串口发送数据从TextEdit的编辑框中，读取16进值发送至串口。

// 发送信息

void MainWindow::on_SendMessageButton_clicked()

{

    QString sdata= ui->SendDatatextEdit->toPlainText();//读取文本数据

    if(sdata.isEmpty())return;

    QByteArray sendBuf = "";

    sendBuf = QByteArray::fromHex(sdata.toLatin1().data());

    serial->write(sendBuf);

}

就是这样子，用LineEdit替换不行，它只能发送字符。


MainWindow.cpp

#include "mainwindow.h"

#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    ui->FindAvailablePorts->setEnabled(1);

    ui->OpenSerialPortButton->setEnabled(0);

    ui->CloseSerialPortButton->setEnabled(0);

    ui->SendMessageButton->setEnabled(0);

}

MainWindow::~MainWindow()

{

    delete ui;

}

// Test

void MainWindow::on_pushButton_clicked()

{

       alarm* open_alarm = new alarm;

       open_alarm->show();

       DriveTest* open_drivetest = new DriveTest;

       open_drivetest->show();

       Easy_model* open_easymodel = new Easy_model;

       open_easymodel->show();

       login* open_login = new login;

       open_login->show();

       parameter* open_parameter = new parameter;

       open_parameter->show();

       status* open_staus = new status;

       open_staus->show();

       StepData* open_stepdata = new StepData;

       open_stepdata->show();

       teaching* open_teaching = new teaching;

       open_teaching->show();

       //*****************************************

}

// 查找可用串口

void MainWindow::on_FindAvailablePorts_clicked()

{

    ui->PortBox->clear();//清掉上一次的,避免重复。

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

    {

        QSerialPort serial;

        serial.setPort(info);

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

        {

            ui->PortBox->addItem(serial.portName());

            serial.close();

        }

    }

    ui->OpenSerialPortButton->setEnabled(1);

}

// 打开串口

void MainWindow::on_OpenSerialPortButton_clicked()

{

    serial = new QSerialPort;

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

    serial->setBaudRate(QSerialPort::Baud9600);

    serial->setDataBits(QSerialPort::Data8);

    serial->setParity(QSerialPort::NoParity);

    serial->setStopBits(QSerialPort::OneStop);

    serial->setFlowControl(QSerialPort::NoFlowControl);

    serial->open(QIODevice::ReadWrite);

    connect(serial,SIGNAL(readyRead()),this,SLOT(ReadMySerialPortMessage()));

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

    ui->OpenSerialPortButton->setEnabled(0);

    ui->CloseSerialPortButton->setEnabled(1);

    ui->FindAvailablePorts->setEnabled(0);

    ui->SendMessageButton->setEnabled(1);

}

// 接收信息 并 显示

void MainWindow::ReadMySerialPortMessage()

{

    QByteArray buf;

    buf = serial->readAll();

    if(!buf.isEmpty())

    {

        /*字符显示*/

        /*

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

         str+=tr(buf);

         ui->textEdit->clear();

         ui->textEdit->append(str);

        */

        /*十六进制显示*/

         ui->textEdit->insertPlainText(buf.toHex());

         ui->textEdit->insertPlainText("\r\n");

         ui->textEdit->moveCursor(QTextCursor::End);

    }

    buf.clear();

}

// 关闭串口

void MainWindow::on_CloseSerialPortButton_clicked()

{

    serial->close();

    ui->OpenSerialPortButton->setEnabled(1);

    ui->CloseSerialPortButton->setEnabled(0);

    ui->FindAvailablePorts->setEnabled(1);

    ui->SendMessageButton->setEnabled(0);

}

// 发送信息

void MainWindow::on_SendMessageButton_clicked()

{

    QString sdata= ui->SendDatatextEdit->toPlainText();//读取文本数据

    if(sdata.isEmpty())return;

    QByteArray sendBuf = "";

    sendBuf = QByteArray::fromHex(sdata.toLatin1().data());

    serial->write(sendBuf);

}



Mainwindow.h

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include "alarm/alarm.h"

#include "drivetest/drivetest.h"

#include "easymodel/easy_model.h"

#include "login/login.h"

#include "parameter/parameter.h"

#include "status/status.h"

#include "stepdata/stepdata.h"

#include "teaching/teaching.h"

#include "QSerialPort"

#include "QSerialPortInfo"

#include "QDebug"

#include "QString"

#include "QArrayData"

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    explicit MainWindow(QWidget *parent = 0);

    ~MainWindow();

    QSerialPort *serial; //全局变量

    void ReadMySerialPortMessage();

private slots:

    void on_pushButton_clicked();

    void on_FindAvailablePorts_clicked(); //查找串口

    void on_OpenSerialPortButton_clicked();//打开串口

    void on_CloseSerialPortButton_clicked();//关闭串口

    void on_SendMessageButton_clicked();//发送按钮

private:

    Ui::MainWindow *ui;

};

#endif // MAINWINDOW_H



.Pro

#-------------------------------------------------

#

# Project created by QtCreator 2019-05-21T11:00:56

#

#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = ACTController

TEMPLATE = app

# The following define makes your compiler emit warnings if you use

# any feature of Qt which as been marked as deprecated (the exact warnings

# depend on your compiler). Please consult the documentation of the

# deprecated API in order to know how to port your code away from it.

DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.

# In order to do so, uncomment the following line.

# You can also select to disable deprecated APIs only up to a certain version of Qt.

#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += main.cpp\

        mainwindow.cpp \

    alarm/alarm.cpp \

    drivetest/drivetest.cpp \

    easymodel/easy_model.cpp \

    login/login.cpp \

    parameter/parameter.cpp \

    status/status.cpp \

    stepdata/stepdata.cpp \

    teaching/teaching.cpp

HEADERS  += mainwindow.h \

    alarm/alarm.h \

    drivetest/drivetest.h \

    easymodel/easy_model.h \

    login/login.h \

    parameter/parameter.h \

    status/status.h \

    stepdata/stepdata.h \

    teaching/teaching.h

FORMS    += mainwindow.ui \

    alarm/alarm.ui \

    drivetest/drivetest.ui \

    easymodel/easy_model.ui \

    login/login.ui \

    parameter/parameter.ui \

    status/status.ui \

    stepdata/stepdata.ui \

    teaching/teaching.ui

QT += serialport #串口控件