PROJ=blink

# Add Windows and Unix support
RM         = rm -rf
COPY       = cp -a
PATH_SEP   = /
ifeq ($(OS),Windows_NT)
# When SHELL=sh.exe and this actually exists, make will silently
# switch to using that instead of cmd.exe.  Unfortunately, there's
# no way to tell which environment we're running under without either
# (1) printing out an error message, or (2) finding something that
# works everywhere.
# As a result, we force the shell to be cmd.exe, so it works both
# under cygwin and normal Windows.
SHELL      = cmd.exe
COPY       = copy
RM         = del
PATH_SEP   = \\
endif


all: ${PROJ}.dfu

dfu: ${PROJ}.dfu
	dfu-util --alt 0 --download $< --reset

%.json: %.v
	yosys -p "read_verilog $<; synth_ecp5 -json $@"

%_out.config: %.json
	nextpnr-ecp5 --json $< --textcfg $@ --um5g-85k --speed 8 --package CABGA381 --lpf ButterStick_r1.0.pcf

%.bit: %_out.config
	ecppack --compress --freq 38.8 --input $< --bit $@

%.dfu : %.bit
	$(COPY) $< $@
	dfu-suffix -v 1209 -p 5af1 -a $@

clean:
	$(RM) -f ${PROJ}.bit ${PROJ}_out.config ${PROJ}.json ${PROJ}.dfu

.PHONY: prog clean