emWin: Problem with STM32F746 Disco board

[mfrank9]

Posted on August 20, 2016 at 17:48

Hello

I have a STM32F429I-Eval boardand a STM32F746 Disco board.I want to use StemWin with the GuiBuilder.On both Boards I use the ''Hello World'' Examples as templates.On the STM32F429I-Eval the Dialog are shown correctly.But when I want to show a dialog on the STM32F746 Disco,the content of the dialog are not shown correctly (see the first Picture below).But the Widgets outside the dialog are shown correctly.Another thing which don�t work on the STM32F746 Disco board but works on the STM32F429I-Eval boardis the ''alpa blending'' example from the emWin Manuel (Picture 2 and 3).Maybe someone can help me.Picture 1Picture 2Picture 3 #stemwin #stm32f746-disco

[slimen]

Posted on August 22, 2016 at 16:10

Hello frank.matthias,

In the main, the display issue may be caused by one of the following: - Stack size is too low. - Wrong initialization of the display controller. - Wrong configuration of the display interface. Regards

ForumSTM32

[mfrank9]

Posted on August 25, 2016 at 22:09

Hi

-I have increased the steak size to 0x1000 but with the same result.-I think that the lcd timings are correctly.I have tested the lcd with the timings from the example and the timings from this link:http://microelk.azurewebsites.net/STM32_STEmWin/STM32_STEmWin Both are working. But dialogs and alpha don?t work.-The display interface in the example are#define COLOR_CONVERSION_0 GUICC_M8888I#define DISPLAY_DRIVER_0   GUIDRV_LIN_32I am not sure if that ist correctly. The Display have 8bit for each of the 3 colors.Should it be GUIDRV_LIN_24?But when i change them the display dont?t work.Another example:Picture 1 shows how it should be.Picture 2 shows how it is.You can see that the ''GUI_TM_XOR'' are not shown correctlybut the other things worksPerhaps is the problem the same as in the display of dialoges.Picture 1:Picture 2:

[mfrank9]

Posted on August 25, 2016 at 23:07

I have found the problem!!

The right driver is#define COLOR_CONVERSION_0 GUICC_M888#define DISPLAY_DRIVER_0   GUIDRV_LIN_24But to use them the following code must be changed in the LCDconf.c:static inline U32 LCD_LL_GetPixelformat(U32 LayerIndex){  if (LayerIndex == 0)  {    return LTDC_PIXEL_FORMAT_ARGB8888;  }   else  {    return LTDC_PIXEL_FORMAT_ARGB1555;  } }change them to:static uint32_t LCD_LL_GetPixelformat(uint32_t LayerIndex){  const LCD_API_COLOR_CONV * pColorConvAPI;  if (LayerIndex >= GUI_NUM_LAYERS)   {    return 0;  }  pColorConvAPI = layer_prop[LayerIndex].pColorConvAPI;    if (pColorConvAPI == GUICC_M8888I)   {    return LTDC_PIXEL_FORMAT_ARGB8888;  }   else if (pColorConvAPI == GUICC_M888)   {    return LTDC_PIXEL_FORMAT_RGB888;  }   else if (pColorConvAPI == GUICC_M565)   {    return LTDC_PIXEL_FORMAT_RGB565;  }   else if (pColorConvAPI == GUICC_M1555I)   {    return LTDC_PIXEL_FORMAT_ARGB1555;  }   else if (pColorConvAPI == GUICC_M4444I)   {    return LTDC_PIXEL_FORMAT_ARGB4444;  }   else if (pColorConvAPI == GUICC_8666)   {    return LTDC_PIXEL_FORMAT_L8;  }   else if (pColorConvAPI == GUICC_1616I)   {    return LTDC_PIXEL_FORMAT_AL44;  }   else if (pColorConvAPI == GUICC_88666I)   {    return LTDC_PIXEL_FORMAT_AL88;  }  while (1);}