From 93f2bbde47997894125825505a67aa2f48d66972 Mon Sep 17 00:00:00 2001
From: Nick Mello <nick@nmello.dev>
Date: Fri, 10 Jul 2026 23:17:03 -0500
Subject: [PATCH] Initial commit

Signed-off-by: Nicholas Mello <nick@nmello.dev>
---
 .cargo/config.toml |    8 +
 .gitignore         |    1 +
 Cargo.lock         | 1531 ++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml         |   13 +
 build.rs           |   36 ++
 memory.x           |   17 +
 src/main.rs        |   29 +
 7 files changed, 1635 insertions(+)
 create mode 100644 .cargo/config.toml
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 build.rs
 create mode 100644 memory.x
 create mode 100644 src/main.rs

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..3d7d617
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,8 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+runner = "probe-rs run --chip RP2040"
+
+[build]
+target = "thumbv6m-none-eabi"        # Cortex-M0 and Cortex-M0+
+
+[env]
+DEFMT_LOG = "debug"
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..4f5a90d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1531 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..d793ab6
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "arcade-keyboard"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+cortex-m-rt = "0.7.5"
+defmt = "1.1.1"
+defmt-rtt = "1.3.0"
+embassy-executor = { version = "0.10.0", features = ["executor-thread", "platform-cortex-m"] }
+embassy-rp = { version = "0.10.0", features = ["chrono", "defmt", "rp2040", "rt", "time-driver", "critical-section-impl"] }
+embassy-time = "0.5.1"
+panic-probe = { version = "1.0.0", features = ["defmt"] }
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..3f915f9
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,36 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+
+    println!("cargo:rustc-link-arg-bins=--nmagic");
+    println!("cargo:rustc-link-arg-bins=-Tlink.x");
+    println!("cargo:rustc-link-arg-bins=-Tlink-rp.x");
+    println!("cargo:rustc-link-arg-bins=-Tdefmt.x");
+}
diff --git a/memory.x b/memory.x
new file mode 100644
index 0000000..ef19dff
--- /dev/null
+++ b/memory.x
@@ -0,0 +1,17 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+
+    /* Pick one of the two options for RAM layout     */
+
+    /* OPTION A: Use all RAM banks as one big block   */
+    /* Reasonable, unless you are doing something     */
+    /* really particular with DMA or other concurrent */
+    /* access that would benefit from striping        */
+    RAM   : ORIGIN = 0x20000000, LENGTH = 264K
+
+    /* OPTION B: Keep the unstriped sections separate */
+    /* RAM: ORIGIN = 0x20000000, LENGTH = 256K        */
+    /* SCRATCH_A: ORIGIN = 0x20040000, LENGTH = 4K    */
+    /* SCRATCH_B: ORIGIN = 0x20041000, LENGTH = 4K    */
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..60fc45a
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,29 @@
+//! This example test the RP Pico on board LED.
+//!
+//! It does not work with the RP Pico W board. See wifi_blinky.rs.
+
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_rp::gpio;
+use embassy_time::Timer;
+use gpio::{Level, Output};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_rp::init(Default::default());
+    let mut led = Output::new(p.PIN_25, Level::Low);
+
+    loop {
+        info!("led on!");
+        led.set_high();
+        Timer::after_secs(1).await;
+
+        info!("led off!");
+        led.set_low();
+        Timer::after_secs(1).await;
+    }
+}