Hi, I'm trying to interface to a USB device from my googleIO galaxy tab 10.1. I've been through the documentation on developer.android.com and stack overflow and I can't find anything on this. Here's the problem:
I connect the USB device: I've set up device filters as per the docs, and nothing happens. If I look in logcat when I connect the device, nothing happens. If getDeviceList() says there are 0 devices connected. But if I connect to my galaxy tab 10.1 using "adb shell" then run dmesg, I discover the device is being detected after all: <6>[ 1685.332067] usb 1-1: new low speed USB device using tegra-ehci and address 45 <3>[ 1685.370073] usb 1-1: device v1267 p0000 is not supported <6>[ 1685.392656] host_notify: ndev name=tegra-ehci.0: from state=5 -> to state=5 <3>[ 1685.392726] hub 1-0:1.0: unable to enumerate USB device on port 1 <6>[ 1685.551797] usb 1-1: new low speed USB device using tegra-ehci and address 46 <3>[ 1685.881732] usb 1-1: device v1267 p0000 is not supported <6>[ 1685.903018] host_notify: ndev name=tegra-ehci.0: from state=5 -> to state=5 <3>[ 1685.903089] hub 1-0:1.0: unable to enumerate USB device on port 1 Not only is it being detected, but it seems to be repeatedly: - detecing the device - reading the vid and pid - declaring that they are not supported - giving up on enumerating the device and then starting all over again, about 5 times a second. I tried this with a different USB device (different VID/PID), and saw the same pattern. My questions are: - Could this be because I've managed to cock up setting up the intent filters, or is there some lower level problem stopping the device even getting that far? - What constraints are there on which usb devices are supported on android (e.g. are there limits to which protocols are supported? Or which VIDs/PIDs are supported? Or some other constraints?) - Is there any detailed documentation on USB on android (besides the hardware.usb. api reference)? - Has anyone else had this problem? Have they found a solution? Any help would be much appreciated W -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
