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Re: New part file format document.


On 16 December 2010 02:31, Wayne Stambaugh <stambaughw@xxxxxxxxxxx> wrote:
> On 12/15/2010 9:19 PM, Karl Schmidt wrote:
>> On 12/15/2010 07:30 PM, Brian Sidebotham wrote:
>>> When placing components such as passives (mainly R's and C's) you come
>>> across the common problem that you draw the symbol either horizontally
>>> or vertically. When you place the component it could be in one of four
>>> orientations, but generally it's either 0deg rot (horizontal) or 90deg
>>> rot (vertical).
>> This is called Schematic symbol alternatives - usually you only need 2
>> versions (bridge circuits need a 45 makes 3 versions) - most CAD systems
>> have this - and its nice.  I added this to my wiki's wish list.
> This would this not be a feature in the schematic capture program?  An
> excellent idea but I don't see it as a requirement of the part file or
> the part file editor.
> Wayne

It does need a way of telling the schematic capture how to choose a
look for a component. However, I think the functionality is allowed
for in the current spec already. The different versions can be
alternatives, then it is down to the GUI design to make these
alternatives easy to select on a per-component instance basis which
I'm sure is possible, and if I remember rightly desired by Jean-Pierre
for large logic designs too for selecting deMorgan.

So I think this is already covered, I hadn't thought about using
alternatives for this in the part spec. This also covers different
pinouts for processors that are available in different packages.

The only thing not covered for me then would be one schematic pin to
many footprint pins support. I can't see a nice way of doing that yet.
It's only a nice-to-have anyway, and that's only my opinion which
generally seems to differ from most others! ;)

Thanks again for all the efforts, I'm really seeing Dick's vision of
editing the source of the part in the editor as it's so easy to read
and follow. Well Done All!

Best Regards,


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