Help how to use avalon interface

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Anyone can have some document or example?

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The best way to understand the Avalon interface is to use the BFMs to exercise your components or your design. See the tutorial at the top of this page:

https://www.ovro.caltech.edu/~dwh/correlator/cobra_docs.html

and this one

http://www.alterawiki.com/wiki/using_the_usb-blaster_as_an_sopc/qsys_avalon-mm_master_tutorial

Cheers,

Dave