Hi Taylor, Thanks a lot. Based on what have experienced, I guess the Samsung Tab 10.1 with Android-3.1 firmware does not yet support USB Host APIs whereas Acer's Iconia A500 supports the same. Would you please let me know the exact version of the Android firmware on A500 that worked for you. I've come across an Acer Tab A501 with Android-3.0.1 version, however I'm not sure if it supports USB Host API because Google says it is supported only from 3.1 (sdk-version 12 and above) onwards (even though there is an back port of USB Host library for Gingerbread out there).
I would greatly appreciate your comments/suggestions on this. Warm Regards, Anil On Sat, Sep 24, 2011 at 12:31 AM, Taylor Alexander <[email protected]>wrote: > Hi Anil, > > Yes, I did get it working with the Acer. I had replied off list to Will > because my original reply to the list was taking too long to get approved > (it was my first post to this list). > > Here is my first off-list message, where I gave some details: > > On Thu, Sep 22, 2011 at 1:43 AM, Taylor <[email protected]> wrote: > >> Hey, >> I replied to the group, but I'm not seeing the message, so I don't >> know if it failed to post, or if its in limbo since I'm a new user. >> Anyway, I wanted to reply directly to you. I was having the EXACT same >> problem as you. I had a USB device that I had compiled a kernel module >> for. I loaded the module onto the tablet, and lsmod showed it running. >> However, I couldn't get the device to work, and dmesg showed the same >> problem - device not supported, over and over, even though the VID and >> PID matched the source code for the driver. I was going crazy, but I >> thought it was my kernel modules, so I tried a different approach at >> someone's suggestion. >> >> I tried some of google's example code for USB, and when it runs >> getDeviceList() I had it print how many USB devices were connected. It >> always reads zero, even when a functioning USB mouse is connected! >> This was frustrating, so I googled for how to enumerate devices on a >> galaxy tab, and found your post. >> >> After seeing your post, I realized this may be an issue with Samsung. >> I bought an Acer Iconia Tab A500 today, as some users had reported >> success with it - it works! The same code run on the galaxy tab still >> fails. >> >> Both are running 3.1. >> >> So I'm inclined to believe this is an issue with Samsung. Did you ever >> get this working? > > > > I have had continued success with the Acer, and none with the Samsung. > > Will - replying to your off-list message. I just checked again. The Acer > enumerates a webcam and thumbdrive I've tried, but not a mouse or keyboard. > > This is with the following code, which logs values to logcat: > > UsbManager usbman = (UsbManager) getSystemService(USB_SERVICE); > HashMap<String, UsbDevice> devlist = usbman.getDeviceList(); > Iterator<UsbDevice> deviter = devlist.values().iterator(); > PendingIntent pi = PendingIntent.getBroadcast(this, 0, new Intent( > ACTION_USB_PERMISSION), 0); > > while (deviter.hasNext()) { > UsbDevice d = deviter.next(); > l("Found device: " > + String.format("%04X:%04X", d.getVendorId(), > d.getProductId())); } > > where l is a function that logs stuff to the debug window. > > That is a snippet from the source code found here: > http://android.serverbox.ch/?p=370 > > There is that USB missile launcher that the google demo supports. I have > been considering getting one of those to do some more testing with the > Samsung. > > -Taylor > > > On Fri, Sep 23, 2011 at 7:34 AM, Anil Sasidharan <[email protected]>wrote: > >> Hi, >> >> I'm curious to know if you were able to get this fixed using "Acer Iconia >> A500". Are you able to use the android application to enumerate devices >> using USB Host API? >> >> Warm Regards, >> Anil >> >> >> On Thu, Sep 22, 2011 at 1:05 AM, Taylor <[email protected]> wrote: >> >>> 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 >>> >> >> -- >> 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 >> > > -- > 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 > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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