• 数字系统设计练习(七)—— 简单数码管显示


    一、实验硬软件环境:

    1. EDA软件:Vivado2019
    2. 实验开发板:Basys3 FPGA套件

    二、实验内容:

      实现的电路功能为:本次实验中实现一个简单的数码管显示控制电路,要求四个按键对应4个数码管,当按键1按下, 数码管1显示1;当按键2按下, 数码管2显示2;当按键3按下,数码管3显示3;当按键4按下,数码管显示4;没有按键的时候,数码管同时显示0。

      数码管的基本原理及实验板数码管对应的管脚配置分别如图所示。

    三、 具体实现

    1. 设计源码
       1 `timescale 1ns / 1ps
       2 //////////////////////////////////////////////////////////////////////////////////
       3 // Company: 
       4 // Engineer: 
       5 // 
       6 // Create Date: 2020/08/14 20:01:14
       7 // Design Name: 
       8 // Module Name: nixietube
       9 // Project Name: 
      10 // Target Devices: 
      11 // Tool Versions: 
      12 // Description: 
      13 // 
      14 // Dependencies: 
      15 // 
      16 // Revision:
      17 // Revision 0.01 - File Created
      18 // Additional Comments:
      19 // 
      20 //////////////////////////////////////////////////////////////////////////////////
      21 
      22 
      23 module nixietube(
      24     input [3:0] key1,
      25     output reg [3:0] key2,
      26     output reg [7:0] out
      27     );
      28     
      29     always @(key1)
      30     begin
      31         case(key1)
      32             4'b0001: 
      33                 begin
      34                     key2 = 4'b1110; out = 8'b1001_1110;
      35                 end
      36             4'b0010: 
      37                 begin
      38                     key2 = 4'b1101; out = 8'b0010_0100;
      39                 end
      40             4'b0100: 
      41                 begin
      42                     key2 = 4'b1011; out = 8'b0000_1100;
      43                 end
      44             4'b1000: 
      45                 begin
      46                     key2 = 4'b0111; out = 8'b1001_1000;
      47                 end
      48             default: 
      49                 begin
      50                     key2 = 4'b0000; out = 8'b0000_0010;
      51                 end
      52         endcase
      53     end
      54 endmodule
      View Code
    2. 仿真代码
       1 `timescale 1ns / 1ps
       2 //////////////////////////////////////////////////////////////////////////////////
       3 // Company: 
       4 // Engineer: 
       5 // 
       6 // Create Date: 2020/08/15 16:04:31
       7 // Design Name: 
       8 // Module Name: nixietube_tb
       9 // Project Name: 
      10 // Target Devices: 
      11 // Tool Versions: 
      12 // Description: 
      13 // 
      14 // Dependencies: 
      15 // 
      16 // Revision:
      17 // Revision 0.01 - File Created
      18 // Additional Comments:
      19 // 
      20 //////////////////////////////////////////////////////////////////////////////////
      21 
      22 
      23 module nixietube_tb;
      24     reg [3:0] key;
      25     wire [3:0] switch;
      26     wire [7:0] out;
      27     
      28     nixietube uut(
      29         .key(key),
      30         .switch(switch),
      31         .out(out)
      32     );
      33     
      34     initial
      35     begin
      36         key = 4'b0000;
      37         #100 key = 4'b0001;
      38         #100 key = 4'b0010;
      39         #100 key = 4'b0100;
      40         #100 key = 4'b1000;
      41         #100;
      42     end
      43 endmodule
      View Code
    3. 波形图
    4. 约束文件
       1 set_property PACKAGE_PIN R2 [get_ports key[0]]
       2 set_property IOSTANDARD LVCMOS33 [get_ports key[0]]
       3 set_property PACKAGE_PIN T1 [get_ports key[1]]
       4 set_property IOSTANDARD LVCMOS33 [get_ports key[1]]
       5 set_property PACKAGE_PIN U1 [get_ports key[2]]
       6 set_property IOSTANDARD LVCMOS33 [get_ports key[2]]
       7 set_property PACKAGE_PIN W2 [get_ports key[3]]
       8 set_property IOSTANDARD LVCMOS33 [get_ports key[3]]
       9 set_property PACKAGE_PIN W4 [get_ports switch[0]]
      10 set_property IOSTANDARD LVCMOS33 [get_ports switch[0]]
      11 set_property PACKAGE_PIN V4 [get_ports switch[1]]
      12 set_property IOSTANDARD LVCMOS33 [get_ports switch[1]]
      13 set_property PACKAGE_PIN U4 [get_ports switch[2]]
      14 set_property IOSTANDARD LVCMOS33 [get_ports switch[2]]
      15 set_property PACKAGE_PIN U2 [get_ports switch[3]]
      16 set_property IOSTANDARD LVCMOS33 [get_ports switch[3]]
      17 set_property PACKAGE_PIN W7 [get_ports out[7]]
      18 set_property IOSTANDARD LVCMOS33 [get_ports out[7]]
      19 set_property PACKAGE_PIN W6 [get_ports out[6]]
      20 set_property IOSTANDARD LVCMOS33 [get_ports out[6]]
      21 set_property PACKAGE_PIN U8 [get_ports out[5]]
      22 set_property IOSTANDARD LVCMOS33 [get_ports out[5]]
      23 set_property PACKAGE_PIN V8 [get_ports out[4]]
      24 set_property IOSTANDARD LVCMOS33 [get_ports out[4]]
      25 set_property PACKAGE_PIN U5 [get_ports out[3]]
      26 set_property IOSTANDARD LVCMOS33 [get_ports out[3]]
      27 set_property PACKAGE_PIN V5 [get_ports out[2]]
      28 set_property IOSTANDARD LVCMOS33 [get_ports out[2]]
      29 set_property PACKAGE_PIN U7 [get_ports out[1]]
      30 set_property IOSTANDARD LVCMOS33 [get_ports out[1]]
      31 set_property PACKAGE_PIN V7 [get_ports out[0]]
      32 set_property IOSTANDARD LVCMOS33 [get_ports out[0]]
      View Code
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  • 原文地址:https://www.cnblogs.com/mantha/p/13633778.html
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