// ***************************************************************************
// ***************************************************************************
// Copyright 2011(c) Analog Devices, Inc.
//
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// are permitted provided that the following conditions are met:
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// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************

`timescale 1ns/100ps

module axi_adcfifo (

  // fifo interface

  adc_rst,
  adc_clk,
  adc_wr,
  adc_wdata,
  adc_wovf,

  // dma interface

  dma_clk,
  dma_wr,
  dma_wdata,
  dma_wready,
  dma_xfer_req,
  dma_xfer_status,

  // axi interface

  axi_clk,
  axi_resetn,
  axi_awvalid,
  axi_awid,
  axi_awburst,
  axi_awlock,
  axi_awcache,
  axi_awprot,
  axi_awqos,
  axi_awuser,
  axi_awlen,
  axi_awsize,
  axi_awaddr,
  axi_awready,
  axi_wvalid,
  axi_wdata,
  axi_wstrb,
  axi_wlast,
  axi_wuser,
  axi_wready,
  axi_bvalid,
  axi_bid,
  axi_bresp,
  axi_buser,
  axi_bready,
  axi_arvalid,
  axi_arid,
  axi_arburst,
  axi_arlock,
  axi_arcache,
  axi_arprot,
  axi_arqos,
  axi_aruser,
  axi_arlen,
  axi_arsize,
  axi_araddr,
  axi_arready,
  axi_rvalid,
  axi_rid,
  axi_ruser,
  axi_rresp,
  axi_rlast,
  axi_rdata,
  axi_rready);

  // parameters

  parameter   ADC_DATA_WIDTH = 128;
  parameter   DMA_DATA_WIDTH = 64;
  parameter   AXI_DATA_WIDTH = 512;
  parameter   DMA_READY_ENABLE = 1;
  parameter   AXI_SIZE = 2;
  parameter   AXI_LENGTH = 16;
  parameter   AXI_ADDRESS = 32'h00000000;
  parameter   AXI_ADDRLIMIT = 32'hffffffff;
  parameter   AXI_BYTE_WIDTH = AXI_DATA_WIDTH/8;

  // adc interface

  input                           adc_rst;
  input                           adc_clk;
  input                           adc_wr;
  input   [ADC_DATA_WIDTH-1:0]    adc_wdata;
  output                          adc_wovf;

  // dma interface

  input                           dma_clk;
  output                          dma_wr;
  output  [DMA_DATA_WIDTH-1:0]    dma_wdata;
  input                           dma_wready;
  input                           dma_xfer_req;
  output  [  3:0]                 dma_xfer_status;

  // axi interface

  input                           axi_clk;
  input                           axi_resetn;
  output                          axi_awvalid;
  output  [  3:0]                 axi_awid;
  output  [  1:0]                 axi_awburst;
  output                          axi_awlock;
  output  [  3:0]                 axi_awcache;
  output  [  2:0]                 axi_awprot;
  output  [  3:0]                 axi_awqos;
  output  [  3:0]                 axi_awuser;
  output  [  7:0]                 axi_awlen;
  output  [  2:0]                 axi_awsize;
  output  [ 31:0]                 axi_awaddr;
  input                           axi_awready;
  output                          axi_wvalid;
  output  [AXI_DATA_WIDTH-1:0]    axi_wdata;
  output  [AXI_BYTE_WIDTH-1:0]    axi_wstrb;
  output                          axi_wlast;
  output  [  3:0]                 axi_wuser;
  input                           axi_wready;
  input                           axi_bvalid;
  input   [  3:0]                 axi_bid;
  input   [  1:0]                 axi_bresp;
  input   [  3:0]                 axi_buser;
  output                          axi_bready;
  output                          axi_arvalid;
  output  [  3:0]                 axi_arid;
  output  [  1:0]                 axi_arburst;
  output                          axi_arlock;
  output  [  3:0]                 axi_arcache;
  output  [  2:0]                 axi_arprot;
  output  [  3:0]                 axi_arqos;
  output  [  3:0]                 axi_aruser;
  output  [  7:0]                 axi_arlen;
  output  [  2:0]                 axi_arsize;
  output  [ 31:0]                 axi_araddr;
  input                           axi_arready;
  input                           axi_rvalid;
  input   [  3:0]                 axi_rid;
  input   [  3:0]                 axi_ruser;
  input   [  1:0]                 axi_rresp;
  input                           axi_rlast;
  input   [AXI_DATA_WIDTH-1:0]    axi_rdata;
  output                          axi_rready;

  // internal signals

  wire                            adc_dwr_s;
  wire    [AXI_DATA_WIDTH-1:0]    adc_ddata_s;
  wire                            axi_rd_req_s;
  wire    [ 31:0]                 axi_rd_addr_s;
  wire    [  3:0]                 axi_xfer_status_s;
  wire                            axi_drst_s;
  wire                            axi_dvalid_s;
  wire    [AXI_DATA_WIDTH-1:0]    axi_ddata_s;
  wire                            axi_dready_s;

  // instantiations

  axi_adcfifo_adc #(
    .AXI_DATA_WIDTH (AXI_DATA_WIDTH),
    .ADC_DATA_WIDTH (ADC_DATA_WIDTH))
  i_adc_if (
    .adc_rst (adc_rst),
    .adc_clk (adc_clk),
    .adc_wr (adc_wr),
    .adc_wdata (adc_wdata),
    .adc_wovf (adc_wovf),
    .adc_dwr (adc_dwr_s),
    .adc_ddata (adc_ddata_s),
    .axi_drst (axi_drst_s),
    .axi_clk (axi_clk),
    .axi_xfer_status (axi_xfer_status_s));

  axi_adcfifo_wr #(
    .AXI_DATA_WIDTH (AXI_DATA_WIDTH),
    .AXI_SIZE (AXI_SIZE),
    .AXI_LENGTH (AXI_LENGTH),
    .AXI_ADDRESS (AXI_ADDRESS),
    .AXI_ADDRLIMIT (AXI_ADDRLIMIT))
  i_wr (
    .dma_xfer_req (dma_xfer_req),
    .axi_rd_req (axi_rd_req_s),
    .axi_rd_addr (axi_rd_addr_s),
    .adc_rst (adc_rst),
    .adc_clk (adc_clk),
    .adc_wr (adc_dwr_s),
    .adc_wdata (adc_ddata_s),
    .axi_clk (axi_clk),
    .axi_resetn (axi_resetn),
    .axi_awvalid (axi_awvalid),
    .axi_awid (axi_awid),
    .axi_awburst (axi_awburst),
    .axi_awlock (axi_awlock),
    .axi_awcache (axi_awcache),
    .axi_awprot (axi_awprot),
    .axi_awqos (axi_awqos),
    .axi_awuser (axi_awuser),
    .axi_awlen (axi_awlen),
    .axi_awsize (axi_awsize),
    .axi_awaddr (axi_awaddr),
    .axi_awready (axi_awready),
    .axi_wvalid (axi_wvalid),
    .axi_wdata (axi_wdata),
    .axi_wstrb (axi_wstrb),
    .axi_wlast (axi_wlast),
    .axi_wuser (axi_wuser),
    .axi_wready (axi_wready),
    .axi_bvalid (axi_bvalid),
    .axi_bid (axi_bid),
    .axi_bresp (axi_bresp),
    .axi_buser (axi_buser),
    .axi_bready (axi_bready),
    .axi_dwovf (axi_xfer_status_s[0]),
    .axi_dwunf (axi_xfer_status_s[1]),
    .axi_werror (axi_xfer_status_s[2]));

  axi_adcfifo_rd #(
    .AXI_DATA_WIDTH (AXI_DATA_WIDTH),
    .AXI_SIZE (AXI_SIZE),
    .AXI_LENGTH (AXI_LENGTH),
    .AXI_ADDRESS (AXI_ADDRESS),
    .AXI_ADDRLIMIT (AXI_ADDRLIMIT))
  i_rd (
    .dma_xfer_req (dma_xfer_req),
    .axi_rd_req (axi_rd_req_s),
    .axi_rd_addr (axi_rd_addr_s),
    .axi_clk (axi_clk),
    .axi_resetn (axi_resetn),
    .axi_arvalid (axi_arvalid),
    .axi_arid (axi_arid),
    .axi_arburst (axi_arburst),
    .axi_arlock (axi_arlock),
    .axi_arcache (axi_arcache),
    .axi_arprot (axi_arprot),
    .axi_arqos (axi_arqos),
    .axi_aruser (axi_aruser),
    .axi_arlen (axi_arlen),
    .axi_arsize (axi_arsize),
    .axi_araddr (axi_araddr),
    .axi_arready (axi_arready),
    .axi_rvalid (axi_rvalid),
    .axi_rid (axi_rid),
    .axi_ruser (axi_ruser),
    .axi_rresp (axi_rresp),
    .axi_rlast (axi_rlast),
    .axi_rdata (axi_rdata),
    .axi_rready (axi_rready),
    .axi_rerror (axi_xfer_status_s[3]),
    .axi_drst (axi_drst_s),
    .axi_dvalid (axi_dvalid_s),
    .axi_ddata (axi_ddata_s),
    .axi_dready (axi_dready_s));

  axi_adcfifo_dma #(
    .AXI_DATA_WIDTH (AXI_DATA_WIDTH),
    .DMA_DATA_WIDTH (DMA_DATA_WIDTH),
    .DMA_READY_ENABLE (DMA_READY_ENABLE))
  i_dma_if (
    .axi_clk (axi_clk),
    .axi_drst (axi_drst_s),
    .axi_dvalid (axi_dvalid_s),
    .axi_ddata (axi_ddata_s),
    .axi_dready (axi_dready_s),
    .axi_xfer_status (axi_xfer_status_s),
    .dma_clk (dma_clk),
    .dma_wr (dma_wr),
    .dma_wdata (dma_wdata),
    .dma_wready (dma_wready),
    .dma_xfer_req (dma_xfer_req),
    .dma_xfer_status (dma_xfer_status));

endmodule

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