====呼吸灯测试文件====

<code verilog>
// --------------------------------------------------------------------
// >>>>>>>>>>>>>>>>>>>>>>>>> COPYRIGHT NOTICE <<<<<<<<<<<<<<<<<<<<<<<<<
// --------------------------------------------------------------------
// Module: Breath_led_test
// 
// Author: Step
// 
// Description: Testbench for Water_led
// 
// Web: www.ecbcamp.com
// 
// --------------------------------------------------------------------
// Code Revision History :
// --------------------------------------------------------------------
// Version: |Mod. Date:   |Changes Made:
// V1.0     |2015/11/11   |Initial ver
// --------------------------------------------------------------------
`timescale 1ns / 100ps
module Breath_led_test;

parameter CLK_PERIOD = 40;  //CLK_PERIOD=40ns, Frequency=25MHz
parameter CNT_NUM = 6;

reg sys_clk;
initial
	sys_clk = 1'b0;
always
	sys_clk = #(CLK_PERIOD/2) ~sys_clk;

reg sys_rst_n;  //active low
initial 
	begin
		sys_rst_n = 1'b0;
		#100;
		sys_rst_n = 1'b1;
	end

wire Breath_led;
Breath_led #(.CNT_NUM(CNT_NUM))
Breath_led_uut
(
.clk_in(sys_clk),
.rst_n_in(sys_rst_n),
.Breath_led(Breath_led)
);
	
endmodule

</code>