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USB generic bulk device problems

Ryan Lush67904
Expert 1140 points

I am trying to get the usb_dev_bulk project (included with StellarisWare at \StellarisWare\boards\ek-lm3s9b92\usb_dev_bulk) to work with the EvalBot (LM3S9B92). The problem is when I attach a USB cable from the USB DEVICE connector on the EvalBot to my computer, nothing shows up. No request for drivers or anything. The thought just occurred to me - perhaps I can't debug over USB and try to communicated over USB but I see an FT2232 right next to the USB debug connector so that isn't even using USB as far as the CPU is concerned. I have some INI files which I know need to be used somewhere but the device should at least show up. I don't even know what to do with the INI files until the device shows up. The OS is Windows 7 and it should be using the winUSB framework/drivers to talk to the board. I also built the Windows command line program in the StellarisWare directory which looks for the device and it can't find it either. Can anyone offer me some suggestions? Has anyone had success with this example?

  • 0
    Prodigy 170 points

    I got the same Problem with my LM3S9D92 Evaluation Board, but I am using Windows XP.

    My first Problem was that the usb_bulk_example.exe needs the winusb.dll ... so I downloaded it from the internet.

    Now usb_bulk_example.exe works, but I allways get an error: UNABLE TO INITIALIZE THE STELLARIS BULK USB DEVICE. ERROR CODE IS 1167 (DEVICE NOT CONNECTED)

    So I tried and tried ... one time I reconnect the Development Board to my PC the PC asked for drivers for an USB BULK DEVICE ... so I installed the driver from Stellaris Ware. But in the Windows Device Manager I still can´t see the Bulk Device, and the usb_bulk_example.exe reports the same error.

     

    So at the moment I don´t know what to do ... please help.

     

    Best Regards, Werner

  • 0 in reply to Werner Nophut
    Prodigy 170 points

    I fixed the problem by my own!

     

    ...in the end it was very simple. I used the "USB-OTG(male) to USB-A(female)" cable which was in the packet with the evaluation board, and connect it per "USB-A(male) to USB-A(male)" cable with my pc. Nothing works ... I thought I got a problem with the device drivers, but that was not the point.

    So I tried some other examples like usb_serial or the qs_adventure and still nothing works ... because there are different drivers for the other examples, I wondered whats wrong ... and then I think about the other parts of the connection.

    Now I use a standard "USB-A(male) to USB-MICRO-B(male)" cable and it works.