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Date:	Sun, 16 Nov 2014 13:40:40 -0500
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Subject:	Re: [geda-help] Pinlabel Name Syntax
From:	vattan <vatan DOT uml AT gmail DOT com>
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I am very curious on this as well, the docs lack a concise section w/
rules etc so I always assume the worse, nothing fancier than letters
and underscores for me.  also the worst part of the "docs" spread all
over the web, some are 6 years old and don't clearly state the fact,
so thier info is woefully out of date!  I am following this issue as I
have never tried to use a subciruit but I am curious.  Currently I
just do multi-page dwgs and have a folder of good templates and
consitent net naming

On 11/16/14, Mike Bushroe <mbushroe AT gmail DOT com> wrote:
> First off I would like the thank DJ for continuing to put up with headaches
> or running a list like this and helping us non-experts get better.
>
> My main problem is that I usually use gschem, sch2pcb, and pcb once a year
> and keep forgetting half of what I learned and must keep starting over
> again from scratch, especially if there has been a major new release!
> However this time I have been working on the *same* circuit for over a year
> now, and I am still so far away from completion that I am going to start
> all over again from a blank screen and not do any cut and pastes to try and
> finally rid my inputs from the near infinite number of errors. But in the
> process of spending much of the last month or two trying to puzzle out the
> errors and the documentation and tutorials, and I think I have a few things
> narrowed down to fairly specific questions. It may only be that my
> Google-fu over that last few months of looking for 'gEDA', 'hierarchical'
> and 'tutorial' have lead me to the wrong pages and someone can easily point
> to me to which line on what webpage already answeredmwy question. Others
> might warrant being added to future docs. I will split the questions into
> one per thread to make discussion easier. I didn't read the list rules, but
> they probably tell me to do it that way anway!
>
>   First problem is trying to go from an oversized top level schematic page
> to 3 essentially identical sub-schematics. I have seen in my reading where
> it is possible to use a single sub-schematic to make multiple sub-sections
> in the upper schematic, but I have had too much trouble even getting one
> schematic+symbol per instance. The first problem that it has taken me a
> month of running sch2pcb and trying to read the error log to make a guess
> at and that is the label names.
>
>   On document seemed to implying that you should make private netnames such
> as 'sub1:6' on the symbol pins and the input and output symbols on the
> sub-schematic. Another that the 'pinlabel' of the pin on the symbol show
> match the 'refdes' of the input or output symbol on the sub-schematic. But
> none of the them talked about the limits on what the 'labels' could be.
>
>   I start with "-120V Negative Supply Rail", "5V Analog off Negative Supply
> Rail", "Analog 2.V", etc. When I looked at the sch2pcb error log it talked
> about not finding device v pin n in netlist, pin number begins with letter,
> probably bad file format. It took me quite a while to connect the truncated
> names in the error log with the long label names. I now know that you can
> not have blank spaces in the label names. I *think* that periods are ok. I
> am not as sure yet about plus and minus signs, leading numbers, etc.
>
>   So my question is, where do I find the documentation on what the syntax
> is for a valid pinlabel, refdes, device name, pin type, etc. Which
> attributes are required to be 'machine readable'? I know that footprints
> are file names ( with '.fp' being optional), but are there additional
> limits besides what the local OS imposes? I also saw in the sch2pcb error
> log that names were shortened. Is there a set character length to
> pinlables? Device names? Footprint file names?
>
> If there are limits can we get them added to the FAQ? And maybe update some
> of the tutorials that Google keeps pointing me to?
>
> Thanks in advance for the help. As I rebuild the circuit from scratch I am
> going to switch to conservative names just in case.
>
> Mike
> --
> "Creativity is intelligence having fun." — Albert Einstein
>

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