qmk_firmware/keyboards/acheron/shark/rules.mk

# MCU name
MCU = STM32F303
BOARD = QMK_PROTON_C

# Bootloader selection
BOOTLOADER = stm32-dfu

# Build Options
#   change yes to no to disable
#
BOOTMAGIC_ENABLE = full     # Virtual DIP switch configuration
MOUSEKEY_ENABLE = yes       # Mouse keys
EXTRAKEY_ENABLE = yes       # Audio control and System control
CONSOLE_ENABLE = yes        # Console for debug
COMMAND_ENABLE = yes        # Commands for debug and configuration
# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
NKRO_ENABLE = no            # USB Nkey Rollover
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
MIDI_ENABLE = no            # MIDI support
UNICODE_ENABLE = no         # Unicode
BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
AUDIO_ENABLE = no           # Audio output on port C6

LAYOUTS = ortho_4x12

# Disable unsupported hardware
RGBLIGHT_SUPPORTED = no
AUDIO_SUPPORTED = no
BACKLIGHT_SUPPORTED = no