X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lib%2Flufa%2FBootloaders%2FDFU%2Fmakefile;h=a10a57637668e584cc44463f148654ad51cd1e45;hb=f859375284f5a27f5b4f8cbe654e305ca3face17;hp=0d2014015dc973c812fc86fe4d37699411f17a12;hpb=ee43856ff7ba37ea89d1a8a4700efba4e4f69571;p=qmk_firmware.git

diff --git a/lib/lufa/Bootloaders/DFU/makefile b/lib/lufa/Bootloaders/DFU/makefile
index 0d2014015..a10a57637 100644
--- a/lib/lufa/Bootloaders/DFU/makefile
+++ b/lib/lufa/Bootloaders/DFU/makefile
@@ -11,11 +11,11 @@
 
 # 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 $(LUFA_SRC_USB)
@@ -26,8 +26,8 @@ LD_FLAGS     = -Wl,--section-start=.text=$(BOOT_START_OFFSET) $(BOOT_API_LD_FLAG
 # 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.