# Makefile to assemble usart_echo.asm with avra assembler
# and erase Atmel flash and upload hex code to flash.
# (c) by Thomas Hoehn, October 2007

PROG=usart_echo
# tty for uisp programming
UISP_TTY=/dev/ttyS0
# tty for picocom
PICO_TTY=/dev/ttyUSB0
# verbose output for upload?
# (0 - none, 1 - normal, 2 - more,
# 3 - hash marks, 4 - detailed)
DEBUG=3

# uisp binary path
UISP=$(HOME)/uC/tools/uisp/uisp-20050207/src/uisp
HASH=8 # hash mark each 8 byte

ifdef DEBUG
VERBOSE=-v=$(DEBUG)
endif

all: assemble

help:
	@echo
	@echo "Usage: make [ clean | show_fuses | init_chip | erase | upload | verify | pico | test]"
	@echo "show_fuses - show all fuses bit settings"
	@echo "init_chip - init fuse bits to use ext. quarz"
	@echo "clean - remove all files created by make"
	@echo "erase - erase Atmel uC flash memory"
	@echo "upload - upload .hex file to Atmel flash"
	@echo "verify - verify .hex file and flash content"
	@echo "pico - run picocom on serial port to test USART"
	@echo "test - assemble, upload to flash and run picocom on serial port"
	@echo

%.hex: %.asm
	avra -l $*.lst -m $*.map $< | tee $*.log
	@# avra exits with rc=0 in case of an error
	@# so we have to create an error with make
	@grep -q "^Assembly complete with no errors" $*.log

assemble: $(PROG).hex

clean:
	rm -f *.hex *.cof *.obj *.lst *.map *.log

show_fuses:
	$(UISP) -dprog=dasa2 -dserial=$(UISP_TTY) --rd_fuses

# programm Fuse Low Byte:
# (see Atmel AT2313/V preliminary, p. 25 ff., p. 163 f.)
#
# CKOUT = 1 (unprogrammed)
# CKDIV8 = 1 (unprogrammed), i.e. no clock division
# SUT1:0 = 10, startup-time 16K CK, reset delay 14CK+4.1ms
# CKSEL3:0 = 1111, i.e. external crystal, 8Mhz - max.
init_chip:
	$(UISP) -dprog=dasa2 -dserial=$(UISP_TTY) --wr_fuse_l=0xef

erase:
	$(UISP) -dprog=dasa2 -dserial=$(UISP_TTY) --erase

upload: assemble erase
	$(UISP) $(VERBOSE) -dprog=dasa2 -dserial=$(UISP_TTY) \
	        --hash=$(HASH) --upload --verify if=$(PROG).hex

verify:
	$(UISP) $(VERBOSE) -dprog=dasa2 -dserial=$(UISP_TTY) \
                --hash=$(HASH) --verify if=$(PROG).hex

pre_upload_test:
ifeq	($(UISP_TTY),$(PICO_TTY))
	@echo "Make sure the $(UISP_TTY) is connected to the"
	@echo "ISP connector on the Pollin Evaluation Board."
	@read -p "Press enter key to continue..."
endif

pico:
ifeq	($(UISP_TTY),$(PICO_TTY))
	@echo "Make sure the $(PICO_TTY) is connected to the"
	@echo "RS232 port on the Pollin Evaluation Board."
	@read -p "Press enter key to continue..."
endif
	picocom $(PICO_TTY)

# Tidy up, assemble file, upload to uC
# and run picocom to test serial port
test: clean assemble pre_upload_test upload
ifeq	($(UISP_TTY),$(PICO_TTY))
	@echo "Make sure the $(PICO_TTY) is connected to the"
	@echo "RS232 port on the Pollin Evaluation Board."
	@read -p "Press enter key to continue..."
endif
	picocom $(PICO_TTY)