cvs.zerfleddert.de Git - proxmark3-svn/blob - fpga/clk_divider.v

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2014 iZsh <izsh at fail0verflow.com>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 module clk_divider(input clk, input [7:0] divisor, output [7:0] div_cnt, output div_clk);
   9
  10         reg [7:0] div_cnt_ = 0;
  11         reg div_clk_;
  12         assign div_cnt = div_cnt_;
  13         assign div_clk = div_clk_;
  14
  15         always @(posedge clk)
  16         begin
  17                 if(div_cnt == divisor) begin
  18                         div_cnt_ <= 8'd0;
  19                         div_clk_ = !div_clk_;
  20                 end else
  21                         div_cnt_ <= div_cnt_ + 1;
  22         end
  23
  24 endmodule
  25