From 1185217fd090401873bc04fff3a271cb7a66dc8e Mon Sep 17 00:00:00 2001
From: Netwxx <netwxxt@gmail.com>
Date: Wed, 5 Aug 2026 14:35:48 -0700
Subject: [PATCH] Initial testing, have a blinking LED

---
 .cargo/config.toml  | 19 +++++++++++++++++++
 .envrc              |  1 +
 .gitignore          |  4 ++++
 Cargo.toml          | 27 +++++++++++++++++++++++++++
 build.rs            |  3 +++
 rust-toolchain.toml |  2 ++
 sdkconfig.defaults  | 12 ++++++++++++
 src/main.rs         | 20 ++++++++++++++++++++
 8 files changed, 88 insertions(+)
 create mode 100644 .cargo/config.toml
 create mode 100644 .envrc
 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..4b8eb47
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,19 @@
+[build]
+target = "xtensa-esp32s3-espidf"
+
+[target.'cfg(target_os = "espidf")']
+linker = "ldproxy"
+runner = "espflash flash --monitor"
+rustflags = [ "--cfg",  "espidf_time64"]
+
+[unstable]
+build-std = ["std", "panic_abort"]
+
+[env]
+MCU = "esp32s3"
+ESP_IDF_VERSION = "v5.5.3"
+ESP_IDF_TOOLS_INSTALL_DIR = "workspace"
+
+# Uncomment this if you have moved the target dir by setting CARGO_TARGET_DIR or similar.
+# Required for now due to embuild limitations.
+#CARGO_WORKSPACE_DIR = { value = "", relative = true }
diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..f09569e
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+source /home/wyatt/Applications/esp32/export-esp.sh
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..dcf7a5e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,27 @@
+[package]
+name = "esp32_experiments"
+version = "0.1.0"
+authors = ["Netwxx <netwxxt@gmail.com>"]
+edition = "2021"
+resolver = "2"
+rust-version = "1.82"
+
+[[bin]]
+name = "esp32_experiments"
+harness = false # do not use the built-in cargo test harness -> resolve rust-analyzer errors
+
+[profile.release]
+opt-level = "s"
+
+[profile.dev]
+debug = true    # Symbols are nice, and they don't increase the size on Flash
+opt-level = "z"
+
+[dependencies]
+log = "0.4"
+esp-idf-svc = { version = "0.52.1", features = ["critical-section", "embassy-time-driver", "embassy-sync"] }
+# Remove `generic-queue-8` if you plan to use `embassy-time` WITH `embassy-executor`
+embassy-time = { version = "0.5", features = ["generic-queue-8"] }
+
+[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..ca7a8a8
--- /dev/null
+++ b/sdkconfig.defaults
@@ -0,0 +1,12 @@
+# 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
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..29781a0
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,20 @@
+use esp_idf_svc::hal::delay::FreeRtos;
+use esp_idf_svc::hal::gpio::PinDriver;
+use esp_idf_svc::hal::peripherals::Peripherals;
+
+fn main() {
+    esp_idf_svc::sys::link_patches();
+    esp_idf_svc::log::EspLogger::initialize_default();
+    log::info!("Hello, world!");
+
+    let peripherals = Peripherals::take().unwrap();
+    let mut led = PinDriver::output(peripherals.pins.gpio17).unwrap();
+
+    loop {
+        led.set_high().unwrap();
+        FreeRtos::delay_ms(500);
+        led.set_low().unwrap();
+        FreeRtos::delay_ms(500);
+        log::info!("Blink");
+    }
+}
\ No newline at end of file