128 lines
4.5 KiB
HTML
128 lines
4.5 KiB
HTML
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<HTML>
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<HEAD>
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<STYLE type="text/css">
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H1 {color: black }
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H2 {color: maroon }
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H3 {color: #007090 }
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A.head:link {color: #0060a0 }
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A.head:visited {color: #3040c0 }
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A.head:active {color: white }
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A.head:hover {color: yellow }
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A.red:link {color: red }
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A.red:visited {color: maroon }
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A.red:active {color: yellow }
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</STYLE>
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</HEAD>
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<TITLE>Magic-7.3 Command Reference</TITLE>
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<BODY BACKGROUND=graphics/blpaper.gif>
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<H1> <IMG SRC=graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
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<IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>
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<H2>feedback</H2>
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<HR>
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Query or manipulate feedback entry areas.
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<HR>
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<H3>Usage:</H3>
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<BLOCKQUOTE>
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<B>feedback</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>add</B> <I>text</I> [<I>style</I>] [<I>x1 y1 ...</I>]
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<DD> Create a new feedback area. If positions <I>x1 y1 ...</I>
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are not specified, then the feedback area created
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corresponds to the area of the cursor box.
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The feedback entry will be associated with the text
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<I>text</I>, which will be reported on execution of
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a <B>feedback why</B> query. The feedback area will
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be drawn in style <I>style</I>, which may be one of
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the following:
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<UL>
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<LI><B>dotted</B>
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<LI><B>medium</B>
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<LI><B>outline</B>
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<LI><B>pale</B>
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<LI><B>solid</B>
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</UL>
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From magic version 7.3.110, <I>any</I> style from
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the ".dstyle" file may be specified (e.g., "yellow1").
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If points <I>x1 y1 ...</I> are specified, then they
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represent a polygonal area for the feedback entry.
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This area may be a point, line, or polygon, and may be
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specified in internal units or metric units. If the
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feedback area is a point, line, or degenerate polygon
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(polygon with zero internal area), then the <I>style</I>
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must be an outlined style; otherwise, the style is changed
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to style <B>outline</B> so that the feedback area is
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ensured to be visible.
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<DT> <B>clear</B> [<I>substring</I>]
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<DD> Without the argument <I>substring</I>, clears all feedback info.
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When <I>substring</I> is specified, only feedback entries
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containing the text <I>substring</I> will be removed. For
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example, if "cif see CMF" is followed by "cif see CCC", the
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contact cuts will not be seen due to being overlapped by
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the feedback for metal1. However, if this is followed by
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"feedback clear CMF", the feedback area for metal1 will
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be removed, leaving the contact cuts visible.
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<DT> <B>count</B>
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<DD> Count the number of feedback entries
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<DT> <B>find</B> [<I>nth</I>]
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<DD> Put the cursor box over next (or <I>nth</I>) entry
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<DT> <B>help</B>
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<DD> Print help information
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<DT> <B>save</B> <I>file</I>
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<DD> Save feedback area information into file <I>file</I>
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<DT> <B>why</B>
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<DD> Print text associated with all feedback areas under
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the cursor box.
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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>feedback</B> command queries or manipulates feedback
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areas, which are areas drawn on top of the layout and may
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be used for annotations and markers. Internally, <B>magic</B>
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uses feedback areas to report CIF/GDS layers (<B>cif see</B>
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command), and errors generated by the <B>extract</B> command.
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CIF/GDS feedback is placed on the output (usually centimicron)
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grid, which cannot be done with the <B>feedback add</B>
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command directly from the command-line.
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<P>
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Feedback information and areas are not saved in the layout
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file. <P>
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</BLOCKQUOTE>
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<H3>Implementation Notes:</H3>
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<BLOCKQUOTE>
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<B>feedback</B> is implemented as a built-in <B>magic</B> command.
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</BLOCKQUOTE>
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<H3>Bugs:</H3>
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<BLOCKQUOTE>
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Small feedback areas were previously drawn solid to prevent them
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from disappearing entirely; however, this created bizarre results
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in CIF/GDS feedback when several narrow feedback areas are tiled
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together, so it was removed. This leaves the possibility that
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feedback areas smaller than the spacing between feedback
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crosshatch lines might not be drawn; an inconvenience, but
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not a serious problem.<P>
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There should be a mechanism for removing only the feedback entries
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under the cursor box, or the current feedback entry. <P>
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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> December 4, 2005 at 8:32pm <P>
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</BODY>
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</HTML>
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