On Thursday, May 19, 2016 at 3:29:22 PM UTC+2, Wulf Man wrote: > 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]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/5bcb57fb-0cc5-42a2-b861-2ed059a5970f%40googlegroups.com. > > For more options, visit https://groups.google.com/d/optout.
I understand your question. But unfortunatly all New puchased boards carry a version higher then bone47 that don't work either 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/66be5cb7-ba94-4c56-b749-4eebb8f71397%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
