Attention:
	1. if you reconfig the ip parameters,which reload the uhs2_psram_memory_interface.ipc and re-generator. 
	   please attention bits width of the top.v, tb.v, test.v file. for example, in the tb.v:
	   	O_ck,IO_dqs, IO_dq......

	   int the top.v file:
	   O_apsram_ck, IO_apsram_dqs, IO_apsram_dq, O_apsram_cs_n...........

	2. for simulation, please select “Simulation" in the IP core user interface.
	    for board test, please close“Simulation" in the IP core user interface.


1.Run Command
    method 1: do cmd.do , in the Transcript windows of the Modesim Tool

2.Files Introduction

    prim_sim.v                  :
                                simulation library
    cmd.do                      :
                                modesim  do(command) file
    compile.f                   :
                                modesim compile design file

