fifo_2048x8_tb.tf

Xilinx高级试验的代码.zip 非常不错

`timescale  1 ns / 1 ns
module fifo_2048x8_tb;

    reg rd_clk, wr_clk, reset, wr, rd;

    reg [10:0] wr_addr, rd_addr;
    reg [7:0]  wr_data;
    reg [7:0]  misc_data [0:15];
    wire [7:0] rd_data;

    reg        done_writing;
    integer    i,j;
    
    fifo_2048x8 fifo_2048x8_inst
      (.rd_clk(rd_clk), 
       .wr_clk(wr_clk), 
       .wr(wr), 
       .rd(rd), 
       .reset(reset), 
       .wr_addr(wr_addr), 
       .rd_addr(rd_addr), 
       .wr_data(wr_data), 
       .rd_data(rd_data));

    initial
      begin
	  misc_data[0] = 8'h00;
	  misc_data[1] = 8'h01;
	  misc_data[2] = 8'h02;
	  misc_data[3] = 8'h03;
	  misc_data[4] = 8'h04;
	  misc_data[5] = 8'h05;
	  misc_data[6] = 8'h06;
	  misc_data[7] = 8'h07;
	  misc_data[8] = 8'h08;
	  misc_data[9] = 8'h09;
	  misc_data[10] = 8'h0a;
	  misc_data[11] = 8'h0b;
	  misc_data[12] = 8'h0c;
	  misc_data[13] = 8'h0d;
	  misc_data[14] = 8'h0e;
	  misc_data[15] = 8'h0f;
	  reset = 1;
	  rd_clk = 0;
	  wr_clk = 1;
	  rd = 0;
	  wr = 0;
	  done_writing = 0;
	  wr_data = 0;
	  rd_addr = 0;
	  wr_addr = 0;
	  #27 reset = 0;
      end // initial begin

    always #2.5 rd_clk = ~rd_clk;

    always #5 wr_clk = ~wr_clk;
    
    always
    begin
	@ (negedge reset);

	for (i = 0; i <= 15; i = i + 1)
	begin
	    wr_data <= misc_data[i];
	    wr_addr <= i;
	    for (j = 0; j <= 7; j = j + 1)
	    begin
		if (j == 7)
		  wr <= 1;
		else
		  wr <= 0;
		@ (posedge wr_clk);
	    end // for (j = 0; j <= 7; j = j + 1)
	end // for (i = 0; i <= 15; i = i + 1)
	done_writing = 1;
	wr <= 0;
	@ (posedge wr_clk);
    end // always begin

    always 
    begin    
	@ (negedge reset);

	@ (posedge done_writing);
	for (i = 0; i <= 15; i = i + 1)
	begin
	    rd_addr <= i;
	    for (j = 0; j <= 7; j = j + 1)
	    begin
		if (j == 7)
		  rd <= 1;
		else
		  rd <= 0;
		@ (posedge rd_clk);
	    end // for (j = 0; j <= 7; j = j + 1)
	end // for (i = 0; i <= 15; i = i + 1)
	rd <= 0;
	@ (posedge rd_clk);
	#100 $stop;
    end // always begin
endmodule // fifo_2048x8_tb