# Name: Makefile
# Project: bootloadHID
# Author: Christian Starkjohann
# Creation Date: 2007-03-19
# Tabsize: 8
# Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
# License: GNU GPL v2 (see License.txt)

###############################################################################
# Configure the following variables according to your AVR. The example below
# is for an ATMega8. Program the device with
#     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
BOOTLOADER_ADDRESS = 1800
F_CPU = 12800000
FUSEH = 0x90
FUSEL = 0x84
# Fuse high byte:
# 0x80 = 1 0 0 1   0 0 0 0 <-- BOOTRST (boot reset vector at 0x1800)
#        ^ ^ ^ ^   ^ ^ ^------ BOOTSZ0
#        | | | |   | +-------- BOOTSZ1
#        | | | |   + --------- EESAVE (preserve EEPROM over chip erase)
#        | | | +-------------- CKOPT (not used)
#        | | +---------------- SPIEN (allow serial programming)
#        | +------------------ WDTON (WDT always on)
#        +-------------------- RSTDISBL (reset pin is enabled)
# Fuse low byte:
# 0x84 = 1 0 0 0   0 1 0 0
#        ^ ^ \ /   \--+--/
#        | |  |       +------- CKSEL 3..0 (internal RC oscillator at 8 MHz)
#        | |  +--------------- SUT 1..0 (minimum start-up time = 0.5 s)
#        | +------------------ BODEN (BrownOut Detector enabled)
#        +-------------------- BODLEVEL (2.7V)

###############################################################################

AVRDUDE = avrdude -c pony-stk200 -P lpt1 -p $(DEVICE) -E noreset

LDFLAGS += -Wl,--section-start=.text=$(BOOTLOADER_ADDRESS)
LDFLAGS += -T ./ldscripts/avr4.x

COMPILE = avr-gcc -Wall -Os -Iusbdrv -I. -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) -DDEBUG_LEVEL=0
# NEVER compile the final product with debugging! Any debug output will
# distort timing so that the specs can't be met.

OBJECTS = interrupts.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o


# symbolic targets:
all:	main.hex

.c.o:
	$(COMPILE) -c $< -o $@

.S.o:
	$(COMPILE) -x assembler-with-cpp -c $< -o $@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.

.c.s:
	$(COMPILE) -S $< -o $@

flash:	all
	$(AVRDUDE) -U flash:w:main.hex:i

readflash:
	$(AVRDUDE) -U flash:r:read.hex:i

fuse:
	$(AVRDUDE) -U hfuse:w:$(FUSEH):m -U lfuse:w:$(FUSEL):m

lock:
	$(AVRDUDE) -U lock:w:0x2F:m
	
# all three programming options in one invocation of avrdude
prog:
	$(AVRDUDE) -U hfuse:w:$(FUSEH):m -U lfuse:w:$(FUSEL):m -U flash:w:main.hex:i -U lock:w:0x2F:m

read_fuses:
	$(UISP) --rd_fuses

clean:
	rm -f main.hex main.bin *.o usbdrv/*.o main.s usbdrv/oddebug.s usbdrv/usbdrv.s

# file targets:
main.bin:	$(OBJECTS)
	$(COMPILE) -o main.bin $(OBJECTS) $(LDFLAGS)

main.hex:	main.bin
	rm -f main.hex main.eep.hex
	avr-objcopy -j .text -j .data -O ihex main.bin main.hex
	avr-size main.bin

disasm:	main.bin
	avr-objdump -d main.bin

cpp:
	$(COMPILE) -E main.c
