Qt串口通信程序源代码

/*! \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("Posi