Subversion Repositories fpga-median

/* --------------------------------------------------------------------------------

 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: comparator, low, hight, median

   -----------------------------------------------------------------------------

   PURPOSE: Obtain the Median of a 3x3 mask.

   ----------------------------------------------------------------------------- */

module pixel_network

#(

    parameter DATA_WIDTH = 8

)(

    input [DATA_WIDTH-1:0] c3h,

    input [DATA_WIDTH-1:0] c3m,

    input [DATA_WIDTH-1:0] c3l,

    input [DATA_WIDTH-1:0] c2h,

    input [DATA_WIDTH-1:0] c2m,

    input [DATA_WIDTH-1:0] c2l,

    input [DATA_WIDTH-1:0] c1h,

    input [DATA_WIDTH-1:0] c1m,

    input [DATA_WIDTH-1:0] c1l,

    output [DATA_WIDTH-1:0] median

);

    wire [DATA_WIDTH-1:0] node_u0_lo;

    wire [DATA_WIDTH-1:0] node_u1_hi;

    wire [DATA_WIDTH-1:0] node_u1_lo;

    wire [DATA_WIDTH-1:0] node_u2_hi;

    wire [DATA_WIDTH-1:0] node_u3_lo;

    wire [DATA_WIDTH-1:0] node_u4_hi;

    wire [DATA_WIDTH-1:0] node_u5_hi;

    wire [DATA_WIDTH-1:0] node_u6_lo;

    wire [DATA_WIDTH-1:0] node_u7_hi;

    wire [DATA_WIDTH-1:0] node_u7_lo;

    wire [DATA_WIDTH-1:0] node_u8_hi;

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(0) // disable hight output

    ) node_u0 (

        .data_a(c3h),

        .data_b(c2h),

        // .data_hi(),

        .data_lo(node_u0_lo)

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u1 (

        .data_a(c3m),

        .data_b(c2m),

        .data_hi(node_u1_hi),

        .data_lo(node_u1_lo)

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(0), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u2 (

        .data_a(c2l),

        .data_b(c1l),

        .data_hi(node_u2_hi)

        // .data_lo()

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(0) // disable hight output

    ) node_u3 (

        .data_a(node_u0_lo),

        .data_b(c1h),

        // .data_hi(),

        .data_lo(node_u3_lo)

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(0), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u4 (

        .data_a(node_u1_lo),

        .data_b(c1m),

        .data_hi(node_u4_hi)

        // .data_lo()

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(0), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u5 (

        .data_a(c3l),

        .data_b(node_u2_hi),

        .data_hi(node_u5_hi)

        // .data_lo()

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(0) // disable hight output

    ) node_u6 (

        .data_a(node_u1_hi),

        .data_b(node_u4_hi),

        // .data_hi(),

        .data_lo(node_u6_lo)

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u7 (

        .data_a(node_u3_lo),

        .data_b(node_u6_lo),

        .data_hi(node_u7_hi),

        .data_lo(node_u7_lo)

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(0), // disable low output

        .HI_MUX(1) // disable hight output

    ) node_u8 (

        .data_a(node_u7_lo),

        .data_b(node_u5_hi),

        .data_hi(node_u8_hi)

        // .data_lo()

    );

    node

    #(

        .DATA_WIDTH(DATA_WIDTH),

        .LOW_MUX(1), // disable low output

        .HI_MUX(0) // disable hight output

    ) node_u9 (

        .data_a(node_u7_hi),

        .data_b(node_u8_hi),

        // .data_hi(),

        .data_lo(median)

    );

endmodule