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No COM ports shown in device manager after driver install

Kevin Roke
Prodigy 30 points
Other Parts Discussed in Thread: ENERGIA

Just purchased a TivaC Launch Pad (TM4C123G) for the upcoming edX course.

I am running Windows 7 Home Premium.

I installed the software and drivers but when I connected the board to the USB no indication of any COM ports were shown in the Device Manager.

I followed the get starting guide during which a dialog box did appear with driver installing confirmation but the three debug drivers did not install (as indicated in the text) but the serial driver seemed to.

I have installed Energia and when I access the Tools menu the Serial Port option is grayed out.

What do I need to do to allow the COM ports to become active so I can communicate with the board?

  • 0
    TI__Mastermind 26900 points

    If you installed the drivers as per the documentation, the COM port driver should appear in Device Manager. Could you let me know what Tiva or Stellaris devices you see in Device Manager (other than the missing COM port)? That may give a clue as to what's going on.

  • 0 in reply to Dave Wilson
    Prodigy 30 points

    No Tiva or Stellas devices are shown.

    When I plug in the board to the Device input the unit powers up correctly but no changes occur in the device manager and no devices are indicated in any of the other sections.

    When I plug the unit in via the Debug input an additional USB composite device shows and three unknown debug drivers with yellow question marks appear but no other device info is displayed.

    I have tried this on three computers so far - one Win 7 and the other two Win XP with the same outcome.

    The only time any indication of USB connection notification is on the Debug input.

    I have downloaded the Tiva series driver packages SLAC632.zip I have also tried the Energia driver software EZ430-UART.zip too but no response either - I think both files contain the same drivers?

  • 0 in reply to Kevin Roke
    TI__Mastermind 26900 points

    [EDIT: Corrected driver location information!]

    You shouldn't expect to see anything when you plug in the device USB port and it sounds as if the correct thing is happening when you connect the debug port but that not all the drivers are installed. I've not used Energia so I don't know whether or not that package includes the drivers and, thanks to the wonderful search system on this site, I can't figure out what "SLAC632.zip" is. The package you need, though, is the Stellaris ICDI Driver package, which you can find on this page.

    Download and install that package then connect the board via the debug USB port and go into Device Manager. Right click each of the "unknown devices" in turn and install the driver from stellaris_icdi_drivers you created by unzipping the driver package. After you do this for all the unknown devices, you should find that you end up with the expected COM port, debug interface and DFU (Device Firmware Upgrade) devices in Device Manager.

  • 0 in reply to Dave Wilson
    Guru 117855 points

    @ Dave,

    Once again your effort is detailed, most helpful & appreciated.  Thank you.

    In defense of both you & your web group - your site is huge, rather dynamic, & clearly a "bear" to efficiently organize/maintain.  We sell to several defense giants - search/web issues reported here are not especially unique...  That said - "gentle, suggestive prodding" (aka D.W. "trademark") should be welcome & beneficial.  (one hopes)

    Your 2nd paragraph detailing the, "where, what, how & when" of windows_drivers handling is excellent.  For the benefit of many here (and our small group) - can you confirm that the install of the driver from, "C:\ti\TivaWare_C_Series-2.0.1.11577\windows_drivers" is proper for most of your newer devices - and not confined just to the TM4C123GXL?

    As always - your expertise & effort/willingness to sufficiently detail is greatly appreciated.   Thank you.

  • 0 in reply to cb1_mobile
    TI__Mastermind 26900 points

    Thanks.

    The windows_drivers directory contains drivers for all the USB devices supported by Tiva and LM4F boards. Looking at it more closely, I just realized that it actually doesn't contain the debug interface driver which is shipped separately. For that one, you also need to visit this page and download the ICDI driver package. This includes the virtual COM port support too so, rather than pointing Windows at the windows_drivers directory inside TivaWare, point it at the stellaris_icdi_drivers directory you create after downloading those drivers and you should be OK.

    Sorry for the confusion! I'll update my previous post to contain the correct information now.

  • 0 in reply to Dave Wilson
    Prodigy 30 points

    Thank you Dave.

    I had no problem setting up the drivers and the board is working fine.

    I'm sure this info will be of great help to others.

    Regards'

    Kevin