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WinCE 6 USB camera does not work if plugged in at startup RRS feed

  • Question

  • Hello,

    the USB camera doesn't work if plugged in at startup. Other devices (like USB mouse) are working if plugged in at startup. The camera also works if plugged on and I start a debug image with debug messages on serial port. The camera also works if I unplug the device and plug in again at release image.

    We are working with PXA270 and MainstoneIII OHCI driver.

    Has someone an idea?

    Best regards,

    Andreas

    Thursday, October 11, 2012 7:52 AM

Answers

  • I found a solution. The main problem was, that the USB 5V was turned on before the driver is loaded.

    Best regards,

    Andreas

    • Marked as answer by Andreas_1981 Thursday, October 11, 2012 1:32 PM
    Thursday, October 11, 2012 1:32 PM

All replies

  • It's looking like Timing related issue. Check the USB initialization code and try to put appropriate delay where ever needed.

    Best Regards,

    Rakesh.

    Thursday, October 11, 2012 10:39 AM
  • I found a solution. The main problem was, that the USB 5V was turned on before the driver is loaded.

    Best regards,

    Andreas

    • Marked as answer by Andreas_1981 Thursday, October 11, 2012 1:32 PM
    Thursday, October 11, 2012 1:32 PM