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Location of TSLIB(libts.so) and QT PLUGIN(libqtslibplugin.so)

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  • S Offline
    S Offline
    Sidii
    wrote on last edited by
    #1

    Hi All,
    I have generated the library from tslib source.
    After that i included it in the QT configure command by giving -tslib switch.

    Now my question is where i need to place the libts.so and QT plugin: libqtslibplugin.so
    so that they can be called?

    I created a simple QT program containing Main Window with QPushButton. When i deploy it to my embedded system then nothing happens when i press the QPushbotton.

    Even this qDebug statement is also not getting called:

    @QTsLibMouseHandler::QTsLibMouseHandler(const QString &key,
    const QString &specification)
    : m_notify(0), m_x(0), m_y(0), m_pressed(0), m_rawMode(false)
    {
    qDebug() << "QTsLibMouseHandler" << key << specification;
    @

    The above code is located in qtbase/src/plugins/generic/tslib/qtslib.cpp

    So where should i place the TSLIB library and libqtslibplugin.so so that it can be used by my simple QUI application.

    Kindly help

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      IIRC, libqtslibplugin.so should be in /path/to/your/target/Qt/plugins/generic/ and tslib.so itself must be in a known path like /usr/local/lib/

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      • S Offline
        S Offline
        Sidii
        wrote on last edited by
        #3

        Dear SGaist,

        Thanks a lot for reply, i was desperately looking for the answer. I tried but it didn't work. I am now telling my setup, then you tell me where i am wrong:

        My Simple Button Application is kept inside:
        /home/Sid

        LinuxFB plugin is inside:
        @/home/Sid/platforms/libqlinuxfb.so@

        QT's plugin for touch support is inside:
        @/home/Sid/plugins/generic/libqtslibplugin.so@

        QT plugins and libts.so [that i built from source code] are inside:
        @/home/Sid@

        And /home/Sid is added to LD_LIBRARY_PATH so i am able to see the application with a single button. But when i press, i can't see any change in button state like getting pressed. It remains as it is. Also qDebug statement
        @qDebug() << "QTsLibMouseHandler" << key << specification;@
        is also not getting called.

        Other environment settings that i am doing is also given below:

        @
        export QT_QPA_PLATFORM=linuxfb
        export QT_PLUGIN_PATH=/home/Sid/plugins/generic
        export QT_QPA_GENERIC_PLUGINS=tslib
        export QT_QPA_FONTDIR=/home/Sid/fonts
        export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/Sid
        export TSLIB_FBDEVICE=/dev/fb0
        @

        Kindly tell me what i am missing.

        Thanks

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          Did you configure tslib on your target ?

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • S Offline
            S Offline
            Sidii
            wrote on last edited by
            #5

            yes i generated both QT libraries and TSLIB libraries for target: power pc.
            Also when i do

            @ file libts.so@

            I get following:

            @libts.so: ELF 32-bit MSB shared object, PowerPC or cisco 4500, version 1 (SYSV), dynamically linked, with unknown capability 0x41000000 = 0x13676e75, with unknown capability 0x10000 = 0xb0401, not stripped
            @

            so both QT libraries and TSLIB are in same format.

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #6

              I mean, properly setup TSLIB, initialized it ?

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • S Offline
                S Offline
                Sidii
                wrote on last edited by
                #7

                I checked that TSLIB has some inbuilt tools that also got generated while compiling the src code, like ts_test, ts_calibrate.

                i am not getting what you mean by "initialized it", do you mean to test the functionality using these tools or there is some another way of initializing it. Kindly explain how to proceed.

                I also found that there is touch screen connected to the embedded board but there is no input folder/node inside the device folder.

                Generally all the touchscreen/input related devices are listed inside:
                @/dev/input/something_here@

                But there is no input node in my system.
                Is there any other way to interact with the LCD touch screen?

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  Not knowing anything about your LCD screen, I can't tell how it should show up or whether it's connected correctly on your system.

                  The tslib tools are there to help you set the various environment variable needed by the library to work properly

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                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                  • S Offline
                    S Offline
                    Sidii
                    wrote on last edited by
                    #9

                    Dear SGaist, thanks for your reply. It seems it is a serial device. Is it possible to get the x,y coordinates from the screen and then map it to the QT Screen so that i can know what button is clicked? I have done serial programming in QT for GPS devices, but i have no idea of mapping to the Framebuffer to know what widget is getting touch.

                    Just give me some pointers so that i can think in that direction.
                    Thanks :)

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      Didn't you succeed configuring tslib ?

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • S Offline
                        S Offline
                        Sidii
                        wrote on last edited by
                        #11

                        no because there is no dedicated driver, it is a serial device :(

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #12

                          How does the system see it ? /dev/ttyS0 or something like that ?

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • S Offline
                            S Offline
                            Sidii
                            wrote on last edited by
                            #13

                            yes you are correct, also i found that when i do
                            @cat ttyS1@

                            then some junk characters are printed on putty terminal whenever i touch the lcd.
                            But i am not able to see x,y coordinates. I think some baud rate mismatch is there.

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #14

                              hexdump will give you a cleaner output.

                              Well, AFAIK, setting TSLIB_TSDEVICE to /dev/ttyS1 should get you started, no ?

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                              • S Offline
                                S Offline
                                Sidii
                                wrote on last edited by
                                #15

                                I tried setting the same:

                                @
                                export QT_QPA_PLATFORM=linuxfb
                                export QT_PLUGIN_PATH=/home/Sid/plugins/generic
                                export QT_QPA_GENERIC_PLUGINS=tslib
                                export QT_QPA_FONTDIR=/home/Sid/fonts
                                export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/Sid
                                export TSLIB_FBDEVICE=/dev/fb0
                                export TSLIB_TSDEVICE=/dev/ttyS1 -------->>SEE THIS
                                export TSLIB_PLUGINDIR=/home/Sid/tslib_plugins
                                export TSLIB_CONFFILE=/home/Sid/ts.conf

                                @

                                But when i run ./ts_test, i get no output :(
                                The program keeps running without any output unit i give Ctrl+C

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                                • SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #16

                                  Did you run ts_calibrate first ?

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                  • S Offline
                                    S Offline
                                    Sidii
                                    wrote on last edited by
                                    #17

                                    Yes, no output from ts_calibrate also..

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                                    • S Offline
                                      S Offline
                                      Sidii
                                      wrote on last edited by
                                      #18

                                      and if i do

                                      @./ts_print@

                                      i get following output:

                                      selected device is not a touchscreen I understand

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                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #19

                                        Which module are you using ?

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                        • S Offline
                                          S Offline
                                          Sidii
                                          wrote on last edited by
                                          #20

                                          Sorry i did not get you. Module??

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