_idf_svc::io::Write;
+use log::info;
+
+fn main() -> anyhow::Result<()> {
+    esp_idf_svc::sys::link_patches();
+    esp_idf_svc::log::EspLogger::initialize_default();
+
+    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 (sdo)
+        Some(pins.gpio12), // MISO (sdi)
+        &DriverConfig::new(),
+    )?;
+
+    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,               // phy addr — default
+        sysloop.clone(),
+    )?;
+
+    let eth = EspEth::wrap(eth_driver)?;
+    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);
+
+    let mut server = EspHttpServer::new(&HttpServerConfig::default())?;
+    server.fn_handler("/", Method::Get, |req| {
+        let html = "<html><body><h1>Hello World</h1></body></html>";
+        req.into_ok_response()?.write_all(html.as_bytes())?;
+        anyhow::Ok(())
+    })?;
+
+    info!("Server up. Browse to http://{}/", ip_info.ip);
+
+    loop {
+        thread::sleep(Duration::from_secs(1));
+    }
+}