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AM3517 EVM touch screen app

erwin xu
Prodigy 200 points
Other Parts Discussed in Thread: AM3517

Hi all

I was writing PowerVR applications over am3517 evm, trying to get input from the on-board touch screen, and this statement was implemented in RenderScene() in my program:

 

float *pfTouch=0;

pfTouch = (float*) PVRShellGet(prefPointerLocation);

But it always returned 0, if it means that the touch screen was not functioning? Or maybe I missed some settings to active the touch screen? or lack of some software packages? need help.

thanks

 

  • 0
    TI__Prodigy 340 points

    Hi erwin xu,

    The touch screen support is NOT enabled (build time) by default in the PVRShell

    Simple way to enable this is to add the below define in "./GFX_Linux_SDK/OGLES/SDKPackage/Shell/OS/LinuxRaw/PVRShellOS.h" file at the top.

    #define PVRSHELL_OMAP3_TS_SUPPORT

    And, update *.mak files to add the paths to ts include and library files as shown in the sample example below.

    1.  ./GFX_Linux_SDK/OGLES/SDKPackage/Builds/OGLES/LinuxGeneric/make_demo.mak

    .......

    INCLUDES += -I$(SDKDIR)/Tools/OGLES                                             \
                            -I$(SDKDIR)/Shell                                                               \
                            -I$(SDKDIR)/Shell/API/KEGL                                              \
                            -I$(SDKDIR)/Builds/OGLES/$(PLATFORM)/Include    \
                            -I$(SDKDIR)/Builds/OGLES/Include                                \
                            -I$(SHELLOSPATH)                                                                \
                            $(addprefix -I, $(PLAT_INC))                                    \
                            -I../../.. \
                            -I/proj/AVME10/mahesh/Graphics/tscreen/targetfs/include

    .....

    LINK            += -L/proj/AVME10/mahesh/Graphics/tscreen/targetfs/lib

    ....

    2.  /GFX_Linux_SDK/OGLES/SDKPackage/Builds/OGLES/LinuxOMAP3/make_platform.mak
      PLAT_LINK =  $(LIBDIR_FLAGS) -lts -lGLES_CM $(X11_LIBS) -lm -ldl

     

    Prior to the above steps, you require to build and install the touch screen module into the target file system

    source is available at http://prdownload.berlios.de/tslib/tslib-1.0.tar.bz2

    And calibrate the touch screen on the target by running

    ts_calibrate

    Please let me know if you face any issue.

    regards,

    Mahesh.

  • 0 in reply to MaheshM
    Prodigy 200 points

    Hi Mahesh

    I have solved this, I install and setup tslib, took a good look at the exsamples, and now I can handle it, thank you very much.

    erwin