Thank you Paul for the hint! We shall add that to the help doc. The upgrade that Didier mentioned will be ready for public release very soon and will be posted on prologix.biz.
Regards, Abdul -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges Sent: Saturday, June 09, 2007 8:02 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] A Prologix GPIB-USB hint Poul, This has been fixed in the most recent release. Abdul added a ++read command that gets a single reading and then turns TALK off the instrument. I have not actually tried it, but I have received it from Abdul a week or 2 ago. The firmware isd easy to upgrade. Give him a call. Didier -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Poul-Henning Kamp Sent: Saturday, June 09, 2007 9:32 AM To: time-nuts@febo.com Cc: [EMAIL PROTECTED] Subject: [time-nuts] A Prologix GPIB-USB hint I spent the better part of an afternoon trying to figure this bit out, so to save somebody else the time: Some GPIB instruments will complain if addressed to talk when they have not been asked about anything. The HP6626A Power Supply is my present instance. The Prologix GPIB-USB has the "++auto" command which controls if it should automatically go into listen after a talk, the description on the manual page is: Enable (1) or disable (0) "listen-after-talk" feature Based on that description, one would, or at least I would, expect the behaviour to be that nothing happens until the next write, so that this would work: ++auto 0 idle bus write something device= listen send data idle bus ++auto 1 idle bus write something device= listen send data device= talk read something But that is not the case. "++auto 1" puts the device in talk mode immediately, so the sequence needs to be: ++auto 0 idle bus write something device= listen send data idle bus write something device= listen send data idle bus ++auto 1 device= talk read something You've been warned :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.13/842 - Release Date: 6/9/2007 10:46 AM _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
