Am 27.03.2014 10:11, schrieb Wim de Vries: > Thanks Chris and others, > Indeed I need to use an external USB GPS and some other USB sensors. > > All communicate via serial ports. > I gave the dmesg output txt as it is on other linux/MeeGo devices to > show that I am not talking rocket science (simply plug in and use > ttyUSB0 for (qt)serial communication). > Never heard about OTG, and never had to use it for my app. Then read http://en.wikipedia.org/wiki/USB_OTG or use a search engine or stay uninformed and keep wondering why it does not work what you want to achieve. ;-) > Don't know why is there a difference between Sailfisch and MeeGo. > > My questions are now: > > Can I enable power on the USB port? (escape would be a battery powered > USB hub) No, not from an app. Might be possible by compiling you own kernel or kernel modul. > Will Sailfish automatically set a up a /dev/ttyUSBsomething when the > device (like an external GPS) is plugged in? No, not at the moment, because it does not support USB OTG! > > I will rephrase my question about adding the Qtserialport as a more > general question on howto add Qt modules (also in the final package). > > > Thanks. > r > wim > > > > > > > On 03/27/2014 07:06 AM, christopher.l...@thurweb.ch wrote: >> Hi Philippe >> >> From this and other threads going back to the very early days of this >> mailing list it is very clear that Wim wants to connect an external >> GPS unit to his Jolla via cable (usb / serial) for use in the cockpit >> of a glider. >> >> HtH >> >> Chris >> >> >> Zitat von "Philippe De Swert" <philippe.desw...@jolla.com>: >> >>> Hi, >>> >>> As this is getting very confused and we are mixing connecting devices >>> to the Jolla and connecting the Jolla to the pc. >>> >>> So which one is it? >>> >>> On 26/03/14 22:11, Wim de Vries wrote: >>>> Thank you guys. >>>> Indeed devel-su works. >>>> I have attached the devices, but the first problem is that the >>>> connection does not supply power (the devices stay dead). >>> >>> So you connected some device to your Jolla? >>> >>>> As far as I know, a usb connection should always have power, but it >>>> is a >>>> bit beyond my kowledge. Do I need another plug? >>> >>> This is not true. All depends on context, what you plug into what etc... >>> >>> In general if you plug in a device into a USB host (like your average >>> USB port on your pc/laptop) you should be able to expect power from it. >>> >>> In the case of a phone this is usually a USB device, so it expects >>> power. >>> >>> And in the OTG case it gets complicated. Here the device is able to >>> switch between host and device mode. And will supply power if it is >>> playing host. >>> >>>> On other linux/MeeGo systems there was always power... >>>> and dmesg would give: >>>> >>>> [ 31.959468] usb 3-2.1.4: new full-speed USB device number 7 using >>>> xhci_hcd >>>> [ 31.977423] usb 3-2.1.4: New USB device found, idVendor=10c4, >>>> idProduct=ea60 >>>> [ 31.977434] usb 3-2.1.4: New USB device strings: Mfr=1, Product=2, >>>> SerialNumber=3 >>>> [ 31.977440] usb 3-2.1.4: Product: CP2102 USB to UART Bridge >>>> Controller >>>> [ 31.977445] usb 3-2.1.4: Manufacturer: Silicon Labs >>>> [ 31.977450] usb 3-2.1.4: SerialNumber: 0001 >>>> [ 31.992330] usbcore: registered new interface driver usbserial >>>> [ 31.992343] usbcore: registered new interface driver >>>> usbserial_generic >>>> [ 31.992355] USB Serial support registered for generic >>>> [ 31.992361] usbserial: USB Serial Driver core >>>> [ 31.992942] usbcore: registered new interface driver cp210x >>>> [ 31.992955] USB Serial support registered for cp210x >>>> [ 31.992991] cp210x 3-2.1.4:1.0: cp210x converter detected >>>> [ 32.063473] usb 3-2.1.4: reset full-speed USB device number 7 using >>>> xhci_hcd >>>> [ 32.079934] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called >>>> with disabled ep ffff8801debc38c0 >>>> [ 32.079947] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called >>>> with disabled ep ffff8801debc3880 >>>> [ 32.080450] usb 3-2.1.4: cp210x converter now attached to ttyUSB0 >>>> >>>> Use Qserialport on ttyUSB0 and ready you are. >>> >>> This looks like plugging in a serial device into a PC. Do you want >>> your Jolla to expose a serial port? That is definitely possible and >>> easy. >>> >>> Do you want your Jolla to read data from some serial port with a >>> serial to USB adapter then you're getting in a very complicated world. >>> >>> Unless you can explain what you actually want there is little we can >>> do to help. >>> >>> Regards, >>> >>> Philippe >>> >>> >>> _______________________________________________ >>> SailfishOS.org Devel mailing list >>> >> >> >> >> _______________________________________________ >> SailfishOS.org Devel mailing list >> > > _______________________________________________ > SailfishOS.org Devel mailing list >
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