Mail Archives: geda-user/2012/10/24/12:47:22
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On Wed, 24 Oct 2012 11:15:38 +1100
Stephen Ecob <stephen DOT ecob AT sioi DOT com DOT au> wrote:
> Simple, human readable file formats are, however,
> one of the great strengths and advantages of gEDA. I personally
> wouldn't hesitate to show beginners our file formats and how
> easily they can be analysed and manipulated with text processing
> tools - it's a feature of gEDA that I greatly value.
Absolutely. Not only can you edit footprints by hand easily,
once you learn the basic syntax, you can easily write scripts to
generate or process them. For instance, see the attached script I
wrote to scale all Pad[] entities in a footprint. For making
custom solder paste stencil apertures, I generally use this by
copying all Pads in the VIM editor, pasting them, and processing
them through "pcb-shrink-pads --scale=0.85" or something, depending
on size/shape of the pads, then adding the 'nopaste' flag to the
original full-size pads.
Another benefit of a readable text file format is that you can use
version control tools side-by-side diff tools to easily compare
changes made to footprint files.
I rarely look at the .pcb layout files, actually, but I frequently
work on footprint files in a text editor.
Now, I do wish for many other features in pcb to make footprint
editing easier. For instance, having to "explode" footprints into
the component pads/pins to edit them, then "composite" them back
together (losing a lot of information, like pin/pad 'square' flag,
solder mask gap, pad name, etc.) is really a bummer. It would be
a huge improvement if we could open and edit footprint files
directly. Also, being able to add EVERY type of pcb entity to a
footprint, and have custom layers like "keepout", "assembly
drawing outline", "silk screen outline", etc. would be extremely
helpful.
Regards,
Colin
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