'Scope capacitance and/or grounding has provided temporary "solutions" to
many problems for me, but the ultimate solution has always been to clean up
the signal path. Have you checked the quality of the ground connection?
How about ground loops? In the worst cases, I've actually soldered a
capacitor across the terminals of the receiving device, but only as a last
resort.
Norm
> -----Original Message-----
> From: Peter Wurmsdobler [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, October 17, 2000 11:01 AM
> To: Stuart Hughes; Tomasz Motylewski
> Cc: [EMAIL PROTECTED]
> Subject: Re: [rtl] parallel port ISR two times?
>
> Hello,
>
> At the time of testing I just jused a signal generator and
> somehow the ISR was called several times. After connecting
> the scope to pin10, nAck, it worked again, funny? I guess
> the scope adds some capacity or lowers the resistance as
> it is an additional sink.
>
> Thanks to all,
> peterw
> --
> Dr. Peter Wurmsdobler
>
> CTM - Centre de Transfert des Microtechniques
> 39, av. de l'Observatoire, BP-1445, 25007 Besancon CEDEX 3
> TELEPHONE: +33 3 81 47 70 20 TELECOPIE: +33 3 81 47 70 21
> E-mail: [EMAIL PROTECTED]
>
> Ceterum censeo MIRCOSOFTem esse delendam.
> -- [rtl] ---
> To unsubscribe:
> echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
> echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
> ---
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/rtlinux/
-- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
---
For more information on Real-Time Linux see:
http://www.rtlinux.org/rtlinux/
