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Pixel Missing problem while using Grlib on Tiva stellaris boosterpack

BNB
Prodigy 130 points
Other Parts Discussed in Thread: TM4C123GH6PM

HI All,

I am developing a touch screen based Application on Tiva TM4C123GH6PM and with kentec display. I am using Grlib for the application development. 

I am using a quite a few images in the application which I am saving all Images as constant C array like " const uint8_t g_pucBlue50x50[] ". Initial stage of my application development everything was fine but as I have added more Images to application for next phase of development I could see some Pixels being missed on One Image.

can anyone let me know the cause/solution for this problem.

Observations:

- Tried to convert the Image to C array again hoping the problem with Image but it's not :(

- Flash Usage: 31% out of 262k

- SRAM Usage: 28% of 32768

Please find the Attached screenshot for reference. You could see some black spots on the first Image(AUTO) of screen shot.

 

Thank you.

  • 0
    TI__Guru**** 244400 points
    Hello BNB

    Are the pixels missing on the same place. Did you try to paint white to see if the pixels are correctly getting lit up.
  • 0 in reply to Amit Ashara
    Prodigy 130 points
    Hi Amit, ya the pixels are missing in the same place. I didn't check painting white. But I tried replacing other image but same issue. At the same place when I go to next screen I couldn't see a problem.
  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB

    So the panel is working fine. Which version of TivaWare are you using?
  • 0 in reply to Amit Ashara
    Prodigy 130 points

    Hi Amit, I am using latest version 2.1.3.156 of tivaware.

  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB

    Could it be a problem in the image itself? Did you replace it with another image, like swapping the "Setting" and "Auto"?
  • 0 in reply to Amit Ashara
    Prodigy 130 points

    Hi Amit,

    Yes, I tried Exactly same. Replaced Auto Image with Settings Image and then also I could see pixels being missed on the image replaced with Auto. Then I believed there is no problem with Image.

    Thanks,

    BNB.

  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB

    It seems like it could be a software application or a driver problem. Since I do not have the same code as yours, it is tough to reproduce the same. Can you create a project that reproduces the issue with just the LaunchPad and the Panel and send it over,
  • 0 in reply to Amit Ashara
    Prodigy 130 points
    Hi Amit,
    I got you. As I already explained, i haven't see this problem when I used less no.of Images. So I try to create a new project with possibility of generating the problem.
    I am wondering is that becuase of any memory overlap because I have some calibration constants saved in Flash ??

    Thank you.
    -BNB
  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB

    Typically the images are stored on Flash as constants, so compiler would know where to place them, unless there is a image that overlaps with another when creating the content, due to an incorrect definition. But even then it should not cause random pixels to change.
  • 0 in reply to Amit Ashara
    Prodigy 130 points

    Hi Amit,

    The Problem I was facing was not with Pixels. It's in code developed by me, Which is still not clear why it is Happening. The reason I was able to find out is:

    RectangularButtonStruct(GFX_Panels + Home, HomeMenu + 1, 0,&g_sKentec320x240x16_SSD2119, 15, 30, 50, 50,PB_STYLE_IMG|PB_STYLE_TEXT, 0, 0, 0, 0,0, 0, Home_Speed,0, 0, 0, OnHomeMenuPress)

    In the above push button definition, I have added style as PB_STYLE_IMG | PB_STYLE_TEXT but not specified font or any text. But it's taking some garbage text and filling it on Push Button which looks like pixels missing.

    Now, I want to understand, though I am not specifying any text  why it is taking some garbage data/text to put on Image??

    Thank you.

    -BNB. 

  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB,

    I have not used PB_STYLE_IMG with PB_STYLE_TEXT. If you need to use text, I would suggest

    PB_STYLE_FILL | PB_STYLE_OUTLINE | PB_STYLE_TEXT
  • 0 in reply to Amit Ashara
    Prodigy 130 points
    HI Amit,
    I got It. I am also not using that combo,But when I was trying with Grlib I tried that combo,But it never gave me a problem until now. But now this became a point to look at.!!
    Anyway Thanks For the Help..!! :-)

    -BNB.
  • 0 in reply to BNB
    TI__Guru**** 244400 points
    Hello BNB

    I use PB_STYLE_IMG when the push button contains the information. PB_STYLE_TEXT is when i want to change the information. As an example a regular keypad I would draw with PB_STYLE_IMG, but an unlocking randomized keypad, I would draw with PB_STYLE_TEXT as the content is only what I need to change.