3 yosys
-p "synth_gowin -top demo -vout demo_syn.v" demo.v
4 $GOWIN_HOME/bin
/gowin
-d demo_syn.v
-cst demo.cst
-sdc demo.sdc
-p GW1NR-9-QFN88-6
-pn GW1NR-LV9QN88C
6/I5
-cfg device.cfg
-bit -tr -ph -timing -gpa -rpt -warning_all
6 # post place&route simulation (icarus verilog)
8 iverilog
-D POST_IMPL
-o testbench
-s testbench testbench.v \
9 demo_out.v $
(yosys-config
--datdir/gowin
/cells_sim.v
)