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/* --------------------------------------------------------------------------------
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This file is part of FPGA Median Filter.
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FPGA Median Filter is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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FPGA Median Filter is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FPGA Median Filter. If not, see <http://www.gnu.org/licenses/>.
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-------------------------------------------------------------------------------- */
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// +----------------------------------------------------------------------------
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// +----------------------------------------------------------------------------
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// Universidade Federal da Bahia
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// Universidade Federal da Bahia
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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// PROJECT: FPGA Median Filter
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// PROJECT: FPGA Median Filter
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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// FILE NAME : median_tb.v
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// FILE NAME : median_tb.v
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// AUTHOR : João Carlos Bittencourt
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// AUTHOR : João Carlos Bittencourt
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// AUTHOR'S E-MAIL : joaocarlos@ieee.org
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// AUTHOR'S E-MAIL : joaocarlos@ieee.org
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// RELEASE HISTORY
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// RELEASE HISTORY
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// VERSION DATE AUTHOR DESCRIPTION
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// VERSION DATE AUTHOR DESCRIPTION
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// 1.0 2013-08-27 joao.nunes initial version
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// 1.0 2013-08-27 joao.nunes initial version
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// KEYWORDS: median, filter, image processing
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// KEYWORDS: median, filter, image processing
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// PURPOSE: Testbench for Median filter.
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// PURPOSE: Testbench for Median filter.
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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module median_tb;
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module median_tb;
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localparam PERIOD = 10;
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localparam PERIOD = 10;
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localparam PIXEL_DATA_WIDTH = 8;
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localparam PIXEL_DATA_WIDTH = 8;
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localparam LUT_ADDR_WIDTH = 10; // Input LUTs
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localparam LUT_ADDR_WIDTH = 10; // Input LUTs
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localparam MEM_ADDR_WIDTH = 10; // Output Memory
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localparam MEM_ADDR_WIDTH = 10; // Output Memory
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reg clk;
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reg clk;
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reg rst_n;
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reg rst_n;
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always #(PERIOD/2) clk = ~clk;
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always #(PERIOD/2) clk = ~clk;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word0;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word0;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word1;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word1;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word2;
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reg [(PIXEL_DATA_WIDTH*4)-1:0] word2;
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wire [PIXEL_DATA_WIDTH-1:0] pixel1;
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wire [PIXEL_DATA_WIDTH-1:0] pixel1;
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wire [PIXEL_DATA_WIDTH-1:0] pixel2;
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wire [PIXEL_DATA_WIDTH-1:0] pixel2;
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wire [PIXEL_DATA_WIDTH-1:0] pixel3;
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wire [PIXEL_DATA_WIDTH-1:0] pixel3;
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wire [PIXEL_DATA_WIDTH-1:0] pixel4;
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wire [PIXEL_DATA_WIDTH-1:0] pixel4;
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wire [9:0] raddr_a;
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wire [9:0] raddr_a;
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wire [9:0] raddr_b;
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wire [9:0] raddr_b;
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wire [9:0] raddr_c;
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wire [9:0] raddr_c;
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wire [9:0] waddr;
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wire [9:0] waddr;
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median
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median
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#(
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#(
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.MEM_DATA_WIDTH(PIXEL_DATA_WIDTH*4),
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.MEM_DATA_WIDTH(PIXEL_DATA_WIDTH*4),
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.PIXEL_DATA_WIDTH(PIXEL_DATA_WIDTH),
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.PIXEL_DATA_WIDTH(PIXEL_DATA_WIDTH),
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.LUT_ADDR_WIDTH(LUT_ADDR_WIDTH),
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.LUT_ADDR_WIDTH(LUT_ADDR_WIDTH),
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.MEM_ADDR_WIDTH(MEM_ADDR_WIDTH)
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.MEM_ADDR_WIDTH(MEM_ADDR_WIDTH)
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) dut_u0 (
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) dut_u0 (
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.clk(clk), // Clock
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.clk(clk), // Clock
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.rst_n(rst_n), // Asynchronous reset active low
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.rst_n(rst_n), // Asynchronous reset active low
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.word0(word0),
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.word0(word0),
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.word1(word1),
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.word1(word1),
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.word2(word2),
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.word2(word2),
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.pixel1(pixel1),
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.pixel1(pixel1),
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.pixel2(pixel2),
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.pixel2(pixel2),
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.pixel3(pixel3),
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.pixel3(pixel3),
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.pixel4(pixel4),
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.pixel4(pixel4),
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.raddr_a(raddr_a),
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.raddr_a(raddr_a),
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.raddr_b(raddr_b),
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.raddr_b(raddr_b),
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.raddr_c(raddr_c),
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.raddr_c(raddr_c),
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.waddr(waddr)
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.waddr(waddr)
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);
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);
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initial begin
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initial begin
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clk = 1;
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clk = 1;
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rst_n = 0;
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rst_n = 0;
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word0 = 0;
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word0 = 0;
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word1 = 0;
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word1 = 0;
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word2 = 0;
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word2 = 0;
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#(PERIOD*3)
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#(PERIOD*3)
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rst_n = 1;
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rst_n = 1;
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word0 = {8'd160,8'd171,8'd164,8'd142};
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word0 = {8'd160,8'd171,8'd164,8'd142};
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word1 = {8'd123,8'd141,8'd149,8'd154};
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word1 = {8'd123,8'd141,8'd149,8'd154};
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word2 = {8'd163,8'd177,8'd171,8'd136};
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word2 = {8'd163,8'd177,8'd171,8'd136};
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#PERIOD
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#PERIOD
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word0 = {8'd167,8'd193,8'd171,8'd160};
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word0 = {8'd167,8'd193,8'd171,8'd160};
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word1 = {8'd174,8'd150,8'd123,8'd166};
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word1 = {8'd174,8'd150,8'd123,8'd166};
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word2 = {8'd142,8'd165,8'd162,8'd171};
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word2 = {8'd142,8'd165,8'd162,8'd171};
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#PERIOD
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#PERIOD
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word0 = {8'd168,8'd179,8'd146,8'd173};
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word0 = {8'd168,8'd179,8'd146,8'd173};
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word1 = {8'd171,8'd160,8'd152,8'd154};
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word1 = {8'd171,8'd160,8'd152,8'd154};
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word2 = {8'd156,8'd142,8'd147,8'd167};
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word2 = {8'd156,8'd142,8'd147,8'd167};
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#PERIOD
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#PERIOD
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word0 = {8'd123,8'd141,8'd149,8'd154};
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word0 = {8'd123,8'd141,8'd149,8'd154};
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word1 = {8'd163,8'd177,8'd171,8'd136};
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word1 = {8'd163,8'd177,8'd171,8'd136};
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word2 = {8'd204,8'd151,8'd140,8'd140};
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word2 = {8'd204,8'd151,8'd140,8'd140};
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#PERIOD
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#PERIOD
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word0 = {8'd174,8'd150,8'd123,8'd166};
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word0 = {8'd174,8'd150,8'd123,8'd166};
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word1 = {8'd142,8'd165,8'd162,8'd171};
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word1 = {8'd142,8'd165,8'd162,8'd171};
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word2 = {8'd142,8'd158,8'd149,8'd128};
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word2 = {8'd142,8'd158,8'd149,8'd128};
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#PERIOD
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#PERIOD
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word0 = {8'd171,8'd160,8'd152,8'd154};
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word0 = {8'd171,8'd160,8'd152,8'd154};
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word1 = {8'd156,8'd142,8'd147,8'd167};
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word1 = {8'd156,8'd142,8'd147,8'd167};
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word2 = {8'd159,8'd128,8'd131,8'd160};
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word2 = {8'd159,8'd128,8'd131,8'd160};
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repeat (100) @(negedge clk);
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repeat (100) @(negedge clk);
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$stop;
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$stop;
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end
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end
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