Re: A/D converter

David Woodhouse (David.Woodhouse@mvhi.com)
Wed, 21 Apr 1999 13:40:21 +0100

root@chaos.analogic.com said:
> I hook a function generator to the printer port. The ioctl input to
> the device atomically reads the longword and resets it to zero. The a
> user-mode task reads this at 1-second intervals.

Have you tried this with your function generator connected directly to the ISA
IRQ line?

It's possible that the printer port hardware has a filtering effect - you might
well find that it's debounced.

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