Hello,
i have the Beaglebone Black. few weeks back was OK and I used to learn and do few projects. then I updated to latest Debian image (ver 9) and latest kernel.
However, I found out that none of my previous Python projects (via Adafruit_BBIO) will work. All complain about the GPIO (permission mostly even though I am running as usual as SUDO. note: they are all existing projects and all worked fine before).
Further tests revealed that only Adafruit libraries are not working, If I rewrite the test in bonescript, all work fine.
I went to /sys/class/GPIO, it seems all my GPIO pins are exported and cannot be exported or unexported (write error, invalid argument). however i can cd to any GPIO and set direction, value and the tests work.
Any idea what is going one here?
I have no other processes running and I have rebooted several times. I have updated to latest Adafruit_BBIO but no change. Rebooted several times, no change.
Thanks in advance.