Messages in this thread | | | Subject | Re: A/D converter | Date | Wed, 21 Apr 1999 13:40:21 +0100 | From | David Woodhouse <> |
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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.
---- ---- ---- David Woodhouse David.Woodhouse@mvhi.com Office: (+44) 1223 810302 Project Leader, Process Information Systems Mobile: (+44) 976 658355 Axiom (Cambridge) Ltd., Swaffham Bulbeck, Cambridge, CB5 0NA, UK. finger dwmw2@ferret.lmh.ox.ac.uk for PGP key.
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