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posix_qextserialport.cpp
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/*!
\class Posix_QextSerialPort
\version 1.0.0
\author Stefan Sander
\author Michal Policht
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::QueryMode mode)
: QextSerialBase(name)
{
Posix_File=new QFile();
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::QueryMode mode)
: QextSerialBase()
{
setBaudRate(settings.BaudRate);
setDataBits(settings.DataBits);
setParity(settings.Parity);
setStopBits(settings.StopBits);
setFlowControl(settings.FlowControl);
Posix_File=new QFile();
setTimeout(settings.Timeout_Millisec);
setQueryMode(mode);
init();
}
/*!
\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::QueryMode mode)
: QextSerialBase(name)
{
setBaudRate(settings.BaudRate);
setDataBits(settings.DataBits);
setParity(settings.Parity);
setStopBits(settings.StopBits);
setFlowControl(settings.FlowControl);
Posix_File=new QFile();
setTimeout(settings.Timeout_Millisec);
setQueryMode(mode);
init();
}
/*!
\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;
}
void Posix_QextSerialPort::init()
{
if (queryMode() == QextSerialBase::EventDriven)
qWarning("POSIX doesn't have event driven mechanism implemented yet");
}
/*!
\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);
Sets the read and write timeouts for the port to 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(long millisec)
{
LOCK_MUTEX();
Settings.Timeout_Millisec = millisec;
Posix_Copy_Timeout.tv_sec = millisec / 1000;
Posix_Copy_Timeout.tv_usec = millisec % 1000;
if (isOpen()) {
tcgetattr(Posix_File->handle(), &Posix_CommConfig);
Posix_CommConfig.c_cc[VTIME] = 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));
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);
} else {
qDebug("Could not open File! Error code : %d", Posix_File->error());
}
}
UNLOCK_MUTEX();
return isOpen();
}
/*!
\fn void Posix_QextSerialPort::close()
Closes a serial port. This function has no effect if the serial port associated with the class
is not currently open.
*/
void Posix_QextSerialPort::close()
{
LOCK_MUTEX();
Posix_File->close();
QIODevice::close();
UNLOCK_MUTEX();
}
/*!
\fn void Posix_QextSerialPort::flush()
Flushes all pending I/O to the serial port. This function has no effect if the serial port
associated with the class is not currently open.
*/
void Posix_QextSerialPort::flush()
{
LOCK_MUTEX();
if (isOpen()) {
Posix_File->flush();
}
UNLOCK_MUTEX();
}
/*!
\fn qint64 Posix_QextSerialPort::size() const
This function will return the number of bytes waiting in the receive queue of the serial port.
It is included primarily to provide a complete QIODevice interface, and will not record errors
in the lastErr member (because it is const). This function is also not thread-safe - in
multithreading situations, use Posix_QextSerialPort::bytesWaiting() instead.
*/
qint64 Posix_QextSerialPort::size() const
{
int numBytes;
if (ioctl(Posix_File->handle(), FIONREAD, &numBytes)<0) {
numBytes=0;
}
return (qint64)numBytes;
}
/*!
\fn qint64 Posix_QextSerialPort::bytesAvailable()
Returns the number of bytes waiting in the port's receive queue. This function will return 0 if
the port is not currently open, or -1 on error. Error information can be retrieved by calling
Posix_QextSerialPort::getLastError().
*/
qint64 Posix_QextSerialPort::bytesAvailable()
{
LOCK_MUTEX();
if (isOpen()) {
int bytesQueued;
fd_set fileSet;
FD_ZERO(&fileSet);
FD_SET(Posix_File->handle(), &fileSet);
/*on Linux systems the Posix_Timeout structure will be altered by the select() call.
Make sure we use the right timeout values*/
//memcpy(&Posix_Timeout, &Posix_Copy_Timeout, sizeof(struct timeval));
Posix_Timeout = Posix_Copy_Timeout;
int n=select(Posix_File->handle()+1, &fileSet, NULL, &fileSet, &Posix_Timeout);
if (!n) {
lastErr=E_PORT_TIMEOUT;
UNLOCK_MUTEX();
return -1;
}
if (n==-1 || ioctl(Posix_File->handle(), FIONREAD, &bytesQueued)==-1) {
translateError(errno);
UNLOCK_MUTEX();
return -1;
}
lastErr=E_NO_ERROR;
UNLOCK_MUTEX();
return bytesQueued + QIODevice::bytesAvailable();
}
UNLOCK_MUTEX();
return 0;
}
/*!
\fn void Posix_QextSerialPort::ungetChar(char)
This function is included to implement the full QIODevice interface, and currently has no
purpose within this class. This function is meaningless on an unbuffered device and currently
only prints a warning message to that effect.
*/
void Posix_QextSerialPort::ungetChar(char)
{
/*meaningless on unbuffered sequential device - return error and print a warning*/
TTY_WARNING("Posix_QextSerialPort: ungetChar() called on an unbuffered sequential device - operation is meaningless");
}
/*!
\fn void Posix_QextSerialPort::translateError(ulong error)
Translates a system-specific error code to a QextSerialPort error code. Used internally.
*/
void Posix_QextSerialPort::translateError(ulong error)
{
switch (error) {
case EBADF:
case ENOTTY:
lastErr=E_INVALID_FD;
break;
case EINTR:
lastErr=E_CAUGHT_NON_BLOCKED_SIGNAL;
break;
case ENOMEM:
lastErr=E_NO_MEMORY;
break;
}
}
/*!
\fn void Posix_QextSerialPort::setDtr(bool set)
Sets DTR line to the requested state (high by default). This function will have no effect if
the port associated with the class is not currently open.
*/
void Posix_QextSerialPort::setDtr(bool set)
{
LOCK_MUTEX();
if (isOpen()) {
int status;
ioctl(Posix_File->handle(), TIOCMGET, &status);
if (set) {
status|=TIOCM_DTR;
}