qmk_firmware/keyboards/cannonkeys/rekt1800/rules.mk

# MCU name
MCU = STM32F072

# Build Options
#   comment out to disable the options.
#
BOOTMAGIC_ENABLE = lite     # 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
SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
NKRO_ENABLE = yes           # USB Nkey Rollover
CUSTOM_MATRIX = no          # Custom matrix file
BACKLIGHT_ENABLE = yes
RGBLIGHT_ENABLE = no

# Wildcard to allow APM32 MCU 
DFU_SUFFIX_ARGS = -p FFFF -v FFFF

# Enter lower-power sleep mode when on the ChibiOS idle thread
OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE