[nosredna000]

Thanks so much Micheal, Did you happen to find anything? If you give me some clues on how to do it I might be able to run with the ball and figure it out myself. Sorry for being a pain.

[nosredna000]

Hi,

No I’m making a TV tuner. The arduino is also controlling a AV receiver and everything works just fine. I set the channels via arduino.

I’m trying to add OSD so that you can see which channel you are tuning to. The problem is if you leave it trying to sync with the video source the OSD (I understand why) goes nuts because unless your on the right channel you have static. So what I’d like to do is have a black screen with the channel stuff. then turn the AV input back on after a delay. BTW My setup has a digital analog switch that turns on/off the video source.

Unfortunately for me when I cut the video source off (goes to open) and move the jumpers and switch I get a blue screen on my display. The only way I can get it to work is to turn off initOverlay() but then it doesn’t work when I go back to overlaying on good video source unless I turn on initOverlay(). So basically it seems if I can turn that function on/off while changing channels and have the video input go open (easy on my part) I would be in good shape. I’m a novice coder.. seems like this shouldn’t be that hard but I have no idea how to turn it on/off. Turning it on would be easy but how to disable?

Thanks for the help. I’m really far along in my project less this last step. I actually have it working with a max7456 chip but drawing lines and graphs is a bit awkward with the 7456. On top of that the 7456 is at end of life/discontinued.

[nosredna000]

Hi Micheal, The overlay switch does not seem to work after it has overlayed over video. For instance if you get the TV experimenter overlaying a video signal then unplug the video source the black video with overlay starts dancing and moving back and forth like the sync isn’t right. I’ve tried changing the jumper from sync to D9 and have the same results.

It is only when I comment out initOverlay(); I get a overlay on a black screen but no overlay over video.

Would you mind trying it on your end just to make sure I’m doing it right. I’m using the http://nootropicdesign.com/projectlab/2011/03/20/text-and-graphics-overlay/ sketch unmodified.

I need to be able to turn on/off the video source and keep the overlay.

Otherwise it seems like if I’m able to turn initOverlay(); on and off i twould work. How would I do that in the best way?

[nosredna000]

Oh not 100% set on this but thinking about using a Atmega 1284

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