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#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include "io_serial.h"
IOSerial::IOSerial(const Profile &config) : IOLayer(config) {
m_read = 0l;
m_error = 0l;
m_fd = 0;
m_connected = false;
reload(config);
}
IOSerial::~IOSerial() {
if (m_fd) {
close();
}
}
void IOSerial::send(const QByteArray &data) {
if (m_fd) {
write(m_fd, data.data(), data.size());
} else {
emit error(Refuse, tr("Not connected"));
}
}
void IOSerial::close() {
if (m_fd) {
delete m_read;
delete m_error;
::close(m_fd);
m_fd = 0;
m_connected = false;
} else {
m_connected = false;
emit error(Refuse, tr("Not connected"));
}
}
bool IOSerial::open() {
if (!m_fd) {
struct termios tty;
m_fd = ::open(m_device, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (m_fd < 0) {
emit error(CouldNotOpen, strerror(errno));
m_fd = 0;
return FALSE;
}
tcgetattr(m_fd, &tty);
/* Baud rate */
int speed = baud(m_baud);
if (speed == -1) {
emit error(Refuse, tr("Invalid baud rate"));
}
cfsetospeed(&tty, speed);
cfsetispeed(&tty, speed);
/* Take care of Space / Mark parity */
if (m_dbits == 7 && (m_parity == ParitySpace || m_parity == ParityMark)) {
m_dbits = 8;
}
/* Data bits */
switch (m_dbits) {
case 5: tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS5; break;
case 6: tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS6; break;
case 7: tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS7; break;
case 8: tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS8; break;
default: break;
}
/* Raw, no echo mode */
tty.c_iflag = IGNBRK;
tty.c_lflag = 0;
tty.c_oflag = 0;
tty.c_cflag |= CLOCAL | CREAD;
/* Stop bits */
if (m_sbits == 2) {
tty.c_cflag |= CSTOPB;
} else {
tty.c_cflag &= ~CSTOPB;
}
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 5;
/* Flow control */
if (m_flow & FlowSW)
tty.c_iflag |= IXON | IXOFF;
else
tty.c_iflag &= ~(IXON|IXOFF|IXANY);
if (m_flow & FlowHW)
tty.c_cflag |= CRTSCTS;
else
tty.c_cflag &= ~CRTSCTS;
/* Parity */
tty.c_cflag &= ~(PARENB | PARODD);
if (m_parity & ParityEven)
tty.c_cflag |= PARENB;
else if (m_parity & ParityOdd)
tty.c_cflag |= (PARENB | PARODD);
/* Set the changes */
tcsetattr(m_fd, TCSANOW, &tty);
/* Notifications on read & errors */
m_read = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
m_error = new QSocketNotifier(m_fd, QSocketNotifier::Exception, this);
connect(m_read, SIGNAL(activated(int)), this, SLOT(dataArrived()));
connect(m_error, SIGNAL(activated(int)), this, SLOT(errorOccured()));
m_connected = false;
return TRUE;
} else {
emit error(Refuse, tr("Device is already connected"));
m_fd = 0;
return FALSE;
}
}
void IOSerial::reload(const Profile &config) {
m_device = config.readEntry("Device", SERIAL_DEFAULT_DEVICE);
m_baud = config.readNumEntry("Speed", SERIAL_DEFAULT_BAUD);
m_parity = config.readNumEntry("Parity", SERIAL_DEFAULT_PARITY);
m_dbits = config.readNumEntry("DataBits", SERIAL_DEFAULT_DBITS);
m_sbits = config.readNumEntry("StopBits", SERIAL_DEFAULT_SBITS);
m_flow = config.readNumEntry("Flow", SERIAL_DEFAULT_FLOW);
}
int IOSerial::baud(int baud) const {
switch (baud) {
case 300: return B300; break;
case 600: return B600; break;
case 1200: return B1200; break;
case 2400: return B2400; break;
case 4800: return B4800; break;
case 9600: return B9600; break;
case 19200: return B19200; break;
case 38400: return B38400; break;
case 57600: return B57600; break;
case 115200: return B115200; break;
}
return -1;
}
void IOSerial::errorOccured() {
emit error(ClosedUnexpected, strerror(errno));
close();
}
void IOSerial::dataArrived() {
QByteArray array(4097);
int len = read(m_fd, array.data(), 4096);
if (len == 0)
close();
if (len < 0)
return;
array.resize( len );
emit received(array);
}
QString IOSerial::identifier() const {
return "serial";
}
QString IOSerial::name() const {
return "RS232 Serial IO Layer";
}
int IOSerial::rawIO()const {
if (m_read )
disconnect(m_read, SIGNAL(activated(int)), this, SLOT(dataArrived()));
if (m_error )
disconnect(m_error, SIGNAL(activated(int)), this, SLOT(errorOccured()));
int fd = ::open(m_device, O_RDWR );
return fd;
};
void IOSerial::closeRawIO(int fd) {
if (m_read )
connect(m_read, SIGNAL(activated(int)), this, SLOT(dataArrived()));
if (m_error )
connect(m_error, SIGNAL(activated(int)), this, SLOT(errorOccured()));
::close( fd );
}
QBitArray IOSerial::supports()const {
QBitArray ar(3);
ar[0] = ar[2] = 0;
ar[1] = 1;
return ar;
}
bool IOSerial::isConnected() {
return m_connected;
}
/*
* this is used to give the
* class below IOSerial
* the possibility of
* exclusive usage
*/
void IOSerial::internDetach() {
if (m_read )
disconnect(m_read, SIGNAL(activated(int)), this, SLOT(dataArrived()));
if (m_error )
disconnect(m_error, SIGNAL(activated(int)), this, SLOT(errorOccured()));
}
/*
* give power back
*/
void IOSerial::internAttach() {
if (m_read )
connect(m_read, SIGNAL(activated(int)), this, SLOT(dataArrived()));
if (m_error )
connect(m_error, SIGNAL(activated(int)), this, SLOT(errorOccured()));
}
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