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//// Copyright (C) 2018 Authors and OPENCORES.ORG                 ////

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//////////////////////////////////////////////////////////////////////

class spi_sequence_item

  extends uvm_sequence_item;

  `uvm_object_utils(spi_sequence_item)

  // --------------------------------------------------------------------

  rand int data_width; // data size in bits

  // --------------------------------------------------------------------

  logic miso_data[]; // data from slave to master

  logic mosi_data[]; // data from master to slave

  bit read;

  bit write;

  // --------------------------------------------------------------------

  function new(string name = "");

    super.new(name);

  endfunction : new

  // --------------------------------------------------------------------

  function void init(bit read, bit write, int data_width);

    this.read = read;

    this.write = write;

    this.data_width = data_width;

    this.miso_data = new[data_width];

    this.mosi_data = new[data_width];

    if(write)

      foreach(this.mosi_data[i])

        mosi_data[i] = 0;

  endfunction : init

  // // --------------------------------------------------------------------

  // function bit do_compare(uvm_object rhs, uvm_comparer comparer);

    // spi_sequence_item tested;

    // bit same;

    // if (rhs==null)

      // `uvm_fatal(get_type_name(), "| %m | comparison to a null pointer");

    // if (!$cast(tested,rhs))

      // same = 0;

    // else

      // same  = super.do_compare(rhs, comparer);

    // return same;

  // endfunction : do_compare

  // // --------------------------------------------------------------------

  // function void do_copy(uvm_object rhs);

    // spi_sequence_item item;

    // assert(rhs != null) else

      // `uvm_fatal(get_type_name(), "| %m | copy null transaction");

    // super.do_copy(rhs);

    // assert($cast(item,rhs)) else

      // `uvm_fatal(get_type_name(), "| %m | failed cast");

    // delay     = item.delay;

    // command   = item.command;

    // wr_full   = item.wr_full;

    // rd_empty  = item.rd_empty;

    // wr_data   = item.wr_data;

    // rd_data   = item.rd_data;

    // count     = item.count;

  // endfunction : do_copy

  // --------------------------------------------------------------------

  function string convert2string();

    string s0, s1, s2, s3;

    byte data[];

    s0 = $sformatf( "\n| %m | rd | wr | data width |\n");

    s1 = $sformatf( "| %m | %1h  | %1h  | %d |\n"

                  , read

                  , write

                  , data_width

                  );

    s0 = {s0, s1};

    if(read)

    begin

      data = {>>{miso_data}};

      foreach(data[i])

        s2 = {s2, $sformatf("%2h|", data[i])};

      s2 = $sformatf("| %m | miso_data: |%s\n" , s2);

      s0 = {s0, s2};

    end

    if(write)

    begin

      data = {>>{mosi_data}};

      foreach(data[i])

        s3 = {s3, $sformatf("%2h|", data[i])};

      s3 = $sformatf("| %m | mosi_data: |%s\n" , s3);

      s0 = {s0, s3};

    end

    return s0;

  endfunction : convert2string

// --------------------------------------------------------------------

endclass : spi_sequence_item