UartAssistant Demo

Files:

• examples/uartassistant/dialog.cpp
• examples/uartassistant/dialog.h
• examples/uartassistant/dialog.ui
• examples/uartassistant/hled.cpp
• examples/uartassistant/hled.h
• examples/uartassistant/main.cpp
• examples/uartassistant/uartassistant.pro

The example demonstrates how to use QextSerialPort.

Initialze UI element.

    foreach (QextPortInfo info, QextSerialEnumerator::getPorts())
        ui->portBox->addItem(info.portName);
    //make sure user can input their own port name!
    ui->portBox->setEditable(true);

    ui->baudRateBox->addItem("1200", BAUD1200);
    ui->baudRateBox->addItem("2400", BAUD2400);
    ui->baudRateBox->addItem("4800", BAUD4800);
    ui->baudRateBox->addItem("9600", BAUD9600);
    ui->baudRateBox->addItem("19200", BAUD19200);
    ui->baudRateBox->setCurrentIndex(3);

    ui->parityBox->addItem("NONE", PAR_NONE);
    ui->parityBox->addItem("ODD", PAR_ODD);
    ui->parityBox->addItem("EVEN", PAR_EVEN);

    ui->dataBitsBox->addItem("5", DATA_5);
    ui->dataBitsBox->addItem("6", DATA_6);
    ui->dataBitsBox->addItem("7", DATA_7);
    ui->dataBitsBox->addItem("8", DATA_8);
    ui->dataBitsBox->setCurrentIndex(3);

    ui->stopBitsBox->addItem("1", STOP_1);
    ui->stopBitsBox->addItem("2", STOP_2);

    ui->queryModeBox->addItem("Polling", QextSerialPort::Polling);
    ui->queryModeBox->addItem("EventDriven", QextSerialPort::EventDriven);

Initialize serial port

    PortSettings settings = {BAUD9600, DATA_8, PAR_NONE, STOP_1, FLOW_OFF, 10};
    port = new QextSerialPort(ui->portBox->currentText(), settings, QextSerialPort::Polling);

port Settings

    void Dialog::onBaudRateChanged(int idx)
    {
        port->setBaudRate((BaudRateType)ui->baudRateBox->itemData(idx).toInt());
    }

    void Dialog::onParityChanged(int idx)
    {
        port->setParity((ParityType)ui->parityBox->itemData(idx).toInt());
    }

    void Dialog::onDataBitsChanged(int idx)
    {
        port->setDataBits((DataBitsType)ui->dataBitsBox->itemData(idx).toInt());
    }

    void Dialog::onStopBitsChanged(int idx)
    {
        port->setStopBits((StopBitsType)ui->stopBitsBox->itemData(idx).toInt());
    }

    void Dialog::onQueryModeChanged(int idx)
    {
        port->setQueryMode((QextSerialPort::QueryMode)ui->queryModeBox->itemData(idx).toInt());
    }

    void Dialog::onTimeoutChanged(int val)
    {
        port->setTimeout(val);
    }

Open or Close the port.

    void Dialog::onOpenCloseButtonClicked()
    {
        if (!port->isOpen()) {
            port->setPortName(ui->portBox->currentText());
            port->open(QIODevice::ReadWrite);
        }
        else {
            port->close();
        }

        //If using polling mode, we need a QTimer
        if (port->isOpen() && port->queryMode() == QextSerialPort::Polling)
            timer->start();
        else
            timer->stop();

        //update led's status
        ui->led->turnOn(port->isOpen());
    }

Read from or Write to the port

    void Dialog::onSendButtonClicked()
    {
        if (port->isOpen() && !ui->sendEdit->toPlainText().isEmpty())
            port->write(ui->sendEdit->toPlainText().toLatin1());
    }

    void Dialog::onReadyRead()
    {
        if (port->bytesAvailable()) {
            ui->recvEdit->moveCursor(QTextCursor::End);
            ui->recvEdit->insertPlainText(QString::fromLatin1(port->readAll()));
        }
    }

    void Dialog::onPortAddedOrRemoved()
    {
        QString current = ui->portBox->currentText();

        ui->portBox->blockSignals(true);
        ui->portBox->clear();
        foreach (QextPortInfo info, QextSerialEnumerator::getPorts())
            ui->portBox->addItem(info.portName);

        ui->portBox->setCurrentIndex(ui->portBox->findText(current));

        ui->portBox->blockSignals(false);
    }