At 08:21 AM 12/19/2010, you wrote:
Armin Faltl wrote:
>> In addition, I set the refdes of the subsheet symbol to a
>> single digit. That way, the refdeses stand a chance to be
>> readable in in silk with a three layered hierarchy.
>>
> How about emitting only the "basename" of a refdes on silk
Then, I'd have no way to locate which schematic subsheet a
particular "R1" on the layout would correspond to. Of course,
all refdeses might be guaranteed to be different like starting
at R100 for one sub sheet and at R200 for the second. In that
case, refdes mangling can be switched off whole sale in a local
gnetlistrc:
(hierarchy-uref-mangle "disabled")
Can you be sure this will work with all designs? Your approach would
limit each subsheet to 100 of each type of component before name
collisions happen. I can picture two ways of working around this.
One is to instead append a numeral or other indicator to the
beginning of a refdes, i.e. when on subsheet 3 a part might be
3R15. Of course this could be confused with a part value, i.e.
15R3. But at least it will give a unique name regardless of the size
of the subsheets.
The other is to have a feature in the schematic package to provide a
unique number to each component. The subsheet instances would be
processed in turn resulting in a unique number being assigned to each
component in the design. If I understand correctly how subsheets
work, I can see where you might want to display to the user a given
subsheet only once rather than separately each time the sheet is
referenced. But I may be missing something here.
Does it make sense to let the schematic package reassign ref des in
multiple instances of a subsheet?
Rick
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