// ***************************************************************************
// ***************************************************************************
// 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 system_top (

  inout   [14:0]  ddr_addr,
  inout   [ 2:0]  ddr_ba,
  inout           ddr_cas_n,
  inout           ddr_ck_n,
  inout           ddr_ck_p,
  inout           ddr_cke,
  inout           ddr_cs_n,
  inout   [ 3:0]  ddr_dm,
  inout   [31:0]  ddr_dq,
  inout   [ 3:0]  ddr_dqs_n,
  inout   [ 3:0]  ddr_dqs_p,
  inout           ddr_odt,
  inout           ddr_ras_n,
  inout           ddr_reset_n,
  inout           ddr_we_n,

  inout           fixed_io_ddr_vrn,
  inout           fixed_io_ddr_vrp,
  inout   [53:0]  fixed_io_mio,
  inout           fixed_io_ps_clk,
  inout           fixed_io_ps_porb,
  inout           fixed_io_ps_srstb,

  inout           iic_scl,
  inout           iic_sda,

  input           rx_clk_in_p,
  input           rx_clk_in_n,
  input           rx_frame_in_p,
  input           rx_frame_in_n,
  input   [ 5:0]  rx_data_in_p,
  input   [ 5:0]  rx_data_in_n,
  output          tx_clk_out_p,
  output          tx_clk_out_n,
  output          tx_frame_out_p,
  output          tx_frame_out_n,
  output  [ 5:0]  tx_data_out_p,
  output  [ 5:0]  tx_data_out_n,

  output          enable,
  output          txnrx,
  input           clkout_in,

  inout           gpio_clksel,
  inout           gpio_resetb,
  inout           gpio_sync,
  inout           gpio_en_agc,
  inout   [ 3:0]  gpio_ctl,
  inout   [ 7:0]  gpio_status,

  input           usb_fx3_uart_tx,
  output          usb_fx3_uart_rx,

  input   [ 7:0]  fifo_rdy,

  inout   [31:0]  data,
  output  [ 4:0]  addr,
  output          pclk,
  output          slcs_n,
  output          slrd_n,
  output          sloe_n,
  output          slwr_n,
  output          pktend_n,
  output          epswitch_n,

  input           flag_a,
  input           flag_b,

  output          reset_n,

  output  [ 2:0]  pmode,

  output          spi_csn,
  output          spi_clk,
  output          spi_mosi,
  input           spi_miso);

  // internal signals

  wire    [63:0]  gpio_i;
  wire    [63:0]  gpio_o;
  wire    [63:0]  gpio_t;

  // assignments

  assign pmode      = 3'b111;
  assign addr[4:2]  = 3'b000;

  assign epswitch_n = 1'b1;
  assign reset_n = 1'b1;

  // instantiations

  ad_iobuf #(.DATA_WIDTH(16)) i_iobuf (
    .dio_t ({gpio_t[51], gpio_t[46:32]}),
    .dio_i ({gpio_o[51], gpio_o[46:32]}),
    .dio_o ({gpio_i[51], gpio_i[46:32]}),
    .dio_p ({ gpio_clksel,        // 51:51
              gpio_resetb,        // 46:46
              gpio_sync,          // 45:45
              gpio_en_agc,        // 44:44
              gpio_ctl,           // 43:40
              gpio_status}));     // 39:32

  system_wrapper i_system_wrapper (
    .ddr_addr (ddr_addr),
    .ddr_ba (ddr_ba),
    .ddr_cas_n (ddr_cas_n),
    .ddr_ck_n (ddr_ck_n),
    .ddr_ck_p (ddr_ck_p),
    .ddr_cke (ddr_cke),
    .ddr_cs_n (ddr_cs_n),
    .ddr_dm (ddr_dm),
    .ddr_dq (ddr_dq),
    .ddr_dqs_n (ddr_dqs_n),
    .ddr_dqs_p (ddr_dqs_p),
    .ddr_odt (ddr_odt),
    .ddr_ras_n (ddr_ras_n),
    .ddr_reset_n (ddr_reset_n),
    .ddr_we_n (ddr_we_n),
    .enable (enable),
    .fixed_io_ddr_vrn (fixed_io_ddr_vrn),
    .fixed_io_ddr_vrp (fixed_io_ddr_vrp),
    .fixed_io_mio (fixed_io_mio),
    .fixed_io_ps_clk (fixed_io_ps_clk),
    .fixed_io_ps_porb (fixed_io_ps_porb),
    .fixed_io_ps_srstb (fixed_io_ps_srstb),
    .gpio_i (gpio_i),
    .gpio_o (gpio_o),
    .gpio_t (gpio_t),
    .iic_main_scl_io (iic_scl),
    .iic_main_sda_io (iic_sda),
    .otg_vbusoc (1'b0),
    .ps_intr_00 (1'b0),
    .ps_intr_01 (1'b0),
    .ps_intr_02 (1'b0),
    .ps_intr_03 (1'b0),
    .ps_intr_04 (1'b0),
    .ps_intr_05 (1'b0),
    .ps_intr_06 (1'b0),
    .ps_intr_07 (1'b0),
    .ps_intr_08 (1'b0),
    .ps_intr_09 (1'b0),
    .ps_intr_15 (1'b0),
    .rx_clk_in_n (rx_clk_in_n),
    .rx_clk_in_p (rx_clk_in_p),
    .rx_data_in_n (rx_data_in_n),
    .rx_data_in_p (rx_data_in_p),
    .rx_frame_in_n (rx_frame_in_n),
    .rx_frame_in_p (rx_frame_in_p),
    .spi0_clk_i (1'b0),
    .spi0_clk_o (spi_clk),
    .spi0_csn_0_o (spi_csn),
    .spi0_csn_1_o (),
    .spi0_csn_2_o (),
    .spi0_csn_i (1'b1),
    .spi0_sdi_i (spi_miso),
    .spi0_sdo_i (1'b0),
    .spi0_sdo_o (spi_mosi),
    .spi1_clk_i (1'b0),
    .spi1_clk_o (),
    .spi1_csn_0_o (),
    .spi1_csn_1_o (),
    .spi1_csn_2_o (),
    .spi1_csn_i (1'b1),
    .spi1_sdi_i (1'b0),
    .spi1_sdo_i (1'b0),
    .spi1_sdo_o (),
    .tdd_sync_i (1'b0),
    .tdd_sync_o (),
    .tdd_sync_t (),
    .tx_clk_out_n (tx_clk_out_n),
    .tx_clk_out_p (tx_clk_out_p),
    .tx_data_out_n (tx_data_out_n),
    .tx_data_out_p (tx_data_out_p),
    .tx_frame_out_n (tx_frame_out_n),
    .tx_frame_out_p (tx_frame_out_p),
    .txnrx (txnrx),
    .up_enable (gpio_o[47]),
    .up_txnrx (gpio_o[48]),
    .usb_fx3_uart_tx(usb_fx3_uart_tx),
    .usb_fx3_uart_rx(usb_fx3_uart_rx),
    .dma_rdy(),
    .dma_wmk(),
    .fifo_rdy(fifo_rdy[3:0]),
    .pclk(pclk),
    .data(data),
    .addr(addr[1:0]),
    .slcs_n(slcs_n),
    .slrd_n(slrd_n),
    .sloe_n(sloe_n),
    .slwr_n(slwr_n),
    // .epswitch_n(epswitch_n),
    .pktend_n(pktend_n)
  );

endmodule

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