ASI output IP - Easy to use?

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So there is none ready to use? I still have to code some parts of it?

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There is an Altera IP core;

http://www.altera.com/products/ip/iup/additional_functions_iup/m-alt-asi.html

Go and use it. That page indicates there is an open-core evaluation version, which means it is not free.

If you want free, then you have to decide what to do next.

Cheers,

Dave