Qt串口通信模块QSerialPort简单串口实例
main.cpp代码
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindows.h代码参考如下：
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialPortInfo>
#include <QList>
#include <QDebug>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void on_btn_openConsole_clicked();
void on_btn_send_clicked();
void on_btn_clearRecv_clicked();
void on_btn_clearSend_clicked();
void readData();
private:
Ui::MainWindow *ui;
QSerialPort *serial;
};
#endif // MAINWINDOW_H
mainwindows.cpp代码
#include "mainwindow.h"
#include "ui_mainwindow.h"
static const char blankString[] = QT_TRANSLATE_NOOP("SettingsDialog", "N/A");
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
serial = new QSerialPort;
QString description;
QString manufacturer;
QString serialNumber;
//获取可以用的串口
QList<QSerialPortInfo> serialPortInfos = QSerialPortInfo::availablePorts();
//输出当前系统可以使用的串口个数
qDebug() << "Total numbers of ports: " << serialPortInfos.count();
//将所有可以使用的串口设备添加到ComboBox中
for (const QSerialPortInfo &serialPortInfo : serialPortInfos)
{
QStringList list;
description = serialPortInfo.description();
manufacturer = serialPortInfo.manufacturer();
serialNumber = serialPortInfo.serialNumber();
list << serialPortInfo.portName()
<< (!description.isEmpty() ? description : blankString)
<< (!manufacturer.isEmpty() ? manufacturer : blankString)
<< (!serialNumber.isEmpty() ? serialNumber : blankString)
<< serialPortInfo.systemLocation()
<< (serialPortInfo.vendorIdentifier() ? QString::number(serialPortInfo.vendorIdentifier(), 16) : blankString)
<< (serialPortInfo.productIdentifier() ? QString::number(serialPortInfo.productIdentifier(), 16) : blankString);
ui->comboBox_serialPort->addItem(list.first(), list);
}
ui->comboBox_serialPort->addItem(tr("custom"));
//设置波特率
ui->comboBox_baudRate->addItem(QStringLiteral("9600"), QSerialPort::Baud9600);
ui->comboBox_baudRate->addItem(QStringLiteral("19200"), QSerialPort::Baud19200);
ui->comboBox_baudRate->addItem(QStringLiteral("38400"), QSerialPort::Baud38400);
ui->comboBox_baudRate->addItem(QStringLiteral("115200"), QSerialPort::Baud115200);
ui->comboBox_baudRate->addItem(tr("Custom"));
//设置数据位
ui->comboBox_dataBits->addItem(QStringLiteral("5"), QSerialPort::Data5);
ui->comboBox_dataBits->addItem(QStringLiteral("6"), QSerialPort::Data6);
ui->comboBox_dataBits->addItem(QStringLiteral("7"), QSerialPort::Data7);
ui->comboBox_dataBits->addItem(QStringLiteral("8"), QSerialPort::Data8);
ui->comboBox_dataBits->setCurrentIndex(3);
//设置奇偶校验位
ui->comboBox_parity->addItem(tr("None"), QSerialPort::NoParity);
ui->comboBox_parity->addItem(tr("Even"), QSerialPort::EvenParity);
ui->comboBox_parity->addItem(tr("Odd"), QSerialPort::OddParity);
ui->comboBox_parity->addItem(tr("Mark"), QSerialPort::MarkParity);
ui->comboBox_parity->addItem(tr("Space"), QSerialPort::SpaceParity);
//设置停止位
ui->comboBox_stopBit->addItem(QStringLiteral("1"), QSerialPort::OneStop);
ui->comboBox_stopBit->addItem(QStringLiteral("2"), QSerialPort::TwoStop);
//添加流控
ui->comboBox_flowBit->addItem(tr("None"), QSerialPort::NoFlowControl);
ui->comboBox_flowBit->addItem(tr("RTS/CTS"), QSerialPort::HardwareControl);
ui->comboBox_flowBit->addItem(tr("XON/XOFF"), QSerialPort::SoftwareControl);
//禁用发送按钮
ui->btn_send->setEnabled(false);
}
MainWindow::~MainWindow()
{
//delete serial;
delete ui;
}
//打开串口按钮槽函数
void MainWindow::on_btn_openConsole_clicked()
{
qDebug() << ui->btn_openConsole->text();
if (ui->btn_openConsole->text() == tr("打开串口"))
{
//设置串口名字
serial->setPortName(ui->comboBox_serialPort->currentText());
//设置波特率
serial->setBaudRate(ui->comboBox_baudRate->currentText().toInt());
//设置数据位
serial->setDataBits(QSerialPort::Data8);
//设置奇偶校验位
serial->setParity(QSerialPort::NoParity);
//设置停止位
serial->setStopBits(QSerialPort::OneStop);
//设置流控
serial->setFlowControl(QSerialPort::NoFlowControl);
//打开串口
if (serial->open(QIODevice::ReadWrite))
{
ui->comboBox_baudRate->setEnabled(false);
ui->comboBox_dataBits->setEnabled(false);
ui->comboBox_flowBit->setEnabled(false);
ui->comboBox_parity->setEnabled(false);
ui->comboBox_serialPort->setEnabled(false);
ui->comboBox_stopBit->setEnabled(false);
ui->btn_send->setEnabled(true);
ui->btn_openConsole->setText(tr("关闭串口"));
//信号与槽函数关联
connect(serial, &QSerialPort::readyRead, this, &MainWindow::readData);
}
}
else
{
//关闭串口
//serial->clear();
serial->close();
//serial->deleteLater();
//恢复设置功能
ui->comboBox_baudRate->setEnabled(true);
ui->comboBox_dataBits->setEnabled(true);
ui->comboBox_flowBit->setEnabled(true);
ui->comboBox_parity->setEnabled(true);
ui->comboBox_serialPort->setEnabled(true);
ui->comboBox_stopBit->setEnabled(true);
ui->btn_openConsole->setText(tr("打开串口"));
ui->btn_send->setEnabled(false);
}
}
//发送数据槽函数
void MainWindow::on_btn_send_clicked()
{
serial->write(ui->textEdit_send->toPlainText().toLatin1());
}
//清空接收数据槽函数
void MainWindow::on_btn_clearRecv_clicked()
{
ui->textEdit_recv->clear();
}
//清空发送区槽函数
void MainWindow::on_btn_clearSend_clicked()
{
ui->textEdit_send->clear();
}
void MainWindow::readData()
{
QByteArray buf;
qDebug() << "readData: " << endl;
buf = serial->readAll();
if (!buf.isEmpty())
{
QString str = ui->textEdit_recv->toPlainText();
str += tr(buf);
ui->textEdit_recv->clear();
ui->textEdit_recv->append(str);
}
}
