Ubuntu 下使用QT开发的串口程序

#include "mainwindow.h" #include "ui_mainwindow.h" #include <iostream> #include <QMessageBox> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); QObject::connect(&serial,&QSerialPort::readyRead,this,&MainWindow::serialPort_readyRead); } MainWindow::~MainWindow() { delete ui; } void MainWindow::btn_checkPort_clicked() { std::cout<<"mySlot"<<std::endl; ui->cbPortName->clear(); //通过QSerialPortInfo查找可用串口 foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) { ui->cbPortName->addItem(info.portName()); } ui->cbPortName->addItem("ttyS10"); ui->cbPortName->addItem("ttyS11"); ui->cbBaudRate->addItem(QString("9600")); ui->cbDataBit->addItem(QString("8")); ui->cbCrc->addItem(QString("0")); ui->cbStopBit->addItem(QString("1")); } void MainWindow::btn_openPort_clicked() { if(ui->btnOpenPort->text()==QString("打开串口")) { serial.setPortName(ui->cbPortName->currentText()); serial.setBaudRate(ui->cbBaudRate->currentText().toInt()); switch(ui->cbDataBit->currentIndex()) { case 8: serial.setDataBits(QSerialPort::Data8); break; default: break; } //设置奇偶校验 switch(ui->cbCrc->currentIndex()) { case 0: serial.setParity(QSerialPort::NoParity); break; default: break; } //设置停止位 switch(ui->cbStopBit->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->cbPortName->setEnabled(false); ui->cbBaudRate->setEnabled(false); ui->cbDataBit->setEnabled(false); ui->cbCrc->setEnabled(false); ui->cbStopBit->setEnabled(false); ui->btnOpenPort->setText(QString("关闭串口")); //发送按键使能 ui->btnSendData->setEnabled(true); } else { //关闭串口 serial.close(); //下拉菜单控件使能 ui->cbPortName->setEnabled(true); ui->cbBaudRate->setEnabled(true); ui->cbDataBit->setEnabled(true); ui->cbCrc->setEnabled(true); ui->cbStopBit->setEnabled(true); ui->btnOpenPort->setText(QString("打开串口")); //发送按键失能 ui->btnSendData->setEnabled(false); } } void MainWindow::btn_sendData_clicked() { //获取界面上的数据并转换成utf8格式的字节流 QByteArray data = ui->txtSend->toPlainText().toUtf8(); serial.write(data); } void MainWindow::btn_recvClear_clicked() { ui->txtRecv->clear(); } void MainWindow::serialPort_readyRead() { //从接收缓冲区中读取数据 QByteArray buffer = serial.readAll(); //从界面中读取以前收到的数据 QString recv = ui->txtRecv->toPlainText(); recv += QString(buffer); //清空以前的显示 ui->txtRecv->clear(); //重新显示 ui->txtRecv->append(recv); }