<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title></title> <link rel="stylesheet" media="screen" type="text/css" href="./style.css" /> <link rel="stylesheet" media="screen" type="text/css" href="./design.css" /> <link rel="stylesheet" media="print" type="text/css" href="./print.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body> <div class="table sectionedit639"><table class="inline"> <tr class="row0"> <td class="col0 leftalign"> « <a href="geda-gschem_ug-autonumbering.html" class="wikilink1" title="geda-gschem_ug-autonumbering.html">Autonumbering</a> </td><td class="col1 centeralign"> <strong><a href="geda-gschem_ug.html" class="wikilink1" title="geda-gschem_ug.html">gEDA gschem User Guide</a></strong> </td><td class="col2 rightalign"> <a href="geda-gschem_ug-printing.html" class="wikilink1" title="geda-gschem_ug-printing.html">Printing</a> » </td> </tr> </table></div> <!-- EDIT639 TABLE [1-95] --> <h2 class="sectionedit640"><a name="hierarchy" id="hierarchy">Hierarchy</a></h2> <div class="level2"> <p> When a design has several repeating subcircuits, it can sometimes be useful to draw a schematic for the subcircuit, and then include that subcircuit multiple times in the design. This creates a <em>hierarchy</em> of circuits. </p> <p> Subcircuit schematics are searched for in a <em>source library</em>, and use the “in-1” and “out-1” symbols to indicate which nets to make available as connections for the schematics that include them. Each subcircuit has a symbol, which uses ”<code>source=</code>” <a href="geda-gschem_ug-attributes.html" class="wikilink1" title="geda-gschem_ug-attributes.html">attributes</a> to specify the subcircuit's schematic pages. </p> <p> <p><div class="notetip">See <a href="geda-gschem_ug-config.html" class="wikilink1" title="geda-gschem_ug-config.html">Configuring gschem</a> for details of how to control where gschem looks for subcircuit schematics. </div></p> </p> <p> To add a subcircuit to a schematic, simply place the symbol representing it as a <a href="geda-gschem_ug-components.html" class="wikilink1" title="geda-gschem_ug-components.html">component</a> in the schematic as usual. Subcircuits can in turn contain other subcircuits! </p> <p> To view the underlying schematic for a subcircuit component, <a href="geda-gschem_ug-selecting.html" class="wikilink1" title="geda-gschem_ug-selecting.html">select</a> it and use <strong>Hierarchy→Down Schematic</strong>. Once finished editing the subcircuit's schematic, use <strong>Hierarchy→Up</strong> to return to the original schematic. </p> </div> <!-- EDIT640 SECTION "Hierarchy" [97-] --></body> </html>
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