Video Generation w/ Mega128

Go To Last Post
7 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

There have been several threads recently about video signal generation using AVRs. Circuit Cellar Issue 161, December '03, has the following article:

Generate Video Using Software Thread Integration
Video generation made simple. Intrigued? Read on to learn how a research group at North Carolina State University used an ATmega128 micro to generate a monochrome NTSC video signal with software thread integration. The end result is a 240 × 256 frame buffer based
display that renders lines, circles, sprites, and text.

Lee

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Another article uses Mega32:

TV Oscilloscope
Is it possible to build a useful oscilloscope with a microcontroller and a TV? That’s the simple question that started Bruce on the path to developing the TV Scope, which is a minimal oscilloscope that has become a useful tool in Cornell University’s neurobiology laboratories.

Lee

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Many of the recent threads have dealt with color (colour for our friends on the other side of the ocean) video.

Monochrome is challenging but not outrageously so. Color is where you get into real difficulty.

These will be interesting to look over because tricks and insight can make the solution a lot easier. Thanks for the heads-up.

Jim Wagner

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi guys, I produced a color signal using a ATs908535 at 8 mhz using a cga monitor. The video res was 40x256 PAL. The res is low but It worked.
I could produce all of the 8 colors. Using resistors you can produce many more colors.

Pete

admin's test signature
 

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Even though it isn't a AVR, it is very interesting.
How about a old fashioned PONG video game?
It uses composite video being generated by a MSP430 MCU. It can generate a lot of neat ideas on doing video related things.
www.ti.com/msp430
http://focus.ti.com/lit/an/slaa1...

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Their are many sites with video generation by software.

Do a search. After you read up on it you will find it's
pretty easy to generate a video signal on an TV or monitor.

Pete

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

O know this post is old, but just in case... you can check this topic:

https://www.avrfreaks.net/index.p...

I have made a complete video arcade system with an Atmega64, 64 colors, 240x200 resolution with 2 voice sound routine...

Cedric, www.innovativedevice.com