// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.
//
// Each core or library found in this collection may have its own licensing terms. 
// The user should keep this in in mind while exploring these cores. 
//
// Redistribution and use in source and binary forms,
// with or without modification of this file, are permitted under the terms of either
//  (at the option of the user):
//
//   1. The GNU General Public License version 2 as published by the
//      Free Software Foundation, which can be found in the top level directory, or at:
// https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html
//
// OR
//
//   2.  An ADI specific BSD license as noted in the top level directory, or on-line at:
// https://github.com/analogdevicesinc/hdl/blob/dev/LICENSE
//
// ***************************************************************************
// ***************************************************************************

`timescale 1ns/100ps

module ad_lvds_in #(

  parameter   SINGLE_ENDED = 0,
  parameter   DEVICE_TYPE = 0,
  parameter   IODELAY_CTRL = 0,
  parameter   IODELAY_GROUP = "dev_if_delay_group") (

  // data interface

  input                   rx_clk,
  input                   rx_data_in_p,
  input                   rx_data_in_n,
  output  reg             rx_data_p,
  output  reg             rx_data_n,

  // delay-data interface

  input                   up_clk,
  input                   up_dld,
  input       [ 4:0]      up_dwdata,
  output      [ 4:0]      up_drdata,

  // delay-cntrl interface

  input                   delay_clk,
  input                   delay_rst,
  output                  delay_locked);


  // internal registers

  // internal signals

  wire                rx_data_p_s;
  wire                rx_data_n_s;

  // defaults

  assign up_drdata = 5'd0;
  assign delay_locked = 1'b1;

  // instantiations

  generate
  if (DEVICE_TYPE == 0) begin
  alt_ddio_in i_rx_data_iddr (
    .ck (rx_clk),
    .pad_in (rx_data_in_p),
    .dout ({rx_data_p_s, rx_data_n_s}));
  end
  endgenerate

  generate
  if (DEVICE_TYPE == 1) begin
  altddio_in #(.width (1), .lpm_hint("UNUSED")) i_rx_data_iddr (
    .inclock (rx_clk),
    .datain (rx_data_in_p),
    .dataout_h (rx_data_p_s),
    .dataout_l (rx_data_n_s),
    .inclocken (1'b1),
    .aclr (1'b0),
    .aset (1'b0),
    .sclr (1'b0),
    .sset (1'b0));
  end
  endgenerate

  always @(posedge rx_clk) begin
    rx_data_p <= rx_data_p_s;
    rx_data_n <= rx_data_n_s;
  end

endmodule

// ***************************************************************************
// ***************************************************************************