
DEVICE = atmega1284p
AVRDUDE = avrdude  
F_CPU   = 12000000

# Choose your favorite programmer and interface above.

CFLAGS = -O2 -ffreestanding -funroll-loops
#CFLAGS +=-fpack-struct -mcall-prologues -fno-tree-scev-cprop -ffunction-sections -fdata-sections -fwhole-program
#CFLAGS += -fpack-struct -fwhole-program -fpack-struct -ffunction-sections -fdata-sections -mcall-prologues -fno-tree-scev-cprop -ffreestanding -Wl,--relax,--gc-sections
CFLAGS += -fpack-struct -ffunction-sections -fdata-sections -Wl,--relax,--gc-sections


COMPILE = avr-gcc -Wall -I. $(CFLAGS)  -mmcu=$(DEVICE) -DF_CPU=$(F_CPU)


OBJECTS = nRF905/nRF905.cpp nRF905/nRF905_spi.cpp codecrypt/chacha.o main.o 

# symbolic targets:
all:	main.hex

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

install:	all
#	$(AVRDUDE) -b 9600 -c arduino -P /dev/ttyUSB0 -p $(DEVICE) -U flash:w:main.hex:i
	$(AVRDUDE) -c avrisp2 -P usb -p $(DEVICE) -U flash:w:main.hex:i


# Fuse low byte:
# 0xef = 1 1 1 0   1 1 1 1
#        ^ ^ \+/   \--+--/
#        | |  |       +------- CKSEL 3..0 (clock selection -> crystal @ 12 MHz)
#        | |  +--------------- SUT 1..0 (BOD enabled, fast rising power)
#        | +------------------ CKOUT (clock output on CKOUT pin -> disabled)
#        +-------------------- CKDIV8 (divide clock by 8 -> don't divide)
#
# Fuse high byte:
# 0xdb = 1 1 0 1   1 0 1 1
#        ^ ^ ^ ^   \-+-/ ^
#        | | | |     |   +---- RSTDISBL (disable external reset -> enabled)
#        | | | |     +-------- BODLEVEL 2..0 (brownout trigger level -> 2.7V)
#        | | | +-------------- WDTON (watchdog timer always on -> disable)
#        | | +---------------- SPIEN (enable serial programming -> enabled)
#        | +------------------ EESAVE (preserve EEPROM on Chip Erase -> not preserved)
#        +-------------------- DWEN (debug wire enable)

clean:
	rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.bin *.o nRF905/*.o main.s

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

main.hex:	main.bin
	rm -f main.hex main.eep.hex
	avr-objcopy -j .text -j .data -O ihex main.bin main.hex
	./checksize main.bin
# do the checksize script as our last action to allow successful compilation
# on Windows with WinAVR where the Unix commands will fail.

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

#cpp:
#	$(COMPILE) -E main.c
