Hey! I've actually had the EXACT same problems and it was driving me nuts! I'm running a 16GB Wifi Galaxy tab with the 3.1 touchwiz update.
I can connect a USB mouse and keyboard and hub all just fine, they work great. However, when I try to enumerate the devices, I get nothing. To compound the confusion, I was trying to build custom kernel drivers for an unsupported device (FTDI chips) and it was driving me crazy because I could install the module and verify it was running, but I had the same problem - the device is not supported message. I thought it was me! Specifically, I was trying to do this: http://android.serverbox.ch/?p=285 Then I tried this: http://android.serverbox.ch/?p=370 and couldn't get it to indicate that ANY devices were enumerated, even when it was just a USB mouse that was working! So then I tried BOTH of google's example apps, modifying the code to print all enumerated devices. Nothing. It printed the count value for the number of devices enumerated. Zero. Again, this was with a functioning device plugged in (In this case a keyboard). Annoyingly, I couldn't even TRY the ADB example the way its intended, because my phone is apparently a "high power device" and the tablet straight up tells you it refuses to mount it. Grrr. But aside from the high power device issue, which is annoying but seems to be by design, I am starting to feel like there is some problem with the USB implementation on the Galaxy Tab 10.1, and I am going to go out and buy an Acer Iconia A500 since people have reported success with that, and I am doing this for work. I will let you know how that goes. -Taylor On Aug 5, 6:58 am, wl <[email protected]> wrote: > 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
