117 lines
3.0 KiB
C++
117 lines
3.0 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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//构造函数，用于初始化
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MainWindow::MainWindow(QMainWindow *parent) : QMainWindow(parent)
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, ui(new Ui::MainWindow){
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ui->setupUi(this);
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//初始化串口
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serial = new QSerialPort(this);
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initSerialPorts();
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//连接信号与串口
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//是谁，谁发出信息，在哪里，谁接收信号
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connect(serial,&QSerialPort::readyRead,this,&MainWindow::readData);
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}
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//析构函数，释放资源
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MainWindow::~MainWindow()
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{
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if (serial) {
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if (serial->isOpen()) {
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serial->close();
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}
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delete serial;
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serial = nullptr; // 防止悬空指针
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}
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delete ui;
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}
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//更新串口信息
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// *********portComboBox怎么使用***************
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void MainWindow::updateSerialPortsList()
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{
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ui->portComboBox->clear();
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foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
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ui->portComboBox->addItem(info.portName());
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}
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}
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//初始化串口————成员函数
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void MainWindow::initSerialPorts()
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{
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//更新串口信息成员函数，在上面定义
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updateSerialPortsList();
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//设置串口参数初始化
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serial->setBaudRate(QSerialPort::Baud9600);
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serial->setDataBits(QSerialPort::Data8);
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serial->setParity(QSerialPort::NoParity);
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serial->setStopBits(QSerialPort::OneStop);
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serial->setFlowControl(QSerialPort::NoFlowControl);
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}
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//按钮槽函数，QT框架自动实现
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//打开或关闭串口
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void MainWindow::on_openCloseButton_clicked()
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{
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if (serial->isOpen()) {
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serial->close();
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ui->openCloseButton->setText("打开串口");
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statusBar()->showMessage("串口已关闭");
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} else {
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serial->setPortName(ui->portComboBox->currentText());
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if (serial->open(QIODevice::ReadWrite)) {
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ui->openCloseButton->setText("关闭串口");
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statusBar()->showMessage("串口已打开");
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} else {
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QMessageBox::critical(this, "错误", "无法打开串口");
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}
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}
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}
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//发送数据
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void MainWindow::on_sendButton_clicked()
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{
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if (serial->isOpen()) {
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if (serial->isOpen()) {
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QString text = ui->sendTextEdit->toPlainText();
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for (int i = 0; i < text.length(); i++) {
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QByteArray data;
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data.append(QString(text[i]).toUtf8()); // 逐个字符发送
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serial->write(data);
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QThread::msleep(100); // 可选：增加延迟以避免发送过快
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}
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if(serial->flush())
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ui->sendTextEdit->clear();// 确保所有数据发送完成
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} else {
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QMessageBox::warning(this, "警告", "请先打开串口");
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}
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}
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}
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//串口接收数据槽函数
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void MainWindow::readData()
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{
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QByteArray data = serial->readAll();
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ui->receiveTextEdit->appendPlainText(QString::fromUtf8(data));
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}
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