Wim Hellenthal
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
evilwulfie
if you have it working why upgrade ?
do you need a feature on bone 50 ?
--
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.
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.
Wim Hellenthal
Regards Wim
Rick Mann
> On May 19, 2016, at 10:04 , Wim Hellenthal <whell...@gmail.com> wrote:
>
> I understand your question. But unfortunatly all New puchased boards carry a version higher then bone47 that don't work either
sudo apt-get update
apt-cache search linux-image
sudo apt-get install <the image you found above that you want>
sudo reboot
--
Rick Mann
rm...@latencyzero.com
J.W. Hellenthal
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to a topic in the Google Groups "BeagleBoard" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/beagleboard/vpBD2T138lg/unsubscribe.
To unsubscribe from this group and all its topics, send an email to beagleboard...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/30637994-E55E-481B-9E94-7FFDC4D06E8A%40latencyzero.com.
J.W. Hellenthal
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to a topic in the Google Groups "BeagleBoard" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/beagleboard/vpBD2T138lg/unsubscribe.
To unsubscribe from this group and all its topics, send an email to beagleboard...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/30637994-E55E-481B-9E94-7FFDC4D06E8A%40latencyzero.com.
Robert Nelson
None of those match it..
Your rootfs is to old, this was before we introduced the apt repo.
Regards,
J.W. Hellenthal
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to a topic in the Google Groups "BeagleBoard" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/beagleboard/vpBD2T138lg/unsubscribe.
To unsubscribe from this group and all its topics, send an email to beagleboard...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYgZBRdD_22HqN0fffZM7JisVVntt8mPrJ%3DcPptRxXZqVw%40mail.gmail.com.
abhilash h
I have tried Linux beaglebone 4.1.18-ti-r53 and its eqep is not working.