I got it to work properly in 4.4.x - using the universal cape and running config-pin P8_11 qep & config-pin P8_12 qep
On Friday, 3 February 2017 16:55:42 UTC, abhilash h wrote: > > For sure it will work. > On Fri, 3 Feb 2017 at 9:33 PM, Hugh Frater <[email protected] > <javascript:>> wrote: > >> I'll give 7.9 a go and let you know my findings, thanks. >> >> >> On Friday, 3 February 2017 13:40:05 UTC, abhilash h wrote: >> >>> I had used debian 7.9 >>> >> On Fri, 3 Feb 2017 at 7:05 PM, Hugh Frater <[email protected]> wrote: >>> >> Thanks, I'm currently trying to downgrade to a 3.8 revision, 1st attempt >>>> resulted in a 'won't boot, all the LEDs are on' so I guess I missed a step. >>>> >>>> >>>> On Friday, 3 February 2017 13:31:00 UTC, abhilash h wrote: >>>> >>>>> I had used debian . And it worked with busybox rfs and 3.8 kernel also >>>>> . >>>>> >>>> On Fri, 3 Feb 2017 at 6:20 PM, Hugh Frater <[email protected]> wrote: >>>>> >>>> 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 <[email protected]> >>>>>>> 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 [email protected]. >>>>>>> >>>>>>> >>>>>>>> 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 [email protected]. >>>>>> >>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/beagleboard/3e6b19d3-1c4a-4fea-9833-0d20fa29071a%40googlegroups.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/beagleboard/3e6b19d3-1c4a-4fea-9833-0d20fa29071a%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 [email protected]. >>>> >>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/39682a43-a9ad-42a6-9906-751c77e102bd%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/beagleboard/39682a43-a9ad-42a6-9906-751c77e102bd%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 [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/7502f82c-ed74-4b74-9999-ebcd51bb91e4%40googlegroups.com >> >> <https://groups.google.com/d/msgid/beagleboard/7502f82c-ed74-4b74-9999-ebcd51bb91e4%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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/f930e4ba-bff0-429d-b353-65ac6d502d8b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
