dff_3_pipe.v

/* --------------------------------------------------------------------------------
 This file is part of FPGA Median Filter.

    FPGA Median Filter is free software: 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.

    FPGA Median Filter 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with FPGA Median Filter.  If not, see <http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------------- */
/* +----------------------------------------------------------------------------
   Universidade Federal da Bahia
  ------------------------------------------------------------------------------
   PROJECT: FPGA Median Filter
  ------------------------------------------------------------------------------
   FILE NAME            : pixel_network.v
   AUTHOR               : João Carlos Bittencourt
   AUTHOR'S E-MAIL      : joaocarlos@ieee.org
   -----------------------------------------------------------------------------
   RELEASE HISTORY
   VERSION  DATE        AUTHOR        DESCRIPTION
   1.0      2013-08-13  joao.nunes    initial version
   -----------------------------------------------------------------------------
   KEYWORDS: dff, flip-flop, register bank
   -----------------------------------------------------------------------------
   PURPOSE: Group median pipeline registers.
   ----------------------------------------------------------------------------- */
module dff_3_pipe
#(
    parameter DATA_WIDTH = 8
)(
    input clk,
    input rst_n,
    input [DATA_WIDTH-1:0] d0,
    input [DATA_WIDTH-1:0] d1,
    input [DATA_WIDTH-1:0] d2,

    output reg [DATA_WIDTH-1:0] q0,
    output reg [DATA_WIDTH-1:0] q1,
    output reg [DATA_WIDTH-1:0] q2
);

always @(posedge clk or negedge rst_n)
begin : register_bank_3u
    if(~rst_n) begin
        q0 <= {DATA_WIDTH{1'b0}};
        q1 <= {DATA_WIDTH{1'b0}};
        q2 <= {DATA_WIDTH{1'b0}};
    end else begin
        q0 <= d0;
        q1 <= d1;
        q2 <= d2;
    end
end

endmodule