Advantech DVP-7421BE, Руководство пользователя

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2.4.16 Multi-Board ID Reorganization
Maximum performance Triplex example
：
The DVP-7421BE could
preview
、
encode and playback simultaneously with four codec
chip.
One system can install four DVP-7421BE capacities; it is notice
below to recognize the board ID of multi-card.
The driver of the video capture device in the DVP-7421B is a
DirectShow source filter. In the DirectShow
，
the device source
filters are enumerated by the System Device Enumerator.
Because enumerate sequence is not by PCI Slot in proper
ordering, there cannot know the video capture filter that is belong
to which capture card owns. We use the below way to mapping
video capture filter and capture card.
In the driver of the video codec chip
，
the instance of the video
codec chip can be got corresponding to the order of the PCI slot.
We use the first codec chip to set the board ID (Refer to the SDK
manual, DVP7421B_SetBoardID function.)
After setting the board ID, the board LED will show the board ID.
Next step, the video capture device filter will read the board ID
(Refer to the SDK manual, DVP7421B_GetBoardID function),so
the video capture device filter is belong to corresponding capture
card.