C++ (Cpp) serial_port_error示例

示例#1

文件： serialport.cpp 项目： cyrilh/bldc-tool

void SerialPort::run()
{
    unsigned char buffer[1024];
    int res = 0;
    int failed_reads = 0;
    fd_set set;
    timespec timeout;
    
    while (false == mAbort)
    {
        FD_ZERO(&set); /* clear the set */
        FD_SET(mFd, &set); /* add our file descriptor to the set */
        timeout.tv_sec = 0;
        timeout.tv_nsec = 10000000;
        res = pselect(mFd + 1, &set, NULL, NULL, &timeout, NULL);
        
        if(res < 0)
        {
            qWarning() << "Select failed in read thread";
        } else if(res == 0)
        {
            // Timeout
        } else
        {
            res = read(mFd, buffer, 1024);
            if (res > 0)
            {
                failed_reads = 0;
                
                QMutexLocker locker(&mMutex);
                for (int i = 0;i < res;i++)
                {
                    if (mCaptureBytes > 0)
                    {
                        if (mCaptureBuffer != 0)
                        {
                            mCaptureBuffer[mCaptureWrite] = buffer[i];
                            mCaptureWrite++;
                        }
                        mCaptureBytes--;
                        if (mCaptureBytes == 0)
                        {
                            mCondition.wakeOne();
                        }
                    } else
                    {
                        mReadBuffer[mBufferWrite] = buffer[i];
                        mBufferWrite++;
                        //qDebug() << (quint8)buffer[i];
                        
                        if (mBufferWrite == mBufferSize)
                        {
                            mBufferWrite = 0;
                        }
                        Q_EMIT serial_data_available();
                    }
                }
            } else
            {
                if (res < 0) {
                    qCritical().nospace() << "Reading failed. MSG: " << strerror(errno);
                } else {
                    qCritical().nospace() << "Reading serial port returned 0";
                }
                
                failed_reads++;
                
                if (failed_reads > 3) {
                    QMutexLocker locker(&mMutex);
                    if (mIsOpen) {
                        close(mFd);
                        mIsOpen = false;
                    }
                    mAbort = true;
                    qCritical().nospace() << "Too many consecutive failed reads. Closing port.";
                    Q_EMIT serial_port_error(res);
                    return;
                }
            }
        }
    }
}

示例#2

文件： dilambda.cpp 项目： OpenScienceTools/DI-Lambda-qlambda

DiLambda::DiLambda(QObject *parent) :
    QObject(parent)
{
    connect(&current_port, SIGNAL(readyRead()), this, SLOT(data_available()));
    connect(&current_port, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(serial_port_error(QSerialPort::SerialPortError)));
}