Subversion Repositories z80control

//Legal Notice: (C)2006 Altera Corporation. All rights reserved. Your

//use of Altera Corporation's design tools, logic functions and other

//software and tools, and its AMPP partner logic functions, and any

//output files any of the foregoing (including device programming or

//simulation files), and any associated documentation or information are

//expressly subject to the terms and conditions of the Altera Program

//License Subscription Agreement or other applicable license agreement,

//including, without limitation, that your use is for the sole purpose

//of programming logic devices manufactured by Altera and sold by Altera

//or its authorized distributors.  Please refer to the applicable

//agreement for further details.

module  VGA_Pattern     (       //      Read Out Side

                                                oRed,

                                                oGreen,

                                                oBlue,

                                                iVGA_X,

                                                iVGA_Y,

                                                iVGA_CLK,

                                                //      Control Signals

                                                iRST_N  );

//      Read Out Side

output  reg     [9:0]    oRed;

output  reg     [9:0]    oGreen;

output  reg     [9:0]    oBlue;

input   [9:0]            iVGA_X;

input   [9:0]            iVGA_Y;

input                           iVGA_CLK;

//      Control Signals

input                           iRST_N;

always@(posedge iVGA_CLK or negedge iRST_N)

begin

        if(!iRST_N)

        begin

                oRed    <=      0;

                oGreen  <=      0;

                oBlue   <=      0;

        end

        else

        begin

                oRed    <=      (iVGA_Y<120)                                    ?                       256     :

                                        (iVGA_Y>=120 && iVGA_Y<240)             ?                       512     :

                                        (iVGA_Y>=240 && iVGA_Y<360)             ?                       768     :

                                                                                                                                1023;

                oGreen  <=      (iVGA_X<80)                                             ?                       128     :

                                        (iVGA_X>=80 && iVGA_X<160)              ?                       256     :

                                        (iVGA_X>=160 && iVGA_X<240)             ?                       384     :

                                        (iVGA_X>=240 && iVGA_X<320)             ?                       512     :

                                        (iVGA_X>=320 && iVGA_X<400)             ?                       640     :

                                        (iVGA_X>=400 && iVGA_X<480)             ?                       768     :

                                        (iVGA_X>=480 && iVGA_X<560)             ?                       896     :

                                                                                                                                1023;

                oBlue   <=      (iVGA_Y<60)                                             ?                       1023:

                                        (iVGA_Y>=60 && iVGA_Y<120)              ?                       896     :

                                        (iVGA_Y>=120 && iVGA_Y<180)             ?                       768     :

                                        (iVGA_Y>=180 && iVGA_Y<240)             ?                       640     :

                                        (iVGA_Y>=240 && iVGA_Y<300)             ?                       512     :

                                        (iVGA_Y>=300 && iVGA_Y<360)             ?                       384     :

                                        (iVGA_Y>=360 && iVGA_Y<420)             ?                       256     :

                                                                                                                                128     ;

        end

end

endmodule