Op donderdag 14 juni 2018 21:06:03 CEST schreef Freek de Kruijf: > Op donderdag 14 juni 2018 17:56:41 CEST schreef Brüns, Stefan: > > On Donnerstag, 14. Juni 2018 17:50:56 CEST Alexander Graf wrote: > > > On 06/14/2018 05:43 PM, Freek de Kruijf wrote: > > > > Op woensdag 13 juni 2018 15:58:25 CEST schreef Alexander Graf: > > > >> On 13.06.18 14:27, Freek de Kruijf wrote: > > > > I used the strace and found that in fact the equivalent bash command: > > > > echo "4" > /sys/class/gpio/export > > > > gives the error message: > > > > -bash: echo: write error: Invalid argument > > > > This command should create new devices /sys/class/gpio/gpio4/* which > > > > one > > > > can use to change the behavior of the GPIO pins. > > > > > > > > What can be done to make this basic bash command work. > > > > Below some more information as root: > > > > # ls -l /sys/class/gpio/ > > > > total 0 > > > > --w------- 1 root root 4096 jun 14 17:41 export > > > > lrwxrwxrwx 1 root root 0 apr 23 09:40 gpiochip298 -> ../../devices/ > > > > platform/soc/20200000.gpio/gpio/gpiochip298 > > > > --w------- 1 root root 4096 jun 14 16:34 unexport > > > > > > Sounds like the library doesn't realize that there is an offset for GPIO > > > numbers on the system. The DT usually indicates what the respective > > > offset is. > > > > Unfortunately the RPi foundation kernel is patched to hardcode the offset > > to 0, so any of these simplistic wrappers only work with the foundation > > kernel, but not with the upstream kernel, or on any other boards. > > This made me think about a patch I made to generate a proper version og > RPi.GPIO for openSUSE, which is needed to compensate for the fact that > raspbian uses gpiochip0, where as you can see above, openSUSE uses a > non-zero value, namely 298. > > To get the RPi.GPIO packet I used pip, which is apparently a version that > assumes gpiochip0. > > I inspected build.opensuse.org and found that in the project hardware / > python-RPi.GPIO the patch is included. However generating it for armv6l, > armv7l, and aarch64 in openSUSE_Factory_ARM is disabled. It is not mentioned > for these architectures for Leap 42.3 and 15.0 and for Tumbleweed. > > Could this be enabled, such that the package appears in a repository, > preferably the standard repository for Leap 42.3, 15.0 and Tumbleweed?
Some time ago I already generated versions for the three architectures and for python 2 and 3. Must have slipped my older brain. I did a "pip uninstall RPi.GPIO" and installed my packet for python2 and armv6hl. Problem solved for me. Two years ago I already made a ticked for the product on sourceforge providing the patch, which should also work for /sys/class/gpio/gpiochip0 -- fr.gr. member openSUSE Freek de Kruijf -- To unsubscribe, e-mail: [email protected] To contact the owner, e-mail: [email protected]
