Subversion Repositories openarty

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

//

// Filename:    wbuinput.v

//

// Project:     FPGA library

//

// Purpose:     Coordinates the receiption of bytes, which are then translated

//              into codewords describing postential bus transactions.  This

//      includes turning the human readable bytes into more compact bits,

//      forming those bits into codewords, and decompressing any that reference

//      addresses within a compression table.

//

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

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

//

// Copyright (C) 2015-2016, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

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

//

//

module  wbuinput(i_clk, i_stb, i_byte, o_stb, o_codword);

        input                   i_clk, i_stb;

        input           [7:0]    i_byte;

        output  wire            o_stb;

        output  wire    [35:0]   o_codword;

        wire            hx_stb, hx_valid;

        wire    [5:0]    hx_hexbits;

        wbutohex        tobits(i_clk, i_stb, i_byte,

                                hx_stb, hx_valid, hx_hexbits);

        wire            cw_stb;

        wire    [35:0]   cw_word;

        wbureadcw       formcw(i_clk, hx_stb, hx_valid, hx_hexbits,

                                cw_stb, cw_word);

// `define      DEBUGGING

`ifdef  DEBUGGING

        assign  o_stb = cw_stb;

        assign  o_codword = cw_word;

`else

        wbudecompress   unpack(i_clk,cw_stb,cw_word, o_stb, o_codword);

`endif

endmodule