C++ setBaudRate函数代码示例

/*!
\fn bool Win_QextSerialPort::open(OpenMode mode)
Opens a serial port.  Note that this function does not specify which device to open.  If you need
to open a device by name, see Win_QextSerialPort::open(const char*).  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 Win_QextSerialPort::open(OpenMode mode) {
	unsigned long confSize = sizeof(COMMCONFIG);
	Win_CommConfig.dwSize = confSize;
	DWORD dwFlagsAndAttributes = 0;
	if (queryMode() == QextSerialBase::EventDriven)
		dwFlagsAndAttributes += FILE_FLAG_OVERLAPPED;

    LOCK_MUTEX();
    if (mode == QIODevice::NotOpen)
        return isOpen();
    if (!isOpen()) {
        /*open the port*/
		Win_Handle = CreateFileA(port.toLatin1(), GENERIC_READ | GENERIC_WRITE,
                              0, NULL, OPEN_ALWAYS, dwFlagsAndAttributes, NULL);
        if (Win_Handle!=INVALID_HANDLE_VALUE) {
            /*configure port settings*/
            GetCommConfig(Win_Handle, &Win_CommConfig, &confSize);
            GetCommState(Win_Handle, &(Win_CommConfig.dcb));

            /*set up parameters*/
            Win_CommConfig.dcb.fBinary=TRUE;
            Win_CommConfig.dcb.fInX=FALSE;
            Win_CommConfig.dcb.fOutX=FALSE;
            Win_CommConfig.dcb.fAbortOnError=FALSE;
            Win_CommConfig.dcb.fNull=FALSE;
            setBaudRate(Settings.BaudRate);
            setDataBits(Settings.DataBits);
            setStopBits(Settings.StopBits);
            setParity(Settings.Parity);
            setFlowControl(Settings.FlowControl);
            setTimeout(Settings.Timeout_Millisec);
            SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));

            //init event driven approach
			if (queryMode() == QextSerialBase::EventDriven) {
		        Win_CommTimeouts.ReadIntervalTimeout = MAXDWORD;
		        Win_CommTimeouts.ReadTotalTimeoutMultiplier = 0;
		        Win_CommTimeouts.ReadTotalTimeoutConstant = 0;
				Win_CommTimeouts.WriteTotalTimeoutMultiplier = 0;
				Win_CommTimeouts.WriteTotalTimeoutConstant = 0;
				SetCommTimeouts(Win_Handle, &Win_CommTimeouts);
            	if (!SetCommMask( Win_Handle, EV_TXEMPTY | EV_RXCHAR | EV_DSR)) {
            		qWarning("Failed to set Comm Mask. Error code: %ld", GetLastError());
					UNLOCK_MUTEX();
            		return false;
            	}
            	overlapThread->start();
            }
			QIODevice::open(mode);
        }
    } else {
		UNLOCK_MUTEX();
    	return false;
    }
    UNLOCK_MUTEX();
    return isOpen();
}

Serial::Serial() : Serial("/dev/ttyUSB0", 9600, false, false, 0, 0) {
#else
Serial::Serial() : Serial("\\\\.\\COM1", 9600, false, false, 0, 0) {
#endif

}

#ifndef _WIN32
Serial::Serial(const char *file, int baudRate, bool useParity, bool extraStopBit, unsigned char readMinChars, unsigned char readTimeout) : fd(0),
																																		   tty{0} {
	//Set up serial interface
		//http://linux.die.net/man/3/termios
	fd = open(file, O_RDWR | O_NOCTTY);
	if(fd < 0) {
		Log::logf(Log::ERR, "Serial connection initialization failed!\n");
		throw std::runtime_error("serial initialization failed");
	}

	//Input/output flags
	tty.c_iflag = 0;			//No input processing
	if(useParity) {
		tty.c_iflag |= INPCK;	//Enable input parity checking
	}
	tty.c_oflag = 0;			//No output processing
	//Control flags
	tty.c_cflag = CSIZE;		//Character size mask
	tty.c_cflag |= CS8;			//8 data bits
	if(useParity) {
		tty.c_cflag &= PARENB;	//Enable output parity generation and input parity checking
	} else {
		tty.c_cflag &= ~PARENB;	//Disable parity generation
	}
	if(extraStopBit) {
		tty.c_cflag &= CSTOPB;	//2 stop bits
	} else {
		tty.c_cflag &= ~CSTOPB;	//1 stop bit
	}
	tty.c_cflag |= CREAD;		//Enable read
	tty.c_cflag |= CLOCAL;		//Ignore control lines
	tty.c_cflag &= ~PARODD;		//Even parity, if used
	//Local flags
	tty.c_lflag = 0;			//No local processing: use non-canonical (raw) mode, disable echo, etc.
	//Control characters
	tty.c_cc[VMIN] = readMinChars;	//Block on read until specified number of characters have been read
	tty.c_cc[VTIME] = readTimeout;	//Time-based read, or timeout for blocking read

	//Set intial baud rate
	setBaudRate(baudRate, false);

	//Flush serial port and apply settings
	if(tcsetattr(fd, TCSAFLUSH, &tty) != 0) {
		Log::logf(Log::ERR, "Error applying serial port settings: %s\n", strerror(errno));
		throw std::runtime_error("serial initialization failed");
	}

	Log::logf(Log::INFO, "Serial connection initialized!\n");
}

/*! \brief SerialDevice::stopDevice Is the serial interface's implementation of setDefaults.
 * Sets the serial devices to the default values. (Rate=9600, Parity=None, Flow=None, Data=8, Stop=1)
 */
void SerialDevice::setDefaults()
{
    statusReady = false;
    setBaudRate(9600);
    setParity(0);
    setFlowControl(0);
    setDataBits(8);
    setStopBits(1);
}

/*!
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 QextSerialPort::open(OpenMode mode)
{
    QMutexLocker lock(mutex);
    if (mode == QIODevice::NotOpen)
        return isOpen();
    if (!isOpen()) {
        qDebug() << "trying to open file" << port.toAscii();
        //note: linux 2.6.21 seems to ignore O_NDELAY flag
        if ((fd = ::open(port.toAscii() ,O_RDWR | O_NOCTTY | O_NDELAY)) != -1) {
            qDebug("file opened succesfully");

            setOpenMode(mode);              // Flag the port as opened
            tcgetattr(fd, &old_termios);    // Save the old termios
            Posix_CommConfig = old_termios; // Make a working copy


            /* the equivelent of cfmakeraw() to enable raw access */
#ifdef HAVE_CFMAKERAW
            cfmakeraw(&Posix_CommConfig);   // Enable raw access
#else
            Posix_CommConfig.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
                                    | INLCR | IGNCR | ICRNL | IXON);
            Posix_CommConfig.c_oflag &= ~OPOST;
            Posix_CommConfig.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
            Posix_CommConfig.c_cflag &= ~(CSIZE | PARENB);
            Posix_CommConfig.c_cflag |= CS8;
#endif

            /*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));
            Posix_CommConfig.c_oflag&=(~OPOST);
            Posix_CommConfig.c_cc[VMIN]= 0;
#ifdef _POSIX_VDISABLE  // Is a disable character available on this system?
            // Some systems allow for per-device disable-characters, so get the
            //  proper value for the configured device
            const long vdisable = fpathconf(fd, _PC_VDISABLE);
            Posix_CommConfig.c_cc[VINTR] = vdisable;
            Posix_CommConfig.c_cc[VQUIT] = vdisable;
            Posix_CommConfig.c_cc[VSTART] = vdisable;
            Posix_CommConfig.c_cc[VSTOP] = vdisable;
            Posix_CommConfig.c_cc[VSUSP] = vdisable;
#endif //_POSIX_VDISABLE
            setBaudRate(Settings.BaudRate);
            setDataBits(Settings.DataBits);
            setParity(Settings.Parity);
            setStopBits(Settings.StopBits);
            setFlowControl(Settings.FlowControl);
            setTimeout(Settings.Timeout_Millisec);
            tcsetattr(fd, TCSAFLUSH, &Posix_CommConfig);

            if (queryMode() == QextSerialPort::EventDriven) {
                readNotifier = new QSocketNotifier(fd, QSocketNotifier::Read, this);
                connect(readNotifier, SIGNAL(activated(int)), this, SIGNAL(readyRead()));
            }

/*!
Opens a serial port.  Note that this function does not specify which device to open.  If you need
to open a device by name, see QextSerialPort::open(const char*).  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 QextSerialPort::open(OpenMode mode) {
    unsigned long confSize = sizeof(COMMCONFIG);
    Win_CommConfig.dwSize = confSize;
    DWORD dwFlagsAndAttributes = 0;
    if (queryMode() == QextSerialPort::EventDriven)
        dwFlagsAndAttributes += FILE_FLAG_OVERLAPPED;

    QMutexLocker lock(mutex);
    if (mode == QIODevice::NotOpen)
        return isOpen();
    if (!isOpen()) {
        /*open the port*/
        Win_Handle=CreateFileA(port.toAscii(), GENERIC_READ|GENERIC_WRITE,
                              0, NULL, OPEN_EXISTING, dwFlagsAndAttributes, NULL);
        if (Win_Handle!=INVALID_HANDLE_VALUE) {
            QIODevice::open(mode);
            /*configure port settings*/
            GetCommConfig(Win_Handle, &Win_CommConfig, &confSize);
            GetCommState(Win_Handle, &(Win_CommConfig.dcb));

            /*set up parameters*/
            Win_CommConfig.dcb.fBinary=TRUE;
            Win_CommConfig.dcb.fInX=FALSE;
            Win_CommConfig.dcb.fOutX=FALSE;
            Win_CommConfig.dcb.fAbortOnError=FALSE;
            Win_CommConfig.dcb.fNull=FALSE;
            setBaudRate(Settings.BaudRate);
            setDataBits(Settings.DataBits);
            setStopBits(Settings.StopBits);
            setParity(Settings.Parity);
            setFlowControl(Settings.FlowControl);
            setTimeout(Settings.Timeout_Millisec);
            SetCommConfig(Win_Handle, &Win_CommConfig, sizeof(COMMCONFIG));

            //init event driven approach
            if (queryMode() == QextSerialPort::EventDriven) {
                Win_CommTimeouts.ReadIntervalTimeout = MAXDWORD;
                Win_CommTimeouts.ReadTotalTimeoutMultiplier = 0;
                Win_CommTimeouts.ReadTotalTimeoutConstant = 0;
                Win_CommTimeouts.WriteTotalTimeoutMultiplier = 0;
                Win_CommTimeouts.WriteTotalTimeoutConstant = 0;
                SetCommTimeouts(Win_Handle, &Win_CommTimeouts);
                if (!SetCommMask( Win_Handle, EV_TXEMPTY | EV_RXCHAR | EV_DSR)) {
                    qWarning() << "failed to set Comm Mask. Error code:", GetLastError();
                    return false;
                }
                winEventNotifier = new QWinEventNotifier(overlap.hEvent, this);
                connect(winEventNotifier, SIGNAL(activated(HANDLE)), this, SLOT(onWinEvent(HANDLE)));
                WaitCommEvent(Win_Handle, &eventMask, &overlap);
            }
        }
    } else {
        return false;
    }
    return isOpen();
}

/*!
\fn Posix_QextSerialPort::Posix_QextSerialPort(const char* name, const PortSettings& settings)
Constructs a port with specified name and settings.
*/
Posix_QextSerialPort::Posix_QextSerialPort(const char* name, const PortSettings& settings)
                     :QextSerialBase(name) {
    construct();
    setBaudRate(settings.BaudRate);
    setDataBits(settings.DataBits);
    setStopBits(settings.StopBits);
    setParity(settings.Parity);
    setFlowControl(settings.FlowControl);
    setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);
}

void SpiUartDevice::configureUart(unsigned long baudrate) 
{
    setBaudRate(baudrate);

    writeRegister(LCR, 0xBF); // access EFR register
    writeRegister(EFR, SPI_Uart_config.Flow); // enable enhanced registers
    writeRegister(LCR, SPI_Uart_config.DataFormat); // 8 data bit, 1 stop bit, no parity
    writeRegister(FCR, 0x06); // reset TXFIFO, reset RXFIFO, non FIFO mode
    writeRegister(FCR, 0x01); // enable FIFO mode     
}

/*!
		\fn Win_QextSerialPort::Win_QextSerialPort(const QString & name, const PortSettings& settings)
			Constructs a port with specified name and settings.
*/
Win_QextSerialPort::Win_QextSerialPort(const QString & name, const PortSettings& settings) {
	Win_Handle=INVALID_HANDLE_VALUE;
	setPortName(name);
	setBaudRate(settings.BaudRate);
	setDataBits(settings.DataBits);
	setStopBits(settings.StopBits);
	setParity(settings.Parity);
	setFlowControl(settings.FlowControl);
	setTimeout(settings.Timeout_Sec, settings.Timeout_Millisec);
}

/*!
\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)
    {
        UNLOCK_MUTEX();
        return isOpen();
    }

    if (!isOpen())
    {
        /*open the port*/
        Posix_File->setFileName(port);
        QueueReceiveSignals = 10;
        if (Posix_File->open(QIODevice::ReadWrite | QIODevice::Unbuffered))
        {
            /*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|IGNBRK|PARMRK|ISTRIP|ICRNL|IXANY));
            Posix_CommConfig.c_oflag&=(~OPOST);
            Posix_CommConfig.c_cc[VMIN]=0;
            Posix_CommConfig.c_cc[VINTR] = _POSIX_VDISABLE;
            Posix_CommConfig.c_cc[VQUIT] = _POSIX_VDISABLE;
            Posix_CommConfig.c_cc[VSTART] = _POSIX_VDISABLE;
            Posix_CommConfig.c_cc[VSTOP] = _POSIX_VDISABLE;
            Posix_CommConfig.c_cc[VSUSP] = _POSIX_VDISABLE;
            setBaudRate(Settings.BaudRate);
            setDataBits(Settings.DataBits);
            setParity(Settings.Parity);
            setStopBits(Settings.StopBits);
            setFlowControl(Settings.FlowControl);
            //setTimeout(Settings.Timeout_Sec, Settings.Timeout_Millisec);
            setTimeout(Settings.Timeout_Millisec);
            tcsetattr(Posix_File->handle(), TCSAFLUSH, &Posix_CommConfig);

            handle = Posix_File->handle();
            readerThread->handle = handle;
            readerThread->shutdown = false;
            readerThread->start();
        }
        else
        {
            qDebug("Could not open File! Error code : %d", Posix_File->error());
        }
    }
    UNLOCK_MUTEX();
    return isOpen();
}

/*!
 * \brief SerialDev::configPort - Parametri per configurare la porta seriale
 * \return true se riesce a configurare correttamente la porta seriale
 */
bool SerialDev::configPort (const QString &name)
{
    bool debugVal = m_debug;
    m_debug = true;
    setPortName(name);

    if (!open(QIODevice::ReadWrite)) {
        QString testo = QString("Can't open %1, error code %2")
                    .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    if (!setBaudRate(QSerialPort::Baud115200)) {
        QString testo = QString("Can't set rate 115200 baud to port %1, error code %2")
                     .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    if (!setDataBits(QSerialPort::Data8)) {
        QString testo = QString("Can't set 8 data bits to port %1, error code %2")
                     .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    if (!setParity(QSerialPort::NoParity)) {
        QString testo = QString("Can't set no patity to port %1, error code %2")
                     .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    if (!setStopBits(QSerialPort::OneStop)) {
        QString testo = QString("Can't set 1 stop bit to port %1, error code %2")
                     .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    if (!setFlowControl(QSerialPort::NoFlowControl)) {
        QString testo = QString("Can't set no flow control to port %1, error code %2")
                     .arg(portName()).arg(error());
        debug(testo);
        return false;
    }

    connect(this, SIGNAL(error(QSerialPort::SerialPortError)),
            this, SLOT(errorSlot(QSerialPort::SerialPortError)));
    connect(this, SIGNAL(readyRead()), this, SLOT(fromDeviceSlot()));

    m_debug = debugVal;
   return true;
}

JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_configPort(JNIEnv *env, jobject obj, jlong serialPortFD)
{
	if (serialPortFD <= 0)
		return JNI_FALSE;
	struct termios options = { 0 };

	// Get port parameters from Java class
	int baudRate = (*env)->GetIntField(env, obj, baudRateField);
	int byteSizeInt = (*env)->GetIntField(env, obj, dataBitsField);
	int stopBitsInt = (*env)->GetIntField(env, obj, stopBitsField);
	int parityInt = (*env)->GetIntField(env, obj, parityField);
	tcflag_t byteSize = (byteSizeInt == 5) ? CS5 : (byteSizeInt == 6) ? CS6 : (byteSizeInt == 7) ? CS7 : CS8;
	tcflag_t stopBits = ((stopBitsInt == com_fazecast_jSerialComm_SerialPort_ONE_STOP_BIT) || (stopBitsInt == com_fazecast_jSerialComm_SerialPort_ONE_POINT_FIVE_STOP_BITS)) ? 0 : CSTOPB;
	tcflag_t parity = (parityInt == com_fazecast_jSerialComm_SerialPort_NO_PARITY) ? 0 : (parityInt == com_fazecast_jSerialComm_SerialPort_ODD_PARITY) ? (PARENB | PARODD) : (parityInt == com_fazecast_jSerialComm_SerialPort_EVEN_PARITY) ? PARENB : (parityInt == com_fazecast_jSerialComm_SerialPort_MARK_PARITY) ? (PARENB | CMSPAR | PARODD) : (PARENB | CMSPAR);

	// Clear any serial port flags
	if (isatty(serialPortFD))
		fcntl(serialPortFD, F_SETFL, 0);

	// Set raw-mode to allow the use of ioctl()
	if (isatty(serialPortFD))
		ioctl(serialPortFD, TCGETS, &options);
	else
		return JNI_FALSE;
	cfmakeraw(&options);

	// Set updated port parameters
	options.c_cflag = (byteSize | stopBits | parity | CLOCAL | CREAD);
	if (parityInt == com_fazecast_jSerialComm_SerialPort_SPACE_PARITY)
		options.c_cflag &= ~PARODD;
	options.c_iflag &= ~(INPCK | IGNPAR | PARMRK | ISTRIP);
	if (byteSizeInt < 8)
		options.c_iflag |= ISTRIP;
	if (parityInt != 0)
		options.c_iflag |= (INPCK | IGNPAR);

	// Set baud rate
	unsigned int baudRateCode = getBaudRateCode(baudRate);
	if (baudRateCode != 0)
	{
		cfsetispeed(&options, baudRateCode);
		cfsetospeed(&options, baudRateCode);
	}

	// Apply changes
	int retVal = -1;
	if (isatty(serialPortFD))
		retVal = ioctl(serialPortFD, TCSETS, &options);
	else
		return JNI_FALSE;
	if (baudRateCode == 0)					// Set custom baud rate
		setBaudRate(serialPortFD, baudRate);
	return ((retVal == 0) ? JNI_TRUE : JNI_FALSE);
}

/*!
\fn Win_QextSerialPort::Win_QextSerialPort(const PortSettings& settings)
Constructs a port with default name and specified settings.
*/
Win_QextSerialPort::Win_QextSerialPort(const PortSettings& settings, QextSerialBase::QueryMode mode) {
    Win_Handle=INVALID_HANDLE_VALUE;
    setBaudRate(settings.BaudRate);
    setDataBits(settings.DataBits);
    setStopBits(settings.StopBits);
    setParity(settings.Parity);
    setFlowControl(settings.FlowControl);
    setTimeout(settings.Timeout_Millisec);
    setQueryMode(mode);
    init();
}

/*!
\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);
}

bool D2xxSerial::open(string who, int baudRate) {
	
	FT_STATUS err = FT_OpenEx((void*)who.c_str(), FT_OPEN_BY_SERIAL_NUMBER, &handle);
	
	if (err != FT_OK) {
		// FT_OpenEx failed
		printf("Error connecting to '%s': %s\n", who.c_str(), getError(err));
		return false;
	}
	setBaudRate(baudRate);
	return true;
}

bool D2xxSerial::open(int which, int baudRate) {
	
	FT_STATUS err = FT_Open(0,&handle);
	if (err != FT_OK) {
		// FT_OpenEx failed
		printf("Error connecting to [%d]: %s\n", which, getError(err));
		return false;
	}
	
	setBaudRate(baudRate);
	return true;
}