\section{UART}
  \subsection{Generals:}
    On many microcontrolers you can use \textbf{U}niversal \textbf{A}synchronous \textbf{R}eceiver \textbf{T}ransmitter, in order to provide a standart access to this device you have to 
    implement th folowing functions:

  \begin{itemize}
    \item uart\_t \textbf{uartopen}(int);
    \item \textbf{uartclose}(uart\_t);
    \item \textbf{uartsetup}(uart\_t,int,int);
    \item \textbf{uartputc}(uart\_t, char);
    \item char \textbf{uartgetc}(uart\_t);
    \item \textbf{uartputstring}(uart\_t,char*);
    \item \textbf{uartgetstring}(uart\_t,char*);
  \end{itemize}
  
  \subsection{Details}
    \subsubsection{\textbf{Openning uart}}
        uart\_t \textbf{uartopen}(int) \\
        This function has to open N\ieme  \textbf{ uart} device, so it has to perform basical configuration such as powering up the device \dots This finction has also to return the pointer to the devicce handle.
    \subsubsection{\textbf{Closing uart}}
        \textbf{uartclose}(uart\_t)
    \subsubsection{\textbf{Configure uart}}
        \textbf{uartsetup}(uart\_t,int baudrate,int cpuclk)
    \subsubsection{\textbf{Sending a char through uart}}
        \textbf{uartputc}(uart\_t, char)
    \subsubsection{\textbf{Receiving a char from uart}}
        char \textbf{uartgetc}(uart\_t)
    \subsubsection{\textbf{Sending a string through uart}}
        \textbf{uartputstring}(uart\_t,char*)
    \subsubsection{\textbf{Receiving a string from uart}}
        \textbf{uartgetstring}(uart\_t,char*)