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<##//////////////////////////////////////////////////////////////////

////                                                             ////

////  Author: Eyal Hochberg                                      ////

////          eyal@provartec.com                                 ////

////                                                             ////

////  Downloaded from: http://www.opencores.org                  ////

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

////                                                             ////

//// Copyright (C) 2010 Provartec LTD                            ////

//// www.provartec.com                                           ////

//// info@provartec.com                                          ////

////                                                             ////

//// This source file may be used and distributed without        ////

//// restriction provided that this copyright statement is not   ////

//// removed from the file and that any derivative work contains ////

//// the original copyright notice and the associated disclaimer.////

////                                                             ////

//// This source file is free software; you can redistribute it  ////

//// and/or modify it under the terms of the GNU Lesser General  ////

//// Public License as published by the Free Software Foundation.////

////                                                             ////

//// This source 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 Lesser General Public License for more////

//// details. http://www.gnu.org/licenses/lgpl.html              ////

////                                                             ////

//////////////////////////////////////////////////////////////////##>

OUTFILE PREFIX_parallel_TOPO.v

ITER OX ORDER

ITER CX COEFF_NUM

ITER SX ADD_STAGES

//  Built In Parameters:

//  

//    Filter Order             = ORDER

//    Input Precision          = DIN_BITS

//    Coefficient Precision    = COEFF_BITS

//    Sum of Products Latency  = LATENCY

//    Number of multiplayers   = COEFF_NUM

module PREFIX_parallel_TOPO (PORTS);

        input  clk;

        input  reset;

        input  clken;

        input  [EXPR(COEFF_BITS-1):0] kCX;

        input  [EXPR(DIN_BITS-1):0] data_in;

        output [EXPR(DOUT_BITS-1):0] data_out;

        output valid_out;

        wire [EXPR(DIN_BITS-1):0] data_in_d0;

        wire [EXPR(DIN_BITS-1):0] data_in_dEXPR(OX+1);

        reg [EXPR(MULT_BITS-1):0] multCX;

        //delay inputs per multiplayer

    assign data_in_d0 = data_in;

    CREATE prgen_delayN.v DEFCMD(SWAP DELAY 1) DEFCMD(DEFINE CLKEN)

    prgen_delay1_en #(DIN_BITS) delay_dinOX (clk, reset, clken, data_in_dOX, data_in_dEXPR(OX+1));

        always @(posedge clk or posedge reset)

          if (reset)

            begin

                  multCX <= #FFD {MULT_BITS{1'b0}};

            end

      else if (clken)

            begin

                  multCX <= #FFD kCX * data_in_dCX;

            end

        //Pipline the output additions

        CREATE prgen_bintree_adder.v DEFCMD(SWAP INPUT_NUM COEFF_NUM)

        prgen_bintree_adder_COEFF_NUM #(MULT_BITS) prgen_bintree_adder(

                .clk(clk),

                .reset(reset),

                .data_inCX(multCX),

                .data_out(data_out),

                .valid_in(clken),

                .valid_out(valid_out)

        );

endmodule