proxmark3/fpga-xc2s30/clk_divider.v
2022-03-20 09:31:53 +01:00

35 lines
1.2 KiB
Verilog

//-----------------------------------------------------------------------------
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// See LICENSE.txt for the text of the license.
//-----------------------------------------------------------------------------
module clk_divider(input clk, input [7:0] divisor, output [7:0] div_cnt, output div_clk);
reg [7:0] div_cnt_ = 0;
reg div_clk_;
assign div_cnt = div_cnt_;
assign div_clk = div_clk_;
always @(posedge clk)
begin
if(div_cnt == divisor) begin
div_cnt_ <= 8'd0;
div_clk_ = !div_clk_;
end else
div_cnt_ <= div_cnt_ + 1;
end
endmodule