Hi Pic addicts!
Can anyone of you think about a piece of code for 12c508/9, to be able to
detect and 'filter' a 1ms burst of 100khz (TTL levels), without any added
hardware?
Of course I can use an active filter and a rectifier-detector, or a tone
decoder, but the challenge is to detect the burst only by software,
filtering the present noise.
I'm still evaluating to consider the count of transitions averaged over
time, or perhaps some kind of digital-filter principle (IIR-FIR?).
I've got some experience working with Pics (my serial output 16F84-based
video frame grabber is working just fine), but I've read such a brilliant
ideas around here that any suggestion will be truly appreciated.

Have a nice weekend.

Marcelo Fornaso
from Argentina
marcelo@syyyysameri.com  (write 'sysameri')