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-rw-r--r--lib/lufa/Bootloaders/DFU/makefile14
-rw-r--r--tmk_core/avr.mk6
2 files changed, 12 insertions, 8 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.
diff --git a/tmk_core/avr.mk b/tmk_core/avr.mk
index 670e141bfd..5bfd5a9b0d 100644
--- a/tmk_core/avr.mk
+++ b/tmk_core/avr.mk
@@ -310,7 +310,11 @@ extcoff: $(BUILD_DIR)/$(TARGET).elf
bootloader:
make -C lib/lufa/Bootloaders/DFU/ clean
$(TMK_DIR)/make_dfu_header.sh $(ALL_CONFIGS)
- make -C lib/lufa/Bootloaders/DFU/
+ $(eval MAX_SIZE=$(shell n=`$(CC) -E -mmcu=$(MCU) $(CFLAGS) $(OPT_DEFS) tmk_core/common/avr/bootloader_size.c 2> /dev/null | sed -ne '/^#/n;/^AVR_SIZE:/,$${s/^AVR_SIZE: //;p;}'` && echo $$(($$n)) || echo 0))
+ $(eval PROGRAM_SIZE_KB=$(shell n=`expr $(MAX_SIZE) / 1024` && echo $$(($$n)) || echo 0))
+ $(eval BOOT_SECTION_SIZE_KB=$(shell n=`expr $(BOOTLOADER_SIZE) / 1024` && echo $$(($$n)) || echo 0))
+ $(eval FLASH_SIZE_KB=$(shell n=`expr $(PROGRAM_SIZE_KB) + $(BOOT_SECTION_SIZE_KB)` && echo $$(($$n)) || echo 0))
+ make -C lib/lufa/Bootloaders/DFU/ MCU=$(MCU) ARCH=$(ARCH) F_CPU=$(F_CPU) FLASH_SIZE_KB=$(FLASH_SIZE_KB) BOOT_SECTION_SIZE_KB=$(BOOT_SECTION_SIZE_KB)
printf "BootloaderDFU.hex copied to $(TARGET)_bootloader.hex\n"
cp lib/lufa/Bootloaders/DFU/BootloaderDFU.hex $(TARGET)_bootloader.hex