Re: gEDA-user: Ideas for fixing slotting, methodology discussion, NOT implementation details!

[Bill Gatliff <bgat@xxxxxxxxxxxxxxx>]

Dave N6NZ wrote:
> Ideally, I'd like to be able to use the same symbol for a through-hole 
> 20 pin part or the 24 pin SMD part and back-annotate the correct pin 
> numbers onto the schematic when the part is assigned. (I do that now 
> with two symbols that have identical pin out so that cut/paste sort of 
> gets me by, minus losing some attributes).  Also, I'd like to do slot 
> and pin swapping during PCB layout and back-annotate the "as fabbed" pin 
> numbers back onto the schematic.
>   

I'll go you one better.

I want to draw discrete resistor symbols in my schematic diagram, and
then during component selection satisfy their requirements from the
circuits provided by a resistor network.  I also want to draw discrete
LED symbols in my schematic, and fabricate using dual- or triple-LED
packages.  Ditto for capacitors, transistors, etc.

My thinking is that alongside the .sch file will be one or more
additional files that collectively record the mapping between symbols,
circuits, components and packages.  When gschem sees that file, it has
the information it needs to show actual pin numbers and will optionally
do so.  To achieve that, I bet we end up building some kind of in-memory
database that we don't have today.


b.g.

-- 
Bill Gatliff
bgat@xxxxxxxxxxxxxxx



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