qmk_firmware/keyboards/handwired/ck4x4/keyboard.json

{
    "keyboard_name": "CK4x4",
    "manufacturer": "QMK",
    "url": "",
    "maintainer": "awkannan",
    "usb": {
        "vid": "0xFEED",
        "pid": "0x6464",
        "device_version": "0.0.1"
    },
    "features": {
        "bootmagic": false,
        "command": true,
        "console": true,
        "extrakey": true,
        "mousekey": true,
        "nkro": true
    },
    "qmk": {
        "locking": {
            "enabled": true,
            "resync": true
        }
    },
    "matrix_pins": {
        "cols": ["B7", "B8", "B9", "B10"],
        "rows": ["B3", "B4", "B5", "B6"]
    },
    "diode_direction": "COL2ROW",
    "processor": "STM32F072",
    "bootloader": "stm32-dfu",
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"matrix": [0, 0], "x": 0, "y": 0},
                {"matrix": [0, 1], "x": 1, "y": 0},
                {"matrix": [0, 2], "x": 2, "y": 0},
                {"matrix": [0, 3], "x": 3, "y": 0},

                {"matrix": [1, 0], "x": 0, "y": 1},
                {"matrix": [1, 1], "x": 1, "y": 1},
                {"matrix": [1, 2], "x": 2, "y": 1},
                {"matrix": [1, 3], "x": 3, "y": 1},

                {"matrix": [2, 0], "x": 0, "y": 2},
                {"matrix": [2, 1], "x": 1, "y": 2},
                {"matrix": [2, 2], "x": 2, "y": 2},
                {"matrix": [2, 3], "x": 3, "y": 2},

                {"matrix": [3, 0], "x": 0, "y": 3},
                {"matrix": [3, 1], "x": 1, "y": 3},
                {"matrix": [3, 2], "x": 2, "y": 3},
                {"matrix": [3, 3], "x": 3, "y": 3}
            ]
        }
    }
}