• State
  • Locked Locked
  • Replies 6 replies
  • Subscribers 98 subscribers
  • Views 1205 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Using ti81xx fb with qt

Tim Whipple
Intellectual 450 points

I'm trying to create a QT project for a DM816x board and ran into a roadblock.  My project will compile and run until I included the ti81xxfb.h file.  My project can't seem to find it.  

If I try to include ti81xxfb.h from the includes directory I get :

error: linux/ti81xxfb.h: No such file or directory

I copied the file directly into my project and everything worked great until I tried to use the FBIO_WAITFORVSYNC ioctl.  I'm thinking this is a similar problem with my project referencing the wrong headers perhaps.  I can compile the video examples using the ti81xxfb.h header and FBIO_WAITFORVSYNC but as soon as I try to add any of these to my QT projects it claims to not know what it is.

error: 'FBIO_WAITFORVSYNC' was not declared in this scope

Looking at the Makefile I can't tell exactly what is the problem but I'm guessing its the INCPATH????.  Manually editing this doesn't make the compiler happy.  I just haven't been able to verify this or find a solution.  Ideas?

  • 0
    Intellectual 450 points
    I'm thinking it's something from the qmake.conf file but nothing jumps out at me:

    #
    # qmake configuration for building with arm-linux-g++
    #

    include(../../common/g++.conf)
    include(../../common/linux.conf)
    include(../../common/qws.conf)

    #User specific Path - To Be edited by User
    QT_INSTALL_DIR = $$PWD/../../..
    SGX_SDK_ROOT = /home/tim/ti-ezsdk_dm816x-evm_5_05_02_00/component-sources/graphics-sdk_4.04.00.02
    TSLIB_INCDIR = $TSLIB_INSTALL_DIR/include
    TSLIB_LIBDIR = $FILESYSTEM_INSTALL_ROOT/usr/lib

    # modifications to g++.conf
    QMAKE_CFLAGS_RELEASE = -O3 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=softfp
    QMAKE_CXXFLAGS_RELEASE = -O3 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-abi=softfp
    QMAKE_CC = arm-none-linux-gnueabi-gcc
    QMAKE_CXX = arm-none-linux-gnueabi-g++
    QMAKE_LINK = arm-none-linux-gnueabi-g++
    QMAKE_LINK_SHLIB = arm-none-linux-gnueabi-g++

    # modifications to linux.conf
    QMAKE_AR = arm-none-linux-gnueabi-ar cqs
    QMAKE_OBJCOPY = arm-none-linux-gnueabi-objcopy
    QMAKE_STRIP = arm-none-linux-gnueabi-strip

    #Do not edit beyond this

    QMAKE_INCDIR_OPENGL_ES2 = $$SGX_SDK_ROOT/GFX_Linux_SDK/OGLES2/SDKPackage/Builds/OGLES2/Include/
    #QMAKE_INCDIR_OPENGL_ES2 += $$SGX_SDK_ROOT/GFX_Linux_SDK/OGLES2/SDKPackage/Builds/OGLES2/LinuxOMAP3/Include/
    QMAKE_INCDIR_OPENGL_ES2 += $$SGX_SDK_ROOT/include
    QMAKE_INCDIR_OPENGL_ES2 += $$SGX_SDK_ROOT/GFX_Linux_SDK/OGLES/SDKPackage/Builds/OGLES/Include/
    QMAKE_LIBDIR_OPENGL_ES2 = $$SGX_SDK_ROOT/gfx_rel_es6.x/
    QMAKE_LIBS_OPENGL_ES2 = -lEGL -lGLESv2 -lGLES_CM -lIMGegl -lsrv_um $$SGX_SDK_ROOT/gfx_rel_es6.x/libusc.so

    QMAKE_INCDIR_OPENGL += $$SGX_SDK_ROOT/GFX_Linux_SDK/OGLES/SDKPackage/Builds/OGLES/Include/
    QMAKE_LIBDIR_OPENGL = $$SGX_SDK_ROOT/gfx_rel_es6.x
    QMAKE_LIBDIR_OPENGL_QT = $$SGX_SDK_ROOT/gfx_rel_es6.x
    QMAKE_LIBS_OPENGL_ES1 = -lEGL -lGLES_CM -lIMGegl -lsrv_um -lusc

    QMAKE_INCDIR_OPENVG = $$SGX_SDK_ROOT/GFX_Linux_SDK/OVG/SDKPackage/Builds/OVG/Include/
    QMAKE_LIBDIR_OPENVG = $$SGX_SDK_ROOT/gfx_rel_es6.x/
    QMAKE_LIBS_OPENVG = -lEGL -lGLESv2 -lGLES_CM -lIMGegl -lsrv_um -lOpenVG -lOpenVGU

    QMAKE_INCDIR_EGL = $$QMAKE_INCDIR_OPENGL_ES2
    QMAKE_INCDIR_EGL += $$QT_INSTALL_DIR/src/3rdparty/powervr/wsegl2
    QMAKE_INCDIR_POWERVR = $$QT_INSTALL_DIR/src/3rdparty/powervr/wsegl2
    QMAKE_LIBDIR_EGL = $$QMAKE_LIBDIR_OPENGL_ES2
    QMAKE_LIBS_EGL = -lEGL -lIMGegl -lsrv_um -lGLESv2 -lGLES_CM -lusc

    QMAKE_INCDIR += $$TSLIB_INCDIR
    QMAKE_INCDIR += $$QMAKE_INCDIR_OPENGL_ES2
    QMAKE_LIBDIR += $$QMAKE_LIBDIR_OPENGL_ES2
    QMAKE_LIBDIR += $$TSLIB_LIBDIR
    QMAKE_LIBS = $$QMAKE_LIBS_OPENGL_ES2
    #-lts

    load(qt_config)
  • 0 in reply to Tim Whipple
    TI__Guru**** 170625 points
    Hi Tim,

    Make sure your PATH environment variable contains qmake:

    host$ source ~/ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/environment-setup

    On success you should have [linux-devkit]host>

    Please follow the exact steps from ti-ezsdk_dm816x-evm_5_05_02_00/docs/DM816x_EZ_Software_Developers_Guide.pdf
    5.4 Creating a Qt/Embedded application

    BR
    Pavel
  • 0 in reply to Pavel Botev
    Intellectual 450 points

    'which qmake' shows me the path to qmake.

    I also run the environment_setup.     

    Despite both of these steps my project refuses to recognize: #include <linux/ti81xxfb.h>

    The problem arises when qmake is used to generate the makefile.  The resulting file builds and seems to run until I start to include <linux/ti81xxfb.h> 

    error: linux/ti81xxfb.h: No such file or directory

    The file does exist but it seems the build environment may be looking in the wrong place.  If I try to manually add it to the INCPATH in the makefile it return an error and lets me know that is not a viable option.

  • 0 in reply to Tim Whipple
    TI__Guru**** 170625 points
    Yes, seems to be Makefile related issue.

    Can you try with passing the whole path in the .cpp file (application):

    #include </home/users/pbotev/ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/arm-none-linux-gnueabi/usr/src/linux-2.6.37-psp04.04.00.01-headers/include/linux/ti81xxfb.h>

    BR
    Pavel
  • 0 in reply to Pavel Botev
    TI__Guru**** 170625 points

    Tim,

    The Qt header files are located at:
    ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/arm-none-linux-gnueabi/usr/include/qtopia

    This path depends on the OE_QMAKE_INCDIR_QT variable:

    [linux-devkit]:~/workdir/qt> echo $OE_QMAKE_INCDIR_QT
    /home/users/pbotev/ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/arm-none-linux-gnueabi/usr/include/qtopia

    This variable is set (export) when you source the environment-setup script, check this script:

    ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/environment-setup

    export OE_QMAKE_INCDIR_QT=${SDK_PATH}/${TARGET_SYS}/usr/include/qtopia



    ti81xxfb.h is linux kernel header file which I am not sure you should use for Qt application.

    ti-ezsdk_dm816x-evm_5_05_02_00/linux-devkit/arm-none-linux-gnueabi/usr/src/linux-2.6.37-psp04.04.00.01-headers/include/linux/ti81xxfb.h

    ti-ezsdk_dm816x-evm_5_05_02_00/board-support/linux-2.6.37-psp04.04.00.01/include/linux/ti81xxfb.h

    BR
    Pavel

  • 0 in reply to Pavel Botev
    Intellectual 450 points

    Changing the include path to be explicit does work but then I get an error for trying to use FBIO_WAITFORVSYNC.  The linux/fb.h is not the correct one as well.  I can explicitly change this to be an absolute path in ti81xxfb.h and then the second error foes away but I'm not a big fan of doing this as a permanent solution.

    I need access to the ti81xxfb.h version in Qt because it is just too slow in it's implementations.  I need direct access to the framebuffer to display images.  Can't get more than 15FPS letting Qt do the work.  I tried OPENGL as well and it was equally slow.  Various implementations get me a little better numbers but I can only get 30FPS writing to the framebuffer directly.