ch14.4.htm
来自「Verilog DHL教程」· HTM 代码 · 共 152 行
HTM
152 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML EXPERIMENTAL 970324//EN"><HTML><HEAD><META NAME="GENERATOR" CONTENT="Adobe FrameMaker 5.5/HTML Export Filter"><LINK REL="STYLESHEET" HREF="ch14.css"><TITLE> 14.4 Simulation control system tasks</TITLE></HEAD><BODY BGCOLOR="#ffffff"><DIV><HR><P><A HREF="ch14.htm">Chapter start</A> <A HREF="ch14.3.htm">Previous page</A> <A HREF="ch14.5.htm">Next page</A></P></DIV><H1 CLASS="Section"><A NAME="pgfId=795"> </A>14.4 <A NAME="79333"> </A>Simulation control system tasks</H1><P CLASS="Body"><A NAME="pgfId=1004"> </A>There are two simulation control system tasks</P><OL><P CLASS="NumberedLista"><A NAME="pgfId=1401"> </A>a) <B CLASS="Keyword">$finish</B></P><P CLASS="NumberedListb"><A NAME="pgfId=1574"> </A>b) <B CLASS="Keyword">$stop</B></P></OL><P CLASS="SubSection"><A NAME="pgfId=997"> </A>$<A NAME="97575"> </A><A NAME="marker=250"> </A>finish</P><P CLASS="Body"><A NAME="pgfId=819"> </A>Syntax:</P><PRE CLASS="CodeIndent"><A NAME="pgfId=820"> </A><B CLASS="Keyword">$finish</B><A NAME="marker=254"> </A> [(n)] ;</PRE><P CLASS="Body"><A NAME="pgfId=842"> </A>The <B CLASS="Keyword">$finish</B> system task simply makes the simulator <A NAME="marker=257"> </A>exit and pass control back to the host operating system. If an expression is supplied to this task, then its value determines the <A NAME="marker=258"> </A>diagnostic messages that are printed before the prompt is issued. If no argument is supplied, then a value of 1 is taken as the default.</P><TABLE><CAPTION><P CLASS="TableTitle"><A NAME="pgfId=774"> </A>Table 14-9<A NAME="64521"> </A>: Diagnostic messages for $stop and $finish</P></CAPTION><TR><TH ROWSPAN="1" COLSPAN="1"><P CLASS="CellHeading"><A NAME="pgfId=776"> </A>Parameter Value</P></TH><TH ROWSPAN="1" COLSPAN="1"><P CLASS="CellHeading"><A NAME="pgfId=777"> </A>Diagnostic Message</P></TH></TR><TR><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=778"> </A>0</P></TD><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=779"> </A>prints nothing</P></TD></TR><TR><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=780"> </A>1</P></TD><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=781"> </A>prints simulation time and location</P></TD></TR><TR><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=782"> </A>2</P></TD><TD ROWSPAN="1" COLSPAN="1"><P CLASS="CellBody"><A NAME="pgfId=791"> </A>prints simulation time, location, and statistics about the memory and CPU time used in simulation</P></TD></TR></TABLE><P CLASS="SubSection"><A NAME="pgfId=1299"> </A><A NAME="24159"> </A>$st<A NAME="marker=502"> </A>op</P><P CLASS="Body"><A NAME="pgfId=1301"> </A>Syntax:</P><PRE CLASS="CodeIndent"><A NAME="pgfId=1302"> </A><A NAME="marker=28"> </A><B CLASS="Keyword">$stop</B> [(n)] ;</PRE><P CLASS="Body"><A NAME="pgfId=1304"> </A>The <B CLASS="Keyword">$stop</B> system task causes simulation to be suspended . This task takes an optional expression argument (0, 1, or 2) that determines what type of diagnostic message is printed. The amount of diagnostic messages output increases with the value of the optional argument passed to <B CLASS="Keyword">$stop</B>.</P><HR><P><A HREF="ch14.htm">Chapter start</A> <A HREF="ch14.3.htm">Previous page</A> <A HREF="ch14.5.htm">Next page</A></P></BODY></HTML>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?