read_4state_value_test.v

来自「pli_handbook_examples_pc verilog hdl 与C」· Verilog 代码 · 共 41 行

/**********************************************************************
 * $read_4state_value example -- Verilog HDL test bench.
 *
 * Verilog test bench to test the $read_4state_value PLI application.
 *
 * For the book, "The Verilog PLI Handbook" by Stuart Sutherland
 *  Book copyright 1999, Kluwer Academic Publishers, Norwell, MA, USA
 *   Contact: www.wkap.il
 *  Example copyright 1998, Sutherland HDL Inc, Portland, Oregon, USA
 *   Contact: www.sutherland.com or [phone]
 *********************************************************************/
`timescale 1ns / 1ns
module test;
  reg        reg1;
  reg [31:0] reg2;
  reg [0:51] reg3;
  real       r1;

  initial
    begin
      reg1 = 1'b0;
      reg2 = 32'hF0F0F0F0;
      reg3 = {13{4'b01zx}};
      r1   = 3.1415;

      #1 $read_4state_value("Hello world");
      #1 $read_4state_value(r1);
      #1 $read_4state_value(reg1);
      #1 $read_4state_value(reg2);
      #1 $read_4state_value(reg3);
      #1 $read_4state_value(reg3[1]);
      #1 $read_4state_value(reg3[4:48]);

      #1 $finish;
    end

endmodule

/**********************************************************************/