Zynq学习笔记（1）

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