Xiangfu Liu wrote: > it's that possible that Ben read the VGA signal? > then display it in a small 320x240 screen?
Interesting idea :-) You could trigger on a hsync/vsync easily enough, probably with enough accuracy to get the pixel timing more or less right at 320x240. For reading the R/G/B signals, you would need some kind of fast ADC, though. Assuming VGA timing, your pixel clock at 320x240 with line doubling would be around 12.5 MHz. The ADC in the Ben can only do up to 187.5 kSa/s (the 4760 would be able to do 1 MSa/s) A chip like this one ought to be able to do the job, though: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ADC1173CIMTC-ND A simpler solution may be to use comparators (after all, you only need 1-2 bits per channel). This one may do the trick: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LMV7239M5CT-ND (There may be less expensive choices.) - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
