On 07.11.2016 08:53, Didier Roche wrote: > Le 06/11/2016 à 11:50, Jacques Supcik a écrit : >> Dear community. >> >> I have a program <https://gitlab.com/telecom-tower/tower>, written in >> go, and running on a raspberry Pi 2, which displays messages on a LED >> panel. The panel <https://www.adafruit.com/product/2294> is made of >> "neo pixels" and is connected to the GPIO of the raspberry Pi. >> Internally, it uses the DMA and PWM to generate and accurate signals. >> >> The program currently runs well on a Raspbian system and I would like >> to move to ubuntu-core. I was able to build the snap and to deploy it >> on a raspberry Pi 2 running Core version 16. I installed the snap with >> "--dangerous", but as soon as the system configure the DMA/PWM/GPIO, >> it just freezes. >> >> I installed snappy-debug to check the logs and this is what I get: >> >> = AppArmor = >> Time: Nov 6 09:28:45 >> Log: apparmor="DENIED" operation="open" >> profile="snap.telecom-tower.daemon" name="/dev/vcio" pid=4441 >> comm="tower" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 >> File: /dev/vcio (read) >> >> = Seccomp = >> Time: Nov 6 09:28:45 >> Log: auid=4294967295 uid=0 gid=0 ses=4294967295 pid=4441 comm="tower" >> exe="/snap/telecom-tower/x1/bin/tower" sig=31 arch=40000028 14(mknod) >> compat=0 ip=0x76e3aaf6 code=0x0 >> Syscall: mknod >> >> Note that if I scp the binary file and run on ubuntu core as root, >> then the program runs fine. (I don't install the snap, I just run the >> binary from the home directory.) >> >> Does someone have an idea about what I can do to make my snap run? >> >> Thank you very much in advance for your support. > > Hey Jacques, > > I think we did discuss about GPIO support in confined mode, but there is > no interface for this today AFAIK (CCing Jamie who can confirm and maybe > give a path/ETA forward).
There is a GPIO interface. The downside of it is that you need a slot defined on the gadget snap. As long as this isn't done for the official gadget snaps for Pi 2/3 you can only build your own. See https://github.com/snapcore/snapd/blob/master/interfaces/builtin/gpio.go for details about the interface itself. regards, Simon -- Snapcraft mailing list Snapcraft@lists.snapcraft.io Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/snapcraft
