On Sat, Aug 07, 2010 at 02:32:33PM +0200, Stefan Salewski wrote: > > These "Maximum Distance between OpAmp and bypass Cap" problem is really > a special but important case. It is more related to two pads/pins than > to nets. >
I agree, but on a high level a net /is/ "a relation between two pads/pins". (Well, a net can have many pads/pins. A subnet would be restricted to two, by definition.) So I don't think we want to introduce a new kind of relationship. It would be confusing and unnecessary. > We can click in gschem on a pair of tow pins to mark this pair > with the condition "Max Distance = ...". Autoplacer can use this > information in PCB program. RatsNest lines in PCB can specially mark > these pin pairs. And after we have routed our board DRC check may verify > if these maximum distances restrictions are fulfilled. > Again, it looks like storing max distance as a net attribute (or subnet attribute) would be a cleaner design than trying to fit an attribute onto "two pads or pins". > The big problem is again how to transfer netclass information from > gschem to PCB (and maybe back). I really have no good idea and my Unix > programming skills are too weak. Saving and loading files is simple, but > not really nice in my opinion... > Well, the modular design of the gEDA suite dictates that we use simple files for storing information and sharing them between programs. That way you can replace any individual program with a better one, in theory at least. Andrew _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
