David Cary wrote:
> What would be a good user interface for letting me swap gates while I'm looking
> at the PWB design ? Um, that might be difficult -- the netlist information that
> travels from the schematic to the PWB would have to be extended to carry
> information on the various ``parts'' of a component...
>
> Maybe if I used the Crossprobe to jump to that component in the schematic, then
> if there were some quicker way to swap those extensions in the schematic and
> then update the PCB. Maybe somehow recognize that only that component needs to
> be changed, rather than going through the full ``Design | Update PCB''
> process....
>
I once used a CAD system (Daisy) that allowed section and pin swapping
on the PCB, with automatic back-annotation to the schematic.
As I recall (and it was a long time ago), the PCB library had specific
footprints to match each schematic part - instead of a DIP14 footprint
for all the common TTL gates, there was a 7400 footprint, a 7402
footprint, a 7404 footprint, etc...
On each of the footprints, there were little boxes representing the
individual gates in the part - you could drag these boxes around to
shuffle the gates. There was also a pin swap command to exchange pins.
I don't recall creating any new multi-part components on that system, so
don't know what was involved.
--
Peter Bennett
TRIUMF
4004 Wesbrook Mall, Vancouver, BC, Canada
GPS and NMEA info and programs:
http://vancouver-webpages.com/peter/index.html
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