Subversion Repositories nysa_sata

module debounce #(

  parameter INITIAL_STATE     = 0,

  parameter DEBOUNCE_COUNT    = 100

)(

  input         clk,

  input         in_signal,

  output  reg   out_signal

);

reg [DEBOUNCE_COUNT - 1: 0] debounce;

initial begin

  out_signal    <=  INITIAL_STATE;

  debounce      <=  INITIAL_STATE;

end

always @ (posedge clk) begin

  debounce  <= {debounce[(DEBOUNCE_COUNT - 2) : 0], in_signal};

  if (debounce[0] == 1 && (& debounce)) begin

    out_signal         <=  1;

  end

  else if ((debounce[0] == 0) && (~| debounce)) begin

    out_signal         <=  0;

  end

end

endmodule