main.cpp Example File

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** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
** Contact: https://www.qt.io/licensing/
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** This file is part of the QtSerialPort module of the Qt Toolkit.
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#include <QCoreApplication>
#include <QFile>
#include <QSerialPort>
#include <QStringList>
#include <QTextStream>

int main(int argc, char *argv[])
{
    QCoreApplication coreApplication(argc, argv);
    const int argumentCount = QCoreApplication::arguments().size();
    const QStringList argumentList = QCoreApplication::arguments();

    QTextStream standardOutput(stdout);

    if (argumentCount == 1) {
        standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]")
                          .arg(argumentList.first()) << endl;
        return 1;
    }

    QSerialPort serialPort;
    const QString serialPortName = argumentList.at(1);
    serialPort.setPortName(serialPortName);

    const int serialPortBaudRate = (argumentCount > 2)
            ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
    serialPort.setBaudRate(serialPortBaudRate);

    if (!serialPort.open(QIODevice::WriteOnly)) {
        standardOutput << QObject::tr("Failed to open port %1, error: %2")
                          .arg(serialPortName).arg(serialPort.errorString())
                       << endl;
        return 1;
    }

    QFile dataFile;
    if (!dataFile.open(stdin, QIODevice::ReadOnly)) {
        standardOutput << QObject::tr("Failed to open stdin for reading")
                       << endl;
        return 1;
    }

    QByteArray writeData(dataFile.readAll());
    dataFile.close();

    if (writeData.isEmpty()) {
        standardOutput << QObject::tr("Either no data was currently available on "
                                      "the standard input for reading, or an error "
                                      "occurred for port %1, error: %2")
                          .arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    const qint64 bytesWritten = serialPort.write(writeData);

    if (bytesWritten == -1) {
        standardOutput << QObject::tr("Failed to write the data to port %1, error: %2")
                          .arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (bytesWritten != writeData.size()) {
        standardOutput << QObject::tr("Failed to write all the data to port %1, error: %2")
                          .arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (!serialPort.waitForBytesWritten(5000)) {
        standardOutput << QObject::tr("Operation timed out or an error "
                                      "occurred for port %1, error: %2")
                          .arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    standardOutput << QObject::tr("Data successfully sent to port %1")
                      .arg(serialPortName) << endl;

    return 0;
}