You can add a serial port slot to a gadget snap.yaml like this: ttyS4: interface: serial-port path: /dev/ttyS4
This only applies to static serial port nodes. If you have one provided by an USB device you have to user a slightly different slot definition which refers the USB product/vendor id of your USB device: my-usb-serial: interface: serial-port usb-product: 0x1111 usb-vendor: 0x2222 path: /dev/my-usb-serial-port With the path attribute you can select a static path for the serial port node which your snap then gets access to once you connected the plug and the slot. The path needs to start with /dev/ and afterwards you're free to select a free node name. Internally the interface implementation will link the right /dev/ttyUSB* node to the specified path. Please note that you can define such a slot only on a gadget snap! So if you don't have your own gadget snap today, you need to create one for your device in order to get access to the serial port. I hope that helps. regards, Simon On Wed, Jan 11, 2017 at 7:37 PM, Oliver Grawert <o...@ubuntu.com> wrote: > hi, > Am Mittwoch, den 11.01.2017, 17:59 +0000 schrieb Mritunjai Singh: > > Hi All, > > > > Kindly refer to: https://github.com/snapcore/snapd/issues/2557 > > > > We are trying to get a head start on Core Snappy working with our RF > > Mesh network card. It connects over serial and needs to be available > > at boot. We first tried this using snap approach but due to missing > > hotplugging serial-interface in current(latest) version of snapcraft, > > serial i/o requests are being denied even if the snap has the > > permission to use serial port. > > > > We have been suggested the gadget snap approach in order to expose > > /dev/ttyS0 to the serial port interface for tunnccd snap to access > > it. It would be very helpful if someone can point me to the working > > example of a gadget snap with access to serial interface or any end > > to end gadget snap example and its build steps. > > note that all our gadgets offer a console on serial by default, if you > drive some external device via serial you might want to drop this > console tty option. > > all our official gadgets are under https://github.com/snapcore/ .. > namely the pi2-gadget, pi3-gadget, pc-gadget and dragonboard-gadget > sub-trees if you want to take a look ... > > ciao > oli > -- > Snapcraft mailing list > Snapcraft@lists.snapcraft.io > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/snapcraft > >
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