OW::get('/uncached');

On Feb 19, 2008 3:01 PM, Chris Maresca <[EMAIL PROTECTED]> wrote:

> Hmm, that's a good question.  My init line is as follows:
>
> OW::init("$port --timeout_directory=1 --timeout_presence=1
> --timeout_volatile=1 --timeout_stable=1");
>
> Should I add other flags?  Sorry, I don't understand how the caching
> works, I thought that setting the above timeouts to 1 would effectively
> stop caching...
>
> Thx.
>
> Chris.
>
> Paul Alfille wrote:
> > uncached?
> >
> > On Feb 19, 2008 2:29 PM, Chris Maresca <[EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>> wrote:
> >
> >     I wrote the code in Perl.   Basically, it's a giant while()
> statement
> >     that calls OW::get twice each loop.  Each time OW::get is called, it
> >     stuffs the list of whatever gets returned into an array, then
> compares
> >     the two arrays for differences.  If there is a difference, it
> >     prints out
> >     the device ID.
> >
> >     It works, but not very reliably.  I found I had to insert a sleep
> >     statement (for 1 second) or it would not pickup new devices.   I'm
> now
> >     thinking that perhaps I should only do the baseline scan every 10
> >     loops
> >     or something.
> >
> >     Chris.
> >
> >     Paul Alfille wrote:
> >     > In my tests, OWFS can read and respond in < 0.1 second.
> >     >
> >     > There are some tricks for fast operation:
> >     > 1. Segment the 1-wire bus with separate a BUSMASTER for the chips
> >     > being polled.
> >     > 2. Don't use a DS2409
> >     > 3. Make sure your script doesn't have process start-up delays in
> >     the loop.
> >     >
> >     > What language are you planning to ue?
> >     >
> >     > Paul Alfille
> >     >
> >     > On Feb 19, 2008 2:12 AM, Chris Maresca
> >     >
> >     >     Why is it that you think a PC couldn't handle this?  I've
> >     built CNC
> >     >     machines with tolerances in the thousandths of an inch using
> >     real-time
> >     >     Linux, talking to a 1wire bus is trivial by comparison....
> >     >
> >     >
> >     >
> >
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