167 lines
4.4 KiB
HTML
167 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!--Converted with LaTeX2HTML 2012 (1.2)
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<HTML>
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<HEAD>
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<TITLE>Register</TITLE>
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<META NAME="description" CONTENT="Register">
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<META NAME="keywords" CONTENT="stratus">
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<META NAME="resource-type" CONTENT="document">
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<META NAME="distribution" CONTENT="global">
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<BODY >
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<DIV CLASS="navigation">
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
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<tr><td class="navigation" align="left" width="33%"><B>Previous</B></td>
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<td class="navigation" align="center" width="34%"><B>Up</B></td>
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<td class="navigation" align="right" width="33%"><B>Next</B></td>
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</tr><tr>
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<td class="navigation" align="left" width="33%"><A HREF="node38.html">Shifter</A></td>
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<td class="navigation" align="center" width="34%"><A HREF="node35.html">Instanciation facilities</A></td>
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<td class="navigation" align="right" width="33%"><A HREF="node40.html">Constants</A></td>
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</tr></table>
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<hr>
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<br>
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</DIV>
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<!--End of Navigation Panel-->
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<!--Table of Child-Links-->
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
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<UL CLASS="ChildLinks">
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<LI><A NAME="tex2html921"
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HREF="node39.html#SECTION00074100000000000000">Name</A>
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<LI><A NAME="tex2html922"
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HREF="node39.html#SECTION00074200000000000000">Synopsys</A>
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<LI><A NAME="tex2html923"
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HREF="node39.html#SECTION00074300000000000000">Description</A>
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<LI><A NAME="tex2html924"
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HREF="node39.html#SECTION00074400000000000000">Example</A>
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<LI><A NAME="tex2html925"
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HREF="node39.html#SECTION00074500000000000000">Errors</A>
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<LI><A NAME="tex2html926"
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HREF="node39.html#SECTION00074600000000000000">See Also</A>
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</UL>
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<!--End of Table of Child-Links-->
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<HR>
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<H2><A NAME="SECTION00074000000000000000"></A>
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<A NAME="secreg"></A>
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<BR>
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Register
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</H2>
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<H3><A NAME="SECTION00074100000000000000">
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Name</A>
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</H3>
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<P>
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Reg - Easy way to instantiate a register
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<P>
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<H3><A NAME="SECTION00074200000000000000">
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Synopsys</A>
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</H3>
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<P>
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<PRE>
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netOut <= netCk.Reg ( netIn )
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</PRE>
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<P>
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<H3><A NAME="SECTION00074300000000000000">
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Description</A>
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</H3>
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<P>
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This method is a method of net. The net which this method is applied to is the clock of the register. The net given as parameter is the input net. The method returns a net : the output net.
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<BR>
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Note that it is possible to change the generator instanciated with the <code>SetReg</code> method.
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<P>
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<H3><A NAME="SECTION00074400000000000000">
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Example</A>
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</H3>
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<P>
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<PRE>
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class essai ( Model ) :
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def Interface ( self ) :
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self.A = SignalIn ( "a", 4 )
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self.S = SignalOut ( "s", 4 )
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self.Ck = CkIn ( "ck" )
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self.Vdd = VddIn ( "vdd" )
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self.Vss = VssIn ( "vss" )
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def Netlist ( self ) :
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self.S <= self.Ck.Reg ( self.A )
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</PRE>
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<P>
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<H3><A NAME="SECTION00074500000000000000">
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Errors</A>
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</H3>
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<P>
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Some errors may occur :
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<UL>
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<LI><code>[Stratus ERROR] Reg : The input net does not have a positive arity.</code>
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<BR>
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The input net must have a positive arity.
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</LI>
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<LI><code>[Stratus ERROR] Reg : The clock does not have a positive arity.</code>
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<BR>
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The clock must have a positive arity.
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</LI>
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</UL>
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<P>
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<H3><A NAME="SECTION00074600000000000000">
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See Also</A>
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</H3>
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<P>
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<A HREF="node3.html#secintroduction"><SPAN CLASS="textit">Introduction</SPAN></A>
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<A HREF="node6.html#secnetlist"><SPAN CLASS="textit">Netlist</SPAN></A>
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<A HREF="node37.html#secmux"><SPAN CLASS="textit">Instanciation of a multiplexor</SPAN></A>
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<A HREF="node40.html#secconstant"><SPAN CLASS="textit">Instanciation of constants</SPAN></A>
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<A HREF="node41.html#secbool"><SPAN CLASS="textit">Boolean operations</SPAN></A>
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<A HREF="node42.html#secarithmetic"><SPAN CLASS="textit">Arithmetical operations</SPAN></A>
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<A HREF="node43.html#seccomp"><SPAN CLASS="textit">Comparison operations</SPAN></A>
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<P>
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<BR> <HR>
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<ADDRESS>
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Sophie B<small>ELLOEIL</small><br>20051116.1
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</ADDRESS>
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</HTML>
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