# Project: bootloadHID
# Tabsize: 8, LineEnds: LF, CodePage: UTF-8
# Program the device with
# make program # program all
# make fuse # to set the clock generator, boot section size etc.
# make flash # to load the boot loader into flash
# make lock # to protect the boot loader from overwriting
DEVICE = atmega8
F_CPU = 12800000
# Fuse high byte:
HFUSE = 0x90
# 1 0 0 1 0 0 0 0 ←─ BOOTRST (Boot reset vector at byte address 0x1800)
# ↑ ↑ ↑ ↑ ↑ └─┴───── BOOTSZ (Boot-area size: 2 KByte (0x800), maximum)
# │ │ │ │ └───────── EESAVE (Preserve EEPROM over chip erase: YES)
# │ │ │ └──────────── CKOPT (Clock option: not used)
# │ │ └────────────── SPIEN (Serial Programming enable: YES)
# │ └──────────────── WDTON (Watchdog Timer always on: YES)
# └────────────────── RSTDISBL (External Reset disable: NO)
# Fuse low byte:
LFUSE = 0x84
# 1 0 0 0 0 1 0 0
# ↑ ↑ └┬┘ └──┬──┘
# │ │ │ └────── CKSEL (Oscillator selection: RC oscillator 8 MHz)
# │ │ └───────────── SUT (Start-up time: 0.5 µs, minimum)
# │ └──────────────── BODEN (Brown-out detector enable: YES)
# └────────────────── BODLEVEL (Brown-out detection level: 2.7 V)
PROJECT = BL
USBDRV = ../../usbdrv
AVRDUDE = avrdude -c pony-stk200 -P lpt1 -p $(DEVICE) -E noreset
CFLAGS += -Wall -Os -I$(USBDRV) -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU)
LDFLAGS += -nostartfiles -Ttext 0x1800
OBJECTS = $(PROJECT).o usbdrvasm.o
# symbolic targets:
all: $(PROJECT).hex $(PROJECT).lst
flash: all
$(AVRDUDE) -U flash:w:$(PROJECT).hex:i -U lock:w:0x2F:m
readflash:
$(AVRDUDE) -U flash:r:read.hex:i
fuse:
$(AVRDUDE) -U hfuse:w:$(HFUSE):m -U lfuse:w:$(LFUSE):m
lock:
$(AVRDUDE) -U lock:w:0x2F:m
# all three programming options in one invocation of avrdude
program:
$(AVRDUDE) -U hfuse:w:$(HFUSE):m -U lfuse:w:$(LFUSE):m -U flash:w:$(PROJECT).hex:i -U lock:w:0x2F:m
clean:
rm -f $(PROJECT).lst $(PROJECT).elf $(OBJECTS)
$(PROJECT).o: $(PROJECT).c makefile bootloaderconfig.h usbconfig.h
# Ignore warnings saying “`noreturn' function does return”
avr-gcc -c $< -o $@ $(CFLAGS) -Wno-unused-function
usbdrvasm.o: $(USBDRV)/usbdrvasm.S makefile usbconfig.h
avr-gcc -c $< -o $@ $(CFLAGS)
$(PROJECT).elf: $(OBJECTS)
avr-gcc -o $@ $(OBJECTS) $(LDFLAGS)
$(PROJECT).hex: $(PROJECT).elf
rm -f $@
# Do not copy .data section here. There is no initializion routine that uses it.
avr-objcopy -j .text -O ihex $< $@
avr-size $<
# With avr-gcc 3.4.6 (2006), the code size is tuned to 2048 bytes.
# avr-gcc 4.1.2 bloats the code to much more than 2048 bytes!
$(PROJECT).lst: $(PROJECT).elf
avr-objdump -d $< > $@
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