/*!
\file    serialib.h
\brief   Serial library to communicate throught serial port, or any device emulating a serial port.
\author  Philippe Lucidarme (University of Angers) <serialib@googlegroups.com>
\version 1.2
\date    28 avril 2011
This Serial library is used to communicate through serial port.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

This is a licence-free software, it can be used by anyone who try to build a better world.
*/


#ifndef SERIALIB_H
#define SERIALIB_H


// Used for TimeOut operations
#include <sys/time.h>
// Include for windows
#if defined (_WIN32) || defined( _WIN64)
    // Accessing to the serial port under Windows
    #include <windows.h>
#endif

// Include for Linux
#ifdef __linux__
    #include <stdlib.h>
    #include <sys/types.h>
    #include <sys/shm.h>
    #include <termios.h>
    #include <string.h>
    #include <iostream>
    // File control definitions
    #include <fcntl.h>
    #include <unistd.h>
    #include <sys/ioctl.h>
#endif



/*!  \class serialib
     \brief     This class can manage a serial port. The class allows basic operations (opening the connection, reading, writing data and closing the connection).
     \example   Example1.cpp
   */


class serialib
{
public:
    // Constructor of the class
    serialib    ();

    // Destructor
    ~serialib   ();



    //_________________________________________
    // ::: Configuration and initialization :::


    // Open a device
    char    Open        (const char *Device,const unsigned int Bauds);

    // Close the current device
    void    Close();



    //___________________________________________
    // ::: Read/Write operation on characters :::


    // Write a char
    char    WriteChar   (char);

    // Read a char (with timeout)
    char    ReadChar    (char *pByte,const unsigned int TimeOut_ms=0);



    //________________________________________
    // ::: Read/Write operation on strings :::


    // Write a string
    char    WriteString (const char *String);
    // Read a string (with timeout)
    int     ReadString  (   char *String,
                            char FinalChar,
                            unsigned int MaxNbBytes,
                            const unsigned int TimeOut_ms=0);



    // _____________________________________
    // ::: Read/Write operation on bytes :::


    // Write an array of bytes
    char    Write       (const void *Buffer, const unsigned int NbBytes);

    // Read an array of byte (with timeout)
    int     Read        (void *Buffer,unsigned int MaxNbBytes,const unsigned int TimeOut_ms=0);


    // _________________________
    // ::: Special operation :::


    // Empty the received buffer
    void    FlushReceiver();

    // Return the number of bytes in the received buffer
    int     Peek();

private:
    // Read a string (no timeout)
    int     ReadStringNoTimeOut  (char *String,char FinalChar,unsigned int MaxNbBytes);


#if defined (_WIN32) || defined( _WIN64)
    HANDLE          hSerial;
    COMMTIMEOUTS    timeouts;
#endif
#ifdef __linux__
    int             fd;
#endif

};



/*!  \class     TimeOut
     \brief     This class can manage a timer which is used as a timeout.
   */
// Class TimeOut
class TimeOut
{
public:

    // Constructor
    TimeOut();

    // Init the timer
    void                InitTimer();

    // Return the elapsed time since initialization
    unsigned long int   ElapsedTime_ms();

private:    
    struct timeval      PreviousTime;
};



/*!
  \mainpage serialib class

  \brief
       \htmlonly
       <TABLE>
       <TR><TD>
            <a href="../serialibv1.2.zip" title="Download the serialib class">
                <TABLE>
                <TR><TD><IMG SRC="download.png" BORDER=0 WIDTH=100> </TD></TR>
                <TR><TD><P ALIGN="center">[Download]</P> </TD></TR>
                </TABLE>
            </A>
            </TD>
            <TD>
                <script type="text/javascript"><!--google_ad_client = "ca-pub-0665655683291467";
                google_ad_slot = "0230365165";
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                <script type="text/javascript"
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                </script>
            </TD>
        </TR>
        </TABLE>

        \endhtmlonly

    The class serialib offers simple access to the serial port devices for windows and linux. It can be used for any serial device (Built-in serial port, USB to RS232 converter, arduino board or any hardware using or emulating a serial port)
    \image html serialib.png
    The class can be used under Windows and Linux.
    The class allows basic operations like :
    - opening and closing connection
    - reading data (characters, array of bytes or strings)
    - writing data (characters, array of bytes or strings)
    - non-blocking functions (based on timeout).


  \author   Philippe Lucidarme (University of Angers) <serialib@googlegroups.com>
  \date     1th may 2011 (Last update: 25th september 2012)
  \version  1.2

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

This is a licence-free software, it can be used by anyone who try to build a better world.
*/




#endif // SERIALIB_H