Noob needs help with Elo Touchscreen

Vulpecula

Can somebody help me with, maybe, a simple problem? I have an old ELO touchscreen (single touch, type ET1546L) connected to a raspberry pi. I can see the Raspbian desktop and the touchscreen functions normally. Every touch is sensed. But when I develop a simple QML to display on the touchscreen, the touches on the screen aren't processed. I have configured Qt with evdev support.

Maybe I forget something but I don't know what. Could someone point me in the right direction?

My code
import QtQuick 2.2
import QtQuick.Window 2.1

Window {

visible: true
width: 360
height: 360

MouseArea {
    anchors.fill: parent
    onClicked: {
        console.log("touch down!!!")
    }
}

Text {
    text: qsTr("Hello World")
    anchors.centerIn: parent
}

}

SGaist

Hi and welcome to devnet,

How are you starting your application ?

Vulpecula

I'm developing on my ubuntu machine. I have followed the beginners guide for developing on raspberry pi. I run the program by hitting ctrl + r.

SGaist

Did you check that your RPi user has access to the device ?

The Embedded Linux chapter has pointer to help you find out what may be going wrong

Vulpecula

I changed the permissions of the device to 777 and tested it then but still the touch isn't sensed. I also tried the tslib option by adding the enviroment variables but this doesn't solve my problem too. One thing i noticed is that when I plugin a usb mouse the mouse point is visible in my program. If I switch the usb mouse with the usb part of the touchscreen no mouse pointer is visible.

Can you help me further?

SGaist

Did you first check that tslib is working properly ?

Vulpecula

@SGaist

Sorry for my noob question but: How can i do that?

SGaist

You can use ts_calibrate

Vulpecula

Sorry for my delay but I wasn't able to respond sooner. When I type ts_calibrate i get the following message.

ts_open: No such file or directory

Could you help me again with this problem?

SGaist

Did you setup the environment variables for ts_calibrate to run properly ?

Vulpecula

[edit]

I've founded that i allready installed tslib via apt-get. I think the git install was conflicting with the already installed tslib. No I removed the tslib via apt-get and install from this git directory. Now ts_calibrate works. I have calibrated the screen. Also ts_test returns values.

But when I run my program (see below) from QT creator and hit the blue rectangle nothing happens. The program had to close. When i put the rectangle in the left upper corner and run the program and touch the screen the rectangle get hit and the program close. So the touch works only the movement of the mouse cursor doesn't go to the point where the touch is. The mouse arrow stays in the left upper corner. Can you tell me what I'm forgetting?

My QML code

import QtQuick 2.3
import QtQuick.Window 2.2

Window {
    visible: true

    Rectangle {
        x:100;y:100;width:100;height:100
        color: "blue"

    MouseArea {
        anchors.fill: parent
        onClicked: {
            Qt.quit();
        }
    }
    }
    Text {
        text: qsTr("Hello World")
        anchors.centerIn: parent
    }
}

Vulpecula

I have added the following to the run arguments -plugin Tslib and gets the following message in de QTCreator application output windows

ts_open() failed (No such file or directory)

But when I do ts_calibrate of ts_test on my raspberry everything works. Can someone help me with this?

SGaist

Did you check the environment variables of the Run part in the Project panel ?

Vulpecula

Thank you for your reply. I have it finally working. With the following environment variables. Especially the LD_PRELOAD was important. After adding that variable the touchscreen starting to work. I think its because I used tslib from github . Thanks for you patience.

Environment variables

LD_LIBRARY_PATH=/usr/local/lib
LD_PRELOAD=/usr/local/lib/libts-0.0.so.0
QT_DEBUG_PLUGINS=1
QT_PLUGIN_PATH=/usr/lib/plugins
QT_QPA_FONTDIR=/usr/lib/fonts
QT_QPA_GENERIC_PLUGINS=tslib:/dev/input/event0
QT_QPA_PLATFORM=eglfs
QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/plugins/platforms
TSLIB_CALIBFILE=/home/pi/pointercal
TSLIB_CONFFILE=/usr/local/etc/ts.conf
TSLIB_CONSOLEDEVICE=none
TSLIB_FBDEVICE=/dev/fb0
TSLIB_PLUGINDIR=/usr/local/lib/ts
TSLIB_TSDEVICE=/dev/input/event0
TSLIB_TSEVENTTYPE=INPUT

SGaist

So you have it working now properly ?

Vulpecula

@SGaist

Well, I tought it works completely but there is one problem. When I push on the MouseArea the cursor is going to that position where I push but most of the time there is not a onclicked event triggered. When I push multiple times on the mousearea sometime the onclick event will be triggered, maybe 1 out of 10 á 15 times.

I have connected the touchscreen to a Windows machine en every push on the screen is triggered. This is why I thing that there is something wrong with my tslib configuration.

Can you help me with this problem?

SGaist

Did you run ts_calibrate ?

Vulpecula

Yes, and it works fine. I also got a pointercal file. And ts_test works also. Maybe the debug output is usefull.


QML debugging is enabled. Only use this in a safe environment.
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5pi/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/opt/test2/bin" ...
QFactoryLoader::QFactoryLoader() looking at "/opt/test2/bin/test2"
"Plugin verification data mismatch in '/opt/test2/bin/test2'" 
         not a plugin
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5pi/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqeglfs.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqminimalegl.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/platforms/libqxcb.so"
Found metadata in lib /usr/local/qt5pi/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/opt/test2/bin/platforms" ...
loaded library "/usr/local/qt5pi/plugins/platforms/libqeglfs.so"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5pi/plugins/egldeviceintegrations" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-brcm-integration.so"
Found metadata in lib /usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-brcm-integration.so, metadata=
{
    "IID": "org.qt-project.qt.qpa.egl.QEGLDeviceIntegrationFactoryInterface.5.5",
    "MetaData": {
        "Keys": [
            "eglfs_brcm"
        ]
    },
    "className": "QEglFSBrcmIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("eglfs_brcm")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-kms-integration.so"
Found metadata in lib /usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-kms-integration.so, metadata=
{
    "IID": "org.qt-project.qt.qpa.egl.QEGLDeviceIntegrationFactoryInterface.5.5",
    "MetaData": {
        "Keys": [
            "eglfs_kms"
        ]
    },
    "className": "QEglFSKmsIntegrationPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("eglfs_kms")
QFactoryLoader::QFactoryLoader() checking directory path "/opt/test2/bin/egldeviceintegrations" ...
loaded library "/usr/local/qt5pi/plugins/egldeviceintegrations/libqeglfs-brcm-integration.so"
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5pi/plugins/generic" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqevdevkeyboardplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqevdevkeyboardplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevKeyboard"
        ]
    },
    "className": "QEvdevKeyboardPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("evdevkeyboard")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqevdevmouseplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqevdevmouseplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevMouse"
        ]
    },
    "className": "QEvdevMousePlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("evdevmouse")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqevdevtabletplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqevdevtabletplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTablet"
        ]
    },
    "className": "QEvdevTabletPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("evdevtablet")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqevdevtouchplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqevdevtouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTouch"
        ]
    },
    "className": "QEvdevTouchScreenPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("evdevtouch")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqlibinputplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqlibinputplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "libinput"
        ]
    },
    "className": "QLibInputPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("libinput")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqtslibplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqtslibplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "Tslib",
            "TslibRaw"
        ]
    },
    "className": "QTsLibPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("tslib", "tslibraw")
QFactoryLoader::QFactoryLoader() looking at "/usr/local/qt5pi/plugins/generic/libqtuiotouchplugin.so"
Found metadata in lib /usr/local/qt5pi/plugins/generic/libqtuiotouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "TuioTouch"
        ]
    },
    "className": "QTuioTouchPlugin",
    "debug": false,
    "version": 329218
}


Got keys from plugin meta data ("tuiotouch")
QFactoryLoader::QFactoryLoader() checking directory path "/opt/test2/bin/generic" ...
loaded library "/usr/local/qt5pi/plugins/generic/libqtslibplugin.so"
Found metadata in lib /usr/local/qt5pi/qml/QtQuick.2/libqtquick2plugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuick2Plugin",
    "debug": false,
    "uri": [
        "QtQuick.2"
    ],
    "version": 329218
}


loaded library "/usr/local/qt5pi/qml/QtQuick.2/libqtquick2plugin.so"
Found metadata in lib /usr/local/qt5pi/qml/QtQuick/Window.2/libwindowplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0",
    "MetaData": {
    },
    "className": "QtQuick2WindowPlugin",
    "debug": false,
    "uri": [
        "QtQuick.Window.2"
    ],
    "version": 329218
}


loaded library "/usr/local/qt5pi/qml/QtQuick/Window.2/libwindowplugin.so"
QFactoryLoader::QFactoryLoader() checking directory path "/usr/local/qt5pi/plugins/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "/opt/test2/bin/accessible" ...
User requested stop. Shutting down...
Application finished with exit code 1.

SGaist

What parameter are you passing to your application ?

Vulpecula

@SGaist

LD_LIBRARY_PATH=/usr/local/lib
QT_DEBUG_PLUGINS=1
QT_PLUGIN_PATH=/usr/lib/qt5pi/plugins
QT_QPA_EGLFS_HIDECURSOR=1
QT_QPA_FB_DISABLE_INPUT=1
QT_QPA_FONTDIR=/usr/lib/fonts
QT_QPA_GENERIC_PLUGINS=tslib:/dev/input/event0
QT_QPA_PLATFORM=eglfs
QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/qt5pi/plugins/platforms
TSLIB_CALIBFILE=/usr/local/etc/pointercal
TSLIB_CONFFILE=/usr/local/etc/ts.conf
TSLIB_CONSOLEDEVICE=none
TSLIB_FBDEVICE=/dev/fb0
TSLIB_PLUGINDIR=/usr/local/lib/ts
TSLIB_TSDEVICE=/dev/input/event0
TSLIB_TSEVENTTYPE=INPUT

This are all the environment variable. Arguments field is empty.

When i insert a USB mouse into the raspberry the mouse works directly and every mouseclick is triggered