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\section{UART}
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\subsection{Generals:}
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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
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implement th folowing functions:
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\begin{itemize}
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\item uart\_t \textbf{uartopen}(int);
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\item \textbf{uartclose}(uart\_t);
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\item \textbf{uartsetup}(uart\_t,int,int);
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\item \textbf{uartputc}(uart\_t, char);
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\item char \textbf{uartgetc}(uart\_t);
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\item \textbf{uartputstring}(uart\_t,char*);
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\item \textbf{uartgetstring}(uart\_t,char*);
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\end{itemize}
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\subsection{Details}
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\subsubsection{\textbf{Openning uart}}
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uart\_t \textbf{uartopen}(int) \\
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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.
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\subsubsection{\textbf{Closing uart}}
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\textbf{uartclose}(uart\_t)
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\subsubsection{\textbf{Configure uart}}
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\textbf{uartsetup}(uart\_t,int baudrate,int cpuclk)
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\subsubsection{\textbf{Sending a char through uart}}
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\textbf{uartputc}(uart\_t, char)
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\subsubsection{\textbf{Receiving a char from uart}}
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char \textbf{uartgetc}(uart\_t)
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\subsubsection{\textbf{Sending a string through uart}}
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\textbf{uartputstring}(uart\_t,char*)
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\subsubsection{\textbf{Receiving a string from uart}}
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\textbf{uartgetstring}(uart\_t,char*)
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