svga_defines.v

利用VHDL实现CPLD（EPM240T100C5）的VGA屏幕输出

//     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 2002 Xilinx, Inc.
//     All rights reserved.
//

/*

-------------------------------------------------------------------------------
   Title      : SVGA Video Timing Parameters
   Project    : MicroBlaze Demo Board
-------------------------------------------------------------------------------
   File       : svga_defines.v
   Company    : Xilinx, Inc.
   Created    : 2001/06/20
   Last Update: 2001/06/20
   Copyright  : (c) Xilinx Inc, 2001
-------------------------------------------------------------------------------
   Uses       : 
-------------------------------------------------------------------------------
   Used by    : SVGA_TIMING_GENERATION.v
-------------------------------------------------------------------------------
   Description: This module defines the video timing required.
			The user must remove the comments to enable 
			the required video mode.
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
*/

// DEFINE THE VARIOUS PIPELINE DELAYS

`define ZBT_PIPELINE_DELAY 	    2
`define ZBT_INTERFACE_DELAY  	2
`define CHARACTER_DECODE_DELAY  4	




//  640 X 480 @ 60Hz with a 25.175MHz pixel clock
`define H_ACTIVE		640	// pixels
`define H_FRONT_PORCH	16	// pixels
`define H_SYNCH			96	// pixels
`define H_BACK_PORCH	48	// pixels
`define H_TOTAL			800	// pixels

`define V_ACTIVE		480	// lines
`define V_FRONT_PORCH	11	// lines
`define V_SYNCH			2	// lines
`define V_BACK_PORCH	31	// lines
`define V_TOTAL			524	// lines


/*
//  640 X 480 @ 72Hz with a 31.500MHz pixel clock
`define H_ACTIVE		640	// pixels
`define H_FRONT_PORCH	24	// pixels
`define H_SYNCH			40	// pixels
`define H_BACK_PORCH	128	// pixels
`define H_TOTAL			832	// pixels

`define V_ACTIVE		480	// lines
`define V_FRONT_PORCH	9	// lines
`define V_SYNCH			3	// lines
`define V_BACK_PORCH	28	// lines
`define V_TOTAL			520	// lines
*/

/*
//  640 X 480 @ 75Hz with a 31.500MHz pixel clock
`define H_ACTIVE		640	// pixels
`define H_FRONT_PORCH	16	// pixels
`define H_SYNCH			96	// pixels
`define H_BACK_PORCH	48	// pixels
`define H_TOTAL			800	// pixels

`define V_ACTIVE		480	// lines
`define V_FRONT_PORCH	11	// lines
`define V_SYNCH			2	// lines
`define V_BACK_PORCH	32	// lines
`define V_TOTAL			525	// lines
*/

/*
// 640 X 480 @ 85Hz with a 36.000MHz pixel clock
`define H_ACTIVE		640	// pixels
`define H_FRONT_PORCH	32	// pixels
`define H_SYNCH			48	// pixels
`define H_BACK_PORCH	112	// pixels
`define H_TOTAL			832	// pixels

`define V_ACTIVE		480	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			3	// lines
`define V_BACK_PORCH	25	// lines
`define V_TOTAL			509	// lines
*/

/*
// 800 X 600 @ 56Hz with a 38.100MHz pixel clock
`define H_ACTIVE		800	// pixels
`define H_FRONT_PORCH	32	// pixels
`define H_SYNCH			128	// pixels
`define H_BACK_PORCH	128	// pixels
`define H_TOTAL			1088// pixels

`define V_ACTIVE		600	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			4	// lines
`define V_BACK_PORCH	14	// lines
`define V_TOTAL			619	// lines
*/

/*
// 800 X 600 @ 60Hz with a 40.000MHz pixel clock
`define H_ACTIVE		800	// pixels
`define H_FRONT_PORCH	40	// pixels
`define H_SYNCH			128	// pixels
`define H_BACK_PORCH	88	// pixels
`define H_TOTAL			1056// pixels

`define V_ACTIVE		600	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			4	// lines
`define V_BACK_PORCH	23	// lines
`define V_TOTAL			628	// lines
*/

/*
// 800 X 600 @ 72Hz with a 50.000MHz pixel clock
`define H_ACTIVE		800	// pixels
`define H_FRONT_PORCH	56	// pixels
`define H_SYNCH			120	// pixels
`define H_BACK_PORCH	64	// pixels
`define H_TOTAL			1040// pixels

`define V_ACTIVE		600	// lines
`define V_FRONT_PORCH	37	// lines
`define V_SYNCH			6	// lines
`define V_BACK_PORCH	23	// lines
`define V_TOTAL			666	// lines
*/

/*
// 800 X 600 @ 75Hz with a 49.500MHz pixel clock
`define H_ACTIVE		800	// pixels
`define H_FRONT_PORCH	16	// pixels
`define H_SYNCH			80	// pixels
`define H_BACK_PORCH	160	// pixels
`define H_TOTAL			1056// pixels

`define V_ACTIVE		600	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			2	// lines
`define V_BACK_PORCH	21	// lines
`define V_TOTAL			624	// lines
*/

/*
// 800 X 600 @ 85Hz with a 56.250MHz pixel clock
`define H_ACTIVE		800	// pixels
`define H_FRONT_PORCH	32	// pixels
`define H_SYNCH			64	// pixels
`define H_BACK_PORCH	152	// pixels
`define H_TOTAL			1048// pixels

`define V_ACTIVE		600	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			3	// lines
`define V_BACK_PORCH	27	// lines
`define V_TOTAL			631	// lines
*/

/*
// 1024 X 768 @ 60Hz with a 65.000MHz pixel clock
`define H_ACTIVE		1024// pixels
`define H_FRONT_PORCH	24	// pixels
`define H_SYNCH			136	// pixels
`define H_BACK_PORCH	160	// pixels
`define H_TOTAL			1344// pixels

`define V_ACTIVE		768	// lines
`define V_FRONT_PORCH	3	// lines
`define V_SYNCH			6	// lines
`define V_BACK_PORCH	29	// lines
`define V_TOTAL			806	// lines
*/

/*
// 1024 X 768 @ 70Hz with a 75.000MHz pixel clock
`define H_ACTIVE		1024// pixels
`define H_FRONT_PORCH	24	// pixels
`define H_SYNCH			136	// pixels
`define H_BACK_PORCH	144	// pixels
`define H_TOTAL			1328// pixels

`define V_ACTIVE		768	// lines
`define V_FRONT_PORCH	3	// lines
`define V_SYNCH			6	// lines
`define V_BACK_PORCH	29	// lines
`define V_TOTAL			806	// lines
*/

/*
// 1024 X 768 @ 75Hz with a 78.750MHz pixel clock
`define H_ACTIVE		1024// pixels
`define H_FRONT_PORCH	16	// pixels
`define H_SYNCH			96	// pixels
`define H_BACK_PORCH	176	// pixels
`define H_TOTAL			1312// pixels

`define V_ACTIVE		768	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			3	// lines
`define V_BACK_PORCH	28	// lines
`define V_TOTAL			800	// lines
*/

/*
// 1024 X 768 @ 85Hz with a 94.500MHz pixel clock
`define H_ACTIVE		1024// pixels
`define H_FRONT_PORCH	48	// pixels
`define H_SYNCH			96	// pixels
`define H_BACK_PORCH	208	// pixels
`define H_TOTAL			1376// pixels

`define V_ACTIVE		768	// lines
`define V_FRONT_PORCH	1	// lines
`define V_SYNCH			3	// lines
`define V_BACK_PORCH	36	// lines
`define V_TOTAL			808	// lines

*/