VGA timing
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VGA timing

 
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Alan Randomdude
Guest
Posted: Fri Dec 24, 2004 3:15 am    Post subject: VGA timing Reply with quote
Hi there.

I'm new to PLD devices, and thought that building a VGA controller
would be fairly simple. I can't for the life of me get the damn thing
to work though, more specifically I can't get the monitor to sync.
I've disconnceted Green and Red and have tied Blue high. I'm trying to
spit out 640x480 at 52Hz.

I'm hoping that I've done something really simple wrong with the
timings, so I've uploaded the output of a simulation - can anyone have
a look at it and tell me if I have? Thanks..

Simulation output is at http://82.147.17.182/vga.vwf . Thanks.
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Dave Vanden Bout
Guest
Posted: Fri Dec 24, 2004 5:32 am    Post subject: Re: VGA timing Reply with quote
randomdude@gmail.com (Alan Randomdude) wrote in
news:d2b05bc6.0412231415.13412387@posting.google.com:

Quote:
http://82.147.17.182/vga.vwf

Here's a document that we wrote on a VGA generator. Maybe it will help you
get your sync timing correct.

http://www.xess.com/appnotes/an-101204-vgagen.pdf

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Dave Van den Bout
XESS Corp.
PO Box 33091
Raleigh NC 27636
Phn: (919) 363-4695
Fax: (801) 749-6501
devb@xess.com
http://www.xess.com
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