gEDA-user: Support for heterogeneous symbols?

fricker fricker at pobox.com
Thu Feb 8 09:13:52 EST 2007


Hi All,

I am evaluating gEDA and came across one feature I am extensively  
using today with a commercial EDA tool when dealing with large  
components, like SOC, FPGAs and ASICs: heterogeneous symbols.

I searched the doc, the mailing lists and the Web but could not find  
how I could create and use such symbols with gschem and gnetlist.

As Roger Williams defines it in his post: http://www.geda.seul.org/ 
mailinglist/geda-dev6/msg00003.html

 > Heterogeneous devices are non-identical symbols that represent
 > different parts of the same device for REFDES and layout purposes.
 > They can be tied together by the same 'HETERO=DEVICE1,DEVICE2...'
 > attribute on each device.  Typical examples include:
 >
 >   - large complex logic devices split between multiple symbols
 >     because of space constraints;
 >
 >   - multi-function devices split so that each different functional
 >     block has its own symbol (relays, for instance);

Does gschem support such a way to deal with large devices?
If the answer is yes, then how?
If the answer is no, then how are people dealing with it?

Thanks,
_jP


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