//
// The ADI JESD204 Core is released under the following license, which is
// different than all other HDL cores in this repository.
//
// Please read this, and understand the freedoms and responsibilities you have
// by using this source code/core.
//
// The JESD204 HDL, is copyright © 2016-2017 Analog Devices Inc.
//
// This core is free software, you can use run, copy, study, change, ask
// questions about and improve this core. Distribution of source, or resulting
// binaries (including those inside an FPGA or ASIC) require you to release the
// source of the entire project (excluding the system libraries provide by the
// tools/compiler/FPGA vendor). These are the terms of the GNU General Public
// License version 2 as published by the Free Software Foundation.
//
// This core  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.
//
// You should have received a copy of the GNU General Public License version 2
// along with this source code, and binary.  If not, see
// <http://www.gnu.org/licenses/>.
//
// Commercial licenses (with commercial support) of this JESD204 core are also
// available under terms different than the General Public License. (e.g. they
// do not require you to accompany any image (FPGA or ASIC) using the JESD204
// core with any corresponding source code.) For these alternate terms you must
// purchase a license from Analog Devices Technology Licensing Office. Users
// interested in such a license should contact jesd204-licensing@analog.com for
// more information. This commercial license is sub-licensable (if you purchase
// chips from Analog Devices, incorporate them into your PCB level product, and
// purchase a JESD204 license, end users of your product will also have a
// license to use this core in a commercial setting without releasing their
// source code).
//
// In addition, we kindly ask you to acknowledge ADI in any program, application
// or publication in which you use this JESD204 HDL core. (You are not required
// to do so; it is up to your common sense to decide whether you want to comply
// with this request or not.) For general publications, we suggest referencing :
// “The design and implementation of the JESD204 HDL Core used in this project
// is copyright © 2016-2017, Analog Devices, Inc.”
//

`timescale 1ns/100ps

module tx_tb;
  parameter VCD_FILE = "tx_tb.vcd";
  parameter NUM_LANES = 4;
  parameter NUM_LINKS = 2;
  parameter OCTETS_PER_FRAME = 4;
  parameter FRAMES_PER_MULTIFRAME = 32;

  `include "tb_base.v"


  reg [NUM_LINKS-1:0] sync = {NUM_LINKS{1'b1}};
  reg [31:0] counter = 'h00;
  reg [31:0] tx_data = 'h00000000;

  wire tx_ready;
  wire tx_valid = 1'b1;
  wire [NUM_LANES-1:0] cfg_lanes_disable;
  wire [NUM_LINKS-1:0] cfg_links_disable;
  wire [7:0] cfg_beats_per_multiframe;
  wire [7:0] cfg_octets_per_frame;
  wire [7:0] cfg_lmfc_offset;
  wire cfg_sysref_oneshot;
  wire cfg_sysref_disable;
  wire cfg_continuous_cgs;
  wire cfg_continuous_ilas;
  wire cfg_skip_ilas;
  wire [7:0] cfg_mframes_per_ilas;
  wire cfg_disable_char_replacement;
  wire cfg_disable_scrambler;
  wire tx_ilas_config_rd;
  wire [1:0] tx_ilas_config_addr;
  wire [32*NUM_LANES-1:0] tx_ilas_config_data;

  always @(posedge clk) begin
    if (reset == 1'b1) begin
      tx_data <= 'h00000000;
    end else if (tx_ready == 1'b1) begin
      tx_data <= tx_data + 1'b1;
    end
  end

  /* Generate independent SYNCs
  *
  *  Each SYNC will be asserted/deasserted at different clock edges.
  *  The assertion/deassertion order: first SYNC[0], ..., last SYNC[NUM_LINKS-1]
  */
  always @(posedge clk) begin
    counter <= counter + 1'b1;
  end

  genvar i;
  generate
    for (i=1; i<=NUM_LINKS; i=i+1) begin: SYNC_GENERATOR
      always @(posedge clk) begin
        if (counter >= (32'h100 | (i << 4)) && counter <= (32'h300 | (i << 4))) begin
          sync[i-1] <= 1'b0;
        end else begin
          sync[i-1] <= 1'b1;
        end
      end
    end
  endgenerate

  // DUT with static configuration

  jesd204_tx_static_config #(
    .NUM_LANES(NUM_LANES),
    .NUM_LINKS(NUM_LINKS),
    .OCTETS_PER_FRAME(OCTETS_PER_FRAME),
    .FRAMES_PER_MULTIFRAME(FRAMES_PER_MULTIFRAME)
  ) i_cfg (
    .clk(clk),

    .cfg_lanes_disable(cfg_lanes_disable),
    .cfg_links_disable(cfg_links_disable),
    .cfg_beats_per_multiframe(cfg_beats_per_multiframe),
    .cfg_octets_per_frame(cfg_octets_per_frame),
    .cfg_lmfc_offset(cfg_lmfc_offset),
    .cfg_continuous_cgs(cfg_continuous_cgs),
    .cfg_continuous_ilas(cfg_continuous_ilas),
    .cfg_skip_ilas(cfg_skip_ilas),
    .cfg_mframes_per_ilas(cfg_mframes_per_ilas),
    .cfg_disable_char_replacement(cfg_disable_char_replacement),
    .cfg_disable_scrambler(cfg_disable_scrambler),
    .cfg_sysref_oneshot(cfg_sysref_oneshot),
    .cfg_sysref_disable(cfg_sysref_disable),

    .ilas_config_rd(tx_ilas_config_rd),
    .ilas_config_addr(tx_ilas_config_addr),
    .ilas_config_data(tx_ilas_config_data)
  );

  jesd204_tx #(
    .NUM_LANES(NUM_LANES),
    .NUM_LINKS(NUM_LINKS)
  ) i_tx (
    .clk(clk),
    .reset(reset),

    .cfg_lanes_disable(cfg_lanes_disable),
    .cfg_links_disable(cfg_links_disable),
    .cfg_beats_per_multiframe(cfg_beats_per_multiframe),
    .cfg_octets_per_frame(cfg_octets_per_frame),
    .cfg_lmfc_offset(cfg_lmfc_offset),
    .cfg_continuous_cgs(cfg_continuous_cgs),
    .cfg_continuous_ilas(cfg_continuous_ilas),
    .cfg_skip_ilas(cfg_skip_ilas),
    .cfg_mframes_per_ilas(cfg_mframes_per_ilas),
    .cfg_disable_char_replacement(cfg_disable_char_replacement),
    .cfg_disable_scrambler(cfg_disable_scrambler),
    .cfg_sysref_oneshot(cfg_sysref_oneshot),
    .cfg_sysref_disable(cfg_sysref_disable),

    .ilas_config_rd(tx_ilas_config_rd),
    .ilas_config_addr(tx_ilas_config_addr),
    .ilas_config_data(tx_ilas_config_data),

    .ctrl_manual_sync_request (1'b0),

    .tx_ready(tx_ready),
    .tx_valid(tx_valid),
    .tx_data({NUM_LANES{tx_data}}),

    .sync(sync),
    .sysref(sysref)
  );


endmodule