Video stream not visible while streaming through EZ-USB™ CX3
Do the following to debug:
Note: If UART cannot be used to get the debug prints, use the firmware attached with this KBA. With this firmware, the device enumerates as a composite device with CDC + UVC interface. Use serial terminal like Tera Term or any other application and then start the UVC host application.
|Criteria to check in the debug prints||Actions if criteria are not satisfied|
|MIPI errors are 0||
|The frame size received by EZ-USB™ CX3 is the same as the frame size reported in the USB descriptor for the particular resolution.||
Note: The maximum CSI clock frequency should be used per Q13 of this KBA91297.
Note: For streaming RAW video format, see this KBA224387, which provides details on firmware modifications needed for padding/packing of the RAW video data. Note that the image will look green in color due to the mismatch in image formats. This method can be used for firmware development and testing.
|DMA reset events are observed in the debug prints||
Figure 1 Phy time delay value from CX3 MIPI receiver tool
Reduced frames per second observed in the host application
Do the following: