//     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
//     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
//     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
//     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
//     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
//     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
//     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
//     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
//     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
//     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
//     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
//     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//     FOR A PARTICULAR PURPOSE.
//
//     (c) Copyright 2004 Xilinx, Inc.
//     All rights reserved.
//
/*
-------------------------------------------------------------------------------
   Title      : White to Black Ramp Video Test Pattern
   Project    : XUP Virtex-II Pro Development System 
-------------------------------------------------------------------------------
   File       : RAMP.v
   Company    : Xilinx, Inc.
   Created    : 2004/08/12
   Last Update: 2004/08/30
   Copyright  : (c) Xilinx Inc, 2004
-------------------------------------------------------------------------------
   Uses       : 
-------------------------------------------------------------------------------
   Used by    : HW_BIST.v
-------------------------------------------------------------------------------
   Description: This module creates a white to black ramp video test pattern.
   				The number of ramps will depend on the video mode but a 
				640 x 480 display will result in 2.5 ramps. Each ramp is 256 pixels
			 	long. The ramp data is created from the pixel count output
				of the video timing generator.
	Conventions:
		All external port signals are UPPER CASE.
		All internal signals are LOWER CASE and are active HIGH.


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

module RAMP
(
pixel_clock,
pixel_count,
vga_ramp_data
);
input pixel_clock;
input [10:0] pixel_count;
output [7:0] vga_ramp_data;

// create the white to black ramp data in memory

assign 	vga_ramp_data[7:0] 	= ~pixel_count[7:0];

endmodule // RAMP