185 lines
6.2 KiB
HTML
185 lines
6.2 KiB
HTML
<HTML>
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</STYLE>
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</HEAD>
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<TITLE>Magic-8.3 Command Reference</TITLE>
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<BODY BACKGROUND=graphics/blpaper.gif>
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<H1> <IMG SRC=graphics/magic_title8_3.png ALT="Magic VLSI Layout Tool Version 8.3">
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<IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>
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<H2>iroute</H2>
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<HR>
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Do interactive point-to-point routing from the pointer cursor to the
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cursor box
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<HR>
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<H3>Usage:</H3>
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<BLOCKQUOTE>
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<B>iroute</B> <I>option</I> <BR><BR>
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<BLOCKQUOTE>
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where <I>option</I> may be one of the following:
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<DL>
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<DT><B>contacts</B> [<I>type</I>] [<I>parameter</I>] [<I>value</I>...]
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<DD> Set route-contact parameters. <I>parameter</I> may be one of
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the following keywords:
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<DL>
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<DT> <B>active</B>
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<DD>
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<DT> <B>width</B>
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<DD>
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<DT> <B>cost</B>
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<DD>
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</DL>
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<DT> <B>help</B> [<I>option_name</I>]
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<DD> Summarize iroute subcommands
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<DT> <B>layers</B> [<I>type</I>] [<I>parameter</I>] [<I>value</I>...]
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<DD> Set route-layer parameters. <I>parameter</I> may be one of
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the following keywords:
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<DL>
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<DT> <B>active</B>
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<DD>
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<DT> <B>width</B>
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<DD>
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<DT> <B>hCost</B>
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<DD>
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<DT> <B>vCost</B>
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<DD>
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<DT> <B>jogCost</B>
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<DD>
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<DT> <B>hintCost</B>
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<DD>
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</DL>
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<DT> <B>route</B> <I>node_name</I>...
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<DD> Connect point to named node(s)
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<DT> <B>route</B> <I>option</I>...
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<DT> Connect points as specified in the options. <I>option</I> my
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be one of the following:
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<DL>
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<DT> <B>-dbox</B>
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<DD> Route to the area of the cursor box.
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<DT> <B>-dlabel</B> <I>node_name</I>
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<DD> Route to the destination network named <I>node_name</I>.
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The name may be hierarchical, specifying a labeled node
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in a nested list of subcell instances.
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<DT> <B>-dlayers</B> <I>layer_list</I>
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<DD> Force the route to end on of one the layers in the
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comma-separated list.
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<DT> <B>-drect</B> <I>llx lly urx ury</I>
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<DD> Force the route to end within the designated rectangular
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area.
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<DT> <B>-dselection</B>
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<DD> Force the route to end on the area of selected paint.
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<DT> <B>-scursor</B>
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<DD> Start the route at the cursor position.
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<DT> <B>-slabel</B> <I>node_name</I>
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<DD> Route from the start network named <I>node_name</I>.
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The name may be hierarchical, specifying a labeled node
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in a nested list of subcell instances.
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<DT> <B>-slayers</B> <I>layer_list</I>
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<DD> Force the route to start on one of the layers in the
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comma-separated list.
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<DT> <B>-spoint</B> <I>px py</I>
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<DD> Start the route at the indicated point.
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<DT> <B>-timeout</B> <I>value</I>
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<DD> If the maze router is unable to find a valid
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route, it may wander off into an indefinitely
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long search. The search can be interrupted by
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typing a control-C into the calling terminal,
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but one can also specify a timed break using
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the timeout option, where <I>value</I> is in
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seconds. Typically, 4 or 5 seconds is a useful
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value.
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</DL>
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By far, the most useful and most common invocation is
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"<B>iroute route -slabel</B> <I>sname</I> <B>-dlabel</B>
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<I>dname</I>" to route between two named pins.
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<DD> Write out all irouter parameters. These are written out
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as command calls so they can be read back with the Tcl
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<B>source</B> command.
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<DT> <B>search</B> <B>rate</B>|<B>width</B>
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<DD> Set parameters controlling the internal search for routes
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<DT> <B>spacings</B> <I>type</I>
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<DD> Set minimum spacing between route-type and arbitrary type
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<DT> <B>verbosity</B> <I>level</I>
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<DD> Control the amount of messages printed
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<DT> <B>version</B>
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<DD> Identify irouter version
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<DT> <B>wizard</B> <I>parameter</I>
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<DD> Set miscellaneous parameters. <I>parameter</I> may be one of
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the following keywords:
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<DL>
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<DT> <B>bloom</B>
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<DD>
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<DT> <B>boundsIncrement</B>
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<DD>
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<DT> <B>estimate</B>
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<DD>
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<DT> <B>expandDests</B>
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<DD>
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<DT> <B>penalty</B>
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<DD>
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<DT> <B>penetration</B>
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<DD>
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<DT> <B>window</B>
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<DD>
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</DL>
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</DL>
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</BLOCKQUOTE>
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</BLOCKQUOTE>
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<H3>Summary:</H3>
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<BLOCKQUOTE>
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The <B>iroute</B> command invokes Magic's maze router algorithm.
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This is a point-to-point, over-the-cell algorithm based on costs
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specified in the technology file's "<B>mzrouter</B>" section,
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style "<B>iroute</B>". It is not a channel router, and will
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select the best path to connect the chosen start and destination
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nodes, using whatever layers are specified as active in the
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technology file, switching layers and adding contacts as
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necessary, and avoiding obstacles. The quality of the route is
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highly dependent upon both the existing layout and the cost
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specification. <P>
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Special layer types "<B>fence</B>", "<B>rotate</B>", and "<B>magnet</B>"
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are built-in types available in all technologies. Painting the
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"<B>fence</B>" layer creates a boundary inside of which Magic will
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not route. Under a block of "<B>rotate</B>" layer paint, Magic will
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reverse the vertical and horizontal costs of all layers. If the
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technology file specifies unbalanced horizontal and vertical costs,
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for example to tend to force horizontal routes in metal2 and vertical
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routes in metal3, then areas painted with "rotate" will tend to get
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horizontal routes in metal3 and vertical routes in metal2.
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</BLOCKQUOTE>
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<H3>Implementation Notes:</H3>
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<BLOCKQUOTE>
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<B>iroute</B> is implemented as a built-in command in <B>magic</B>.
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</BLOCKQUOTE>
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<H3>See Also:</H3>
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<BLOCKQUOTE>
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<A HREF=route.html><B>route</B></A> <BR>
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<A HREF=garoute.html><B>garoute</B></A> <BR>
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</BLOCKQUOTE>
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<P><IMG SRC=graphics/line1.gif><P>
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<TABLE BORDER=0>
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<TR>
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<TD> <A HREF=commands.html>Return to command index</A>
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</TR>
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</TABLE>
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<P><I>Last updated:</I> March 7, 2020 at 1:06pm <P>
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</BODY>
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</HTML>
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