[time-nuts] Low Cost GP-IB PCI card?

[Ulrich Bangert]

John,

of course, because it is simple serial communication, you don't get an
real pc interrupt on a device SRQ as would be possible with a hardware
GPIB pc card. You have to ask the interface in a fast manner to check
for the status of the SRQ line. But that is no real problem at 115200
Baud. 

BTW: Did you check for the 203 frequency comparator manual?

Regards
Ulrich Bangert   

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von John Ackermann N8UR
> Gesendet: Sonntag, 9. Juli 2006 17:01
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Low Cost GP-IB PCI card?
> 
> 
> That's good news, Ulrich.  SRQ programming is really 
> annoying, but sometimes you need to do it...
> 
> John
> ----
> 
> Ulrich Bangert said the following on 07/09/2006 09:58 AM:
> > Hi John,
> > 
> > the SPARK FUN part can definitely detect the status of the SRQ line 
> > and perform a serial poll to read the status bytes of attached 
> > devices. That were two of the major reasons why i preferred them 
> > against other cheaper circuits.
> > 
> > Regards
> > Ulrich Bangert
> > 
> > 
> >>-----Ursprüngliche Nachricht-----
> >>Von: time-nuts-bounces at febo.com
> >>[mailto:time-nuts-bounces at febo.com] Im Auftrag von John 
> Ackermann N8UR
> >>Gesendet: Sonntag, 9. Juli 2006 13:56
> >>An: Discussion of precise time and frequency measurement
> >>Betreff: Re: [time-nuts] Low Cost GP-IB PCI card?
> >>
> >>
> >>SAIDJACK at aol.com said the following on 07/08/2006 11:58 PM:
> >>
> >>> 
> >>>
> >>>
> >>>>I found that USB-GPIB controller. Looks like BSD and Linux are
> >>>>supported.
> >>>
> >>>
> >>>>http://www.sparkfun.com/commerce/product_info.php?products_id=549
> >>>
> >>>
> >>>Hi, I  bought one on Ebay, they work quite well. They used
> >>
> >>to be $99
> >>
> >>>at
> >>>Sparkfun, now  they raised the price, and it is out of  stock...
> >>
> >>Have you tried using SRQ or other features than simple
> >>read/wait/write sequences with it?  I found with one of the 
> >>old RS-232-to-GPIB converters that anything beyond reads and 
> >>writes was hard to handle.
> >>
> >>John
> >>
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> > 
> > 
> > 
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