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Date: Thu, 9 Jul 2015 22:23:31 +0000
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Subject: Re: [geda-user] Back annotation
From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On 7/9/15, Evan Foss <evanfoss AT gmail DOT com> wrote:
> On 7/9/15, DJ Delorie <dj AT delorie DOT com> wrote:
>>
>>> #3 is certainly growing on me. I find myself dealing with multiple
>>> layout contractors, and one of them wants footprint names like
>>> "BGA484C100P22X22_2300X2300X260". I don't think those belong in the
>>> schematics, and the others are happy with "BGA484". So, it's a
>>> flow-dependent mapping.
>>
>> That idea was a side-effect of my "component database" blue-sky.  We
>> really
>> want *three* main tools:
>>
>> * schematic capture (gschem)
>> * mapping to a backend (netlister + component_db + project_ruleset)
>> * backend (pcb/sim/etc)
>>
>> The mapping would map symbolic information (pins A,B,Y, value, etc) to
>> physical information (package-specific pinouts, simulation models,
>> etc) based on whatever relevent local rules apply.  Most of this info
>> is what's back-annotated anyway, but the backend can provide its
>> as-built data to the netlister on the fly, to merge with new schematic
>> info.
>>
>> It's also a solution to the transistor problem, because the
>> information that's moved out of the schematic is the same information
>> that causes the problem in the first place.
>>
>> And by swapping the db/rules you get to target different backends with
>> the same schematics.
>>
>> One of the "backends" could be an annotated as-built schematic set too
>> :-)
>>
>> /me wonders how this will work with heriarchical "symbols" feeding
>> ruleset attributes to subcircuits...
>
> How do you prompt the user for the information in a way that is not
> painfully breaking their flow.
>
> Perhaps if you back-annotate while using subcircuits it should present
> you with two options side by side?

There are a lot of situations like this where I want something that
uses a rendering of the schematic but not the ability to edit it.


-- 
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