Jim - Where did you find 4.19? I haven't found it anywhere so far! On Wednesday, May 15, 2019 at 9:30:39 PM UTC-4, Jim F wrote: > > We upgraded to 4.19, loaded the 1W dtb from /lib/firmware and things just > work. I think it's looking for the 1 W interface to be on P9. 12 which > works out to Gpio 1-28 which is also known as gpio 60. At this point it > shows up under /sys/bus and "just works". Couldn't say that for 4.14 and > I've no idea why. > > Or there's a PRU-based approach which TJF can tell you about. Not sure > what the difference between the two is, though we only use it for a single > sensor. Maybe I'll try that out tomorrow. > > Jim > > On Wed, May 15, 2019, 8:13 PM Walter Cromer <wal...@edenconceptsllc.com > <javascript:> wrote: > >> I've made a lot of progress thanks to the Exploring Beaglebone book. I >> am turning AC pumps and motors on with relays that I control from the >> digital outputs through opto-isolators. But when I needed to read a water >> proof temperature probe, I got stuck. I bought the DS18B20 and didn't >> comprehend it was Dallas single-wire interface. I thought it was just a >> waterproof TMP36 which I was already reading successfully. >> >> The examples for the DS18B20 are all pre-UBoot.(I'm running 4.4.14 now). >> I compiled a device tree overlay but don't know how to get it loaded, where >> to put it so it gets loaded, what file to change and what the command >> should be to have it load on boot. Is this all in the book somewhere? If >> not, could you share a resource that would help me? >> >> On Wednesday, May 15, 2019 at 1:42:40 PM UTC-4, TJF wrote: >>> >>> >>> >>> Am Mittwoch, 15. Mai 2019 15:41:06 UTC+2 schrieb P B: >>>> >>>> Does anyone have any tips or any recommendations for learning resources >>>> to get over this hurdle? >>>> >>> >>> Check out libpruio <https://github.com/DTJF/libpruio> and its online >>> documentation >>> <http://users.freebasic-portal.de/tjf/Projekte/libpruio/doc/html/index.html>. >>> >>> No device tree trouble, all settings in your code (single sourced). >>> >>> Regards >>> >> -- >> 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 beagl...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/90814ecc-368c-46b5-9ade-d10e88d3d919%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/90814ecc-368c-46b5-9ade-d10e88d3d919%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> >
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