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Mobile and Embedded

The forum for developing everything embedded: Linux, WinCE, Symbian, MeeGo... you name it.
14.1k Topics 62.5k Posts
  • Qtcreator 4.5.2 Ubuntu 18, Bare metal

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    aha_1980A
    Hi @comarius, glad you found a solution. So please mark this topic as SOLVED with the button "Topic Tools". Thanks!
  • cross compile Qt\raspberry pi3 stretch, OpenGL Error

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    Thanks @Cleiton-Bueno, I just repeat the steps as you mentioned and it worked this way, I was able to configure it, but I am little bit confused till which step should I stop here! https://wiki.qt.io/RaspberryPi2EGLFS, becasue I did everything and at the end It looks like Qt didn't accept my qmake file Attached below is my configuration log file, I hope if you can find the time to have a look on it, I saw some errors inside but I couldn't resolve the issue, I am still beginner for this staff. https://docs.google.com/document/d/1-Dq9tg9sXo4q6dpIeyYbokvNHbS2wL473GuR4GtP3fU/edit?usp=sharing
  • This topic is deleted!

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  • how to load html,css and JS file for webView from qrc on android

    Solved webview qml android qrc
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    jsulmJ
    @noone You will need to extract the content from qrc file to some location writable by your application and then load it from there in webview.
  • Qt fails to create xml file: "No such file or directory"

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    SGaistS
    Hi, What do you get if you try to open a file that actually exists on your hard drive ?
  • ListView kinetic scrolling speed

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    I just found the problem! The property ListView.maximumFlickVelocity is to low for high resolution displays. So I have to adjust it according to screen DPI. Now it works perfectly.
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    Alvaro DenisA
    For a major question(install in my host), use -extprefix and -hostprefix, see more with configure --help or follow this link: https://gist.github.com/arraytools/604e5bc5b0c56c1cfb30#file-qt5-5_configure-L8 For other opinions, I keep the question open.
  • Compile Qt 5.6 for Windows Ce 6.0 linking issue

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    Found the reason for the problem in somebody else post: link text The reason the linker is looking for wmain, is because the C++ code is referencing __argv[]. __argv[] is the method console apps use to determine the command line arguments. For some reason, just by referencing this variable, the linker wants to start with wmain, which will allow that variable to be filled in. By commenting out the reference to __argv[], the linker no longer is looking for wmain, and starts with WinMain as expected. What a bizarre error, and very difficult to find. This seems to be unique to CE, as this is not the behavior for Win32. I solved it in qcoreapplication.cpp by excluding the code that references __argv #if defined(Q_OS_WIN) && !defined(Q_OS_WINRT) // Check whether the command line arguments match those passed to main() // by comparing to the global __argv/__argc (MS extension). // Deep comparison is required since argv/argc is rebuilt by WinMain for // GUI apps or when using MinGW due to its globbing. static inline bool isArgvModified(int argc, char **argv) { #if (!defined(Q_OS_WINCE) || _WIN32_WCE>0x600) if (__argc != argc || !__argv /* wmain() */) return true; if (__argv == argv) return false; for (int a = 0; a < argc; ++a) { if (argv[a] != __argv[a] && strcmp(argv[a], __argv[a])) return true; } #endif return false; }
  • QLowEnergyService never completes discovery

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    sierdzioS
    Thanks for info
  • Xwayland touch for X11 application

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  • This topic is deleted!

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  • 3 Votes
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    B
    Thanks。 you help me too much。
  • How to compile only arm64 target on iOS

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    C
    @SGaist QT9.6. I changed a method, the library linked to the program is also compiled armv7 and arm64. First compile the armv7 and arm64 libraries separately, then merge them with the lipo tool.
  • Settings for Android development (also for PySide2)

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    SGaistS
    Hi, Not that carefully: you installed NDK r18 while r10e is recommend. From some posts I've seen, it seems that r17 might be an option. But IIRC with r18, gcc was dropped and is now a symlink to clang. More information about Python on Android can be find here.
  • Checking compatibility of custom framebuffer with Qt application

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    E
    I tried to export that and looked at framebuffer calls. Its seems that qt linuxfb just calls mmap and grabs a pointer to the buffer memory. It then just edits all the pixels using that pointer. Thanks for the suggestion! I was able to track that my framebuffer driver was wrong and was able to change it.
  • Windows 10 for Android Project

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    R
    I have found the problem. The auto-detect kits function only works using NDK 10, while before I was using NDK 18. So after selecting the kits, the project can be built. But this problem is hard to detect because there's no useful information.
  • Missing compilers for andorid

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    Pablo J. RoginaP
    @amanill are you sure you have followed the prerequisites?
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  • Boot time optimization techniques

    Unsolved loader boottime optimization earlyboot static linking
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    @JKSH Yes I did. On QT part, we followed a lot of techniques mentioned in that post. Using Loaders for lazy loading, optimizing images, using qtquickcompiler. The major challenge is on the OS boot time that we are working on.