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gEDA
GNU Electronic Design Automation
------------------------------------------------------------------------------
README for misc utilities
(This software is ALPHA)
IMPORTANT
Please read the file NEWS for details on specifics for this release
- Installation
See the toplevel INSTALL for more instructions on general install
instructions
- Utilities
gmk_sym
Written by: Jerry O'Keefe, jerryok@pacbell.net
This is a simple utility to convert comma separated
descriptions into rectangular gschem symbols. It should
be useful for easily creating memory, processors or
connector style parts. All pin positions are in normal pin
spacing (300). Pin styles supported are line, dot-line,
and clock line. Pins can be placed on all sides of the
symbol's box. For example to place a dot-line style pin of
name INPUT at the normal pin 1 position of a IC would be:
INPUT,1,dot,L,1
The size of the symbol's box is also in pin spacings. So
a symbol with 6 inputs and 6 outputs would typically
require a size of: 3 for width and 7 for height.
See the included 7474.txt and 8031.txt as example files.
This utility is not strong on error checking and slotting
is not supported.
gmk_sym typical use:
./gmk_sym 7474.txt >7474-3.sym
gmk_sym is installed when make install is run.
smash_megafile
Written by: Mike Jarabek, mjarabek@playground.net
smash_megafile is a C program that will take a viewlogic
megafile and extract the contents into a directory of the same
name, with one file representing each element in the library.
This program should compile without any problems for anyone.
This program cannot create megafiles, it can just extract all
the contents. (Useful for say, extracting all the symbols from
a library...) Be aware that megafiles from PC versions of
ViewDraw use PC end of line terminations, it may be necessary
to use a program like dos2unix to convert the resulting text
files... before doing useful things with them.
smash_megafile typical use:
./smash_megafile megafile
where megafile is the name of a viewlogic megafile whithout
any extensions. The file megafile.lib and megafile.tbl must
exist in the same directory
smash_megafile is installed when make install is run.
convert_sym.awk
convert_sym.c
Written by: Mike Jarabek, mjarabek@playground.net
convert_sym.awk is an AWK script which takes ViewLogic Viewdraw
schematic or symbol and outputs a gschem compatible file. This
awk script is now OBSOLETE and will be replaced completely by
the C version. It's just included in the dist as a reference for
other converter authors.
convert_sym.c does the same thing as the AWK script but is
written in C and has some bugs fixed.
This utility should be considered a work in progress.
Be warned, the program has quite a few limitations:
1) gEDA does not have a 'bus' type net, so for the
moment, busses are output as simple nets.
2) I don't think that I am adding net names correctly
to the output schematic, gnetlist does not seem to
pick up the right names.
3) Viewlogic text uses a text origin system that has
9 anchor points for the text. Text in geda only has
one anchor point, so the text anchoring position is
approximated by shifting text around. This may result
in wierd looking text positions.
4) Some text spacing may be lost due to the way that I
extract the text from the viewlogic records
5) Rotated and mirrored text will not appear correctly
in the geda schematic, to make this work properly
will require some interesting math, but I don't think
there is much benefit to this
6) Arcs in viewlogic are stored implicitly as a record
where the arc passes through three points,
the conversion from this format to geda's
center/radius/start/stop notation is not exact,
so some arcs may not render well.
7) Bubbles are drawn on pins that are negated. I believe
the code is correct, but have not tried all the
end cases.
8) Rotated and mirrored components may not show up correctly.
convert_sym.awk typical use:
cat viewlogic_file | awk -f convert_sym.awk > geda_file
convert_sym.awk is NOT installed when make install is run.
convert_sym (the C version) typical use:
./convert_sym viewlogic_filename > geda_file
convert_sym is installed when make install is run.
- License
gEDA (includes gschem/gnetlist/geda/gsymcheck/gschcheck/gpcb/utils
and all associated files (such as component symbols)) is placed
under the GNU Public License (GPL) version 2.0. See the toplevel
COPYING file for more information.
Programs and associated files are:
Copyright 1998,1999 by Ales V. Hvezda and the respective original
authors (which are listed on the respective files)
mk_sym is Copyright 1999 by Jerry O'Keefe
smash_megafile is Copyright 1999 by Mike Jarabek
- Contact information
Jerry O'Keefe (for mk_sym)
E-mail: jerryok@pacbell.net
Mike Jarabek (for smash_megafile, convert_sym.awk, convert_sym.c)
E-mail: mjarabek@playground.net
Ales V. Hvezda
E-mail: ahvezda@geda.seul.org
Web: http://www.geda.seul.org/
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