bone_capemgr.* - no such file or directory (Debian 8.2 2015-11-12)

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1

I upgraded my BeagleBone Black image for Debian 8.2, 2015-11-12.

When trying to view which overlays are enabled:

cd /sys/devices/bone_capemgr.*

I get the following error

bash: cd: /sys/devices/bone_capemgr.*: No such file or directory

This used to work out of the box on my older Debian image.

Can anyone explain why this may be?
I’m trying to get the PWM on P9_21 to work.

When I execute a python script using the Adafruit tutorial:

import Adafruit_BBIO.PWM as PWM
import time

PWM.start(“P9_22”, 50, 1000, 0)
print “Waiting”
time.sleep(2)
print “Finished”
PWM.stop(“P9_16”)
PWM.cleanup()

I get the following error:

IOError: [Errno 2] No such file or directory: '/slots’

Thank you for your time.

2

If you are going to use adafruit's lib, downgrade the kernel:

sudo apt-get update
sudo apt-get install linux-image-3.8.13-bone79
sudo reboot

Regards,

3

If you are going to use adafruit’s lib, downgrade the kernel:

sudo apt-get update
sudo apt-get install linux-image-3.8.13-bone79
sudo reboot

Or, port the software, and share with everyone :wink:

4

The cape management scheme looks to be very different in Jessie/Debian 8.2.
Also the kernel modules are different than Wheezy/Debian 7.9.

Is there an explanation online which explains the changes?
Any tips/pointers on how to track these kinds of changes would be very appreciated.

I’m specifically interested in module pruss_remoteproc.
I’ve been struggling to get the pru cape to work; I think this might help me move forward having this already set up in Jessie/Debian 8.2,
that is, if I can find the information on what is going on with this.

Regards,
Greg

5

Robert, after many many hours I was able to get almost everything working (well enough) in Debian 8.2; most of the details are described at:
https://groups.google.com/forum/#!category-topic/beagleboard/beaglebone-black/E2VG4uAb31o

6

Thanks RobertCNelson, appreciate your input. Downgrading certainly works. It’s a shame the adafruit library won’t work with Debian 8.2.

7

Thanks Bit Pusher. Interesting read, appreciate it.