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From: karl AT aspodata DOT se
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Some improvement to gmk_sym
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Comments: In-reply-to Yanjun Yang <yangyj DOT ee AT gmail DOT com>
   message dated "Fri, 16 May 2014 13:54:28 +0800."
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Message-Id: <20140516130935.CAC808020178@turkos.aspodata.se>
Date: Fri, 16 May 2014 15:09:31 +0200 (CEST)
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Yanjun Yan:
> I don't know how many users of gmk_sym are out there, I found it quite simple
> and straight forwards to use.

You know that there are a few symbol generators out there:

 http://www.gedasymbols.org/user/dj_delorie/tools/djboxsym.html
 http://wiki.geda-project.org/geda:tragesym_readme
 http://turkos.aspodata.se/git/openhw/pdftosym/pintosym.pl (my projekt)

Try them and see what you can improve.

> I improved this tool to try to keep the input file minimal, most of
> the fields of pin
> definition can be omited.  I have a 100 pins example at github:
> 
>  https://github.com/setarcos/gmk_sym/blob/master/examples/f020.txt

You have not documented what -c means, from the code it seems to set
ccwise to 1, and that option has a somewhat confusing effect, it seems
to change only the top and right side order.

Instead of requiring users to specify:
/*     4th value: box's hoz size, in pins spacings                       */
/*     5th value: box's ver size, in pins spacings                       */
/*     8th value: Total number of pins on device (including hidden)      */
why not just count the number of pins on each side and calculate the
above values by the program ?

The sym file created contains the attributes pins and class. I cannot 
find them at http://wiki.geda-project.org/geda:master_attributes_list.
What is your inteded use of them ?

Your resulting sym file has a box:
 B 300 300 9300 9000 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1
with a line width of 0. I like a thicker outline to make it differ from 
nets and such. Wouldn't a line width like 40 be nice ?

There seems not much of a consensus of what grid to place pins on. You
are using 300, I'm using 400, and symbols in geda repository are using
a 200, 300 or a 400 grid. Any thoughts ?

In the sym, you have:
 T 4423 4800 3 10 1 0 0 0 1
 C8051F020
Would'n it be nicer to make that an value=C8051F020 attribute ?

Regards,
/Karl Hammar

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