VCS仿真 Dump Memory

VCS仿真 Dump Memory

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两种方法

• vcs联合verdi生成fsdb文件
• vcs生成vpd文件

VCS联合verdi生成fsdb文件

1.testbench中加入如下语句：

initial begin
     $fsdbDumpfile("tb.fsdb");
     $fsdbDumpvars;
end

always@(posedge clk)
begin
  $fsdbDumpMDA(R1); //每个时钟dump出mem的值，verdi记录值的变化
  $fsdbDumpMDA(R2);
end

2.注意调用 vcs -debug_pp 开始仿真

3.测试使用的verilog代码与仿真脚本

testbench

`timescale 1ns/100ps

module Testbench;

  reg          clk;

  integer      i;
  reg          R1[7:0];
  reg [3:0]    R2[7:0];

  initial  begin
    clk = 0;  

	for (i=0; i<8; i=i+1) begin
	  R1[i] = 1'b0;
	  R2[i] = 4'h0;
	end

	#10;

	for (i=0; i<8; i=i+1) begin
	  R1[i] = $random;
	  R2[i] = $random;
	end

    repeat(5) @(posedge clk);

	for (i=0; i<8; i=i+1) begin
	  R1[i] = $random;
	  R2[i] = $random;
	end

    repeat(60) @(posedge clk);
    $finish;
  end

always #200 clk = ~clk;

initial begin
     $fsdbDumpfile("tb.fsdb");
     $fsdbDumpvars;
end

always@(posedge clk)
begin
  $fsdbDumpMDA(R1); //每个时钟dump出mem的值，verdi记录值的变化
  $fsdbDumpMDA(R2);
end


endmodule

注意:此处仅是示范dumpMemory，实际中需要每一个时钟沿都需dump数据

vcs仿真脚本

#!/bin/bash -f

export NOVAS_HOME="/EDA/Synopsys/verdi/vJ-2014.12-SP2"
export NOVAS_PLI="${NOVAS_HOME}/share/PLI/VCS/LINUX64"
export LD_LIBRARY_PATH="$NOVAS_PLI"

export NOVAS="${NOVAS_HOME}/share/PLI/VCS/LINUX64"

export novas_args="-P $NOVAS/novas.tab   $NOVAS/pli.a "

vcs +v2k -sverilog +vcs+lic+wait -full64 -debug_pp 
       +warn=noCDNYI,noIPDW,noILLGO,noTMR,noPHNE,noIRIID-W 
       -Mupdate +notimingcheck +nospecify 
       ${novas_args}
       -f file.f 

./simv

4.使用Verdi查看结果

verdi 打开波形文件，选择>>Tool>>Memory/MDA

5.截图(verdi)

vcs生成vpd文件

1.lab文件

testbench

`timescale 1ns/100ps

module Testbench;

  reg          clk;

  integer      i;
  reg          R1[7:0];
  reg [3:0]    R2[7:0];

  initial  begin
    clk = 0;  

	for (i=0; i<8; i=i+1) begin
	  R1[i] = 1'b0;
	  R2[i] = 4'h0;
	end

	#10;

	for (i=0; i<8; i=i+1) begin
	  R1[i] = $random;
	  R2[i] = $random;
	end

    repeat(5) @(posedge clk);

	for (i=0; i<8; i=i+1) begin
	  R1[i] = $random;
	  R2[i] = $random;
	end

    repeat(60) @(posedge clk);
    $finish;
  end

always #200 clk = ~clk;

initial begin
  $vcdpluson();
end

always@(posedge clk)
begin
    $vcdplusmemon();
end

endmodule

vcs脚本

vcs -full64 Testbench.v  -debug_pp +vcd+vcdpluson

./simv

2.截图(dve)

参考文献

http://www.edaboard.com/thread59624.html

verdi3手册