TOOLCHAIN_PREFIX = riscv32-unknown-elf- # set to 4 for simulation FIRMWARE_COUNTER_BITS=18 all: example.bin ## ------------------- ## firmware generation firmware.elf: firmware.S firmware.c firmware.lds $(TOOLCHAIN_PREFIX)gcc \ -DSHIFT_COUNTER_BITS=$(FIRMWARE_COUNTER_BITS) \ -march=rv32i -Os -ffreestanding -nostdlib \ -o $@ firmware.S firmware.c \ --std=gnu99 -Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc chmod -x $@ firmware.bin: firmware.elf $(TOOLCHAIN_PREFIX)objcopy -O binary $< $@ chmod -x $@ firmware.hex: firmware.bin python3 ../../firmware/makehex.py $< 128 > $@ ## ------------------------------ ## main flow: synth/p&r/bitstream synth.json: example.v ../../picorv32.v firmware.hex yosys -v3 -l synth.log -p 'synth_ice40 -top top -json $@; write_verilog -attr2comment synth.v' $(filter %.v, $^) example.asc: synth.json example.pcf nextpnr-ice40 --hx8k --package ct256 --json $< --pcf example.pcf --asc $@ example.bin: example.asc icepack $< $@ ## ----------------- ## icarus simulation example_tb.vvp: example.v example_tb.v ../../picorv32.v firmware.hex iverilog -o $@ -s testbench $(filter %.v, $^) chmod -x $@ example_sim: example_tb.vvp vvp -N $< example_sim_vcd: example_tb.vvp vvp -N $< +vcd ## --------------------- ## post-synth simulation synth_tb.vvp: example_tb.v synth.json iverilog -o $@ -s testbench synth.v example_tb.v `yosys-config --datdir/ice40/cells_sim.v` chmod -x $@ synth_sim: synth_tb.vvp vvp -N $< synth_sim_vcd: synth_tb.vvp vvp -N $< +vcd ## --------------------- ## post-route simulation route.v: example.asc example.pcf icebox_vlog -L -n top -sp example.pcf $< > $@ route_tb.vvp: route.v example_tb.v iverilog -o $@ -s testbench $^ `yosys-config --datdir/ice40/cells_sim.v` chmod -x $@ route_sim: route_tb.vvp vvp -N $< route_sim_vcd: route_tb.vvp vvp -N $< +vcd ## --------------------- ## miscellaneous targets prog_sram: example.bin iceprog -S $< timing: example.asc example.pcf icetime -c 12 -tmd hx8k -P ct256 -p example.pcf -t $< view: example.vcd gtkwave $< example.gtkw ## ------ ## el fin clean: rm -f firmware.elf firmware.map firmware.bin firmware.hex rm -f synth.log synth.v synth.json route.v example.asc example.bin rm -f example_tb.vvp synth_tb.vvp route_tb.vvp example.vcd .PHONY: all prog_sram view clean .PHONY: example_sim synth_sim route_sim timing .PHONY: example_sim_vcd synth_sim_vcd route_sim_vcd