串口温度采集软件课设

#include "mainwindow.h"
#include "ui_mainwindow.h"

///////////////////////////////////////
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->closeMyComBtn->setEnabled(false);   //开始“关闭串口”按钮不可用
    ui->sendMsgBtn->setEnabled(false);     //开始“发送数据”按钮不可用
    ff=0;
    LenChaosheng = 0;
setWindowTitle("数据采集系统                                            ");

helpAction = new QAction(tr("&Information"), this);
Help = menuBar()->addMenu(tr("系统说明")); //创建菜单项
Help->addAction(helpAction);                    //添加动作
connect(helpAction, SIGNAL(triggered()), this, SLOT(help()));


connect(this,SIGNAL(showtemperature()),this,SLOT(showtemp()));//连接信号与槽，更新右边项；
connect(this,SIGNAL(showLength()),this,SLOT(showLen()));//连接信号与槽，更新右边项；

//绘图测试
   // QwtPlotCurve *cSin = new QwtPlotCurve("y = sin(x)");
    QwtPlot * plot = ui->qwtPlot;
    plot->setTitle( "Temperature" );//标题
    plot->setCanvasBackground( Qt::yellow );//背景颜色
    plot->setAxisScale( QwtPlot::yLeft, 0.0, 40 );//纵轴数据范围
    plot->setAxisScale( QwtPlot::xBottom, 0.0, 20 );//横轴数据范围
    plot->insertLegend( new QwtLegend() );  //图例
    plot->setAxisTitle(QwtPlot::yLeft,tr("温度/°C"));
    plot->resize( 550, 350 );
    //添加网格
    QwtPlotGrid *grid = new QwtPlotGrid();
    grid->attach( plot );

//为曲线设置样式
    curve = new QwtPlotCurve();//
      curve2 = new QwtPlotCurve();//
    curve->setTitle( "temperature" );
    curve->setPen( Qt::blue, 1 );
    curve->setRenderHint( QwtPlotItem::RenderAntialiased, true );
//为曲线设置点的样式
    QwtSymbol *symbol = new QwtSymbol( QwtSymbol::Ellipse,
    QBrush( Qt::blue ), QPen( Qt::red, 1 ), QSize( 2, 4 ) );
    curve->setSymbol( symbol );
//为曲线设置数据点
//    QPolygonF points;
//    points << QPointF( 0.0, 4.4 ) << QPointF( 1.0, 3.0 )
//        << QPointF( 2.0, 4.5 ) << QPointF( 3.0, 6.8 )
//        << QPointF( 4.0, 7.9 ) << QPointF( 5.0, 7.1 );
//    curve->setSamples( points );
//
//    curve->attach( plot );

}

MainWindow::~MainWindow()
{
    delete ui;
}
//读取串口槽函数
void MainWindow::readMyCom()//读串口函数
{
    QByteArray temp = myCom->readAll();
    //读取串口缓冲区的所有数据给临时变量temp
    ui->textBrowser->insertPlainText(temp);
    //将串口的数据显示在窗口的文本浏览器中
   // QByteArray* addr  = &temp;

    //解析
    serialData.append(temp.constData());

    serialProcess();
    tempShow();
}
//打开串口
void MainWindow::on_openMyComBtn_clicked()
{
    QString portName = ui->portNameComboBox->currentText(); //获取串口名
    myCom = new Win_QextSerialPort(portName,QextSerialBase::EventDriven);
    //定义串口对象，并传递参数，在构造函数里对其进行初始化
    myCom ->open(QIODevice::ReadWrite); //打开串口

    if(ui->baudRateComboBox->currentText()==tr("9600"))     //根据组合框内容对串口进行设置
        myCom->setBaudRate(BAUD9600);
    else if(ui->baudRateComboBox->currentText()==tr("115200"))
        myCom->setBaudRate(BAUD115200);

    if(ui->dataBitsComboBox->currentText()==tr("8"))
         myCom->setDataBits(DATA_8);
    else if(ui->dataBitsComboBox->currentText()==tr("7"))
        myCom->setDataBits(DATA_7);

    if(ui->parityComboBox->currentText()==tr("无"))
        myCom->setParity(PAR_NONE);
    else if(ui->parityComboBox->currentText()==tr("奇"))
        myCom->setParity(PAR_ODD);
    else if(ui->parityComboBox->currentText()==tr("偶"))
        myCom->setParity(PAR_EVEN);

    if(ui->stopBitsComboBox->currentText()==tr("1"))
        myCom->setStopBits(STOP_1);
    else if(ui->stopBitsComboBox->currentText()==tr("2"))
        myCom->setStopBits(STOP_2);

    myCom->setFlowControl(FLOW_OFF);
    myCom->setTimeout(500);

    connect(myCom,SIGNAL(readyRead()),this,SLOT(readMyCom()));
    //信号和槽函数关联，当串口缓冲区有数据时，进行读串口操作

    ui->openMyComBtn->setEnabled(false);       //打开串口后“打开串口”按钮不可用
    ui->closeMyComBtn->setEnabled(true);     //打开串口后“关闭串口”按钮可用
    ui->sendMsgBtn->setEnabled(true);     //打开串口后“发送数据”按钮可用
    ui->baudRateComboBox->setEnabled(false);  //设置各个组合框不可用
    ui->dataBitsComboBox->setEnabled(false);
    ui->parityComboBox->setEnabled(false);
    ui->stopBitsComboBox->setEnabled(false);
    ui->portNameComboBox->setEnabled(false);
}
//关闭串口
void MainWindow::on_closeMyComBtn_clicked()
{
    myCom->close();
    ui->openMyComBtn->setEnabled(true);       //关闭串口后“打开串口”按钮可用
    ui->closeMyComBtn->setEnabled(false);     //关闭串口后“关闭串口”按钮不可用
    ui->sendMsgBtn->setEnabled(false);        //关闭串口后“发送数据”按钮不可用

    ui->baudRateComboBox->setEnabled(true);     //设置各个组合框可用
    ui->dataBitsComboBox->setEnabled(true);
    ui->parityComboBox->setEnabled(true);
    ui->stopBitsComboBox->setEnabled(true);
    ui->portNameComboBox->setEnabled(true);
}
//串口界面发送数据
void MainWindow::on_sendMsgBtn_clicked()
{
    myCom->write(ui->sendMsgLineEdit->text().toAscii());  //以ASCII码形式将数据写入串口
}

//文本框数据变化后的槽函数
void MainWindow::on_textBrowser_textChanged()
{

}
//串口数据处理
void MainWindow::serialProcess()
{
    qDebug()<<"receive1.";
    qDebug()<<serialData;
   // char * ch="##";
    QByteArray ch;
    ch.append(‘#‘);
    ch.append(‘#‘);
    if(serialData.contains(ch))
    {
            qDebug()<<"receivech";
      //  int i = serialData.count(ch);
        for(;serialData.count(ch)>1;)//读取温度数据包,至少有一个
        {
             qDebug()<<"2222222";
            int ind = serialData.indexOf(ch);  // 第一个ind
            if(ind > 0)//   去除前面的非完整数据
            {
                serialData.remove(0,ind);
            }
        ind = serialData.indexOf(ch);
        int ind2 = serialData.indexOf(ch,ind+2);  //第二个ind
     qDebug()<<"ind "<<ind<<"  "<<ind2;
            if(ind2 - ind >=6)//可能有数据
            {
                ind = serialData.indexOf(ch);

                ind = ind+2;
                unsigned char flag =  serialData.at(ind);

                if(flag == ‘0‘)//表示接收到温度
                {
                    ind ++;
                    int M = (unsigned char)serialData.at(ind);
                    ind ++;
                    int L = (unsigned char)serialData.at(ind);
                    ind ++;
//                    if((unsigned char)serialData.at(ind) == (unsigned char)(~(L + M)) )
//                    {
//                        int t = M*256 + L;
//                        tempList.append(t);//保存温度值
//                    }
                     qreal t = (M*256 + L)*0.0625;
                      qDebug()<<"wendudd"<<t;
                     tempList.append(t);//保存温度值


                }
                if(flag == ‘1‘)
                {
                    ind ++;
                    int M = (unsigned char)serialData.at(ind);
                    ind ++;
                    int L = (unsigned char)serialData.at(ind);
                    ind ++;
                    qreal t = (M*256 + L)*1.87/100.0;
                    qDebug()<<"超声"<<t;
                    LenChaosheng = t;
                    emit showLength();
                       //  tempList.append(t);//保存温度值
                }
            }
            //去除ind到ind2之间的数据
            serialData.remove(ind,ind2-ind);

        }
    }
}

void  MainWindow::tempShow()
{

    if(tempList.size()<1)
        return;

    QwtPlot * plot = ui->qwtPlot;

    //qDebug()<<"tmep"<<tempList<< tempList.size();
    //为曲线设置数据点
    QPolygonF points;
    int size = tempList.size();
    for (int i=0;i<size;i++)
    {
        points<< QPointF( i, tempList.at(i));
    }

    curve->setSamples( points );
    plot->setAxisScale( QwtPlot::yLeft, 0, 40 );//纵轴数据范围
    plot->setAxisScale( QwtPlot::xBottom, 0.0, size );//横轴数据范围
   
    curve->attach( plot );
    plot->replot();
    emit showtemperature();
//显示当前温度
   // ui->lineEdit_currentTemp->setText(QString("1%").arg(tempList.at(size-1)));

}
//显示当前温度
void MainWindow::showtemp()
{
    if(tempList.size()>0)
    {
    ui->lineEdit_currentTemp->setText(QString("%1%2").arg(tempList.at(tempList.size()-1)).arg("°C"));
    }
}

//保存数据至文本文件
void MainWindow::on_pushButton_savedata_clicked()
{
     //保存数据
    QString name = "温度数据";
    //    QTime current_time = QTime::currentTime();
    //    int hour = current_time.hour();
    //int minute = current_time.minute();
    //int second = current_time.second();

    QDateTime current_date_time = QDateTime::currentDateTime();     //获取当前时间
    QString str = current_date_time.toString("yyyy-MM-dd hh-mm-ss");

    name.append(str);
    name.append(".txt");


    QFile file(name);
    if (!file.open(QIODevice::ReadWrite  | QIODevice::Text))
    return;
    QTextStream out(&file);

    out<<"Temprature data save at:"<<str<<endl;

    int size = tempList.size();
    for (int i=0;i<size;i++)
    {
         out<<tempList.at(i)<<endl;
    }

    file.close();

//
//    out << "The magic number is: " << 49 << "\n";
//
    QString str1 = "温度数据成功保存至文件";
    str1.append(name);
    QMessageBox::about(NULL, "保存数据成功",  str1);

}

//保存温度曲线至pdf文件

void MainWindow::on_pushButton_savecurve_clicked()
{
    QwtPlot * plot = ui->qwtPlot;

    QwtPlotRenderer renderer1;
    renderer1.exportTo( plot, "temprature.pdf" );
//    //
//    QPrinter printer( QPrinter::HighResolution );
//    printer.setOrientation( QPrinter::Landscape );
//    printer.setOutputFileName( "wendu.pdf" );
//
//    QPrintDialog dialog( &printer );
//    if ( dialog.exec() )
//    {
//        QwtPlotRenderer renderer;
//
//        if ( printer.colorMode() == QPrinter::GrayScale )
//        {
//            renderer.setDiscardFlag( QwtPlotRenderer::DiscardBackground );
//            renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasBackground );
//            renderer.setDiscardFlag( QwtPlotRenderer::DiscardCanvasFrame );
//            renderer.setLayoutFlag( QwtPlotRenderer::FrameWithScales );
//        }
//
//        renderer.renderTo( ui->qwtPlot, printer );
//    }
}

void MainWindow::on_pushButton_4_clicked()
{


//文件获取对话框
    QString fileName = QFileDialog::getOpenFileName(this,tr("文件对话框"),
    "..",tr("温度文件(*txt)"));          //获取模型文件
    qDebug()<< "fileNames:" << fileName;

    QFile f(fileName);

    if(!f.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        // cout << "Open failed." << endl;
        QErrorMessage dialog(this);
        dialog.setWindowTitle(tr("Erro"));
        dialog.showMessage(tr("文件打开失败！"));
        return ;
    }
    tempLoad.clear();//加载的数据存储在列表中
    QTextStream txtInput(&f);
    QString lineStr;
    while(!txtInput.atEnd())
    {
        lineStr = txtInput.readLine();
         qDebug()<< lineStr;
        if(lineStr.startsWith("T"))
        {
            continue;
        }
        tempLoad.append( lineStr.toDouble());
        qDebug()<< lineStr.toDouble();
        //cout << lineStr << endl;
    }
    f.close();
//加载完毕之后进行显示
    //绘图测试
   // QwtPlotCurve *cSin = new QwtPlotCurve("y = sin(x)");
    QwtPlot * plot = ui->qwtPlot_2;
    plot->setTitle( "Temperature—_Loaded" );//标题
    plot->setCanvasBackground( Qt::yellow );//背景颜色
    plot->setAxisScale( QwtPlot::yLeft, 0.0, 40 );//纵轴数据范围
    plot->setAxisScale( QwtPlot::xBottom, 0.0, 20 );//横轴数据范围
    plot->insertLegend( new QwtLegend() );  //图例
    plot->setAxisTitle(QwtPlot::yLeft,"温度/°C");
   // plot->resize( 400, 250 );
    //添加网格
//   QwtPlotGrid *grid = new QwtPlotGrid();
//   grid->attach( plot );

//为曲线设置样式

   // curve->setTitle( "temperature" );
    curve2->setPen( Qt::blue, 1 );
   // curve2->setRenderHint( QwtPlotItem::RenderAntialiased, true );
//为曲线设置点的样式
   // QwtSymbol *symbol = new QwtSymbol( QwtSymbol::Ellipse,
   // QBrush( Qt::blue ), QPen( Qt::red, 1 ), QSize( 2, 4 ) );
   // curve2->setSymbol( symbol );
//为曲线设置数据点
 //qDebug()<<"tmep"<<tempList<< tempList.size();
    //为曲线设置数据点
    QPolygonF points;
    int size = tempLoad.size();
    for (int i=0;i<size;i++)
    {
        points<< QPointF( i, tempLoad.at(i));
    }

    curve2->setSamples( points );
    plot->setAxisScale( QwtPlot::yLeft, 0, 30 );//纵轴数据范围
    plot->setAxisScale( QwtPlot::xBottom, 0.0, size );//横轴数据范围

    curve2->attach( plot );
    plot->replot();

 //表格绘制 tableWidget

QTableWidget *table = ui->tableWidget;
table->setColumnCount(2);
table->setRowCount(size);
table->setColumnWidth(0,50);

    //设置表格行标题
    QStringList headerLabels;
    headerLabels << "Index" << "Temp data";
    table->setHorizontalHeaderLabels(headerLabels);
    //设置表格行标题的对齐方式
    table->horizontalHeader()->setDefaultAlignment(Qt::AlignLeft);
 //设置表格的内容
    for (int i=0;i<size;i++)
    {
        table->setRowHeight(i, 22);//设置每一行的高度

        table->setItem(i,0,new QTableWidgetItem(QString::number(i+1)));
        table->setItem(i,1,new QTableWidgetItem(QString::number(tempLoad.at(i))+" °C" ));
    }
////设置行表题
//QStringList rowLabels;
//rowLabels << "Line1" << "Line2" << "Line3" << "Line4";
//table->setVerticalHeaderLabels(rowLabels);
    //自动调整最后一列的宽度使它和表格的右边界对齐
    table->horizontalHeader()->setStretchLastSection(true);
    //设置表格的选择方式
    table->setSelectionBehavior(QAbstractItemView::SelectItems);
    //设置编辑方式
    table->setEditTriggers(QAbstractItemView::DoubleClicked);

//查询操作，求平均值、最大值、最小值等
    int currentindex = ui->comboBox->currentIndex();
    if(currentindex == 0)  //平均值
    {   qreal sum = 0;
         for (int i=0;i<size;i++)
        {
            sum+=tempLoad.at(i);
        }
        ui->lineEdit->setText(QString("%1%2").arg(sum/size).arg("°C"));
    }
    if(currentindex == 1)  //平均值
    {   qreal max = tempLoad.at(0);
         for (int i=0;i<size;i++)
        {
           if(tempLoad.at(i) > max)
           {
               max = tempLoad.at(i) ;
           }
        }
        ui->lineEdit->setText(QString("%1%2").arg(max).arg("°C"));
    }
    if(currentindex == 2)  //最小值
    {   qreal min = tempLoad.at(0);
         for (int i=0;i<size;i++)
        {
           if(tempLoad.at(i) < min)
           {
               min = tempLoad.at(i) ;
           }
        }
        ui->lineEdit->setText(QString("%1%2").arg(min).arg("°C"));
    }



}

void MainWindow::on_comboBox_currentIndexChanged(int index)
{
//查询操作，求平均值、最大值、最小值等
      int size = tempLoad.size();
    int currentindex = ui->comboBox->currentIndex();
    if(currentindex == 0)  //平均值
    {   qreal sum = 0;
         for(int i=0;i<size;i++)
        {
            sum+=tempLoad.at(i);
        }
        ui->lineEdit->setText(QString("%1%2").arg(sum/size).arg("°C"));
    }
    if(currentindex == 1)  //平均值
    {   qreal max = tempLoad.at(0);
         for (int i=0;i<size;i++)
        {
           if(tempLoad.at(i) > max)
           {
               max = tempLoad.at(i) ;
           }
        }
        ui->lineEdit->setText(QString("%1%2").arg(max).arg("°C"));
    }
    if(currentindex == 2)  //最小值
    {   qreal min = tempLoad.at(0);
         for (int i=0;i<size;i++)
        {
           if(tempLoad.at(i) < min)
           {
               min = tempLoad.at(i) ;
           }
        }
        ui->lineEdit->setText(QString("%1%2").arg(min).arg("°C"));
    }
}
 void MainWindow::closeEvent(QCloseEvent *event)//关闭窗口前检查
 {

    if( ui->openMyComBtn->isEnabled())
    return;

    QMessageBox::StandardButton button;
    button = QMessageBox::question(this, tr("退出程序"),
        QString(tr("串口未断开连接，是否结束操作退出?")),
      QMessageBox::Yes|  QMessageBox::No);
    //QMessageBox::Yes | QMessageBox::No);

    if (button == QMessageBox::No) {
        event->ignore();  //忽略退出信号，程序继续运行
    }
    else if (button == QMessageBox::Yes) {
         event->ignore();  //忽略退出信号，程序继续运行
        //event->accept();  //接受退出信号，程序退出
    }

 }


void MainWindow::on_pushButton_control_clicked()
{
    char a[] = "1";
        myCom->write(a);  //以ASCII码形式将数据写入串口

}

void MainWindow::help()   //帮助菜单的动作响应槽函数
{
    QString local_path = QString("Information.txt"); //a.txt、a.exe、a.mp3、a.mp4、a.rmvb等
 // QString path = QString("file:///") + local_path;
  QDesktopServices::openUrl(QUrl(local_path, QUrl::TolerantMode)); //打开帮助文档
}
//显示当前温度
void MainWindow::showLen()
{
    if(LenChaosheng >0)
    {
    ui->lineEdit_chaosheng->setText(QString("%1%2").arg( LenChaosheng).arg(" CM"));
    }
}