add basic example

hdl/Makefile

@@ -0,0 +1,38 @@
+PROJ = top
+PIN_DEF = pins.pcf
+DEVICE = hx8k
+PACKAGE = ct256
+
+all: $(PROJ).rpt $(PROJ).bin
+
+%.blif: %.v
+	yosys -p 'synth_ice40 -top top -blif $@' $(wildcard *.v)
+	# yosys -p 'synth_ice40 -top top -blif $@' $<
+
+%.asc: $(PIN_DEF) %.blif
+	arachne-pnr -d $(subst hx,,$(subst lp,,$(DEVICE))) -P $(PACKAGE) -o $@ -p $^
+
+%.bin: %.asc
+	icepack $< $@
+
+%.rpt: %.asc
+	icetime -d $(DEVICE) -mtr $@ $<
+
+prog: $(PROJ).bin
+	iceprog $<
+
+sudo-prog: $(PROJ).bin
+	@echo 'Executing prog as root!!!'
+	sudo iceprog $<
+
+tb.out: $(wildcard *.v) $(wildcard tb/*.v)
+	iverilog $^ -o $@
+
+sim: tb.out
+	./tb.out
+
+clean:
+	rm -rf $(PROJ).blif $(PROJ).asc $(PROJ).rpt $(PROJ).bin tb.out tb.vcd
+
+.SECONDARY:
+.PHONY: all prog clean sim