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 GW2A55-PBGA484-6 \
5 -warning_all -out demo_out.v
-rpt demo.rpt
-tr demo_tr.html
-bit demo.bit
7 # post place&route simulation (icarus verilog)
9 iverilog
-D POST_IMPL
-o testbench
-s testbench testbench.v \
10 demo_out.v $
(yosys-config
--datdir/gowin
/cells_sim.v
)