iverilog 简单使用

下载安装, 选择安装包最大的, 自带了 gtkwave.

其他平台可尝试使用包管理器直接下载, 比如:

sudo pacman -S iverilog gtkwave

示例

• demo.v

  `timescale 1ns/1ps
  
  module demo(
      input wire a,
      input wire b,
      output wire c
  );
  
  assign c = a & b;
  
  endmodule
  

• tb_demo.v

  `timescale 1ns/1ps
  
  
  module tb_demo();
      reg a;
      reg b;
      wire c;
  
      demo DUT(
          .a(a),
          .b(b),
          .c(c)
      );
  
  
      initial begin
          
          // 导出波形文件
          $dumpfile("wave.vcd"); 
          $dumpvars; 
  
          a = 0;
          b = 0;
          #100;
          a = 1;
          b = 0;
          #100;
          a = 0;
          b = 1;
          #100;
          a = 1;
          b = 1;
          #100;
          
      end
  
  endmodule
  

• 仿真

  $ iverilog demo.v tb_demo.v
  $ vvp ./a.out
  $ gtkwave wave.vcd