On Sun, Apr 25, 2010 at 07:19:09AM -0400, Paul Alfille wrote:
> On Sun, Apr 25, 2010 at 3:39 AM, Steinar Midtskogen
> <stei...@latinitas.org> wrote:
> > I did some more testing. It turns out that the version doesn't
> > matter. It's just that sometimes I get an empty bus, sometimes not.
> > A restart of owserver seems to be what it takes to change it.
> > Digitemp, however, always lists everything.
> >
> > The setup: Linux PC->owserver->5 m active USB extension
> > cord->USB-RS232 converter (pl2303)->DS9097U->UVI sensor.
>
> Interesting. Perhaps turning on debugging would give some hints of
> where the problem lies.
> My money is on the pl2303 driver that I've had trouble with.
Well, he has a DS9097U at the end. This was the exact problem I had too:
devices would randomly not show up on the bus while digitemp saw them
reliably.
Steinar, this is what worked in that case:
/owfs/device wasn't there, but I could still cd to /owfs/device and it would
show up on the fly (owfs seemed to only scan the bus to populate
readdir, and if you had an error, some devices would go missing. But they
would be available later if I just cd'ed in the directory they were supposed
to be in).
I ended up "fixing" the problem by splitting my relatively long bus and
using a hub.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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