Subversion Repositories t6507lp

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

////                                                                    ////

//// t2600 IP Core                                                      ////

////                                                                    ////

//// This file is part of the t2600 project                             ////

//// http://www.opencores.org/cores/t2600/                              ////

////                                                                    ////

//// Description                                                        ////

//// VGA controller                                                     ////

////                                                                    ////

//// TODO:                                                              ////

//// - Feed the controller with data                                    ////

////                                                                    ////

//// Author(s):                                                         ////

//// - Gabriel Oshiro Zardo, gabrieloshiro@gmail.com                    ////

//// - Samuel Nascimento Pagliarini (creep), snpagliarini@gmail.com     ////

////                                                                    ////

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

////                                                                    ////

//// Copyright (C) 2001 Authors and OPENCORES.ORG                       ////

////                                                                    ////

//// 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;       ////

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

//// later version.                                                     ////

////                                                                    ////

//// 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.                                                           ////

////                                                                    ////

//// 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                           ////

////                                                                    ////

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

`include "timescale.v"

//module vga_tester (reset_n, clk_50);

module vga_tester(line, vert_counter);

//input reset_n;

//input clk_50;

output reg [479:0] line;

output reg [4:0] vert_counter;

reg reset_n;

reg clk_50;

reg clk_358; // 3.58mhz

reg [3:0] counter;

reg [3:0] red;

reg [3:0] green;

reg [3:0] blue;

reg [11:0] pixel0;

reg [11:0] pixel1;

reg [11:0] pixel2;

reg [11:0] pixel3;

reg [11:0] pixel4;

reg [11:0] pixel5;

reg [11:0] pixel6;

reg [11:0] pixel7;

reg [11:0] pixel8;

reg [11:0] pixel9;

always #10 clk_50 <= !clk_50;

initial begin

        reset_n = 1'b0;

        clk_50 = 1'b0;

        #20;

        reset_n = 1'b1;

end

always @ (posedge clk_50 or negedge reset_n) begin

        if (reset_n == 0) begin

                clk_358 <= 1'b0;

                counter <= 4'd0;

                vert_counter <= 6'd0;

                red <= 4'b1010;

                green <= 4'b0001;

                blue <= 4'b1110;

                line <= 480'd0;

        end

        else begin

                if (counter == 4'h6) begin

                        clk_358 <= !clk_358;

                        counter <= 4'd0;

                end

                else begin

                        counter <= counter + 4'd1;

                end

        end

end

always @ (posedge clk_358 or negedge reset_n) begin

        if (reset_n == 0) begin

        end

        else begin

                line <= {pixel0, pixel1, pixel2, pixel3, pixel4, pixel5, pixel6, pixel7, pixel8, pixel9,

                         pixel0, pixel1, pixel2, pixel3, pixel4, pixel5, pixel6, pixel7, pixel8, pixel9,

                         pixel0, pixel1, pixel2, pixel3, pixel4, pixel5, pixel6, pixel7, pixel8, pixel9,

                         pixel0, pixel1, pixel2, pixel3, pixel4, pixel5, pixel6, pixel7, pixel8, pixel9};

                if (vert_counter == 5'd29) begin

                        vert_counter <= 6'd0;

                end

                else begin

                        vert_counter <= vert_counter + 5'd1;

                end

        end

end

always @(*) begin

        pixel0 = {red, green, blue};

        pixel1 = {red, green, blue};

        pixel2 = {red, green, blue};

        pixel3 = {red, green, blue};

        pixel4 = {red, green, blue};

        pixel5 = {red, green, blue};

        pixel6 = {red, green, blue};

        pixel7 = {red, green, blue};

        pixel8 = {red, green, blue};

        pixel9 = {red, green, blue};

end

endmodule