I've just posted[1] updated instructions on how to use Dallas 1-wire devices on the Bone. I'm running: bone$ *uname -a* Linux yoder-debian-bone 4.4.21-ti-r47 #1 SMP Fri Sep 23 22:23:02 UTC 2016 armv7l GNU/Linux bone$ *cat /ID.txt* BeagleBoard.org Debian Image 2016-08-28
The instructions show how to deconfigure P9_12 so the 1-wire driver can run on it. --Mark [1] http://elinux.org/EBC_Exercise_31_Dallas_1-Wire On Sunday, January 19, 2014 at 8:42:49 PM UTC-5, [email protected] wrote: > > Can you post a photo of how you have them wired please? > > On Wednesday, December 4, 2013 8:51:26 AM UTC-5, Doug Edey wrote: >> >> I've got 3 DS18B20 sensors on my bus at the moment, providing you've got >> the sensors running in non-parasitic mode, I think you'll be fine. >> >> On Tuesday, December 3, 2013 8:13:31 PM UTC-5, [email protected] wrote: >>> >>> Thinking of replacing the dedicated microcontroller that runs my house >>> with a BBB. Being able to read the existing 1-Wire network will be >>> critical. Currently have 12 18B20 sensors on one bus, need more. Can the >>> kernel module described here actually address and read multiple sensors on >>> the same bus? Can it search and retrieve addresses from unknown sensors? >>> >>> I see people selling 8-port capes, as if maybe this is a simple one >>> device per bus routine... Wouldn't help me! >>> >>> As for the "considerations" of long buses, yes there was a learning >>> curve. I have both active pull-up and active pull-down, with careful >>> source-end termination. All cable is CAT-5, and all sensors are within 1m >>> of a single linear topology installation. In several cases the bus goes out >>> one pair of the CAT-5 to a distant sensor and comes back on another pair of >>> the same cable to continue to the next destination. Branching.in a star >>> fashion is death to 1-Wire. My current system works, reliably controlling >>> serious solar hot water and outdoor wood boiler operation that could blow >>> off expensive antifreeze fluid (a huge hassle to recharge) if anything >>> overheated. >>> >>> Great long-bus reference: >>> http://www.1wire.org/Files/Articles/1-Wire-Design%20Guide%20v1.0.pdf >>> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/6a937fdb-7316-48b0-8b84-543757958c8c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
