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Unable to detect USB device on DM37x with an ICS AOS installed ?!

Omkar Rao
Prodigy 30 points


Hi , 

I  have a board programmed as a USB HID device . I want the ICS to detect this board as a comm port and communicate with it serially . I can see the board detected as an HID device in the kernel messages , but  throws a "claimed by neither input, hiddev nor hidraw" error . I  have tried looking at usb-serial apps  present , but to no success.

I was wondering if anybody has any suggestions/pointers  so as how to go about ? 
I have the pre-built ICS image installed .  Do I need to make any modifications in the kernel ? 

Any help is appreciated !
Thank you  

 

  • 0
    TI__Expert 4390 points

    Hi Omkar,

    Try to see if your device is register as input device

    $ getevent -p

  • 0 in reply to Satish Patel
    Prodigy 30 points

    Thanks for the reply Satish.

    I CANNOT see my board  registered when I do the getevent -p  . When I connect a USB Keyboard , I can see it registered along with other random entries as well.

    Does an HID device show up in the ttys ??   How can I communicate with it ?

    Do I need to program my board as a Virtual Comm Port or something   so that I can communicate serially to it?

    Is there any reference / links that you would advice me to  go through, so that I can better understand these conceptual questions I have ?

    Thanks again !

     

  • 0 in reply to Omkar Rao
    TI__Expert 4390 points

    Hi Omkar,

    1. If you can see the entry for your device then reboot the target ( while HID is connected). Then after reboot you can see the entry using getevent <your device e.g. /dev/input1/ etc..>

    2. Below link give you in depth detail, how event is processed in android.

    http://cjix.info/blog/misc/internal-input-event-handling-in-the-linux-kernel-and-the-android-userspace/

    BR,

    satish

  • 0 in reply to Satish Patel
    Prodigy 30 points

    Thanks for the info Satish .

    Actually I cannot see a path appended to my board , as I can see for the usb keyboard (/dev/input/event3)
    my kernel message snippet for the board when plugged in,

    2866.104125] usb 1-2.2: new full speed USB device using ehci-omap and address 7
    [ 2866.231750] usb 1-2.2: New USB device found, idVendor=1fc9, idProduct=0003
    [ 2866.238922] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    [ 2866.246551] usb 1-2.2: Product: LPC11Uxx USB HID
    [ 2866.251373] usb 1-2.2: Manufacturer: NXP SEMICOND
    [ 2866.256347] usb 1-2.2: SerialNumber: DEMO00000000
    [ 2866.273315] generic-usb 0003:1FC9:0003.0004: claimed by neither input, hiddev nor hidraw

    I will surely go through the link you provided . Does the  "claimed by neither input, hiddev nor hidraw" say/mean anything ?

    Thanks a lot for the guidance !