qt_qcp_show/serial/serialport.cpp

#include "serialport.h"
#include "util/commonutil.h"
#include <QtCore>

SerialPort::SerialPort(QObject *parent)
    :QObject(parent)
{
    m_serial = Q_NULLPTR;
    m_connected = false;
    m_rbuffer.clear();
    m_wbuffer.clear();
    m_currentPortName = "";
    m_currentBaudRate = "";
}

SerialPort::~SerialPort(){}

/**
 * 8N1 (8个数据位，1个停止位，无校验)
 * @brief SerialPort::openSerialPort
 * @param serialName
 * @param baudrate
 */

#if 0
bool SerialPort::openSerialPort(QString serialName, quint32 baudrate)
{
    qDebug() << "QSeriaport Attempting connect to " << serialName << "," << baudrate;
    //如果已经打开，先执行关闭操作
    disConnected();

    //记录当前正在使用的串口信息
    m_currentPortName = serialName;
    m_currentBaudRate = QString::number(baudrate);

    //设置串口属性，并且打开
    m_serial = new QSerialPort();
    //connect(m_serial,SIGNAL(readyRead()),this,SLOT(readData));
    connect(m_serial,&QSerialPort::readyRead,this,&SerialPort::readData);
    connect(m_serial,SIGNAL(error(QSerialPort::SerialPortError)),this,
            SLOT(onError(QSerialPort::SerialPortError)));

    m_serial->setPortName((serialName));
    m_serial->setBaudRate(baudrate);
    m_serial->setDataBits(QSerialPort::Data8);
    m_serial->setParity(QSerialPort::NoParity);
    m_serial->setStopBits(QSerialPort::OneStop);
    m_serial->setFlowControl(QSerialPort::NoFlowControl);

    if(!m_serial->open(QIODevice::ReadWrite)){
        qCritical() << "Open Serial failed: " << m_serial->errorString();
        return false;
    }

    m_connected = true;
    qDebug() << "QSerialPort connected to " << serialName << "," << baudrate;
    return true;
}
#else
bool SerialPort::openSerialPort(QString serialName, quint32 baudrate, QSerialPort::DataBits dataBits, QSerialPort::StopBits stopbits, QSerialPort::Parity parity, QSerialPort::FlowControl flowControl)
{
    qDebug() << "QSeriaport Attempting connect to " << serialName << "," << baudrate;
    //如果已经打开，先执行关闭操作
    disConnected();

    //记录当前正在使用的串口信息
    m_currentPortName = serialName;
    m_currentBaudRate = QString::number(baudrate);

    //设置串口属性，并且打开
    m_serial = new QSerialPort();
    //connect(m_serial,SIGNAL(readyRead()),this,SLOT(readData));
    connect(m_serial,&QSerialPort::readyRead,this,&SerialPort::readData);
    connect(m_serial,SIGNAL(error(QSerialPort::SerialPortError)),this,
            SLOT(onError(QSerialPort::SerialPortError)));

    m_serial->setPortName((serialName));
    m_serial->setBaudRate(baudrate);
    m_serial->setDataBits(dataBits);
    m_serial->setParity(parity);
    m_serial->setStopBits(stopbits);
    m_serial->setFlowControl(flowControl);
//    if(dataBits == QSerialPort::Data6){
//        qDebug()<<"Data6";
//    }

    if(!m_serial->open(QIODevice::ReadWrite)){
        qCritical() << "Open Serial failed: " << m_serial->errorString();
        return false;
    }

    m_connected = true;
    qDebug() << "QSerialPort connected to " << serialName << "," << baudrate;
    return true;
}
#endif
void SerialPort::disConnected()
{
    m_connected = false;
    if(m_serial != Q_NULLPTR)
    {
        if(m_serial->isOpen()){
            m_serial->close();
        }
        m_serial->deleteLater();
        m_serial = Q_NULLPTR;
        qDebug() << "disconnect from " << m_currentPortName << "," << m_currentBaudRate;
    }
}

bool SerialPort::isConnected()
{
    return m_connected;
}

qint64 SerialPort::writeData(QByteArray &data)
{
    if(m_connected == false)
    {
        return 0;
    }
    //write本身并不保证将数据全部写入，它只返回实际写入的字节数
    qint64 total = data.size(), writed = 0,n = 0;
    while(writed < total)
    {
        if((n = m_serial->write(data.mid(writed))) < 0){
            break;
        }
        writed += n;
    }
    qDebug() << QDateTime::currentMSecsSinceEpoch() << " " << "Serial send: " << writed << "," << CommonUtil::ByteArrayToHexString(data);
    return writed;
}

void SerialPort::readData()
{
   QByteArray ba = m_serial->readAll();
   emit serialReadData(ba);
   //添加协议
   //qDebug() << ba;
}

void SerialPort::onError(QSerialPort::SerialPortError error)
{
    if(error != QSerialPort::NoError)
    {
        qCritical() << "SerialError:" << m_serial->errorString();
    }
}