Qt_SerialPort.zip

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QMessageBox> #include <QDebug> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); //发送按键失能 ui->pushButton_serial_send->setEnabled(false); //波特率默认选择下拉第三项：115200 ui->Box_baudrate->setCurrentIndex(4); ui->checkBox_hex_display->setCheckState(Qt::Checked); ui->checkBox_hex_display->setEnabled(false); //连接信号和槽 QObject::connect(&serial, &QSerialPort::readyRead, this, &MainWindow::serialPort_readyRead); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_Button_detect_clicked() { ui->Box_portnum->clear(); //通过QSerialPortInfo查找可用串口 foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) { ui->Box_portnum->addItem(info.portName()); } } void MainWindow::on_Button_OpenPort_clicked() { if(ui->Button_OpenPort->text()==QString("打开串口")) { //设置串口名 serial.setPortName(ui->Box_portnum->currentText()); //设置波特率 serial.setBaudRate(ui->Box_baudrate->currentText().toInt()); //设置数据位数 switch(ui->Box_dataBits->currentIndex()) { case 8: serial.setDataBits(QSerialPort::Data8); break; default: break; } //设置奇偶校验 switch(ui->Box_Parity->currentIndex()) { case 0: serial.setParity(QSerialPort::NoParity); break; default: break; } //设置停止位 switch(ui->Box_stopBits->currentIndex()) { case 1: serial.setStopBits(QSerialPort::OneStop); break; case 2: serial.setStopBits(QSerialPort::TwoStop); break; default: break; } //设置流控制 serial.setFlowControl(QSerialPort::NoFlowControl); //打开串口 if(!serial.open(QIODevice::ReadWrite)) { QMessageBox::about(NULL, "提示", "无法打开串口！"); return; } //下拉菜单控件失能 ui->Box_portnum->setEnabled(false); ui->Box_baudrate->setEnabled(false); ui->Box_dataBits->setEnabled(false); ui->Box_Parity->setEnabled(false); ui->Box_stopBits->setEnabled(false); ui->Button_OpenPort->setText(QString("关闭串口")); //发送按键使能 ui->pushButton_serial_send->setEnabled(true); } else { //关闭串口 serial.close(); //下拉菜单控件使能 ui->Box_portnum->setEnabled(true); ui->Box_baudrate->setEnabled(true); ui->Box_dataBits->setEnabled(true); ui->Box_Parity->setEnabled(true); ui->Box_stopBits->setEnabled(true); ui->Button_OpenPort->setText(QString("打开串口")); //发送按键失能 ui->pushButton_serial_send->setEnabled(false); } } void MainWindow::on_pushButton_clear_rev_clicked() { ui->textEdit_receive->clear(); } void MainWindow::on_pushButton_clear_send_clicked() { ui->textEdit_send->clear(); } void MainWindow::on_checkBox_hex_display_clicked(bool checked) { if(checked == true) { } else { } } void MainWindow::on_checkBox_hex_send_clicked(bool checked) { if(checked == true) { } else { } } void MainWindow::on_pushButton_serial_send_clicked() { //获取界面上的数据并转换成utf8格式的字节流 QByteArray data; if(ui->checkBox_hex_send->isChecked() == true) data = HexStringToByteArray(ui->textEdit_send->toPlainText()); else data = ui->textEdit_send->toPlainText().toUtf8(); serial.write(data); /*也可以定长发送*/ //serial.write((const char *)param_data, 16); } void MainWindow::serialPort_readyRead() { //从接收缓冲区中读取数据 QByteArray buffer = serial.readAll(); //将16进制 QString display_str = ByteArrayToHexString(buffer); //从界面中读取以前收到的数据 QString recv = ui->textEdit_receive->toPlainText(); recv += QString(display_str); //清空以前的显示 ui->textEdit_receive->clear(); //重新显示 ui->textEdit_receive->append(recv); } /* * @breif 将16进制字符串转换为对应的字节序列 */ QByteArray MainWindow::HexStringToByteArray(QString HexString) { bool ok; QByteArray ret; HexString = HexString.trimmed(); HexString = HexString.simplified(); QStringList sl = HexString.split(" "); foreach (QString s, sl) { if(!s.isEmpty()) { char c = s.toInt(&ok,16)&0xFF; if(ok){ ret.append(c); }else{ qDebug()<<"非法的16进制字符："<<s; QMessageBox::warning(0,tr("错误："),QString("非法的16进制字符: \"%1\"").arg(s)); } } } //qDebug()<<ret; return ret; } /* * @breif 将字节序列转换为对应的16进制字符串 */ QString MainWindow::ByteArrayToHexString(QByteArray data){ QString ret(data.toHex().toUpper()); int len = ret.length()/2; qDebug()<<len; for(int i=1;i<len;i++) { //qDebug()<<i; ret.insert(2*i+i-1," "); } return ret; }