Dan McMahill wrote: > Steve Meier wrote: > >> 3) Do you need back anotation? >> >> If you answer yes to any of these then geda/pcb isn't there yet and may >> never be. If you would like to discuss your project requirements either >> here or more privately don't hesitate to ask. > > depends a bit on the flow. Using gschem + gnetlist to drive pads layout > seems to work and backannotation does work there. Although for some > reason it looks like the documentation vanished when everything moved to > the wiki :( > > -Dan
correction, I found it. http://geda.seul.org/wiki/geda:fbabgapp There is some limited ability to do this with pcb too. By limited, I mean you can use the Renumber() feature in pcb and then backannotate that to your schematics. You can't, howerver, currently manually renumber, add components to the layout and backannotate to schematic, or do gate/slot/pin swapping, or package changes and backannotate to the schematics. Of course I'm of the belief that if you're doing analog design you don't really need those features. I think the only hard part in more fully implementing a more full featured forward/backward annotation flow is a netlist comparison tool. But the tool needs to be able to match a topology without needing to know the netnames or the refdes's. In other words it needs to be able to tell you that R1 (node1 node2) resistor r=10k C1 (node2 ground) capacitor c=0.1u C2 (node1 ground) capacitor c=0.22u can be the same as R3 (in out) resistor=6.8k C3 (in ground) capacitor c=0.1u C4 (out ground) capacitor c=0.1u if you do R1 -> R3 node in -> node node1 node out -> node node2 value C2 -> 0.1u value R1 -> 6.8k C1 -> C4 C2 -> C3 Once you have that, you can produce a change file which can be reviewed for sanity and then applied in either direction. -Dan _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
