FIFO IP核（一）：功能简介

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<xlinx FPGA应用进阶 通用IP核详解和设计开发>读书摘录：

1.       

2.3.仿真模型

特点总结：1)复位后会有busy状态，需要等待wr_rst_busy信号低电平后才能正常写入

                 2)prog_full信号的高电平长度可调

                 3)仿真中的读状态很奇怪，并没有正常读取，都是XXX的状态。

所用的testbench：

`timescale 1ns / 1ps
module fifo_tb(
 
    );
    
        wire FIFO_READ_0_empty;
        wire [9:0]FIFO_READ_0_rd_data = 0;
            reg FIFO_READ_0_rd_en = 0;
        wire FIFO_WRITE_0_full;
            reg [9:0]FIFO_WRITE_0_wr_data= 0;
            reg FIFO_WRITE_0_wr_en= 0;
        wire prog_full_0;
            reg rd_clk_0= 0;
        wire rd_rst_busy_0;
            reg rst_0= 1;
            reg wr_clk_0= 0;
        wire wr_rst_busy_0;
        
        fifo_logicore_wrapper  i1mysyst
             (.FIFO_READ_0_empty(FIFO_READ_0_empty),
              .FIFO_READ_0_rd_data(FIFO_READ_0_rd_data),
              .FIFO_READ_0_rd_en(FIFO_READ_0_rd_en),
              .FIFO_WRITE_0_full(FIFO_WRITE_0_full),
              .FIFO_WRITE_0_wr_data(FIFO_WRITE_0_wr_data),
              .FIFO_WRITE_0_wr_en(FIFO_WRITE_0_wr_en),
              .prog_full_0(prog_full_0),
              .rd_clk_0(rd_clk_0),
              .rd_rst_busy_0(rd_rst_busy_0),
              .rst_0(rst_0),
              .wr_clk_0(wr_clk_0),
              .wr_rst_busy_0(wr_rst_busy_0));
 
    always #5   wr_clk_0 = ~wr_clk_0;
    always #20  rd_clk_0 = ~rd_clk_0;
    
initial begin 
    rst_0 = 1;
    #100;
    rst_0 = 0;
    #100;
    @(negedge wr_rst_busy_0)
    FIFO_WRITE_0_wr_en = 1'b1;
    repeat (512) begin 
    #10
    FIFO_WRITE_0_wr_data = FIFO_WRITE_0_wr_data + 10'd1;
    end
    #100;
    FIFO_WRITE_0_wr_en = 1'b0;
   
   #1000;
   
    FIFO_READ_0_rd_en = 1'b1;
    repeat (512) begin 
    #(40);
    end
    #100;
    FIFO_READ_0_rd_en = 1'b0;
    #400;
    $stop;
    end
endmodule

刘东华的xilinx系列FPGA芯片IP核详解>读书摘录：

1.

2.仿真结果

其他参考资料：

1、https://blog.youkuaiyun.com/xuexiaokkk/article/details/47753459