Your understanding is correct. I'll check the code.
I assume your sensors are separately powered, rather than parasytic. Also, a minor point, that 750msec is actually 1sec, based on large experience of the 1-wire community. Paul Alfille -----Original Message----- From: [EMAIL PROTECTED] on behalf of Jim Duda Sent: Thu 5/25/2006 1:50 PM To: [email protected] Subject: [Owfs-developers] Question on Simultaneous Can someone please help me with simultaneous? My understanding is that writing a value to the simultaneous/temperature file will cause a temperature conversion, but not incure a long delay in the write operation, as compared to reading the actual temperature. I"m trying to insure that whenever I read a temperature value, I'm always reading from the cache, to avoid a long delay on the read response. I'm running owserver without a -t parameter, so that should default to 10 seconds for which data remains in the cache. I have 4 thermometers on owfs, all of which are attached to a hub. I have a perl script which does the following: On odd seconds, it issues a write of "1" to all the simultaneous/temperature files adjacent in the hierarchy to each thermometor. I'm assuming this starts a temperature conversion for each thermometer. I believe the typical time for a temperature conversion is 750mS. On even seconds, it issues a read of each temperature device. The reading of 4 devices appears to take 6 seconds. I was expecting the reads to be much quicker, I'm assuming they should be coming from the cache. I've also changed the delay between writing and reading to 2 seconds, but I get the same behavior. Is my understanding of "simultaneous" correct? Thanks, Jim ------------------------------------------------------- All the advantages of Linux Managed Hosting--Without the Cost and Risk! Fully trained technicians. The highest number of Red Hat certifications in the hosting industry. Fanatical Support. Click to learn more http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642 _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
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