\hypertarget{dtr_dtrPres}{}\section{Presentation}\label{dtr_dtrPres}
The {\bfseries Design Technology Rules (D\-T\-R)} format was developped as a part of the Chams Project (\href{http://www-soc.lip6.fr/recherche/cian/chams/}{\tt http\-://www-\/soc.\-lip6.\-fr/recherche/cian/chams/}). It aims at offering a generic description of layout design rules for C\-M\-O\-S technologies.\par
 \hypertarget{dtr_dtrAutrhos}{}\subsection{Author}\label{dtr_dtrAutrhos}
Damien Dupuis\-: damien.\-dupuis(at)lip6(.)fr\hypertarget{dtr_dtrLimits}{}\subsection{Limitations}\label{dtr_dtrLimits}
Only simple rules are supported at the moment. For example the minimum width of a metal layer has only one value, although it should depends on the length of the wire drawned.\hypertarget{dtr_dtrDB}{}\section{Stand alone database structure}\label{dtr_dtrDB}
The database contains four object \-:
\begin{DoxyItemize}
\item \hyperlink{class_d_t_r_1_1_techno}{D\-T\-R\-::\-Techno} contains generic informations such as the name of the technology and the unit used, and the list of all technologic rules.
\item \hyperlink{class_d_t_r_1_1_rule}{D\-T\-R\-::\-Rule} \& \hyperlink{class_d_t_r_1_1_a_rule}{D\-T\-R\-::\-A\-Rule} respectively describe a symmetrical and an asymmetrical rule.
\end{DoxyItemize}

The library also use the \hyperlink{class_d_t_r_1_1_d_t_r_exception}{D\-T\-R\-::\-D\-T\-R\-Exception} class to throw excptions.\hypertarget{dtr_dtrParser}{}\subsection{Using the parser}\label{dtr_dtrParser}
Simply load a technology with static function \hyperlink{class_d_t_r_1_1_techno_acf863c2bdb7f1aacc4422c8155c60d17}{D\-T\-R\-::\-Techno\-::read\-From\-File()} and then get rules (\hyperlink{class_d_t_r_1_1_techno_a4d56a05b47bd6c51e4e18120f49b584b}{D\-T\-R\-::\-Techno\-::get\-Rule()}) or directly values (\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{D\-T\-R\-::\-Techno\-::get\-Value()}).\hypertarget{dtr_dtrDriver}{}\subsection{Using the driver}\label{dtr_dtrDriver}
Using the driver is very simple, user has to create a \hyperlink{class_d_t_r_1_1_techno}{D\-T\-R\-::\-Techno} object and simply add \hyperlink{class_d_t_r_1_1_rule}{D\-T\-R\-::\-Rule} or \hyperlink{class_d_t_r_1_1_a_rule}{D\-T\-R\-::\-A\-Rule} to it. The adding methods return the newly created Rule so user can set the rule type (\hyperlink{class_d_t_r_1_1_rule_a3568407d7a7890c39b8c9acc1e608535}{D\-T\-R\-::\-Rule\-::set\-Type()}) if necessary. Finally use the \hyperlink{class_d_t_r_1_1_techno_a26b05539dd3345963b8708788b82e2cb}{D\-T\-R\-::\-Techno\-::write\-To\-File()} method to dump the database to file.\hypertarget{dtr_dtrExamples}{}\section{Examples}\label{dtr_dtrExamples}
As said is the global presentation, V\-L\-S\-I S\-A\-P\-D project provides C++ libraries and Python modules for each supported format. In this section we present simple code examples to parse and drive a D\-T\-R file using C++ or Python. The D\-T\-R file considered is the same for all examples\-: {\ttfamily example.\-dtr.\-xml} 
\begin{DoxyCodeInclude}
<technology name=\textcolor{stringliteral}{"example"} unit=\textcolor{stringliteral}{"micro"} version=\textcolor{stringliteral}{"rev.A"}>
   <physical\_rules>
     <!-- transistor -->
     <rule  name=\textcolor{stringliteral}{"transistorMinL"}                                         value=\textcolor{stringliteral}{"0.10"}   ref=\textcolor{stringliteral}{"ref1"}/> 
     <rule  name=\textcolor{stringliteral}{"transistorMinW"}                                         value=\textcolor{stringliteral}{"0.20"}   ref=\textcolor{stringliteral}{"ref2"}/>

     <!-- minWidth -->
     <rule  name=\textcolor{stringliteral}{"minWidth"}           layer=\textcolor{stringliteral}{"metal1"}                      value=\textcolor{stringliteral}{"0.15"}   ref=\textcolor{stringliteral}{"ref3"}/>

     <!-- minSpacing -->
     <rule  name=\textcolor{stringliteral}{"minSpacing"}         layer=\textcolor{stringliteral}{"metal1"}                      value=\textcolor{stringliteral}{"0.20"}   ref=\textcolor{stringliteral}{"ref4"}/>
     <rule  name=\textcolor{stringliteral}{"minSpacing"}         layer1=\textcolor{stringliteral}{"active"}   layer2=\textcolor{stringliteral}{"poly"}     value=\textcolor{stringliteral}{"0.10"}   ref=\textcolor{stringliteral}{"ref5"}/>

     <!-- minExtension -->
     <arule name=\textcolor{stringliteral}{"minExtension"}       layer1=\textcolor{stringliteral}{"poly"}     layer2=\textcolor{stringliteral}{"active"}   value=\textcolor{stringliteral}{"0.20"}   ref=\textcolor{stringliteral}{"ref6"}/>

     <!-- minArea -->
     <rule  name=\textcolor{stringliteral}{"minArea"}            type=\textcolor{stringliteral}{"area"}       layer=\textcolor{stringliteral}{"metal1"}    value=\textcolor{stringliteral}{"0.100"}  ref=\textcolor{stringliteral}{"ref7"}/>
  </physical\_rules>
</technology>

\end{DoxyCodeInclude}


All source codes are available in the {\ttfamily examples} directory.\hypertarget{dtr_dtrC}{}\subsection{C++}\label{dtr_dtrC}
\hypertarget{dtr_dtrParseC}{}\subsubsection{Parser}\label{dtr_dtrParseC}
The following code ({\ttfamily parse\-Dtr.\-cpp}) is an example of how to parse a D\-T\-R file using C++ library. 
\begin{DoxyCodeInclude}
\textcolor{preprocessor}{#include <iostream>}
\textcolor{preprocessor}{#include <string>}
\textcolor{keyword}{using namespace }std;

\textcolor{preprocessor}{#include "vlsisapd/dtr/Techno.h"}

\textcolor{keywordtype}{int} main(\textcolor{keywordtype}{int} argc, \textcolor{keywordtype}{char} * argv[]) \{
    \hyperlink{class_d_t_r_1_1_techno}{DTR::Techno}* techno = \hyperlink{class_d_t_r_1_1_techno_acf863c2bdb7f1aacc4422c8155c60d17}{DTR::Techno::readFromFile}(\textcolor{stringliteral}{"./example.dtr.xml"}
      );

    cerr << \textcolor{stringliteral}{"+-----------------------------+"} << endl
         << \textcolor{stringliteral}{"| technology:      "} << techno->\hyperlink{class_d_t_r_1_1_techno_aef436e6e20d1dbf2eb78b089ca9d0794}{getName}()    <<   \textcolor{stringliteral}{"    |"}   << endl
         << \textcolor{stringliteral}{"| units:           "} << techno->\hyperlink{class_d_t_r_1_1_techno_a4a8ae82fc3348771d0b53d9a3b11652d}{getUnit}()    << \textcolor{stringliteral}{"      |"} << endl
         << \textcolor{stringliteral}{"| version:         "} << techno->getVersion() << \textcolor{stringliteral}{"      |"} << endl
         << \textcolor{stringliteral}{"+-----------------------------+"} << endl << endl;

    cerr << \textcolor{stringliteral}{"transistorMinL                = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"transistorMinL"}) << endl
         << \textcolor{stringliteral}{"transistorMinW                = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ad5ef5b8e444ab7a86a2e3bff7762c956}{getValueAsString}(\textcolor{stringliteral}{"transistorMinW"}
      ) << endl
         << \textcolor{stringliteral}{"minWidth of metal1            = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"minWidth"}, \textcolor{stringliteral}{"metal1"}) << endl
         << \textcolor{stringliteral}{"minSpacing of metal1          = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"minWidth"}, \textcolor{stringliteral}{"metal1"}) << endl
         << \textcolor{stringliteral}{"minSpacing of active vs poly  = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"minSpacing"}, \textcolor{stringliteral}{"active"}, \textcolor{stringliteral}{"poly"}) 
      << endl
         << \textcolor{stringliteral}{"minExtension active over poly = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"minExtension"}, \textcolor{stringliteral}{"poly"}, \textcolor{stringliteral}{"active"}
      ) << endl
         << \textcolor{stringliteral}{"minArea of metal1             = "} << techno->\hyperlink{class_d_t_r_1_1_techno_ac08e2e60dd16750551221ca908001057}{getValue}(\textcolor{stringliteral}{"minArea"}, \textcolor{stringliteral}{"metal1"}) << endl;

    \textcolor{keywordflow}{return} 0;
\}

\end{DoxyCodeInclude}
\hypertarget{dtr_dtrDriveC}{}\subsubsection{Driver}\label{dtr_dtrDriveC}
This C++ code ({\ttfamily drive\-Dtr.\-cpp}) generates a out.\-dtr.\-xml file equivalent to the previous example.\-dtr.\-xml. 
\begin{DoxyCodeInclude}
\textcolor{preprocessor}{#include <string>}
\textcolor{keyword}{using namespace }std;

\textcolor{preprocessor}{#include "vlsisapd/dtr/Techno.h"}
\textcolor{preprocessor}{#include "vlsisapd/dtr/Rules.h"}

\textcolor{keywordtype}{int} main(\textcolor{keywordtype}{int} argc, \textcolor{keywordtype}{char} * argv[]) \{
    \hyperlink{class_d_t_r_1_1_techno}{DTR::Techno}* techno = \textcolor{keyword}{new} \hyperlink{class_d_t_r_1_1_techno}{DTR::Techno}(\textcolor{stringliteral}{"MyTech"}, \textcolor{stringliteral}{"micro"}, \textcolor{stringliteral}{"rev.A"});

    techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule} (\textcolor{stringliteral}{"transistorMinL"}, 0.1 , \textcolor{stringliteral}{"ref1"});
    techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule} (\textcolor{stringliteral}{"transistorMinW"}, 0.2 , \textcolor{stringliteral}{"ref2"});
    techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule} (\textcolor{stringliteral}{"minWidth"}      , 0.15, \textcolor{stringliteral}{"ref3"}, \textcolor{stringliteral}{"metal1"});
    techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule} (\textcolor{stringliteral}{"minSpacing"}    , 0.2 , \textcolor{stringliteral}{"ref4"}, \textcolor{stringliteral}{"metal1"});
    techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule} (\textcolor{stringliteral}{"minSpacing"}    , 0.1 , \textcolor{stringliteral}{"ref5"}, \textcolor{stringliteral}{"active"}, \textcolor{stringliteral}{"poly"});
    techno->\hyperlink{class_d_t_r_1_1_techno_a5f5a790974fe7d3b1c6f1b698ef0a818}{addARule}(\textcolor{stringliteral}{"minExtension"}  , 0.2 , \textcolor{stringliteral}{"ref6"}, \textcolor{stringliteral}{"poly"}  , \textcolor{stringliteral}{"active"});
    
    \hyperlink{class_d_t_r_1_1_rule}{DTR::Rule}* rule = techno->\hyperlink{class_d_t_r_1_1_techno_afa2c8412c365c950649b9f81661ecafd}{addRule}(\textcolor{stringliteral}{"minArea"}, 0.1, \textcolor{stringliteral}{"ref7"}, \textcolor{stringliteral}{"metal1"});
    rule->\hyperlink{class_d_t_r_1_1_rule_a3568407d7a7890c39b8c9acc1e608535}{setType}(\textcolor{stringliteral}{"area"});

    techno->\hyperlink{class_d_t_r_1_1_techno_a26b05539dd3345963b8708788b82e2cb}{writeToFile}(\textcolor{stringliteral}{"./out.dtr.xml"});
    
    \textcolor{keywordflow}{return} 0;
\}

\end{DoxyCodeInclude}


\begin{DoxyNote}{Note}
In order to compile these codes, a C\-Make\-Lists.\-txt file is provided. User must set the \$\-V\-L\-S\-I\-S\-A\-P\-D\-\_\-\-T\-O\-P variable before running these commands in the directory containing the C\-Make\-Lists.\-txt file\-: 
\begin{DoxyCode}
%> mkdir build; cd build
%> cmake ..
%> make
\end{DoxyCode}

\end{DoxyNote}
\hypertarget{dtr_dtrPython}{}\subsection{Python}\label{dtr_dtrPython}
\hypertarget{dtr_dtrParsePython}{}\subsubsection{Parser}\label{dtr_dtrParsePython}
The following python script ({\ttfamily parse\-Dtr.\-py}) is an example of how to parse a D\-T\-R file using python module. 
\begin{DoxyCodeInclude}
1 \textcolor{keyword}{from} DTR \textcolor{keyword}{import} *
2 \textcolor{keyword}{from} decimal \textcolor{keyword}{import} Decimal
3 
4 techno = Techno.readFromFile(\textcolor{stringliteral}{"./example.dtr.xml"})
5 
6 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"+-----------------------------+"}
7 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"| technology:      "}+techno.get)   +  \textcolor{stringliteral}{"    |"}
8 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"| units:           "}+techno.getUnit()   +\textcolor{stringliteral}{"      |"}
9 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"| version:         "}+techno.getVersion()+\textcolor{stringliteral}{"      |"}
10 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"+-----------------------------+\(\backslash\)n\(\backslash\)n"}
11 
12 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"transistorMinL                = %s"}%techno.getValue(\textcolor{stringliteral}{"transistorMinL"})
13 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"transistorMinW                = %s"}%Decimal(techno.getValueAsString(\textcolor{stringliteral}{"transistorMinW"}))
14 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"minWidth of metal1            = %s"}%techno.getValue(\textcolor{stringliteral}{"minWidth"}, \textcolor{stringliteral}{"metal1"})
15 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"minSpacing of metal1          = %s"}%techno.getValue(\textcolor{stringliteral}{"minWidth"}, \textcolor{stringliteral}{"metal1"})
16 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"minSpacing of active vs poly  = %s"}%techno.getValue(\textcolor{stringliteral}{"minSpacing"}, \textcolor{stringliteral}{"active"}, \textcolor{stringliteral}{"poly"})
17 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"minExtension active over poly = %s"}%techno.getValue(\textcolor{stringliteral}{"minExtension"}, \textcolor{stringliteral}{"poly"}, \textcolor{stringliteral}{"active"})
18 \textcolor{keywordflow}{print} \textcolor{stringliteral}{"minArea of metal1             = %s"}%techno.getValue(\textcolor{stringliteral}{"minArea"}, \textcolor{stringliteral}{"metal1"})
19 
20 \textcolor{comment}{# an example of why it is important to use Decimal in python:}
21 \textcolor{keywordflow}{print} techno.getValue(\textcolor{stringliteral}{"minArea"}, \textcolor{stringliteral}{"metal1"})*3-0.3 \textcolor{comment}{# returns 5.55111512313e-17}
22 \textcolor{keywordflow}{print} Decimal(techno.getValueAsString(\textcolor{stringliteral}{"minArea"}, \textcolor{stringliteral}{"metal1"}))*3-Decimal(\textcolor{stringliteral}{'0.3'}) \textcolor{comment}{# returns 0.000}
\end{DoxyCodeInclude}
\hypertarget{dtr_dtrDrivePython}{}\subsubsection{Driver}\label{dtr_dtrDrivePython}
This python script ({\ttfamily drive\-Dtr.\-py}) generates a out.\-dtr.\-xml file equivalent to the previous example.\-dtr.\-xml. 
\begin{DoxyCodeInclude}
1 \textcolor{keyword}{from} DTR \textcolor{keyword}{import} *
2 
3 techno = Techno(\textcolor{stringliteral}{"myTech"}, \textcolor{stringliteral}{"micro"}, \textcolor{stringliteral}{"rev.A"})
4 
5 techno.addRule (\textcolor{stringliteral}{"transistorMinL"}, 0.1 , \textcolor{stringliteral}{"ref1"})
6 techno.addRule (\textcolor{stringliteral}{"transistorMinW"}, 0.2 , \textcolor{stringliteral}{"ref2"})
7 techno.addRule (\textcolor{stringliteral}{"minWidth"}      , 0.15, \textcolor{stringliteral}{"ref3"}, \textcolor{stringliteral}{"metal1"})
8 techno.addRule (\textcolor{stringliteral}{"minSpacing"}    , 0.2 , \textcolor{stringliteral}{"ref4"}, \textcolor{stringliteral}{"metal1"})
9 techno.addRule (\textcolor{stringliteral}{"minSpacing"}    , 0.1 , \textcolor{stringliteral}{"ref5"}, \textcolor{stringliteral}{"active"}, \textcolor{stringliteral}{"poly"})
10 techno.addARule(\textcolor{stringliteral}{"minExtension"}  , 0.2 , \textcolor{stringliteral}{"ref6"}, \textcolor{stringliteral}{"poly"}, \textcolor{stringliteral}{"active"})
11 
12 rule = techno.addRule(\textcolor{stringliteral}{"minArea"}, 0.1, \textcolor{stringliteral}{"ref7"}, \textcolor{stringliteral}{"metal1"})
13 rule.setType(\textcolor{stringliteral}{"area"})
14 
15 techno.writeToFile(\textcolor{stringliteral}{"./out.dtr.xml"})
\end{DoxyCodeInclude}


\begin{DoxyNote}{Note}
In order to run these two scripts ({\ttfamily parse\-Dtr.\-py} \& drive\-Dtr.\-py), user must ensure that \$\-P\-Y\-T\-H\-O\-N\-P\-A\-T\-H variable points to the directory containing D\-T\-R.\-so module. 
\end{DoxyNote}