Qt5 编写上位机

代码

(1)mainwindow.h

(2)mainwindow.cpp

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QtSerialPort/QSerialPort>

#include <QtSerialPort/QSerialPortInfo>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    foreach(const QSerialPortInfo &info,QSerialPortInfo::availablePorts())

    {

        QSerialPort myserial;

        myserial.setPort(info);

        if(myserial.open(QIODevice::ReadWrite))

        {

            ui->portcomboBox->addItem(myserial.portName());

            myserial.close();

        }

    }

    ui ->baoudcomboBox->setCurrentIndex(5);

    ui->SendDataButton->setEnabled(false);

    QObject::connect(ui->ClearButton,SIGNAL(clicked()),this,SLOT(ClearButton_onclick()));

    QObject::connect(ui->OpenButton,SIGNAL(clicked()),this,SLOT(OpenButton_onclick()));

    QObject::connect(ui->SendDataButton,SIGNAL(clicked()),this,SLOT(SendButton_onclick()));

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::ClearButton_onclick()

{

    ui->textEdit->clear();

}

void MainWindow::SendButton_onclick()

{

    serial->write(ui->textEdit_2->toPlainText().toLatin1());

}

void MainWindow::OpenButton_onclick()

{

    if(ui->OpenButton->text()==tr("串口"))

    {

        serial = new QSerialPort;

        serial->setPortName(ui->portcomboBox->currentText());

        serial->open(QIODevice::ReadWrite);

        serial->setBaudRate(ui->baoudcomboBox->currentText().toInt());

        switch(ui->datacomboBox->currentIndex())

        {

        case 8: serial ->setDataBits(QSerialPort::Data8);

            break;

        default: break;

        }

        switch(ui->checkcomboBox->currentIndex())

        {

        case 0: serial->setParity(QSerialPort::NoParity); break;

        default: break;

        }

        switch(ui->stopcomboBox->currentIndex())

        {

        case 1:serial->setStopBits(QSerialPort::OneStop); break;

        case 2:serial->setStopBits(QSerialPort::TwoStop);break;

        default : break;

        }

        serial->setFlowControl(QSerialPort::NoFlowControl);

        ui->portcomboBox->setEnabled(false);

        ui->baoudcomboBox->setEnabled(false);

        ui->datacomboBox->setEnabled(false);

        ui->checkcomboBox->setEnabled(false);

        ui->stopcomboBox->setEnabled(false);

        ui->OpenButton->setEnabled("关闭串口");

        ui->SendDataButton->setEnabled(true);

        QObject::connect(serial, &QSerialPort::readyRead, this, &MainWindow::Read_Data);

    }

        else

    {

        serial ->clear();

        serial ->close();

        serial ->deleteLater();

        ui->portcomboBox->setEnabled(true);

        ui->baoudcomboBox->setEnabled(true);

        ui->datacomboBox->setEnabled(true);

        ui->checkcomboBox->setEnabled(true);

        ui->stopcomboBox->setEnabled(true);

        ui->OpenButton->setEnabled("关闭串口");

        ui->SendDataButton->setEnabled(false);

    }

}

void MainWindow::Read_Data()

{

    QByteArray buf;

    buf = serial->readAll();

    if(!buf.isEmpty())

    {

        QString str = ui->textEdit->toPlainText();

        str += tr(buf);

        QByteArray str2 = QByteArray::fromHex(str.toLatin1().data());

        QString strDis;

        QString str3 = str2.toHex().data();

        str3 = str3.toUpper();

        for(int i = 0; i<str3.length(); i+=2)

        {

            QString st = str3.mid(i,2);

            strDis += st;

            strDis +="";

        }

        ui ->textEdit->append(strDis);

    }

    buf.clear();

}

(3)  mainwindow.ui

(4)  运行结果

在运行过程中报了很多错，但还是一 一解决了，这上位机很简陋，还在努力学习中，，，，