use separate build directory

Makefile

@@ -0,0 +1,45 @@
+PROJ = top
+PIN_DEF = pins.pcf
+DEVICE = hx8k
+PACKAGE = ct256
+BUILD_DIR = build
+
+SOURCE_V = $(wildcard hdl/*.v)
+TESTBENCH_V = $(wildcard hdl/tb/*.v)
+
+all: $(BUILD_DIR)/$(PROJ).rpt $(BUILD_DIR)/$(PROJ).bin
+
+$(BUILD_DIR)/%.blif: hdl/%.v
+	yosys -p 'synth_ice40 -top top -blif $@' $(SOURCE_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 $<
+
+$(BUILD_DIR):
+	mkdir $(BUILD_DIR)
+
+$(BUILD_DIR)/tb.out: $(BUILD_DIR) $(SOURCE_V) $(TESTBENCH_V)
+	iverilog $^ -o $@
+
+sim: $(BUILD_DIR)/tb.out
+	$(BUILD_DIR)/tb.out
+
+clean:
+	rm -rf $(BUILD_DIR)
+
+.SECONDARY:
+.PHONY: all prog clean sim