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CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(SerialPort VERSION 0.1 LANGUAGES CXX)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets SerialPort)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets SerialPort)

set(PROJECT_SOURCES
        main.cpp
        mainwindow.cpp
        mainwindow.h
        mainwindow.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(SerialPort
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET SerialPort APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
    if(ANDROID)
        add_library(SerialPort SHARED
            ${PROJECT_SOURCES}
        )
# Define properties for Android with Qt 5 after find_package() calls as:
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
    else()
        add_executable(SerialPort
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(SerialPort PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt6::SerialPort)

# Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.
# If you are developing for iOS or macOS you should consider setting an
# explicit, fixed bundle identifier manually though.
if(${QT_VERSION} VERSION_LESS 6.1.0)
  set(BUNDLE_ID_OPTION MACOSX_BUNDLE_GUI_IDENTIFIER com.example.SerialPort)
endif()
set_target_properties(SerialPort PROPERTIES
    ${BUNDLE_ID_OPTION}
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

include(GNUInstallDirs)
install(TARGETS SerialPort
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(SerialPort)
endif()

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QWidget>
#include <QSerialPort>
#include <QTimer>

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE

class MainWindow : public QWidget
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    void init();


private slots:

    void on_openPortBtn_released();

    void on_sendBtn_released();

    void onReadyRead();

    void on_openFileBtn_released();

    void on_sendFileBtn_released();

    void on_hexDisplayChx_toggled(bool checked);

    void on_timerSendChx_toggled(bool checked);



    void on_sendStopBtn_released();

private:
    void displayHex();
    void displayText();

    Ui::MainWindow *ui;
    QSerialPort serialPort_;
    QTimer timer_;
};
#endif // MAINWINDOW_H

main.cpp

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

mainwindow.cpp

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

#include <QSerialPortInfo>
#include <QMessageBox>
#include <QFileDialog>
#include <QStandardPaths>
#include <QFile>

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

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

void MainWindow::init()
{
    //设置改变
    connect(ui->baudRateCmb,&QComboBox::currentIndexChanged,this,[=]
            {
                auto br= ui->baudRateCmb->currentData().value<QSerialPort::BaudRate>();
                if(!serialPort_.setBaudRate(br))
                {
                    QMessageBox::warning(this,"Setting false","设置波特率失败："+serialPort_.errorString());
                }
            });

    connect(ui->dataBitsCmb,&QComboBox::currentIndexChanged,this,[=]
            {
                auto value= ui->baudRateCmb->currentData().value<QSerialPort::DataBits>();
                if(!serialPort_.setDataBits(value))
                {
                    QMessageBox::warning(this,"Setting false","设置数据位失败："+serialPort_.errorString());
                }
            });

    connect(ui->stopBitsCmb,&QComboBox::currentIndexChanged,this,[=]
            {
                auto value= ui->stopBitsCmb->currentData().value<QSerialPort::StopBits>();
                if(!serialPort_.setStopBits(value))
                {
                    QMessageBox::warning(this,"Setting false","设置停止位失败："+serialPort_.errorString());
                }
            });

    connect(ui->parityCmb,&QComboBox::currentIndexChanged,this,[=]
            {
                auto value= ui->parityCmb->currentData().value<QSerialPort::Parity>();
                if(!serialPort_.setParity(value))
                {
                    QMessageBox::warning(this,"Setting false","设置校验位失败："+serialPort_.errorString());
                }
            });
    //获取所有的可用的串口
    auto portsInfo=QSerialPortInfo::availablePorts();
    for(auto& info : portsInfo)
    {
        qInfo()<<info.description()<<info.portName()<<info.systemLocation();
        ui->portsCmb->addItem(info.portName()+":"+info.description(),info.portName());
    }
    //获取标准的波特率
    auto baudRates=QSerialPortInfo::standardBaudRates();
    for(auto br : baudRates)
    {
        ui->baudRateCmb->addItem(QString::number(br),br) ;
    }
    ui->baudRateCmb->setCurrentText("115200");
    //设置停止位
    ui->stopBitsCmb->addItem("1",QSerialPort::OneStop);
    ui->stopBitsCmb->addItem("1.5",QSerialPort::OneAndHalfStop);
    ui->stopBitsCmb->addItem("2",QSerialPort::TwoStop);
    //设置数据位
    ui->dataBitsCmb->addItem("5Bit",QSerialPort::Data5);
    ui->dataBitsCmb->addItem("6Bit",QSerialPort::Data6);
    ui->dataBitsCmb->addItem("7Bit",QSerialPort::Data7);
    ui->dataBitsCmb->addItem("8Bit",QSerialPort::Data8);
    ui->dataBitsCmb->setCurrentText("8Bit");
    //设置校验位
    ui->parityCmb->addItem( "无校验",QSerialPort::NoParity   );
    ui->parityCmb->addItem( "偶校验",QSerialPort::EvenParity );
    ui->parityCmb->addItem( "奇校验",QSerialPort::OddParity  );
    ui->parityCmb->addItem( "校验为0",QSerialPort::SpaceParity);
    ui->parityCmb->addItem( "校验为1",QSerialPort::MarkParity );

    connect(&serialPort_,&QSerialPort::readyRead,this,&MainWindow::onReadyRead);
    timer_.callOnTimeout([=]
     {
         this->on_sendBtn_released();//调用发送函数
     });


}



void MainWindow::on_openPortBtn_released()
{
   //判断串口是否已经打开，如果已经打开点击则关闭串口，并让按钮显示为打开串口
    if(serialPort_.isOpen())
    {
        serialPort_.close();
        ui->openPortBtn->setText("打开串口");
        if(timer_.isActive())
            timer_.stop();
        return;
    }
    //获取串口名
    auto portName = ui->portsCmb->currentData().toString();
    //获取波特率
    auto baudRate = ui->baudRateCmb->currentData().value<QSerialPort::BaudRate>();
    //获取数据位
    auto dataBits = ui->dataBitsCmb->currentData().value<QSerialPort::DataBits>();
    //获取停止位
    auto stopBits = ui->stopBitsCmb->currentData().value<QSerialPort::StopBits>();
    //获取校验位
    auto parity = ui->parityCmb->currentData().value<QSerialPort::Parity>();
    //设置串口
    serialPort_.setPortName(portName);
    serialPort_.setBaudRate(baudRate);
    serialPort_.setDataBits(dataBits);
    serialPort_.setStopBits(stopBits);
    serialPort_.setParity(parity);
    //打开串口
    if(!serialPort_.open(QIODevice::ReadWrite))
    {
        QMessageBox::warning(this,"warning",portName+"打开失败："+serialPort_.errorString());
        return;
    }
    else
    {
        ui->openPortBtn->setText("关闭串口");
    }


}

//发送
void MainWindow::on_sendBtn_released()
{
    auto dataStr = ui->sendEdit->toPlainText() +( ui->sendNewLineChx->isChecked() ?"\r\n":"");//判断是否发送新行
    serialPort_.write(dataStr.toLocal8Bit());
}
//读取
void MainWindow::onReadyRead()
{
   auto data= serialPort_.readAll();
   ui->recvEdit->setPlainText(QString::fromLocal8Bit(data));
}

//打开文件
void MainWindow::on_openFileBtn_released()
{
    auto filename = QFileDialog::getOpenFileName(this,"选择文件",QStandardPaths::writableLocation(QStandardPaths::DesktopLocation),"txt(*.txt);;all(*.*)");
    if(!filename.isEmpty())
    {
        ui->fileNameEdit->setText(filename);
    }
}

//发送文件
void MainWindow::on_sendFileBtn_released()
{
    auto filename=ui->fileNameEdit->text();
    QFile file(filename);
    if(!file.open(QIODevice::ReadOnly))
    {
        QMessageBox::warning(this,"warning",filename+"打开失败："+file.errorString());
        return;
    }
     serialPort_.write(file.readAll());//serialPort_.write(QString::fromUtf8(file.readAll()).toLocal8Bit());//非UTF8编码
}
//显示16进制
void MainWindow::displayHex()
{
//先取出数据
    auto dataStr=ui->recvEdit->toPlainText();
//转成16进制
    auto hexData =dataStr.toLocal8Bit().toHex(' ').toUpper();
//再写回去
    ui->recvEdit->setPlainText(hexData);
}
//显示文本
void MainWindow::displayText()
{
    //先取出数据
    auto dataStr =ui->recvEdit->toPlainText();
    //转成16进制
    auto textData =QString::fromLocal8Bit(dataStr.toLocal8Bit());
    //再写回去
    ui->recvEdit->setPlainText(textData);

}
//显示16进制开关
void MainWindow::on_hexDisplayChx_toggled(bool checked)
{
    if(checked)
        displayHex();
    else
        displayText();

}


void MainWindow::on_timerSendChx_toggled(bool checked)
{
    if(checked)
    {

        timer_.start(ui->timerPeriodEdit->text().toUInt());//开启定时器
        ui->timerPeriodEdit->setEnabled(false);
    }
    else
    {
        timer_.stop();
        ui->timerPeriodEdit->setEnabled(true);
    }

}


void MainWindow::on_sendStopBtn_released()
{
    serialPort_.clear();
    if(timer_.isActive())
        timer_.stop();
}

mainwindow.ui