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-rw-r--r--lib/lufa/Bootloaders/DFU/makefile14
1 files changed, 7 insertions, 7 deletions
diff --git a/lib/lufa/Bootloaders/DFU/makefile b/lib/lufa/Bootloaders/DFU/makefile
index 0d2014015d..a10a576376 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.