Auto-generate project

.cargo/config.toml

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+[target.xtensa-esp32s3-none-elf]
+runner = "probe-rs run --chip=esp32s3 --preverify --always-print-stacktrace --no-location --catch-hardfault"
+
+[env]
+DEFMT_LOG="info"
+
+[build]
+rustflags = [
+  "-C", "link-arg=-nostartfiles",
+]
+
+target = "xtensa-esp32s3-none-elf"
+
+[unstable]
+build-std = ["alloc", "core"]

.clippy.toml

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+stack-size-threshold = 1024

.gitignore

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+# will have compiled files and executables
+debug/
+target/
+
+# Editor configuration
+.vscode/
+.zed/
+.helix/
+.nvim.lua
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+
+# Ignore .DS_Store file in mac
+**/.DS_Store
+
+# Emacs undo-tree turds
+**/*.~undo-tree~

Cargo.toml

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+[package]
+edition      = "2024"
+name         = "padmapper"
+rust-version = "1.88"
+version      = "0.1.0"
+
+[[bin]]
+name = "padmapper"
+path = "./src/bin/main.rs"
+
+[dependencies]
+esp-hal = { version = "~1.0", features = ["defmt", "esp32s3", "unstable"] }
+
+esp-rtos = { version = "0.2.0", features = [
+  "defmt",
+  "embassy",
+  "esp-alloc",
+  "esp32s3",
+] }
+
+defmt                  = "1.0.1"
+esp-bootloader-esp-idf = { version = "0.4.0", features = ["defmt", "esp32s3"] }
+
+embassy-executor = { version = "0.9.1", features = ["defmt"] }
+embassy-time     = { version = "0.5.0", features = ["defmt"] }
+esp-alloc        = { version = "0.9.0", features = ["defmt"] }
+rtt-target       = { version = "0.6.2", features = ["defmt"] }
+
+critical-section = "1.2.0"
+static_cell      = "2.1.1"
+
+
+[profile.dev]
+# Rust debug is too slow.
+# For debug builds always builds with some optimization
+opt-level = "s"
+
+[profile.release]
+codegen-units    = 1     # LLVM can perform better optimizations using a single thread
+debug            = 2
+debug-assertions = false
+incremental      = false
+lto              = 'fat'
+opt-level        = 's'
+overflow-checks  = false

build.rs

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+fn main() {
+    linker_be_nice();
+    println!("cargo:rustc-link-arg=-Tdefmt.x");
+    // make sure linkall.x is the last linker script (otherwise might cause problems with flip-link)
+    println!("cargo:rustc-link-arg=-Tlinkall.x");
+}
+
+fn linker_be_nice() {
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() > 1 {
+        let kind = &args[1];
+        let what = &args[2];
+
+        match kind.as_str() {
+            "undefined-symbol" => match what.as_str() {
+                what if what.starts_with("_defmt_") => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `defmt` not found - make sure `defmt.x` is added as a linker script and you have included `use defmt_rtt as _;`"
+                    );
+                    eprintln!();
+                }
+                "_stack_start" => {
+                    eprintln!();
+                    eprintln!("💡 Is the linker script `linkall.x` missing?");
+                    eprintln!();
+                }
+                what if what.starts_with("esp_rtos_") => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `esp-radio` has no scheduler enabled. Make sure you have initialized `esp-rtos` or provided an external scheduler."
+                    );
+                    eprintln!();
+                }
+                "embedded_test_linker_file_not_added_to_rustflags" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 `embedded-test` not found - make sure `embedded-test.x` is added as a linker script for tests"
+                    );
+                    eprintln!();
+                }
+                "free"
+                | "malloc"
+                | "calloc"
+                | "get_free_internal_heap_size"
+                | "malloc_internal"
+                | "realloc_internal"
+                | "calloc_internal"
+                | "free_internal" => {
+                    eprintln!();
+                    eprintln!(
+                        "💡 Did you forget the `esp-alloc` dependency or didn't enable the `compat` feature on it?"
+                    );
+                    eprintln!();
+                }
+                _ => (),
+            },
+            // we don't have anything helpful for "missing-lib" yet
+            _ => {
+                std::process::exit(1);
+            }
+        }
+
+        std::process::exit(0);
+    }
+
+    println!(
+        "cargo:rustc-link-arg=-Wl,--error-handling-script={}",
+        std::env::current_exe().unwrap().display()
+    );
+}

rust-toolchain.toml

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+[toolchain]
+channel = "esp"

src/bin/main.rs

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+#![no_std]
+#![no_main]
+#![deny(
+    clippy::mem_forget,
+    reason = "mem::forget is generally not safe to do with esp_hal types, especially those \
+    holding buffers for the duration of a data transfer."
+)]
+#![deny(clippy::large_stack_frames)]
+
+use defmt::info;
+use embassy_executor::Spawner;
+use embassy_time::{Duration, Timer};
+use esp_hal::clock::CpuClock;
+use esp_hal::timer::timg::TimerGroup;
+
+#[panic_handler]
+fn panic(_: &core::panic::PanicInfo) -> ! {
+    loop {}
+}
+
+extern crate alloc;
+
+// This creates a default app-descriptor required by the esp-idf bootloader.
+// For more information see: <https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/app_image_format.html#application-description>
+esp_bootloader_esp_idf::esp_app_desc!();
+
+#[allow(
+    clippy::large_stack_frames,
+    reason = "it's not unusual to allocate larger buffers etc. in main"
+)]
+#[esp_rtos::main]
+async fn main(spawner: Spawner) -> ! {
+    // generator version: 1.2.0
+
+    rtt_target::rtt_init_defmt!();
+
+    let config = esp_hal::Config::default().with_cpu_clock(CpuClock::max());
+    let peripherals = esp_hal::init(config);
+
+    esp_alloc::heap_allocator!(#[esp_hal::ram(reclaimed)] size: 73744);
+
+    let timg0 = TimerGroup::new(peripherals.TIMG0);
+    esp_rtos::start(timg0.timer0);
+
+    info!("Embassy initialized!");
+
+    // TODO: Spawn some tasks
+    let _ = spawner;
+
+    loop {
+      info!("Hello world!");
+      Timer::after(Duration::from_secs(1)).await;
+    }
+
+    // for inspiration have a look at the examples at https://github.com/esp-rs/esp-hal/tree/esp-hal-v1.0.0/examples
+}

src/lib.rs

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+#![no_std]