[C++知识库]Qt(X):串口编程

接受框：plain text edit设置为只读

设置下拉框的内容combox

双击框框就可以编辑
设置默认选项：currentIndex

改变pro文件

QT       += core gui serialport

代码

widget.cpp

#include "widget.h"
#include "ui_widget.h"
#include <QSerialPortInfo>
#include <QMessageBox>

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
    QStringList serialNamePort;

    serialPort = new QSerialPort(this);
    connect(serialPort,SIGNAL(readyRead()),this,SLOT( serialPortReadyRead_slot()));
    foreach (const QSerialPortInfo &info,QSerialPortInfo::availablePorts()) {
        serialNamePort<<info.portName();
    }
    ui->serNumber->addItems(serialNamePort);//显示当前的串口号
}

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

void Widget::serialPortReadyRead_slot(){
    QString buf;
    buf =  QString (serialPort->readAll());
    ui->receivebox->appendPlainText(buf);
}

void Widget::on_openbt_clicked()
{
    QSerialPort::BaudRate baudRate;
    QSerialPort::DataBits databits;
    QSerialPort::Parity parity;
    QSerialPort::StopBits stopbits;


    if(ui->bodrate->currentText()=="4800"){
        baudRate = QSerialPort::Baud4800;
    }else if(ui->bodrate->currentText()=="9600"){
        baudRate= QSerialPort::Baud9600;
    }else if(ui->bodrate->currentText()=="115200"){
        baudRate=QSerialPort::Baud115200;
    }


    if(ui->databit->currentText()=="5"){
        databits = QSerialPort::Data5;
    }else  if(ui->databit->currentText()=="6"){
        databits = QSerialPort::Data6;
    }else  if(ui->databit->currentText()=="7"){
        databits = QSerialPort::Data7;
    }else  if(ui->databit->currentText()=="8"){
        databits = QSerialPort::Data8;
    }

    if(ui->stopbit->currentText()=="1"){
        stopbits=QSerialPort::OneStop;
    }else  if(ui->stopbit->currentText()=="1.5"){
        stopbits=QSerialPort::OneAndHalfStop;
    }else if(ui->stopbit->currentText()=="2"){
        stopbits=QSerialPort::TwoStop;
    }

    if(ui->checkbit->currentText()=="none"){
        parity = QSerialPort::NoParity;
    }

    serialPort->setPortName(ui->serNumber->currentText());
    serialPort->setBaudRate(baudRate);
    serialPort->setDataBits(databits);
    serialPort->setStopBits(stopbits);
    serialPort->setParity(parity);

    if(serialPort->open(QIODevice::ReadWrite)==true){
        QMessageBox::information(this,"提示","成功");
    }else{
         QMessageBox::critical(this,"提示","失败");
    }


}

void Widget::on_closebt_clicked()
{
    serialPort->close();
}

void Widget::on_sendbt_clicked()
{
    serialPort->write(ui->sendbox->text().toLocal8Bit().data());
}

void Widget::on_clearbt_clicked()
{
    ui->receivebox->clear();
}

main.cpp

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QSerialPort>
#include <QString>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();
    QSerialPort *serialPort;

private slots:
    void on_openbt_clicked();

    void on_closebt_clicked();

    void serialPortReadyRead_slot();

    void on_sendbt_clicked();

    void on_clearbt_clicked();

private:
    Ui::Widget *ui;
};

#endif // WIDGET_H