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EK-TM4C123GXL: TIVA TM4C123G USB not recognized by TI GUI

Part Number: EK-TM4C123GXL

Hello ,

I am trying to Implement the USB_Bulk example,well i imported the project followed the steps from  TI guide.

and when i emoved my cable from debug port and connected it to USB Side.No drivers were detected.Even my device manager is not listing any of the drivers for USB_BULK.

I wonder when i try to use airmouse example,the usb port  works fine with  that and windows detects it and installs the drivers for same.

I read from few posts that ,such kind of problem is due to the VID & PID values in  usb_bulk_structs.c  file.?

So i tried to figure out the issue and changed those values but it shows no change..

and the TI GUI for usb bulk example gives error always as

-----------------------------------------------error---------------------------------

unable to initialize the stellaris bulk device

error code is 1167(the device is not connected)

-----------------------------------------------------------------------------------

If anyone has worked around it,kindly do the needful here.

 

Thank you

 

Regard

 

Rather

  • Hi Rather,
    Sorry, your post was missed since last week. There is a switch (SW3) on the launchpad. Did you switch the SW3 so that the board is powered by the USB device port?
  • Hello Charles,

    Sorry for late reply,

    Yes i put the board in device mode by using that switch.Board is getting power abut the USB bulk example doesn't work,My Pc doesnt recognize the device.

    & i have tried AIR mouse example too ,which is also a USB based example,That time board works fine as a USB device.

    Regards

    Rather Sajad
  • Hi Sajad,
    Can you check in Windows device manager and see what happens when you plug and unplug the LaunchPad device running the bulk example into the PC? Did you see the enumeration or the Windows refreshing the screen? When you do the same using mouse example?
    When you run the Windows side bulk example demo utility what does it show? I was able to run the command line utility and if I type something in, it returns the opposite CASE. For example, if I type abc it will return ABC.
  • Hello Charles,

    Yes i checked it during the USB Bulk example,My PC device manager detects nothing as if nothing has been connected.My command utility shows an error"Unable to initialize the device".

    & during Air mouse Application PC detects a driver under input devices.

  • Hi Sajad,
    Can you power cycle or restart your windows PC? Did you try the existing program binary that comes with the TivaWare or you somehow rebuild/modify the example? One thing to also try is to connect the USB device port to your windows PC while stilling powering the port via the debug USB port.

    I will be back in office tomorrow and can look more into the problem.
  • Hello Charles,

    Thank you for the all help.

    Today tried to do it once again and looked much deeper in the issue,it seems  the issue was the driver for bulk devices.It works fine now and the command application example also works great.

    Regards 

    Rather Sajad