Hi Abhilash, That's interesting, I will try and downgrade. May I ask what image you are using now (Angstrom, Debian etc)?
Hugh On Friday, 3 February 2017 12:36:34 UTC, abhilash h wrote: > > Hi hugh, > > It never worked for me in 4.x kernel. I used to get same values. So i > swutched back to 3.8 kernel . > > On Fri, 3 Feb 2017 at 5:47 PM, Hugh Frater <hugh....@gmail.com > <javascript:>> wrote: > >> Hi, I'm getting started on a control system that needs to read 2x >> quadrature encoders. One is a 1000 line, the other a 2000 line, but that is >> really immaterial. I have the physical interface sorted (one needs a 26lv32 >> to glue it to the BBB, the other is open collector), and the traces look >> good on the scope. >> >> I'm running Jessie IOT with 4.4.36, I have disabled hdmi and universal >> cape. I can load Nathaniel Lewis' overlays (supplied with the clean install >> of Jessie) just fine with no errors in dmesg. >> >> However when I 'cat position' in each of the relevant sys entries (having >> moved my encoder A/B lines to the relevant pins each time), I get a >> changing value but it isn't meaningful. Am I missing something, or is it >> more likely that I've blown up the inputs? I did power on the servo drive >> (that was connected to the 26lv32 breakout board) by accident when the BBB >> wasn't powered up. >> >> I've tested with a simple 24ppr 'audio style' encoder and again don't get >> meaningful results. >> >> Do I have to mess about with config-pin for each of the eQEP inputs, or >> should loading the relevant dtbo file for the eQEP module (0, 1 2 etc) set >> up the pins for me? >> >> There's so much old documentation floating about it's hard to identify >> what is current and what is no longer relevant now that the universal-cape >> is in existence. >> >> Regards, Hugh >> >> -- >> 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 <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/c28fc73b-b2f4-4e73-8318-fd37599ef3b6%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/c28fc73b-b2f4-4e73-8318-fd37599ef3b6%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/3e6b19d3-1c4a-4fea-9833-0d20fa29071a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
