qmk_firmware/keyboards/preonic/rev3/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 = yes      # Enable Bootmagic Lite
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
NKRO_ENABLE = yes           # Enable N-Key Rollover
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
AUDIO_ENABLE = yes           # Audio output
RGBLIGHT_ENABLE = yes        # Enable WS2812 RGB underlight.
WS2812_DRIVER = pwm

# Do not enable RGB_MATRIX_ENABLE together with RGBLIGHT_ENABLE
RGB_MATRIX_ENABLE = no
RGB_MATRIX_DRIVER = WS2812

ENCODER_ENABLE = yes
DIP_SWITCH_ENABLE = yes

LAYOUTS = ortho_5x12