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aki
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April 16, 2014
Question

STemWin in landscape with Cube + STM32F429discovery

  • April 16, 2014
  • 18 replies
  • 3661 views
Posted on April 16, 2014 at 11:37

I'm having problems to produce correctly working landscape LCD with STemWin and STM32F429 discovery. I'm using STemWin_HelloWorld application from STM32Cube_FW_F4_V1.1.0 as a base for my tests. I don't need to rotate screen during run-time.

I have only changed display drivers in LCDConf from GUIDRV_LIN_32 to GUIDRV_LIN_OSY_32 to produce landscape screen. This results correctly oriented screen with correctly printed texts with GUI_DispStringAt(). But background and painting functions like GUI_FillCircle() will create three striped areas on top of each others. Looks like a synchronisation problem but haven't manage to sort it out. Furthermore wondering why texts are working correctly and drawings not. Changing physical size to 240x240 fixes the problem - except it's not full screen and 320 width.

https://scontent-a-ams.xx.fbcdn.net/hphotos-ash3/t1.0-9/10246499_672755232786025_2797032601679556975_n.jpg

.

Application code for this image:

  GUI_SetFont(&GUI_Font20_1);

  GUI_DispStringAt(''Hello world!'', (LCD_GetXSize()-100)/2, (LCD_GetYSize()-20)/2);

  GUI_DispStringAt(''0'', 0, 0);

  GUI_DispStringAt(''1'', 100, 0);

  GUI_DispStringAt(''2'', 200, 0);

  GUI_DispStringAt(''3'', 300, 0);

  GUI_DispStringAt(''A'', 0, 100);

  GUI_DispStringAt(''B'', 0, 200);

  GUI_DispStringAt(''C'', 0, 300);

  GUI_FillCircle(100, 100, 10);

Any ideas to fix this problem?

    This topic has been closed for replies.

    18 replies

    Show previous replies
    Noppe.Jack
    Noppe.Jack
    Senior
    May 30, 2014
    Posted on May 30, 2014 at 13:35

    Hi,

    Sorry for not including it in the previous post :)  Here it is ...  

    http://i111.indigo.fastwebserver.de/index.php?page=Thread&postID=5860#post5860

     

    Thanks for looking into this,

    J

    Noppe.Jack
    Noppe.Jack
    Senior
    June 16, 2014
    Posted on June 16, 2014 at 15:59

    Hi :)  Have you by any chance had an opportunity to look into this some more?

    Tx.

    mats23
    mats23
    Associate III
    August 7, 2014
    Posted on August 07, 2014 at 22:53

    Hi,

    has there been any progress on this?

    /M

    Noppe.Jack
    Noppe.Jack
    Senior
    August 15, 2014
    Posted on August 15, 2014 at 20:31

    I just updated to the latest version of STM32Cube (which use Stegger 524b libraries) and the problem persists.

    Out of desperation, I implemented

    HAL_LTDC_ErrorCallback(LTDC_HandleTypeDef *hltdc)

    and I get

    hltdc->ErrorCode == HAL_LTDC_ERROR_FU (Frame Under run)

    This error happens on the line:

     HAL_LTDC_ConfigLayer(&hltdc, &layer_cfg, LayerIndex); //when LayerIndex = 0

    In : LCD_LL_LayerInit(uint32_t LayerIndex)

    Of: LCDConf_stm32f429i_disco_MB1075.c

    Is the frame under run error a red-herring, and if not, any suggestions on configuration variables that would help correct this?

    franck23
    franck23
    Associate III
    May 6, 2015
    Posted on May 06, 2015 at 11:02

    Hello

    Any update on the landscape bug?

    I have seen more threads reporting this issue, but we still don't know what the problem is.

    From Heisenberg answer, I do understand that the landscape mode is not possible (available?).

    It would be interesting to know where the problem comes from, so when starting a new project we can choose the right hardware and firmware to avoid getting stuck with a portrait orientation.

    Is it related to the ST implementation of emWin? Or is it the LCD driver?

    Would it be the same problem with a different LCD controller?

    etc...

    Thanks for any hint,

    Franck.

    eraycanli
    eraycanli
    Associate III
    September 28, 2015
    Posted on September 28, 2015 at 15:11

    any solution to this problem so far??

    reserv70
    reserv70
    Associate II
    October 1, 2015
    Posted on October 01, 2015 at 19:54

    Hi! I try to change orentation of diplay in stm32f429-disco but take same bag (atrifaction) on display. 

      What is the problem??  I have last version of HAL.  How can I solve this problem? It is library problem or driver problem? 

    alessandro23
    alessandro23
    Visitor II
    March 5, 2016
    Posted on March 05, 2016 at 15:20

    Hello,

    I experimented quite the same problem.

    While trying to rotate the screen on the STM32F429Disco with the GUIDRV_LIN_OSX_32 driver, images appear overlapped and/or with strange patterns in some zones.

    I was able to solve the problem by changing code in the file “

    LCDConf_stm32f429i_disco_MB1075.c

    �. I’m not sure, but I think there is a bug there.

    Here is my solution. In function “LCD_X_DisplayDriver�, I changed the following lines:

    case LCD_X_SETSIZE:

        GUI_GetLayerPosEx(LayerIndex, (int*)&xPos, (int*)&yPos);

        layer_prop[LayerIndex].xSize = ((LCD_X_SETSIZE_INFO *)pData)->xSize;

        layer_prop[LayerIndex].ySize = ((LCD_X_SETSIZE_INFO *)pData)->ySize;

        HAL_LTDC_SetWindowPosition(&hltdc, xPos, yPos, LayerIndex);

        break;

    to the followings:

      case LCD_X_SETSIZE:

        GUI_GetLayerPosEx(LayerIndex, (int*)&xPos, (int*)&yPos);

        if( LCD_GetSwapXYEx(LayerIndex) )

         {

           layer_prop[LayerIndex].xSize = ((LCD_X_SETSIZE_INFO *)pData)->ySize;

           layer_prop[LayerIndex].ySize = ((LCD_X_SETSIZE_INFO *)pData)->xSize;

         }

         else

          {

            layer_prop[LayerIndex].xSize = ((LCD_X_SETSIZE_INFO *)pData)->xSize;

            layer_prop[LayerIndex].ySize = ((LCD_X_SETSIZE_INFO *)pData)->ySize;

          }

        HAL_LTDC_SetWindowPosition(&hltdc, xPos, yPos, LayerIndex);

        break;

    Now everything is correctly displayed.

    Hope this will help other people to correct their problem.

    Kind Regards,

    Alessandro

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