Subversion Repositories instruction_list_pipelined_processor_with_peripherals

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////    This file is part of the project                                                                                        ////

////    "instruction_list_pipelined_processor_with_peripherals"                                                         ////

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////  http://opencores.org/project,instruction_list_pipelined_processor_with_peripherals        ////

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////                             Author:                                                                                ////

////                            - Mahesh Sukhdeo Palve                                                                                                  ////

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////                                    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.            ////

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////                                    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;            ////

////                                    either version 2.1 of the License, or (at your option) any              ////

////                                    later version.                                                          ////

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////                                    This source is distributed in the hope that it will be                  ////

////                                    useful, but WITHOUT ANY WARRANTY; without even the implied              ////

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////                                    PURPOSE.  See the GNU Lesser General Public License for more            ////

////                                    details.                                                                ////

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////                                    You should have received a copy of the GNU Lesser General               ////

////                                    Public License along with this source; if not, download it              ////

////                                    from http://www.opencores.org/lgpl.shtml                                ////

////                                                                                                                    ////

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`include "timescale.v"

`include "defines.v"

module pgmCounter (clk, reset, branch, pcIn, pcOut);

        input clk, reset, branch;

        input [`instAddrLen-1:0] pcIn;

        output [`instAddrLen-1:0] pcOut;

        reg [`instAddrLen-1:0] pcOut = `instAddrLen'b0;

        always @ (posedge clk)

        begin

                if (reset)

                begin

                        pcOut = `instAddrLen'b0;

                        $write ("\nprogram counter module is reset. Starting at address 00h     ");

                end

                else

                begin

                        if(branch)

                        begin

                                pcOut = pcIn;

                                $write ("\nbranching at address %h", pcIn);

                        end

                        else

                        begin

                                pcOut = pcOut + 1'b1;

                        end

                end

        end     // end always

endmodule