zedboard学习记录.1.纯PL流水灯

2023-08-16 18:42:52

环境：vivado 217.4

开发板： zedboard ver.d xc7z020clg484-1

1.打开Vivado新建一个RTL工程。

2.add source->add/create design resouce->create ->finish

3.写入内容。

 module FlowingLamp(

    input    wire            GCLK,  //PL 100mhz

    input    wire            BTNU,  //low

    output   wire    [:]   LED

    );

 wire    clk_100m;   //clk 100mhz

 wire    rst;        //reset

 reg     clk_2hz;    //0.5s

 reg     [:]   led_reg;

 reg     [:]  delay_cnt;

 assign LED      =   led_reg;

 assign clk_100m =   GCLK;

 assign rst      =   BTNU;

 //clk_2hz

 always@(posedge clk_100m or negedge rst)

 begin

     if(rst)begin

         clk_2hz   <= 'b0;

         delay_cnt <= 'h0;

     end

     else begin

         if(delay_cnt == 'd25_000_000 - 32'd1)begin

             delay_cnt <= 'h0;

             clk_2hz   <= ~clk_2hz;

         end

         else begin

             delay_cnt <= delay_cnt + 'b1;

         end

     end

 end

  //led_reg

 always @(posedge clk_2hz or posedge rst)

  begin

      if(rst)

          led_reg <= 'h01;

      else

          led_reg <= {led_reg[:],led_reg[]};

  end

 endmodule