It will take some looking (?check stats?) but I really suspect the problem
is with a timeout waiting for a response with no devices. Can you compare
0,1,2 devices on the bus?
Paul
On 11/18/06, Jan Kandziora <[EMAIL PROTECTED]> wrote:
Am Samstag, 18. November 2006 22:52 schrieb Paul Alfille:
> That's not good.
>
If 160ms/scan is the worst time you measured, it means there's hope I
don't
need to change parts of the machine design. Scanning locks connected to an
USB adaptor is quite faster (at least on my development PC), but the
machine
should use the DS2482-800 instead.
I will setup a stable measurement environment on the actual platform
around
next wednesday.
> If we can't resolve it this way, we may have to add a special "file"
that
> checks for ANY device on the bus rapidly.
>
Hm. I don't understand where the difference would be. Could you explain?
My idea was, the problem lies somewhere in the timing of onewire or i2c,
or in
the timing requirements of the host OS. To achieve a rapid scan of a
(sub)bus, one has to issue the "triplet" command rapidly. This could
exhaust
the process' timeslice and such, the owserver etc. is getting "niced".
Maybe
a static priority for owserver helps? I haven't checked so far.
Kind regards
Jan
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