QT5串口通信例程,很好的

#include "dialog.h" #include "ui_dialog.h" Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); timer = new QTimer(this); connect(timer, SIGNAL(timeout()),this,SLOT(slotSendData())); QSerialPortInfo info; serialPort = new QSerialPort(this); foreach(info, QSerialPortInfo::availablePorts())//const QSerialPortInfo &info { serialPort->setPort(info); if (serialPort->open(QIODevice::ReadWrite)) { ui->comboBoxCom->addItem(info.portName()); ui->textEditInfo->append(QStringLiteral("检测到端口列表")); ui->textEditInfo->append(info.portName()); ui->textEditInfo->append(info.description()); ui->textEditInfo->append(info.manufacturer()); serialPort->close(); } } connect(serialPort, SIGNAL(readyRead()), this, SLOT(slotReadData())); ui->comboBoxBaudRate->setCurrentIndex(0); ui->pushButtonStart->setEnabled(false); ui->pushButtonStop->setEnabled(false); ui->pushButtonCloseCom->setEnabled(false); } Dialog::~Dialog() { if (timer->isActive()) { timer->stop(); } delete ui; } void Dialog::on_pushButtonOpenCom_clicked() { serialPort->setPortName(ui->comboBoxCom->currentText()); serialPort->open(QIODevice::ReadWrite); serialPort->setBaudRate(ui->comboBoxBaudRate->currentText().toInt()); serialPort->setDataBits(QSerialPort::Data8); serialPort->setParity(QSerialPort::NoParity); serialPort->setStopBits(QSerialPort::OneStop); serialPort->setFlowControl(QSerialPort::NoFlowControl); ui->pushButtonOpenCom->setEnabled(false); ui->pushButtonCloseCom->setEnabled(true); ui->pushButtonStart->setEnabled(true); ui->pushButtonStop->setEnabled(true); } void Dialog::on_pushButtonCloseCom_clicked() { if (serialPort->isOpen()) { serialPort->close(); ui->pushButtonOpenCom->setEnabled(true); ui->pushButtonCloseCom->setEnabled(false); ui->pushButtonStart->setEnabled(false); ui->pushButtonStop->setEnabled(false); } } void Dialog::on_pushButtonStart_clicked() { timer->start(1000);//能发多快就发多快 } void Dialog::on_pushButtonStop_clicked() { if (timer->isActive()) { timer->stop(); } } void Dialog::slotSendData() { QByteArray temp; temp.append(getCurrentTime()); temp.append("#"); serialPort->write(temp); } QString Dialog::getCurrentTime() { QDateTime dateTime = QDateTime::currentDateTime(); return dateTime.toString("hh-mm-ss-zzz"); } QString str; void Dialog::slotReadData() { QByteArray temp = serialPort->readAll(); if (!temp.isEmpty()) { //byteArray.append(temp); //if (byteArray.contains("#")) { str+=tr(temp);//累加接收的数据 ui->textEditReceive->append(str);//附加str字符串值 // ui->textEditReceive->setText(byteArray.split('#').at(0)); // byteArray = byteArray.right(byteArray.length() - byteArray.indexOf('#') - 1); } } }