标签:des style blog http io ar color os sp
做硬件的第一个实例,一般当然是LED点灯啦~
硬件:ZedBoard
软件:ISE 14.7
1、新建工程
2、选择平台
3、新建完成后,输入如下代码:
`timescale 1ns / 1ps ////////////////////////////////////////////////////////////////////////////////// // Company: // Engineer: // // Create Date: 16:49:10 11/23/2014 // Design Name: // Module Name: main // Project Name: // Target Devices: // Tool versions: // Description: // // Dependencies: // // Revision: // Revision 0.01 - File Created // Additional Comments: // ////////////////////////////////////////////////////////////////////////////////// module main( input clk, output reg [7:0] led = 8‘h01 ); reg[31:0] cnt = 0; reg clk_buf = 0; reg direction = 0; always@(posedge clk) begin if (cnt==32‘d10000000) begin clk_buf <= !clk_buf; cnt <= 0; end else begin cnt <= cnt + 1; end end always@(posedge clk_buf) begin // direction control if (led==8‘h80) begin direction = 1‘b1; end else if (led==8‘h01) begin direction = 1‘b0; end // shift if (direction==1‘b0) begin led <= {led[6:0], 1‘b0}; // shift left end else if (direction==1‘b1) begin led <= {1‘b0,led[7:1]}; // shift right end end endmodule
4、添加如下的UCF文件:
# "LD0" NET "led[0]" LOC = T22; NET "led[0]" IOSTANDARD = LVCMOS33; # "LD1" NET "led[1]" LOC = T21; NET "led[1]" IOSTANDARD = LVCMOS33; # "LD2" NET "led[2]" LOC = U22; NET "led[2]" IOSTANDARD = LVCMOS33; # "LD3" NET "led[3]" LOC = U21; NET "led[3]" IOSTANDARD = LVCMOS33; # "LD4" NET "led[4]" LOC = V22; NET "led[4]" IOSTANDARD = LVCMOS33; # "LD5" NET "led[5]" LOC = W22; NET "led[5]" IOSTANDARD = LVCMOS33; # "LD6" NET "led[6]" LOC = U19; NET "led[6]" IOSTANDARD = LVCMOS33; # "LD7" NET "led[7]" LOC = U14; NET "led[7]" IOSTANDARD = LVCMOS33; # "GCLK" NET "clk" LOC = Y9; NET "clk" IOSTANDARD = LVCMOS33;
5、编译,下载
标签:des style blog http io ar color os sp
原文地址:http://www.cnblogs.com/craftor/p/4117293.html