qmk_firmware/keyboards/matrix/m20add/rules.mk

# MCU name
MCU = STM32F411

# Linker script to use
# - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
#   or <this_dir>/ld/
MCU_LDSCRIPT = m20add_boot

# Board: it should exist either in <chibios>/os/hal/boards/
#  or <this_dir>/boards
BOARD = ST_NUCLEO64_F411RE

# Bootloader selection
BOOTLOADER = custom

# 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 = no         # Console for debug
COMMAND_ENABLE = no         # Commands for debug and configuration
NKRO_ENABLE = no            # Enable N-Key Rollover
NO_USB_STARTUP_CHECK = yes	# Disable initialization only when usb is plugged in

RGBLIGHT_ENABLE = yes

CUSTOM_MATRIX = lite
# project specific files
SRC += matrix.c tca6424.c rgb_ring.c drivers/led/issi/is31fl3731.c
I2C_DRIVER_REQUIRED = yes