debouncer.v

`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    07:13:02 02/14/2020 
// Design Name: 
// Module Name:    Debouncer 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
module Debouncer(
		 input 	button_in,
		 input 	clk,
		 output reg button_out);
   
   reg 			sync_0;
   reg 			sync_1;
   reg [15:0] 		tmpCounter;

   always @(posedge clk) sync_0 <= button_in;
   always @(posedge clk) sync_1 <= sync_0;

   always @(posedge clk) begin
      if (sync_1 == button_out)
	tmpCounter <= 16'b0;

      else begin
	 tmpCounter <= tmpCounter + 1;
	 if (tmpCounter == 16'hffff)
	   button_out <= ~button_out;
      end

   end // always @ (posedge clk)

endmodule