Yeah, I guess I read that wrong. Isn't fixed point fun ?! On Thu, Oct 27, 2016 at 7:44 AM, Mark A. Yoder <mark.a.yo...@gmail.com> wrote:
> So it was a bit unclear, I only teach for a living :->. I've fixed it a > bit. > > This must be an interesting topic. Over 5000 views in this group and 100 > views of the eLinux page. > > --Mark > > On Thursday, October 27, 2016 at 10:38:58 AM UTC-4, Jason Kridner wrote: >> >> >> >> On Oct 26, 2016, at 3:20 PM, William Hermans <yyr...@gmail.com> wrote: >> >> HI Mark, >> >> So here: http://elinux.org/EBC_Exercise_31_Dallas_1-Wire#Reading_the_ >> DS12B20 >> >> Shouldn't >> >> The *t=24437* is the temperature in C times 1000. Warm up the probe and >>> see what happens to the temp. >>> >>> >> I believe this is stated properly, but could be confusing. >> >> Be: >> >> The *t=24437* is the temperature in C times .001. Warm up the probe and >>> see what happens to the temp. >>> >> >> ? >> >> >> Perhaps you mean: >> Given t=24437, you can determine the temperature in C by multiplying t by >> .001. Warm up the probe and see what happens to the temp. >> >> You could also say by dividing by 1000. Mark's language was right because >> he was describing how t is derived from the temperature and not the other >> way around. >> >> >> I do like your courses though. Really easy for someone like me , who has >> yet had experience with one-wire devices. >> >> On Wed, Oct 26, 2016 at 7:23 AM, Mark A. Yoder <mark.a...@gmail.com> >> wrote: >> >>> 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, godsf...@gmail.com >>> 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, lorena...@gmail.com >>>>> 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 beagleboard...@googlegroups.com. >>> To view this discussion on the web visit https://groups.google.com/d/ms >>> gid/beagleboard/6a937fdb-7316-48b0-8b84-543757958c8c%40googlegroups.com >>> <https://groups.google.com/d/msgid/beagleboard/6a937fdb-7316-48b0-8b84-543757958c8c%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> 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 beagleboard...@googlegroups.com. >> To view this discussion on the web visit https://groups.google.com/d/ms >> gid/beagleboard/CALHSORoZHnv1PArG9zyCfV36esCb8T_%2BtJ- >> 1zy7amx8TMOQocA%40mail.gmail.com >> <https://groups.google.com/d/msgid/beagleboard/CALHSORoZHnv1PArG9zyCfV36esCb8T_%2BtJ-1zy7amx8TMOQocA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> >> -- > 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 beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/beagleboard/e6fb6f5d-8ce2-470e-923e-c1a63109774a%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/e6fb6f5d-8ce2-470e-923e-c1a63109774a%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORo33RbAaREVvakpMD8bwnUvF3HqpoXbxvBgAQp0ysZJ0Q%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
