用qt寫的一個簡單到不能在簡單的上位機

學QT時，寫的一個簡單得不能再簡單的串口上位機，用來控制單片機上的2個LED。假設一個是只有開和關的狀態。一個可以調節亮度。上位機的界面如下圖：

其中，波特率，數據位，停止位下拉值在設計師里面添加。剩下的功能，基本由代碼實現。通信使用的協議也是隨便寫的。很簡單和隨意。圖片是老弟手繪的。

下面貼代碼 (*^__^*) 

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtSerialPort>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    Pic = tr("://Resource/關燈.jpg"); //放置一張圖片
    ui->lightLabel->setPixmap(Pic);

    ui->RTextEdit->setReadOnly(false);
    ui->STextEdit->setReadOnly(false);

    ui->onButton->setEnabled(true); //默認關燈
    ui->offButton->setEnabled(false);
    ui->lightDial->setEnabled(false);

    serial = new QSerialPort(this);
    OpenFlag = false;   //串口未打開

    connect(ui->lightDial, SIGNAL(valueChanged(int)), this, SLOT(on_light_chance()));

    UsartUi();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::UsartUi()  //完善串口配置UI
{
    ui->parityBox->addItem(QStringLiteral("None"),QSerialPort::NoParity);
    ui->parityBox->addItem(QStringLiteral("偶校驗"),QSerialPort::EvenParity);
    ui->parityBox->addItem(QStringLiteral("奇校驗"),QSerialPort::OddParity);
    ui->parityBox->addItem(QStringLiteral("Mark  1"),QSerialPort::MarkParity);
    ui->parityBox->addItem(QStringLiteral("Space 0"),QSerialPort::SpaceParity);

    ui->baundRateBox->setItemData(0,QSerialPort::Baud4800);
    ui->baundRateBox->setItemData(1,QSerialPort::Baud9600);
    ui->baundRateBox->setItemData(2,QSerialPort::Baud19200);
    ui->baundRateBox->setItemData(3,QSerialPort::Baud38400);
    ui->baundRateBox->setItemData(4,QSerialPort::Baud57600);
    ui->baundRateBox->setItemData(5,QSerialPort::Baud115200);

    ui->dataBitBox->setItemData(0,QSerialPort::Data5);
    ui->dataBitBox->setItemData(1,QSerialPort::Data6);
    ui->dataBitBox->setItemData(2,QSerialPort::Data7);
    ui->dataBitBox->setItemData(3,QSerialPort::Data8);

    ui->stopBitBox->setItemData(0,QSerialPort::OneStop);
    ui->stopBitBox->setItemData(1,QSerialPort::OneAndHalfStop);
    ui->stopBitBox->setItemData(2,QSerialPort::TwoStop);

    PortInfo();
}

void MainWindow::PortInfo()
{
    ui->uNameBox->clear();

    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
        QStringList list;
        list << info.portName()
             << info.description()
             << info.manufacturer()
             << info.systemLocation()
             << (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : QString())
             << (info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : QString());

        ui->uNameBox->addItem(list.first(), list);
    }
}

//槽函數
void MainWindow::on_startButton_clicked()   //打開串口
{
    if(!OpenFlag)//執行打開串口
    {

        currentConfig.name = ui->uNameBox->currentText();
        currentConfig.baudRate = static_cast<QSerialPort::BaudRate>
               (ui->baundRateBox->itemData(ui->baundRateBox->currentIndex()).toInt());
        currentConfig.dataBits = static_cast<QSerialPort::DataBits>
               (ui->dataBitBox->itemData(ui->dataBitBox->currentIndex()).toInt());
        currentConfig.stopBits = static_cast<QSerialPort::StopBits>
               (ui->stopBitBox->itemData(ui->stopBitBox->currentIndex()).toInt());
        currentConfig.parity = static_cast<QSerialPort::Parity>
               (ui->parityBox->itemData(ui->parityBox->currentIndex()).toInt());

        serial->setPortName(currentConfig.name);
        if(serial->open(QIODevice::ReadWrite))
        {
            if( serial->setBaudRate(currentConfig.baudRate)
                && serial->setDataBits(currentConfig.dataBits)
                && serial->setStopBits(currentConfig.stopBits)
                && serial->setParity(currentConfig.parity) )
            {
                OpenFlag = true;
                ui->startButton->setText(tr("關閉串口"));
            }
            else
            {
                serial->close();
                OpenFlag = false;
                ui->startButton->setText(tr("打開串口"));
            }
        }
        else
        {
            OpenFlag = false;
            ui->startButton->setText(tr("打開串口"));
        }

    }
    else
    {
        OpenFlag = false;
        ui->startButton->setText(tr("打開串口"));

        serial->close();
    }
/*    ui->STextEdit->setText(tr("校驗位：%1 \n波特率：%2 \n數據位：%3 \n停止位：%4")
                             .arg(ui->parityBox->itemData(ui->parityBox->currentIndex()).toString())
                             .arg(ui->baundRateBox->itemData(ui->baundRateBox->currentIndex()).toString())
                             .arg(ui->dataBitBox->itemData(ui->dataBitBox->currentIndex()).toString())
                             .arg(ui->stopBitBox->itemData(ui->stopBitBox->currentIndex()).toString()));
*/
}

void MainWindow::on_offButton_clicked() //關燈
{
    QByteArray data;
    QString Pdata;
    data.resize(3);
    data[0] = 0xF0;
    data[1] = 0X0F;
    data[2] = 0x80;

    ui->offButton->setEnabled(false);
    ui->onButton->setEnabled(true);

    ui->lightDial->setValue(1);
    ui->lightDial->setEnabled(false);

    Pdata = data.toHex().toUpper();
    int Size = Pdata.size();
    for(int i = Size; i > 0; i--)
    {
        Pdata.insert(i * 2, " ");
    }

    ui->STextEdit->insertPlainText(Pdata);
    //發送數據
    serial->write(data);
}

void MainWindow::on_onButton_clicked()  //開燈  0XF0 0X0F 0X81
{

    QByteArray data;
    QString Pdata;
    data.resize(3);
    data[0] = 0xF0;
    data[1] = 0X0F;
    data[2] = 0X81;

    ui->onButton->setEnabled(false);
    ui->offButton->setEnabled(true);
    ui->lightDial->setEnabled(true);

    Pdata = data.toHex().toUpper();
    int Size = Pdata.size() / 2;
    for(int i = Size; i > 0; i--)
    {
        Pdata.insert(i * 2, " ");
    }

    ui->STextEdit->insertPlainText(Pdata);
    //發送數據
    serial->write(data);
}

void MainWindow::on_light_chance()
{
    QByteArray data;
    QString Pdata;
    data.resize(5);
    data[0] = 0xF0;
    data[1] = 0x0F;
    data[2] = 0xC0;
    data[3] = 0x01;
    data[4] = ui->lightDial->value();

    Pdata = data.toHex().toUpper();
    int Size = Pdata.size() / 2;
    for(int i = Size; i > 0; i--)
    {
        Pdata.insert(i * 2, " ");
    }
    ui->STextEdit->insertPlainText(Pdata);

    serial->write(data);
}

void MainWindow::on_freshButton_clicked()   //刷新狀態
{
    QByteArray Rdata = serial->readAll();
    QString Pdata = Rdata.toHex().toUpper();    //轉換成HEX格式且大寫
    int Size = Pdata.size()/2;
    for(int i = Size; i > 0; i--)   //插入空格 使格式如 xx xx xx
    {
        Pdata.insert(i * 2, " ");
    }
    ui->RTextEdit->insertPlainText(Pdata);
    int i = 0;
    if(Rdata.at(i) && 0xF0 == 0xF0)
    {
        i++;
        if(Rdata.at(i) && 0x0F == 0x0F)
        {
            while(Rdata.at(i) != '\0') //解析指令
            {
                if(Rdata.at(i) && 0x80 == 0x80)currentStatus.lightOnOff = false;
                if(Rdata.at(i) && 0x81 == 0x81)currentStatus.lightOnOff = true;
                if(Rdata.at(i) && 0xc0 == 0xc0)
                {
                    i = i + 2;
                    currentStatus.lightValue = Rdata.at(i);
                }
                i++;
            }
        }
    }
    if(currentStatus.lightOnOff)Pic = tr("://Resource/開燈.jpg");
    else Pic = tr("://Resource/關燈.jpg");
    ui->lightLabel->setPixmap(Pic);
    ui->lightLcdNumber->display(currentStatus.lightValue);
}