ZedBoard教程PL篇(1):点亮LED灯

 开发板环境：vivado2017.4

开发板：Zedboard 芯片型号：xc7z020clg484-1

本章主要使用用verilog编写一个流行灯代码控制PL端的八个LED

1.打开vivado2017.4

2.点击Create Project 新建工程，点击Next

3.填写工程名和选择工程存储路径，点击Next

点击Next

点击Next

点击Next

4.选择官方提供的板级包，并选择ZedBoard Zynq这个型号后面会显示芯片型号，点击Next

点击Finish，创建一个zynq工程

zynq工程界面，可以看到右边显示官方的开发板图片

 5.编写流水灯代码

新建led_test.v文件

点击Next

点击Create File新建工程，填写工程名为led_test

点击Finish

新建的led_test.v

 流水灯代码

`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date: 
// Design Name: 
// Module Name: led_test
// Project Name: 
// Target Devices: 
// Tool Versions: 
// Description: 
// 
// Dependencies: 
// 
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
// 
//////////////////////////////////////////////////////////////////////////////////


module led_test(
input           clock,//100M
input           reset,//SW0
output  [7:0]   led//LED0~LED7
    );

reg [32:0]  count;
reg [2:0]   led_cnt;
reg [7:0]   led_reg;

//0.5s计数    
always@(posedge clock or negedge reset)begin
        if(!reset)
            count   <=  32'd0;
        else if(count == 32'd50000000 - 1'b1) 
            count   <=  32'd0;
        else
            count   <=  count   +   1'b1;
end

//led计数0~7
always@(posedge clock or negedge reset)begin
        if(!reset)
            led_cnt   <=  3'd0;
        else if(count == 32'd50000000 - 1'b1) 
            led_cnt   <=  led_cnt   +   1'b1;
        else
            led_cnt   <=  led_cnt;
end

//根据计数值点亮led
always@(posedge clock or negedge reset)begin
        if(!reset)
            led_reg   <=  8'b00000000;
        else case(led_cnt) 
            0: led_reg  <=  8'b00000001;
            1: led_reg  <=  8'b00000010;
            2: led_reg  <=  8'b00000100;
            3: led_reg  <=  8'b00001000;
            4: led_reg  <=  8'b00010000;
            5: led_reg  <=  8'b00100000;
            6: led_reg  <=  8'b01000000;
            7: led_reg  <=  8'b10000000;
         default:led_reg  <=  8'b00000000;
        endcase     
end 

assign  led =   led_reg;                          
    
endmodule

 6.分配硬件管脚

led管脚

复位管脚直接使用SW0,这里不进行按键检测处理

 时钟管脚

点击RTL  ANALYSIS下面的Open Elaborated Design来分配管脚

  分配时钟管脚

  按Ctrl+S保存管脚约束文件

生成的管脚约束文件

  约束文件

set_property PACKAGE_PIN T22 [get_ports {led[0]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[0]}]
set_property PACKAGE_PIN T21 [get_ports {led[1]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[1]}]
set_property PACKAGE_PIN U22 [get_ports {led[2]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[2]}]
set_property PACKAGE_PIN U21 [get_ports {led[3]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[3]}]
set_property PACKAGE_PIN V22 [get_ports {led[4]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[4]}]
set_property PACKAGE_PIN W22 [get_ports {led[5]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[5]}]
set_property PACKAGE_PIN U19 [get_ports {led[6]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[6]}]
set_property PACKAGE_PIN U14 [get_ports {led[7]}]
set_property IOSTANDARD LVCMOS33 [get_ports {led[7]}]
set_property PACKAGE_PIN Y9 [get_ports clock]
set_property IOSTANDARD LVCMOS33 [get_ports clock]
set_property PACKAGE_PIN F22 [get_ports reset]
set_property IOSTANDARD LVCMOS33 [get_ports reset]

7.编译工程生成bit下载文件

 点击Generate Bitstream，生成bit文件

生成bit下载文件成功，点击Cancel关闭对话框

8.连接JTAG，下载bit文件运行

点击Open Target自动识别jtag

识别到了fpga芯片

右击选择Program Device

找到bit文件路径，然后点击Program进行下载

 注意将SW0打到上面，不然会一直对工程进行复位，LED也不会亮

 下面是流水灯部分效果图