Is it possible to "gluelessly" connect several Altera IPs via Avalon-ST interface?

Honored Contributor

13 years ago

No, it is not.

SGDMA streaming input/output does not know anything about Avalon-ST Video (VIP suite) protocol.

Read this:

See page 34:

"The MegaCore functions in the Video and Image Processing Suite use the Avalon-ST

Video protocol. The Avalon-ST Video protocol is a packet-oriented way to send video

and control data over Avalon-ST connections. Using the Avalon-ST Video protocol

allows the construction of image processing data paths which automatically configure

to changes in the format of the video being processed. This minimizes the external

control logic required to configure a video system."

The Avalon-ST video protocol is a subset of the Avalon-ST protocol.

There are various kinds of packets that are defined by the VIP protocol

that you must handle appropriately.

The SGDMA block knows nothing about how to parse these.

That is why you need an Avalon-ST to Avalon-ST Video converter block

if you want to connect anything from the VIP suite to the SGDMA.

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