Problems with significantly reduced capture frames.

ArduCAM / ArduCAM_USB_Camera_Shield

This is the repository for ArduCAM USB Camera Shield

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Problems with significantly reduced capture frames. #51

Open youn-seong-rim opened 6 years ago

youn-seong-rim commented 6 years ago

The problem is that the capture frame drops considerably when multiple usb ports are used. Usage environment is win7 64bit, visual c ++, Camera moude of MT9V034, 10 usb port for other purposes. When using the MT9V034 camera module in this environment, the capture frame rate drops significantly. If I remove 10 different usb ports, the frame rate is normal. Is there any way I can get a normal frame rate even if I use several different USBs? I would appreciate your feedback.

ArduCAM commented 6 years ago

As you can see the USB2 only have 480MByte/s bandwidth, so 10 USB port will average the total bandwidth and cause dropping frames. I suggest to use dedicate USB root hub port for the camera, and the other 10 USB device using another root hub port, then they will not be conflict.