qmk_firmware/keyboards/handwired/macroboard/f401/info.json

{
    "matrix_pins": {
        "cols": ["A5", "A6", "A7", "B0", "B1", "B10"],
        "rows": ["A4", "A3", "A2", "A1", "A0"]
    },
    "diode_direction": "COL2ROW",
    "ws2812": {
        "driver": "pwm"
    },
    "processor": "STM32F401",
    "bootloader": "stm32-dfu",
    "board": "BLACKPILL_STM32_F401"
}