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From:	"Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date:	Sun, 24 Jul 2016 00:22:45 +0000
Message-ID:	<CAM2RGhQ3abb50gz5JtuzX8QOYf0WU0K9LUb4XhU_AirYDC9eiA@mail.gmail.com>
Subject:	Re: [geda-user] Stay or go?
To:	gEDA users mailing list <geda-user AT delorie DOT com>
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On Sun, Jul 24, 2016 at 12:00 AM, Nicklas Karlsson
(nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]
<geda-user AT delorie DOT com> wrote:
>> > With attribute handling I mean pin mapping, BOM generation and similar which is handled thru attached attributes. I think gschem use non of the attributes itself, just assign and display which work great.
>>
>> Yes but to be fair slotting has it's issues.
>
> Attribute for pin may be changed from layout in pcb or assigned later in workflow. This is a feedback issue and attribute is not interpreted by gschem.
>
> If gschem assign pinnumber which I think slotting mechansim do, it must interpret the attributes and define rules for them. There is a problem because same symbol may be used at different positions for different packages and package may not be known or changed afterwards. I think point to mapping with attribute or embedded would or have solved it. Not all circuits end up on a circuit board and for these package pin numbers may not make any sense and better removed.
>
> This pin mapping selection is also a problem for some circuits available in different packages.

To be fair most of the time when you change the parts symbol for
something like an fpga there is no good way to make the new extra pins
fit in the space that was there.

Have you ever used a suite that supported changing packages which
actually handled it correctly more than 90% of the time? I have used a
few and the 10% when it failed drove me nuts.

-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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