From d483267d6bd698cbb36a5346e292655c1f85b260 Mon Sep 17 00:00:00 2001
From: uttarayan21 <email@uttarayan.me>
Date: Sun, 12 Oct 2025 21:43:50 +0530
Subject: [PATCH] feat: initial commit for corne

---
 .cargo/config.toml  |   10 +
 .envrc              |    1 +
 .gitignore          |    9 +
 Cargo.lock          | 2611 +++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml          |   97 ++
 Makefile.toml       |   83 ++
 README.md           |   32 +
 build.rs            |   87 ++
 flake.lock          |  120 ++
 flake.nix           |   69 ++
 keyboard.toml       |   65 ++
 memory.x            |   11 +
 rust-toolchain.toml |    6 +
 src/central.rs      |    7 +
 src/peripheral.rs   |    7 +
 vial.json           |   74 ++
 16 files changed, 3289 insertions(+)
 create mode 100644 .cargo/config.toml
 create mode 100644 .envrc
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 Makefile.toml
 create mode 100644 README.md
 create mode 100644 build.rs
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 keyboard.toml
 create mode 100644 memory.x
 create mode 100644 rust-toolchain.toml
 create mode 100644 src/central.rs
 create mode 100644 src/peripheral.rs
 create mode 100644 vial.json

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..5fe0add
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,10 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+runner = "probe-rs run --chip nRF52840_xxAA"
+linker = "flip-link"
+
+[build]
+target = "thumbv7em-none-eabihf"
+
+[env]
+DEFMT_LOG = "info"
+KEYBOARD_TOML_PATH =  { value = "keyboard.toml", relative = true }
diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a3def68
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+target
+
+*.bin
+*.elf
+*.hex
+*.uf2
+
+.DS_Store
+.direnv
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..bd435e8
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,2611 @@
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+ "defmt 0.3.100",
+ "heapless 0.8.0",
+ "portable-atomic",
+]
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+[[package]]
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+ "defmt 0.3.100",
+ "serde",
+ "ssmarshal",
+ "usb-device",
+ "usbd-hid-macros",
+]
+
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+ "bitfield 0.14.0",
+]
+
+[[package]]
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+ "byteorder",
+ "hashbrown 0.13.2",
+ "log",
+ "proc-macro2",
+ "quote",
+ "serde",
+ "syn 1.0.109",
+ "usbd-hid-descriptors",
+]
+
+[[package]]
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+ "js-sys",
+ "wasm-bindgen",
+]
+
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+
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+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
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+ "proc-macro2",
+ "quote",
+ "syn 2.0.106",
+ "wasm-bindgen-shared",
+]
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+[[package]]
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+ "proc-macro2",
+ "quote",
+ "syn 2.0.106",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
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+ "windows-implement",
+ "windows-interface",
+ "windows-link",
+ "windows-result",
+ "windows-strings",
+]
+
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+ "memchr",
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+ "memchr",
+]
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+checksum = "388c44dc09d76f1536602ead6d325eb532f5c122f17782bd57fb47baeeb767e2"
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+ "lzma-sys",
+]
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+[[package]]
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+ "arraydeque",
+ "encoding_rs",
+ "hashlink",
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+ "zerocopy-derive",
+]
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+[[package]]
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.106",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..9a54752
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,97 @@
+[package]
+name = "corne-rs"
+version = "0.1.0"
+authors = ["Haobo Gu <haobogu@outlook.com>"]
+description = "Keyboard firmware written in Rust"
+homepage = "https://github.com/haobogu/rmk"
+repository = "https://github.com/haobogu/rmk"
+readme = "README.md"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+
+[dependencies]
+rmk = { version = "0.7", features = [
+    "nrf52840_ble",
+    "split",
+    "async_matrix",
+    "adafruit_bl",
+] }
+nrf-sdc = { version = "0.1.0", default-features = false, features = [
+    "defmt",
+    "peripheral",
+    "central",
+    "nrf52840",
+] }
+nrf-mpsl = { version = "0.1.0", default-features = false, features = [
+    "defmt",
+    "critical-section-impl",
+    "nrf52840",
+] }
+bt-hci = { version = "0.3", default-features = false, features = ["defmt"] }
+
+cortex-m = "0.7.7"
+cortex-m-rt = "0.7.5"
+embassy-time = { version = "0.4", features = ["tick-hz-32_768", "defmt", "defmt-timestamp-uptime"] }
+embassy-nrf = { version = "0.3.1", features = [
+    "defmt",
+    "nrf52840",
+    "time-driver-rtc1",
+    "gpiote",
+    "unstable-pac",
+    "nfc-pins-as-gpio",
+    "time",
+] }
+embassy-executor = { version = "0.7", features = [
+    "defmt",
+    "arch-cortex-m",
+    "executor-thread",
+] }
+defmt = "1.0"
+defmt-rtt = "1.0"
+panic-probe = { version = "1.0", features = ["print-defmt"] }
+static_cell = "2"
+
+rand = { version = "0.8.4", default-features = false }
+rand_core = { version = "0.6" }
+rand_chacha = { version = "0.3", default-features = false }
+
+[patch.crates-io]
+embassy-sync = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-futures = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-executor = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-nrf = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-time = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-usb = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+embassy-embedded-hal = { git = "https://github.com/embassy-rs/embassy.git", rev = "f35aa4005a63e8d478b2b95aaa2bfb316b72dece" }
+nrf-sdc = { git = "https://github.com/alexmoon/nrf-sdc.git", rev = "7be9b853e15ca0404d65c623d1ec5795fd96c204" }
+nrf-mpsl = { git = "https://github.com/alexmoon/nrf-sdc.git", rev = "7be9b853e15ca0404d65c623d1ec5795fd96c204" }
+trouble-host = { git = "https://github.com/embassy-rs/trouble", rev = "90c6359" }
+
+[build-dependencies]
+xz2 = "0.1.7"
+json = "0.12"
+const-gen = "1.6"
+
+# Split keyboard example
+[[bin]]
+name = "central"
+path = "src/central.rs"
+
+[[bin]]
+name = "peripheral"
+path = "src/peripheral.rs"
+
+[profile.dev]
+codegen-units = 1      # better optimizations
+debug = true
+opt-level = 1
+overflow-checks = true
+lto = false
+panic = 'unwind'
+
+[profile.release]
+codegen-units = 1       # better optimizations
+debug = true            # no overhead for bare-metal
+opt-level = "z"         # optimize for binary size
+overflow-checks = false
+lto = "fat"
diff --git a/Makefile.toml b/Makefile.toml
new file mode 100644
index 0000000..09b3149
--- /dev/null
+++ b/Makefile.toml
@@ -0,0 +1,83 @@
+[tasks.install-llvm-tools]
+install_crate = { rustup_component_name = "llvm-tools" }
+
+[tasks.flip-link]
+install_crate = { crate_name = "flip-link", binary = "flip-link", test_arg = ["-h"] }
+
+[tasks.build]
+command = "cargo"
+args = ["build", "--release"]
+dependencies = ["install-llvm-tools", "flip-link"]
+
+[tasks.objcopy-central]
+install_crate = { crate_name = "cargo-binutils", binary = "cargo", test_arg = [
+    "objcopy",
+    "--help",
+] }
+command = "cargo"
+args = [
+    "objcopy",
+    "--release",
+    "--bin",
+    "central",
+    "--",
+    "-O",
+    "ihex",
+    "corne-rs-central.hex",
+]
+dependencies = ["build"]
+
+[tasks.objcopy-peripheral]
+install_crate = { crate_name = "cargo-binutils", binary = "cargo", test_arg = [
+    "objcopy",
+    "--help",
+] }
+command = "cargo"
+args = [
+    "objcopy",
+    "--release",
+    "--bin",
+    "peripheral",
+    "--",
+    "-O",
+    "ihex",
+    "corne-rs-peripheral.hex",
+]
+dependencies = ["build"]
+
+[tasks.uf2-central]
+install_crate = { crate_name = "cargo-hex-to-uf2", binary = "cargo", test_arg = [
+    "hex-to-uf2",
+    "--help",
+] }
+command = "cargo"
+args = [
+    "hex-to-uf2",
+    "--input-path",
+    "corne-rs-central.hex",
+    "--output-path",
+    "corne-rs-central.uf2",
+    "--family",
+    "nrf52840",
+]
+dependencies = ["objcopy-central"]
+
+[tasks.uf2-peripheral]
+install_crate = { crate_name = "cargo-hex-to-uf2", binary = "cargo", test_arg = [
+    "hex-to-uf2",
+    "--help",
+] }
+command = "cargo"
+args = [
+    "hex-to-uf2",
+    "--input-path",
+    "corne-rs-peripheral.hex",
+    "--output-path",
+    "corne-rs-peripheral.uf2",
+    "--family",
+    "nrf52840",
+]
+dependencies = ["objcopy-peripheral"]
+
+[tasks.uf2]
+dependencies = ["uf2-central", "uf2-peripheral"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..348d4e8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,32 @@
+# RMK 
+
+RMK is a feature-rich and easy-to-use keyboard firmware.
+
+## uf2 support
+
+If you’re using the Adafruit_nRF52_Bootloader (pre-installed on the nice!nano), you’re in luck! This bootloader supports the .uf2 firmware format, which eliminates the need for a debugging probe to flash your firmware. RMK uses the `cargo-make` tool to generate .uf2 firmware, with the generation process defined in the `Makefile.toml`.
+
+Follow these steps to generate and flash the .uf2 firmware with RMK:
+
+1. Get `cargo-make` tool:
+   ```shell
+   cargo install --force cargo-make
+   ```
+2. Compile RMK and generates .uf2 firmware:
+   ```shell
+   cargo make uf2 --release
+   ```
+3. Flash
+
+   - Put your board into bootloader mode. A USB drive will appear on your computer.
+   - Drag and drop the generated .uf2 firmware file onto the USB drive. The RMK firmware will be automatically flashed onto your microcontroller.
+
+   For additional details on entering bootloader mode and flashing firmware, refer to the [nice!nano documentation](https://nicekeyboards.com/docs/nice-nano/getting-started#flashing-firmware-and-bootloaders)
+
+### Tips for nRF52840
+
+Most nice!nano compatible boards have bootloader with SoftDevice pre-flashed. Since v0.7.x, RMK will remove old SoftDevice Bluetooth stack and replace it with its own. So if you want to rollback to v0.6.x, or switch to firmwares that use SoftDevice stack(for example, zmk), you will need to [re-flash the bootloader](https://nicekeyboards.com/docs/nice-nano/troubleshooting#my-nicenano-seems-to-be-acting-up-and-i-want-to-re-flash-the-bootloader).
+
+### Additional notes
+
+RMK defaults to USB-priority mode if a USB cable is connected. After flashing, remember to disconnect the USB cable, or [switch to BLE-priority mode](https://rmk.rs/docs/features/wireless.html#multiple-profile-support) by pressing User11(Switch Output) key.
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..9610ae0
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,87 @@
+//! 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.
+//!
+//! The build script also sets the linker flags to tell it which link script to use.
+
+use const_gen::*;
+use std::fs::File;
+use std::io::{Read, Write};
+use std::path::{Path, PathBuf};
+use std::{env, fs};
+use xz2::read::XzEncoder;
+
+fn main() {
+    // Generate vial config at the root of project
+    println!("cargo:rerun-if-changed=vial.json");
+    println!("cargo:rerun-if-changed=keyboard.toml");
+
+    generate_vial_config();
+
+    // 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");
+
+    // Specify linker arguments.
+
+    // `--nmagic` is required if memory section addresses are not aligned to 0x10000,
+    // for example the FLASH and RAM sections in your `memory.x`.
+    // See https://github.com/rust-embedded/cortex-m-quickstart/pull/95
+    println!("cargo:rustc-link-arg=--nmagic");
+
+    // Set the linker script to the one provided by cortex-m-rt.
+    println!("cargo:rustc-link-arg=-Tlink.x");
+
+    // Set the extra linker script from defmt
+    println!("cargo:rustc-link-arg=-Tdefmt.x");
+
+    // Use flip-link overflow check: https://github.com/knurling-rs/flip-link
+    println!("cargo:rustc-linker=flip-link");
+}
+
+fn generate_vial_config() {
+    // Generated vial config file
+    let out_file = Path::new(&env::var_os("OUT_DIR").unwrap()).join("config_generated.rs");
+
+    let p = Path::new("vial.json");
+    let mut content = String::new();
+    match File::open(p) {
+        Ok(mut file) => {
+            file.read_to_string(&mut content)
+                .expect("Cannot read vial.json");
+        }
+        Err(e) => println!("Cannot find vial.json {:?}: {}", p, e),
+    };
+
+    let vial_cfg = json::stringify(json::parse(&content).unwrap());
+    let mut keyboard_def_compressed: Vec<u8> = Vec::new();
+    XzEncoder::new(vial_cfg.as_bytes(), 6)
+        .read_to_end(&mut keyboard_def_compressed)
+        .unwrap();
+
+    let keyboard_id: Vec<u8> = vec![0xB9, 0xBC, 0x09, 0xB2, 0x9D, 0x37, 0x4C, 0xEA];
+    let const_declarations = [
+        const_declaration!(pub VIAL_KEYBOARD_DEF = keyboard_def_compressed),
+        const_declaration!(pub VIAL_KEYBOARD_ID = keyboard_id),
+    ]
+    .map(|s| "#[allow(clippy::redundant_static_lifetimes)]\n".to_owned() + s.as_str())
+    .join("\n");
+    fs::write(out_file, const_declarations).unwrap();
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..3186030
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,120 @@
+{
+  "nodes": {
+    "crates-io-index": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1760269763,
+        "narHash": "sha256-tQKMd4cnyRnPBcQrOTIwvgN3zP+08UToiO3e0h8ve1E=",
+        "owner": "rust-lang",
+        "repo": "crates.io-index",
+        "rev": "17599ab4988926ab8789bbf7d8634514c6bb65a0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "repo": "crates.io-index",
+        "type": "github"
+      }
+    },
+    "crates-nix": {
+      "inputs": {
+        "crates-io-index": [
+          "crates-io-index"
+        ]
+      },
+      "locked": {
+        "lastModified": 1759305425,
+        "narHash": "sha256-Za25XBr6UjZyguuXbctheUNT/6wPhbLs8YSXNTqyXaw=",
+        "owner": "uttarayan21",
+        "repo": "crates.nix",
+        "rev": "8879158206af5508a2c740d732bca92ae799c2b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "uttarayan21",
+        "repo": "crates.nix",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1760038930,
+        "narHash": "sha256-Oncbh0UmHjSlxO7ErQDM3KM0A5/Znfofj2BSzlHLeVw=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "0b4defa2584313f3b781240b29d61f6f9f7e0df3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crates-io-index": "crates-io-index",
+        "crates-nix": "crates-nix",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1760236527,
+        "narHash": "sha256-h9+WEQtUIZaZMvA1pnbZbMM+5X39OFnW92Q8hNoToD0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "a38dd7f462825c75ce8567816ae38c2e7d826bfa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..bb4ddf0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,69 @@
+{
+  description = "A very basic clang devshell flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    crates-nix = {
+      url = "github:uttarayan21/crates.nix";
+      inputs.crates-io-index.follows = "crates-io-index";
+    };
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    crates-io-index = {
+      url = "github:rust-lang/crates.io-index";
+      flake = false;
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    crates-nix,
+    rust-overlay,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      overlays = [
+        # (final: prev: {
+        # })
+        rust-overlay.overlays.default
+      ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+      };
+      crates = crates-nix.mkLib {inherit pkgs;};
+      stableToolchain = pkgs.rust-bin.stable.latest.default.override {
+        targets = ["thumbv7em-none-eabihf"];
+        extensions = ["rust-src" "llvm-tools"];
+      };
+      stableToolchainWithLLvmTools = pkgs.rust-bin.stable.latest.default.override {
+        targets = ["thumbv7em-none-eabihf"];
+        extensions = ["rust-src" "llvm-tools"];
+      };
+      stableToolchainWithRustAnalyzer = pkgs.rust-bin.stable.latest.default.override {
+        targets = ["thumbv7em-none-eabihf"];
+        extensions = ["rust-src" "llvm-tools" "rust-analyzer"];
+      };
+    in {
+      # packages = {
+      # };
+      devShells.default = pkgs.mkShell {
+        nativeBuildInputs = with pkgs; [clang pkg-config];
+        buildInputs = with pkgs; [libiconv];
+        # PKG_CONFIG_PATH = pkgs.lib.makeSearchPath "lib/pkgconfig" (with pkgs; [ncnn]);
+        LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
+        packages = with pkgs; [
+          (crates.buildCrate "rmkit" {})
+          (crates.buildCrate "cargo-hex-to-uf2" {})
+          flip-link
+          cargo-make
+          cargo-binutils
+          stableToolchainWithRustAnalyzer
+        ];
+      };
+    });
+}
diff --git a/keyboard.toml b/keyboard.toml
new file mode 100644
index 0000000..eadc0d5
--- /dev/null
+++ b/keyboard.toml
@@ -0,0 +1,65 @@
+[keyboard]
+name = "corne-rs"
+product_name = "corne-rs"
+vendor_id = 0x4c4b
+product_id = 0x4643
+manufacturer = "RMK"
+chip = "nrf52840"
+
+[layout]
+# WARNING: Currently row2col/col2row is set in RMK's feature gate, row2col config here is valid ONLY when you're using cloud compilation.
+# Checkout doc here: https://rmk.rs/docs/user_guide/faq.html#my-matrix-is-row2col-the-matrix-doesn-t-work
+# row2col = true
+rows = 4
+cols = 12
+layers = 3
+keymap = [
+    [
+        ["Tab", "Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "Backspace"],
+        ["LCtrl", "A", "S", "D", "F", "G", "H", "J", "K", "L", "Semicolon", "Quote"],
+        ["LShift", "Z", "X", "C", "V", "B", "N", "M", "Comma", "Dot", "Slash", "Enter"],
+        ["__", "__", "__", "OSM(LGui)", "LAlt", "Space", "Enter", "MO(2)", "MO(1)", "__", "__", "__"]
+    ],
+    [
+        ["Tab", "Kc1", "Kc2", "Kc3", "Kc4", "Kc5", "Kc6", "Kc7", "Kc8", "Kc9", "Kc0", "Delete"],
+        ["_", "AudioVolDown", "AudioVolUp", "AudioMute", "BrightnessDown", "BrightnessUp", "Left", "Down", "UP", "Right", "Semicolon", "Quote"],
+        ["_", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "F12", "_"],
+        ["__", "__", "__", "_", "_", "_", "_", "_", "_", "__", "__", "__"]
+    ],
+    [
+        ["_", "WM(Kc1, LShift)", "WM(Kc2, LShift)", "WM(Kc3, LShift)", "WM(Kc4, LShift)", "WM(Kc5, LShift)", "WM(Kc6, LShift)", "WM(Kc7, LShift)", "WM(Kc8, LShift)", "WM(Kc9, LShift)", "WM(Kc0, LShift)", "Backspace"],
+        ["_", "User0", "User1", "User2", "User4", "User5", "Minus", "Equal", "LeftBracket", "RightBracket", "Backslash", "Grave"],
+        ["_", "User10", "_", "_", "_", "_", "_", "_", "_", "_", "_", "_"],
+        ["__", "__", "__", "_", "_", "_", "_", "_", "LAlt", "__", "__", "__"]
+    ],
+]
+
+[ble]
+enabled = true
+
+[behavior]
+tap_hold = { enable_hrm = true }
+
+[split]
+connection = "ble"
+
+
+[split.central]
+rows = 4
+cols = 6
+row_offset = 0
+col_offset = 0
+ble_addr = [0x18, 0xe2, 0x21, 0x80, 0xc0, 0xc7]
+[split.central.matrix]
+input_pins = ["P0_22", "P0_24", "P1_00", "P0_11"]
+output_pins = ["P0_31", "P0_29", "P0_02", "P1_15", "P1_13", "P1_11"]
+
+[[split.peripheral]]
+rows = 4
+cols = 6
+row_offset = 0
+col_offset = 6
+ble_addr = [0x7e, 0xfe, 0x73, 0x9e, 0x66, 0xe3]
+[split.peripheral.matrix]
+input_pins = ["P0_22", "P0_24", "P1_00", "P0_11"]
+output_pins = ["P1_11", "P1_13", "P1_15", "P0_02", "P0_29", "P0_31"]
diff --git a/memory.x b/memory.x
new file mode 100644
index 0000000..3f9d5d2
--- /dev/null
+++ b/memory.x
@@ -0,0 +1,11 @@
+MEMORY
+{
+  /* NOTE 1 K = 1 KiB = 1024 bytes */
+  /* These values correspond to the nRF52840 WITH Adafruit nRF52 bootloader */
+  FLASH : ORIGIN = 0x00001000, LENGTH = 1020K
+  RAM : ORIGIN = 0x20000008, LENGTH = 255K
+
+  /* These values correspond to the nRF52840 */
+  /* FLASH : ORIGIN = 0x00000000, LENGTH = 1024K */
+  /* RAM : ORIGIN = 0x20000000, LENGTH = 256K */
+}
\ No newline at end of file
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..824cb88
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,6 @@
+[toolchain]
+channel = "stable"
+components = ["rust-src", "rustfmt", "llvm-tools"]
+targets = [
+    "thumbv7em-none-eabihf",
+]
diff --git a/src/central.rs b/src/central.rs
new file mode 100644
index 0000000..db41ba4
--- /dev/null
+++ b/src/central.rs
@@ -0,0 +1,7 @@
+#![no_main]
+#![no_std]
+
+use rmk::macros::rmk_central;
+
+#[rmk_central]
+mod keyboard_central {}
diff --git a/src/peripheral.rs b/src/peripheral.rs
new file mode 100644
index 0000000..36c4a32
--- /dev/null
+++ b/src/peripheral.rs
@@ -0,0 +1,7 @@
+#![no_main]
+#![no_std]
+
+use rmk::macros::rmk_peripheral;
+
+#[rmk_peripheral(id = 0)]
+mod keyboard_peripheral {}
diff --git a/vial.json b/vial.json
new file mode 100644
index 0000000..9486b32
--- /dev/null
+++ b/vial.json
@@ -0,0 +1,74 @@
+{
+    "name": "corne-rs",
+    "vendorId": "0x4C4B",
+    "productId": "0x4643",
+    "lighting": "none",
+    "matrix": {
+        "rows": 4,
+        "cols": 3
+    },
+    "customKeycodes": [
+        {
+            "name": "BT0",
+            "title": "Bluetooth Channel 0",
+            "shortName": "BT0"
+        },
+        {
+            "name": "BT1",
+            "title": "Bluetooth Channel 1",
+            "shortName": "BT1"
+        },
+        {
+            "name": "BT2",
+            "title": "Bluetooth Channel 2",
+            "shortName": "BT2"
+        },
+        {
+            "name": "NEXT_BT",
+            "title": "Switch to the next Bluetooth channel",
+            "shortName": "Next\nBT"
+        },
+        {
+            "name": "PREV_BT",
+            "title": "Switch to the previous Bluetooth channel",
+            "shortName": "Prev\nBT"
+        },
+        {
+            "name": "CLR_BT",
+            "title": "Clear bond info for current channel",
+            "shortName": "Clear\nBT"
+        },
+        {
+            "name": "SWITCH",
+            "title": "Switch default output mode between USB/BLE",
+            "shortName": "Switch\nOutput"
+        }
+    ],
+    "layouts": {
+        "keymap": [
+            [
+                "0,0",
+                "0,1",
+                "0,2"
+            ],
+            [
+                "1,0",
+                "1,1",
+                "1,2"
+            ],
+            [
+                "2,0",
+                "2,1",
+                "2,2"
+            ],
+            [
+                {
+                    "y": -2,
+                    "x": 4
+                },
+                "3,0",
+                "3,2"
+            ]
+        ]
+    }
+}
\ No newline at end of file