There is a GPIO interface <https://github.com/snapcore/snapd/blob/master/interfaces/builtin/gpio.go> and it was going through some fixes a couple of weeks ago as it would only work when first connected, but not after a reboot.
On Mon, Nov 7, 2016 at 8:53 AM, Didier Roche <didro...@ubuntu.com> 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). > > Meanwhile, you can still install your snap in devmode to bypass security, > and that should do it in your case, mind confirming? > Cheers, > Didier > > -- > Snapcraft mailing list > Snapcraft@lists.snapcraft.io > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/snapcraft > > -- - Loïc
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