# Run "make help" for target help.
-MCU = atmega32u4
-ARCH = AVR8
-BOARD = QMK
-F_CPU = 16000000
-F_USB = $(F_CPU)
+MCU ?= atmega32u4
+ARCH ?= AVR8
+BOARD ?= QMK
+F_CPU ?= 16000000
+F_USB ?= $(F_CPU)
OPTIMIZATION = s
TARGET = BootloaderDFU
SRC = $(TARGET).c Descriptors.c BootloaderAPI.c BootloaderAPITable.S $(LUFA_SRC_USB)
# Flash size and bootloader section sizes of the target, in KB. These must
# match the target's total FLASH size and the bootloader size set in the
# device's fuses.
-FLASH_SIZE_KB = 32
-BOOT_SECTION_SIZE_KB = 4
+FLASH_SIZE_KB ?= 32
+BOOT_SECTION_SIZE_KB ?= 4
# Bootloader address calculation formulas
# Do not modify these macros, but rather modify the dependent values above.