Configurable Entity Statement

[rAinStorms]

Hi,
I have an design that for a number of reasons has a top level architecture
that really needs a confurable entity statement to configure the input and
output ports dependant upon product type.

As this is the top level entity I cant very well use generates in the
instantiation of the entity as a component in a higher layer.

I also cannot wrap the top layer easily in a another layer for a number of
reasons.

Any help appreciated.

Cheers,
Chris

 

[Jonathan Bromley]

"rAinStorms" <chris_karma@xtra.co.nz> wrote in message
news:XJxXb.44491$9k7.914467@news.xtra.co.nz...

I have an design that for a number of reasons has a top level architecture
that really needs a confurable entity statement to configure the input and
output ports dependant upon product type.

As this is the top level entity I cant very well use generates in the
instantiation of the entity as a component in a higher layer.

I also cannot wrap the top layer easily in a another layer for a number of
reasons.

Any help appreciated.

I'm really confused. If you need different top levels for different
products, what on earth is the objection to a wrapper?

Anyhow, if you *really must* have a configurable BUILD, which I
think is what you are asking for, then the only way I know of
is to create a package defining your top-level port types, and
re-create that package for each different build. Completely
horrible, but it would work.

Please go back to thinking about a wrapper, one wrapper
per version, so that you can use the proper VHDL machinery
of generics and configurations to do what you need.
The added effort is tiny; it is beyond my imagination to
see what might prevent you from doing it.
--
Jonathan Bromley, Consultant

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