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/*!

\class Posix_QextSerialPort

\version 1.0.0

\author Stefan Sander

A cross-platform serial port class.

This class encapsulates the POSIX portion of QextSerialPort.  The user will be notified of errors

and possible portability conflicts at run-time by default - this behavior can be turned off by

defining _TTY_NOWARN_ (to turn off all warnings) or _TTY_NOWARN_PORT_ (to turn off portability

warnings) in the project.  Note that _TTY_NOWARN_ will also turn off portability warnings.

*/

#include <stdio.h>

#include "posix_qextserialport.h"

/*!

\fn Posix_QextSerialPort::Posix_QextSerialPort()

Default constructor.  Note that the name of the device used by a QextSerialPort constructed with

this constructor will be determined by #defined constants, or lack thereof - the default behavior

is the same as _TTY_LINUX_.  Possible naming conventions and their associated constants are:

\verbatim

Constant         Used By         Naming Convention

----------       -------------   ------------------------

_TTY_WIN_        Windows         COM1, COM2

_TTY_IRIX_       SGI/IRIX        /dev/ttyf1, /dev/ttyf2

_TTY_HPUX_       HP-UX           /dev/tty1p0, /dev/tty2p0

_TTY_SUN_        SunOS/Solaris   /dev/ttya, /dev/ttyb

_TTY_DIGITAL_    Digital UNIX    /dev/tty01, /dev/tty02

_TTY_FREEBSD_    FreeBSD         /dev/ttyd0, /dev/ttyd1

_TTY_LINUX_      Linux           /dev/ttyS0, /dev/ttyS1

<none>           Linux           /dev/ttyS0, /dev/ttyS1

\endverbatim

This constructor assigns the device name to the name of the first port on the specified system.

See the other constructors if you need to open a different port.

*/

Posix_QextSerialPort::Posix_QextSerialPort()

: QextSerialBase()

{

    Posix_File=new QFile();

}

/*!

\fn Posix_QextSerialPort::Posix_QextSerialPort(const Posix_QextSerialPort&)

Copy constructor.

*/

Posix_QextSerialPort::Posix_QextSerialPort(const Posix_QextSerialPort& s)

 : QextSerialBase(s.port)

{

        setOpenMode(s.openMode());

    port = s.port;

    Settings.BaudRate=s.Settings.BaudRate;

    Settings.DataBits=s.Settings.DataBits;

    Settings.Parity=s.Settings.Parity;

    Settings.StopBits=s.Settings.StopBits;

    Settings.FlowControl=s.Settings.FlowControl;

    lastErr=s.lastErr;

    Posix_File=new QFile();

    Posix_File=s.Posix_File;

    memcpy(&Posix_Timeout, &s.Posix_Timeout, sizeof(struct timeval));

    memcpy(&Posix_Copy_Timeout, &s.Posix_Copy_Timeout, sizeof(struct timeval));

    memcpy(&Posix_CommConfig, &s.Posix_CommConfig, sizeof(struct termios));

}

/*!

\fn Posix_QextSerialPort::Posix_QextSerialPort(const QString & name)

Constructs a serial port attached to the port specified by name.

name is the name of the device, which is windowsystem-specific,

e.g."COM1" or "/dev/ttyS0".

*/

Posix_QextSerialPort::Posix_QextSerialPort(const QString & name)

 : QextSerialBase(name)

{

    Posix_File=new QFile();

}

/*!

\fn Posix_QextSerialPort::Posix_QextSerialPort(const PortSettings& settings)

Constructs a port with default name and specified settings.

*/

Posix_QextSerialPort::Posix_QextSerialPort(const PortSettings& settings)

 : QextSerialBase()

{

    setBaudRate(settings.BaudRate);

    setDataBits(settings.DataBits);

    setParity(settings.Parity);

    setStopBits(settings.StopBits);

    setFlowControl(settings.FlowControl);

    Posix_File=new QFile();

    setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);

}

/*!

\fn Posix_QextSerialPort::Posix_QextSerialPort(const QString & name, const PortSettings& settings)

Constructs a port with specified name and settings.

*/

Posix_QextSerialPort::Posix_QextSerialPort(const QString & name, const PortSettings& settings)

 : QextSerialBase(name)

{

    setBaudRate(settings.BaudRate);

    setDataBits(settings.DataBits);

    setParity(settings.Parity);

    setStopBits(settings.StopBits);

    setFlowControl(settings.FlowControl);

    Posix_File=new QFile();

    setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);

}

/*!

\fn Posix_QextSerialPort& Posix_QextSerialPort::operator=(const Posix_QextSerialPort& s)

Override the = operator.

*/

Posix_QextSerialPort& Posix_QextSerialPort::operator=(const Posix_QextSerialPort& s)

{

        setOpenMode(s.openMode());

    port = s.port;

    Settings.BaudRate=s.Settings.BaudRate;

    Settings.DataBits=s.Settings.DataBits;

    Settings.Parity=s.Settings.Parity;

    Settings.StopBits=s.Settings.StopBits;

    Settings.FlowControl=s.Settings.FlowControl;

    lastErr=s.lastErr;

    Posix_File=s.Posix_File;

    memcpy(&Posix_Timeout, &(s.Posix_Timeout), sizeof(struct timeval));

    memcpy(&Posix_Copy_Timeout, &(s.Posix_Copy_Timeout), sizeof(struct timeval));

    memcpy(&Posix_CommConfig, &(s.Posix_CommConfig), sizeof(struct termios));

    return *this;

}

/*!

\fn Posix_QextSerialPort::~Posix_QextSerialPort()

Standard destructor.

*/

Posix_QextSerialPort::~Posix_QextSerialPort()

{

    if (isOpen()) {

        close();

    }

    Posix_File->close();

    delete Posix_File;

}

/*!

\fn void Posix_QextSerialPort::setBaudRate(BaudRateType baudRate)

Sets the baud rate of the serial port.  Note that not all rates are applicable on

all platforms.  The following table shows translations of the various baud rate

constants on Windows(including NT/2000) and POSIX platforms.  Speeds marked with an *

are speeds that are usable on both Windows and POSIX.

\note

BAUD76800 may not be supported on all POSIX systems.  SGI/IRIX systems do not support

BAUD1800.

\verbatim

  RATE          Windows Speed   POSIX Speed

  -----------   -------------   -----------

   BAUD50                 110          50

   BAUD75                 110          75

  *BAUD110                110         110

   BAUD134                110         134.5

   BAUD150                110         150

   BAUD200                110         200

  *BAUD300                300         300

  *BAUD600                600         600

  *BAUD1200              1200        1200

   BAUD1800              1200        1800

  *BAUD2400              2400        2400

  *BAUD4800              4800        4800

  *BAUD9600              9600        9600

   BAUD14400            14400        9600

  *BAUD19200            19200       19200

  *BAUD38400            38400       38400

   BAUD56000            56000       38400

  *BAUD57600            57600       57600

   BAUD76800            57600       76800

  *BAUD115200          115200      115200

   BAUD128000          128000      115200

   BAUD256000          256000      115200

\endverbatim

*/

void Posix_QextSerialPort::setBaudRate(BaudRateType baudRate)

{

    LOCK_MUTEX();

    if (Settings.BaudRate!=baudRate) {

        switch (baudRate) {

            case BAUD14400:

                Settings.BaudRate=BAUD9600;

                break;

            case BAUD56000:

                Settings.BaudRate=BAUD38400;

                break;

            case BAUD76800:

#ifndef B76800

                Settings.BaudRate=BAUD57600;

#else

                Settings.BaudRate=baudRate;

#endif

                break;

            case BAUD128000:

            case BAUD256000:

                Settings.BaudRate=BAUD115200;

                break;

            default:

                Settings.BaudRate=baudRate;

                break;

        }

    }

    if (isOpen()) {

        switch (baudRate) {

            /*50 baud*/

            case BAUD50:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows does not support 50 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B50;

#else

                cfsetispeed(&Posix_CommConfig, B50);

                cfsetospeed(&Posix_CommConfig, B50);

#endif

                break;

            /*75 baud*/

            case BAUD75:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows does not support 75 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B75;

#else

                cfsetispeed(&Posix_CommConfig, B75);

                cfsetospeed(&Posix_CommConfig, B75);

#endif

                break;

            /*110 baud*/

            case BAUD110:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B110;

#else

                cfsetispeed(&Posix_CommConfig, B110);

                cfsetospeed(&Posix_CommConfig, B110);

#endif

                break;

            /*134.5 baud*/

            case BAUD134:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows does not support 134.5 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B134;

#else

                cfsetispeed(&Posix_CommConfig, B134);

                cfsetospeed(&Posix_CommConfig, B134);

#endif

                break;

            /*150 baud*/

            case BAUD150:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows does not support 150 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B150;

#else

                cfsetispeed(&Posix_CommConfig, B150);

                cfsetospeed(&Posix_CommConfig, B150);

#endif

                break;

            /*200 baud*/

            case BAUD200:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows does not support 200 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B200;

#else

                cfsetispeed(&Posix_CommConfig, B200);

                cfsetospeed(&Posix_CommConfig, B200);

#endif

                break;

            /*300 baud*/

            case BAUD300:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B300;

#else

                cfsetispeed(&Posix_CommConfig, B300);

                cfsetospeed(&Posix_CommConfig, B300);

#endif

                break;

            /*600 baud*/

            case BAUD600:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B600;

#else

                cfsetispeed(&Posix_CommConfig, B600);

                cfsetospeed(&Posix_CommConfig, B600);

#endif

                break;

            /*1200 baud*/

            case BAUD1200:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B1200;

#else

                cfsetispeed(&Posix_CommConfig, B1200);

                cfsetospeed(&Posix_CommConfig, B1200);

#endif

                break;

            /*1800 baud*/

            case BAUD1800:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows and IRIX do not support 1800 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B1800;

#else

                cfsetispeed(&Posix_CommConfig, B1800);

                cfsetospeed(&Posix_CommConfig, B1800);

#endif

                break;

            /*2400 baud*/

            case BAUD2400:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B2400;

#else

                cfsetispeed(&Posix_CommConfig, B2400);

                cfsetospeed(&Posix_CommConfig, B2400);

#endif

                break;

            /*4800 baud*/

            case BAUD4800:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B4800;

#else

                cfsetispeed(&Posix_CommConfig, B4800);

                cfsetospeed(&Posix_CommConfig, B4800);

#endif

                break;

            /*9600 baud*/

            case BAUD9600:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B9600;

#else

                cfsetispeed(&Posix_CommConfig, B9600);

                cfsetospeed(&Posix_CommConfig, B9600);

#endif

                break;

            /*14400 baud*/

            case BAUD14400:

                TTY_WARNING("Posix_QextSerialPort: POSIX does not support 14400 baud operation.  Switching to 9600 baud.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B9600;

#else

                cfsetispeed(&Posix_CommConfig, B9600);

                cfsetospeed(&Posix_CommConfig, B9600);

#endif

                break;

            /*19200 baud*/

            case BAUD19200:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B19200;

#else

                cfsetispeed(&Posix_CommConfig, B19200);

                cfsetospeed(&Posix_CommConfig, B19200);

#endif

                break;

            /*38400 baud*/

            case BAUD38400:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B38400;

#else

                cfsetispeed(&Posix_CommConfig, B38400);

                cfsetospeed(&Posix_CommConfig, B38400);

#endif

                break;

            /*56000 baud*/

            case BAUD56000:

                TTY_WARNING("Posix_QextSerialPort: POSIX does not support 56000 baud operation.  Switching to 38400 baud.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B38400;

#else

                cfsetispeed(&Posix_CommConfig, B38400);

                cfsetospeed(&Posix_CommConfig, B38400);

#endif

                break;

            /*57600 baud*/

            case BAUD57600:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B57600;

#else

                cfsetispeed(&Posix_CommConfig, B57600);

                cfsetospeed(&Posix_CommConfig, B57600);

#endif

                break;

            /*76800 baud*/

            case BAUD76800:

                TTY_PORTABILITY_WARNING("Posix_QextSerialPort Portability Warning: Windows and some POSIX systems do not support 76800 baud operation.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

#ifdef B76800

                Posix_CommConfig.c_cflag|=B76800;

#else

                TTY_WARNING("Posix_QextSerialPort: Posix_QextSerialPort was compiled without 76800 baud support.  Switching to 57600 baud.");

                Posix_CommConfig.c_cflag|=B57600;

#endif //B76800

#else  //CBAUD

#ifdef B76800

                cfsetispeed(&Posix_CommConfig, B76800);

                cfsetospeed(&Posix_CommConfig, B76800);

#else

                TTY_WARNING("Posix_QextSerialPort: Posix_QextSerialPort was compiled without 76800 baud support.  Switching to 57600 baud.");

                cfsetispeed(&Posix_CommConfig, B57600);

                cfsetospeed(&Posix_CommConfig, B57600);

#endif //B76800

#endif //CBAUD

                break;

            /*115200 baud*/

            case BAUD115200:

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B115200;

#else

                cfsetispeed(&Posix_CommConfig, B115200);

                cfsetospeed(&Posix_CommConfig, B115200);

#endif

                break;

            /*128000 baud*/

            case BAUD128000:

                TTY_WARNING("Posix_QextSerialPort: POSIX does not support 128000 baud operation.  Switching to 115200 baud.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B115200;

#else

                cfsetispeed(&Posix_CommConfig, B115200);

                cfsetospeed(&Posix_CommConfig, B115200);

#endif

                break;

            /*256000 baud*/

            case BAUD256000:

                TTY_WARNING("Posix_QextSerialPort: POSIX does not support 256000 baud operation.  Switching to 115200 baud.");

#ifdef CBAUD

                Posix_CommConfig.c_cflag&=(~CBAUD);

                Posix_CommConfig.c_cflag|=B115200;

#else

                cfsetispeed(&Posix_CommConfig, B115200);

                cfsetospeed(&Posix_CommConfig, B115200);

#endif

                break;

        }

        tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

    }

    UNLOCK_MUTEX();

}

/*!

\fn void Posix_QextSerialPort::setDataBits(DataBitsType dataBits)

Sets the number of data bits used by the serial port.  Possible values of dataBits are:

\verbatim

    DATA_5      5 data bits

    DATA_6      6 data bits

    DATA_7      7 data bits

    DATA_8      8 data bits

\endverbatim

\note

This function is subject to the following restrictions:

\par

    5 data bits cannot be used with 2 stop bits.

\par

    8 data bits cannot be used with space parity on POSIX systems.

*/

void Posix_QextSerialPort::setDataBits(DataBitsType dataBits)

{

    LOCK_MUTEX();

    if (Settings.DataBits!=dataBits) {

        if ((Settings.StopBits==STOP_2 && dataBits==DATA_5) ||

            (Settings.StopBits==STOP_1_5 && dataBits!=DATA_5) ||

            (Settings.Parity==PAR_SPACE && dataBits==DATA_8)) {

        }

        else {

            Settings.DataBits=dataBits;

        }

    }

    if (isOpen()) {

        switch(dataBits) {

            /*5 data bits*/

            case DATA_5:

                if (Settings.StopBits==STOP_2) {

                    TTY_WARNING("Posix_QextSerialPort: 5 Data bits cannot be used with 2 stop bits.");

                }

                else {

                    Settings.DataBits=dataBits;

                    Posix_CommConfig.c_cflag&=(~CSIZE);

                    Posix_CommConfig.c_cflag|=CS5;

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

            /*6 data bits*/

            case DATA_6:

                if (Settings.StopBits==STOP_1_5) {

                    TTY_WARNING("Posix_QextSerialPort: 6 Data bits cannot be used with 1.5 stop bits.");

                }

                else {

                    Settings.DataBits=dataBits;

                    Posix_CommConfig.c_cflag&=(~CSIZE);

                    Posix_CommConfig.c_cflag|=CS6;

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

            /*7 data bits*/

            case DATA_7:

                if (Settings.StopBits==STOP_1_5) {

                    TTY_WARNING("Posix_QextSerialPort: 7 Data bits cannot be used with 1.5 stop bits.");

                }

                else {

                    Settings.DataBits=dataBits;

                    Posix_CommConfig.c_cflag&=(~CSIZE);

                    Posix_CommConfig.c_cflag|=CS7;

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

            /*8 data bits*/

            case DATA_8:

                if (Settings.StopBits==STOP_1_5) {

                    TTY_WARNING("Posix_QextSerialPort: 8 Data bits cannot be used with 1.5 stop bits.");

                }

                else {

                    Settings.DataBits=dataBits;

                    Posix_CommConfig.c_cflag&=(~CSIZE);

                    Posix_CommConfig.c_cflag|=CS8;

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

        }

    }

    UNLOCK_MUTEX();

}

/*!

\fn void Posix_QextSerialPort::setParity(ParityType parity)

Sets the parity associated with the serial port.  The possible values of parity are:

\verbatim

    PAR_SPACE       Space Parity

    PAR_MARK        Mark Parity

    PAR_NONE        No Parity

    PAR_EVEN        Even Parity

    PAR_ODD         Odd Parity

\endverbatim

\note

This function is subject to the following limitations:

\par

POSIX systems do not support mark parity.

\par

POSIX systems support space parity only if tricked into doing so, and only with

   fewer than 8 data bits.  Use space parity very carefully with POSIX systems.

*/

void Posix_QextSerialPort::setParity(ParityType parity)

{

    LOCK_MUTEX();

    if (Settings.Parity!=parity) {

        if (parity==PAR_MARK || (parity==PAR_SPACE && Settings.DataBits==DATA_8)) {

        }

        else {

            Settings.Parity=parity;

        }

    }

    if (isOpen()) {

        switch (parity) {

            /*space parity*/

            case PAR_SPACE:

                if (Settings.DataBits==DATA_8) {

                    TTY_PORTABILITY_WARNING("Posix_QextSerialPort:  Space parity is only supported in POSIX with 7 or fewer data bits");

                }

                else {

                    /*space parity not directly supported - add an extra data bit to simulate it*/

                    Posix_CommConfig.c_cflag&=~(PARENB|CSIZE);

                    switch(Settings.DataBits) {

                        case DATA_5:

                            Settings.DataBits=DATA_6;

                            Posix_CommConfig.c_cflag|=CS6;

                            break;

                        case DATA_6:

                            Settings.DataBits=DATA_7;

                            Posix_CommConfig.c_cflag|=CS7;

                            break;

                        case DATA_7:

                            Settings.DataBits=DATA_8;

                            Posix_CommConfig.c_cflag|=CS8;

                            break;

                        case DATA_8:

                            break;

                    }

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

            /*mark parity - WINDOWS ONLY*/

            case PAR_MARK:

                TTY_WARNING("Posix_QextSerialPort: Mark parity is not supported by POSIX.");

                break;

            /*no parity*/

            case PAR_NONE:

                Posix_CommConfig.c_cflag&=(~PARENB);

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

            /*even parity*/

            case PAR_EVEN:

                Posix_CommConfig.c_cflag&=(~PARODD);

                Posix_CommConfig.c_cflag|=PARENB;

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

            /*odd parity*/

            case PAR_ODD:

                Posix_CommConfig.c_cflag|=(PARENB|PARODD);

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

        }

    }

    UNLOCK_MUTEX();

}

/*!

\fn void Posix_QextSerialPort::setStopBits(StopBitsType stopBits)

Sets the number of stop bits used by the serial port.  Possible values of stopBits are:

\verbatim

    STOP_1      1 stop bit

    STOP_1_5    1.5 stop bits

    STOP_2      2 stop bits

\endverbatim

\note

This function is subject to the following restrictions:

\par

    2 stop bits cannot be used with 5 data bits.

\par

    POSIX does not support 1.5 stop bits.

*/

void Posix_QextSerialPort::setStopBits(StopBitsType stopBits)

{

    LOCK_MUTEX();

    if (Settings.StopBits!=stopBits) {

        if ((Settings.DataBits==DATA_5 && stopBits==STOP_2) || stopBits==STOP_1_5) {}

        else {

            Settings.StopBits=stopBits;

        }

    }

    if (isOpen()) {

        switch (stopBits) {

            /*one stop bit*/

            case STOP_1:

                Settings.StopBits=stopBits;

                Posix_CommConfig.c_cflag&=(~CSTOPB);

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

            /*1.5 stop bits*/

            case STOP_1_5:

                TTY_WARNING("Posix_QextSerialPort: 1.5 stop bit operation is not supported by POSIX.");

                break;

            /*two stop bits*/

            case STOP_2:

                if (Settings.DataBits==DATA_5) {

                    TTY_WARNING("Posix_QextSerialPort: 2 stop bits cannot be used with 5 data bits");

                }

                else {

                    Settings.StopBits=stopBits;

                    Posix_CommConfig.c_cflag|=CSTOPB;

                    tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                }

                break;

        }

    }

    UNLOCK_MUTEX();

}

/*!

\fn void Posix_QextSerialPort::setFlowControl(FlowType flow)

Sets the flow control used by the port.  Possible values of flow are:

\verbatim

    FLOW_OFF            No flow control

    FLOW_HARDWARE       Hardware (RTS/CTS) flow control

    FLOW_XONXOFF        Software (XON/XOFF) flow control

\endverbatim

\note

FLOW_HARDWARE may not be supported on all versions of UNIX.  In cases where it is

unsupported, FLOW_HARDWARE is the same as FLOW_OFF.

*/

void Posix_QextSerialPort::setFlowControl(FlowType flow)

{

    LOCK_MUTEX();

    if (Settings.FlowControl!=flow) {

        Settings.FlowControl=flow;

    }

    if (isOpen()) {

        switch(flow) {

            /*no flow control*/

            case FLOW_OFF:

                Posix_CommConfig.c_cflag&=(~CRTSCTS);

                Posix_CommConfig.c_iflag&=(~(IXON|IXOFF|IXANY));

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

            /*software (XON/XOFF) flow control*/

            case FLOW_XONXOFF:

                Posix_CommConfig.c_cflag&=(~CRTSCTS);

                Posix_CommConfig.c_iflag|=(IXON|IXOFF|IXANY);

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

            case FLOW_HARDWARE:

                Posix_CommConfig.c_cflag|=CRTSCTS;

                Posix_CommConfig.c_iflag&=(~(IXON|IXOFF|IXANY));

                tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

                break;

        }

    }

    UNLOCK_MUTEX();

}

/*!

\fn void Posix_QextSerialPort::setTimeout(ulong sec, ulong millisec);

Sets the read and write timeouts for the port to sec seconds and millisec milliseconds.

Note that this is a per-character timeout, i.e. the port will wait this long for each

individual character, not for the whole read operation.  This timeout also applies to the

bytesWaiting() function.

\note

POSIX does not support millisecond-level control for I/O timeout values.  Any

timeout set using this function will be set to the next lowest tenth of a second for

the purposes of detecting read or write timeouts.  For example a timeout of 550 milliseconds

will be seen by the class as a timeout of 500 milliseconds for the purposes of reading and

writing the port.  However millisecond-level control is allowed by the select() system call,

so for example a 550-millisecond timeout will be seen as 550 milliseconds on POSIX systems for

the purpose of detecting available bytes in the read buffer.

*/

void Posix_QextSerialPort::setTimeout(ulong sec, ulong millisec)

{

    LOCK_MUTEX();

    Settings.Timeout_Sec=sec;

    Settings.Timeout_Millisec=millisec;

    Posix_Copy_Timeout.tv_sec=sec;

    Posix_Copy_Timeout.tv_usec=millisec;

    if (isOpen()) {

        tcgetattr(Posix_File->handle(), &Posix_CommConfig);

        Posix_CommConfig.c_cc[VTIME]=sec*10+millisec/100;

        tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

    }

    UNLOCK_MUTEX();

}

/*!

\fn bool Posix_QextSerialPort::open(OpenMode mode)

Opens the serial port associated to this class.

This function has no effect if the port associated with the class is already open.

The port is also configured to the current settings, as stored in the Settings structure.

*/

bool Posix_QextSerialPort::open(OpenMode mode)

{

    LOCK_MUTEX();

    if (mode == QIODevice::NotOpen)

        return isOpen();

    if (!isOpen()) {

        /*open the port*/

        Posix_File->setFileName(port);

        qDebug("Trying to open File");

        if (Posix_File->open(QIODevice::ReadWrite|QIODevice::Unbuffered)) {

            qDebug("Opened File succesfully");

            /*set open mode*/

            QIODevice::open(mode);

            /*configure port settings*/

            tcgetattr(Posix_File->handle(), &Posix_CommConfig);

            /*set up other port settings*/

            Posix_CommConfig.c_cflag|=CREAD|CLOCAL;

            Posix_CommConfig.c_lflag&=(~(ICANON|ECHO|ECHOE|ECHOK|ECHONL|ISIG));

            Posix_CommConfig.c_iflag&=(~(INPCK|IGNPAR|PARMRK|ISTRIP|ICRNL|IXANY));