Attention, please: 
	A.if need Psram Simulation Model, please contact to Gowin FAE
    	B.add Psram Simulation Model to path: ../../tb/sim_model
    	C.instantiation Psram Simulation Model in tb.v file
	D.open /simulation/vcs_sim/vcs.sh, verdi.sh file,
	  then cancel note,below:
           #../../tb/sim_model/W9550D8MKY.v
	   #+incdir+../../tb/sim_model/
	E. for quickly simulation, in the ../../project/src/psram_memory_interface/temp/PSRAM/psram_param.v file,
	   add below:
	   `define SIM

../project/src/*.v : 
                        test design for PSRAM ip
../project/src/psram_memory_interface/psram_memory_interface.vo :
                        PSRAM IP
../tb/tb.v :
                        testbench for simulation
prim_sim.v:             simulation library, get from installation path of Gowin YunYuan software 
