Remote debugfing with Qtcreator, displays double floats/doubles incorrectly



  • I successfully compiled qt and have a complete remote debugging with single steps working, with the exception of float/double.
    I use QSettings to read a double value from a in file, and this is always wrong.. getting 1,50129.. e-45 for Floats and 4.9... e-313 tipically. Even the old 'C' atf () does not work, however , if I compile and run this on the arm itself, every thing works.

    I even tried to write a swap byte function (big-little endian) but this also does not work.
    @
    if (!config.contains(QString("calib/analog_output_a_m")))
    config.setValue (QString("calib/analog_output_a_m"), QVariant(double(1.00)));
    QString temp =config.value("calib/analog_output_a_m").toString();
    // print the string out, for debugging only, this is fine "1.0022541213"
    qDebug (">> Tmp = %s", temp.toLatin1().data());
    float dum =config.value("calib/analog_output_a_m").toFloat(&ok);
    // the above float displays bogus value .1,40129.. e-45 in debugger
    master->scale.output_m_0 = swap_bytes(dum);
    // the above answer is yet another bogus value
    qDebug(">> Tmp = %s %7.5f", temp.toLatin1().data(), master->scale.output_m_0);
    @
    Note I use Derek Molloy RemoteQT way and for the beagleboneblack setup on a raspberryPi.

    Is the reals different for the two ARM devices, and if so, how can I fix that?

    Thanks in advance
    Gerrie


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