do you think is it possible? vga-->prop-->displ
Hi,
I woke up with a wierd idea this morning...
Would it be possible to use the prop to read a VGA signal in input and use the "image" coming trhough to show it on a display?
now...let's assume low refresh rate and very few colors (2-4-16-256 probably)....
Thanks
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I woke up with a wierd idea this morning...
Would it be possible to use the prop to read a VGA signal in input and use the "image" coming trhough to show it on a display?
now...let's assume low refresh rate and very few colors (2-4-16-256 probably)....
Thanks
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Comments
This is one of those ideas that probably would be doable, but not really practical for anything.
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Unlike composite video the synch signals can be read directly or buffered with a spare comparator or two. Use the WAITPEQ/WAITPNE to synch up and then control the sample timing simply by judiciously arranging the ASM code and perhaps using a few dummy instructions to pad it out. VGA scan lines are 31.78us each which is easy enough for a cog to handle considering it doesn't have to worry about interrupts or anything else like that.
The idea is to build up a picture and refine it frame by frame by setting the RC DAC output voltage to a different level each time so that you just read in 3 bits at a time. If you were to take the output of the camera you could at least do a 8 color frame grab in the first frame and get better each time but of course there is the smearing if the input changes, so don't take too long.
Just an idea.
*Peter*