From a35bf3b7e8a42461041eaefbb48dfbdc295e0251 Mon Sep 17 00:00:00 2001 From: Anonymous Date: Wed, 14 Jul 2021 17:25:05 +0530 Subject: [PATCH] Created geda_sch2sym (markdown) --- geda_sch2sym.md | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 geda_sch2sym.md diff --git a/geda_sch2sym.md b/geda_sch2sym.md new file mode 100644 index 0000000..a7b8802 --- /dev/null +++ b/geda_sch2sym.md @@ -0,0 +1,43 @@ +## Procedure + +1. Draw the graphical part of the symbol (lines, boxes, delineation of + internal connections) +2. Add pins (keyboard shortcut: ap) and fill in the attributes + 'pinlabel','pinnumber','pinseq','pintype'. Normally, the first two + attributes are kept visible while the other two are kept invisible. + Use the pin name mentioned in the device datasheet as your + 'pinlabel'. 'pinnumber' and 'pinseq' have the same value unless you + are using [slotting](slotting "wikilink"). 'pintype' should be one + of the ten values mentioned in the ![ gEDA Master Attribute + Document](geda-attributes-Hvezda.pdf + " gEDA Master Attribute Document") and should be in lower case. +3. Add at least the following symbol attributes to the symbol: + 'refdes', 'device', 'value', 'description', 'author', 'numslots' and + 'footprint' +4. Make all attributes invisible (keyboard shortcut 'en') and translate + the symbol to the origin using the keyboard shortcut 'et'. This + ensures that the symbol appears at the right place when invoked. +5. Run [gsymcheck](gsymcheck "wikilink") on the symbol file to ensure + it is alright + +## Hierarchical Symbols + +These are symbols which represent underlying schematics (or netlists). +There are some additional requirements in this case: + +1. *Source=* attribute pointing to source schematic +2. *model-name=* attribute pointing to model name or subcircuit name + with parameters +3. *file=* pointing to relative path of the sub-circuit prototype + (SPICE subckt file) + +## Also see: + +1. Some guidelines on the gEDA library page: on + +2. See the ![ gEDA Master Attribute + Document](geda-attributes-Hvezda.pdf + " gEDA Master Attribute Document") for the meanings of the + attributes. +3. Automated tool for converting schematic to symbol: + [geda\_sch2sym](geda_sch2sym "wikilink") \ No newline at end of file