if you have it working why upgrade ? do you need a feature on bone 50 ? On 5/19/2016 5:57 AM, Wim Hellenthal wrote: > > Please help, > > > > I've already posted a mail before but got no reaction. I'm desperately > looking for support. I have a running quadrature detector using pin > P8_12 and P8_11 (eqep2), see the attached dts file. The code I’m using > is based on accessing the eQEP register using memory mapped IO (mmio). > > > > I’ve have used the detector without any problems on a BBB board > running the following debian version: > > Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 > armv7l GNU/Linux > > > > Now I’m trying to run exactly the same code on a newer debian version. > This is not working anymore!!!!! I managed to download and install > the following debian version (among some other versions): > > Linux beaglebone 3.8.13-bone50 #1 SMP Tue May 13 > 13:24:52 UTC 2014 armv7l GNU/Linux > > > > Note that I installed the bone50 version on a different BBB board. I > don’t want to mess up the correct working bone47 board. Both board > have 4G eMMC memory (revision - C) > > What I notice is that the folder structure for both version is different: > > > > For Bone47 it is: /sys/devices/ocp.3/48304000.epwmss > > For Bone50 it is: > /sys/devices/ocp.3/48304000.epwmss/48304180.eqep > > > Bone47; No means to read the position and the like. > > Bone50; Reading the position using *cat position* alway return zero, > this is also what I see running the mmio code. > > > So what could be the cause that the quadrature detector is no longer > working on debian version higher than 3.8.13-bone47? At least the > folder structure is different. Is this a kernel driver issue? Do I > have to redefine the .dts file? Any help would be highly appreciated. > > > > Best regards, > > Wim > > -- > 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] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/5bcb57fb-0cc5-42a2-b861-2ed059a5970f%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/5bcb57fb-0cc5-42a2-b861-2ed059a5970f%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/cdcef9b0-8ef8-d4b2-d734-66eccfb04fa5%40gmail.com. For more options, visit https://groups.google.com/d/optout.
