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USB Webcam for Windows CE

Overview​

There is an open source Windows CE driver for Logitech USB webcam available on CodePlex. It only supports the UVC USB webcams. Also, please read the following article: How to use USB Webcam

  • List of the webcams supporting UVC (link)
  • Driver on CodePlex (archived link)
  • Since it supports the UVC class, it will also work with all UVC supported cameras.

We have tested with the following cameras:

  • Logitech C210
  • Logitech C270
  • Logitech C300
  • Logitech C310
  • Logitech C120
  • Logitech C920
  • KBCR_M06VU
  • KBCR_S01MU

Toradex also provides cab installer for the driver. You can find the download link below. Please do not change the default installation path.

Stream Driver Demo(UVC)​

OS:CE5CE6, CE7WEC2013
DemoDownloadDownloadDownload

DirectShow Driver Demo(UVC)​

OS:CE6CE7WEC2013
DemoDownloadDownloadDownload

For Tegra modules, make sure the USB High Speed is activated.

Source Code Download​

Limitations​

  • Frame rate is limited to 7 fps at 320x240 with Colibri VF61 because DMA transfer is not implemented in the USB Host driver and MJPEG decoding process takes more time.
  • Stream UVC demo application supported MJPEG format only. But stream UVC driver can support both YUY2 and MJPEG formats.
  • Directshow UVC demo application supported YUY2 format only. But Directshow UVC driver can support both YUY2 and MJPEG formats.
  • Glitches can be observed in the camera preview while running UVC stream driver application on T20 running under WinCE6. Please disable L2 cache to fix this issue.
    * Please enter into bootloader menu
    * set pex.l2enable=0
    * save pex
    * Reboot
  • Preview will be very slow when using GDI render method and may encounter an exception when using DDRAW render method on DirectShow application on T20 running under WinCE6.
  • UVC DirectShow application preview can be seen only on Unified Display interface and doesn't show on external VGA display on Apalis T30.

Troubleshooting​

If the camera is not working, Please follow the below-mentioned steps

  • Please verify if the following debug print is displaying on the debug console when connecting the USB Camera to the Windows CE device.
    UVC Driver Loading....Done
  • There is PreferredWidth and PreferredHeight registry available in this path [HKEY_LOCAL_MACHINE\Drivers\USB\ClientDrivers\Video_Class]. Comprehensively test for all supported resolutions of that camera(Please connect USB Camera to a PC or Laptop.You can find details about the supported resolutions of that camera using the camera application on the computer).
  • Please change USB High Speed parameter. If enabled, disable it or vice versa and test again with the USB Camera.
  • If the Directshow application is not working on WinCE Modules, please download Binary BSP and Workspace of the respective system and add the following Directshow components and perform CLEAN SYSGEN.
    - SYSGEN_USB<br />
    - SYSGEN_DSHOW_CAPTURE<br />
    - SYSGEN_DSHOW_DMO<br />
    - SYSGEN_DSHOW_VIDREND (SYSGEN_DSHOW_VMR)<br />
    - SYSGEN_DCOM<br />
    After sysgen, use generated binary(NK.nb0 or NK.bin) for evaluating USB camera.


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