TouchGFX image rendering issue on STM32H757XIH6 (LTDC ARGB8888)

[rahulz916]

Hi Everyone,
I’m working with a custom 24-bit display on an STM32H757XIH6 MCU.
I’ve configured the LTDC with pixel format ARGB8888.

When I test with solid fill colors, everything displays perfectly.
However, when I try to display an image using TouchGFX Designer, the output appears as repeated, tiled, and shifted blocks instead of the correct image.

I’ve attached a photo of the display for reference.

Has anyone faced this issue before, or could guide me on how to resolve it please

?

Thank you in Advanceshifted blocks

/* LTDC init function */
void MX_LTDC_Init(void)
{

  /* USER CODE BEGIN LTDC_Init 0 */
	HAL_GPIO_WritePin(LCD_BL_GPIO_Port, LCD_BL_Pin, GPIO_PIN_SET);
  /* USER CODE END LTDC_Init 0 */

  LTDC_LayerCfgTypeDef pLayerCfg = {0};

  /* USER CODE BEGIN LTDC_Init 1 */

  /* USER CODE END LTDC_Init 1 */
  hltdc.Instance = LTDC;
  hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
  hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
  hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
  hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
  hltdc.Init.HorizontalSync = 19;
  hltdc.Init.VerticalSync = 2;
  hltdc.Init.AccumulatedHBP = 179;
  hltdc.Init.AccumulatedVBP = 25;
  hltdc.Init.AccumulatedActiveW = 1203;
  hltdc.Init.AccumulatedActiveH = 625;
  hltdc.Init.TotalWidth = 1363;
  hltdc.Init.TotalHeigh = 637;
  hltdc.Init.Backcolor.Blue = 0;
  hltdc.Init.Backcolor.Green = 0;
  hltdc.Init.Backcolor.Red = 0;
  if (HAL_LTDC_Init(&hltdc) != HAL_OK)
  {
    Error_Handler();
  }
  pLayerCfg.WindowX0 = 0;
  pLayerCfg.WindowX1 = 1024;
  pLayerCfg.WindowY0 = 0;
  pLayerCfg.WindowY1 = 600;
  pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB8888;
  pLayerCfg.Alpha = 255;
  pLayerCfg.Alpha0 = 255;
  pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
  pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
  pLayerCfg.FBStartAdress = 0xD0000000;
  pLayerCfg.ImageWidth = 1024;
  pLayerCfg.ImageHeight = 600;
  pLayerCfg.Backcolor.Blue = 0;
  pLayerCfg.Backcolor.Green = 0;
  pLayerCfg.Backcolor.Red = 0;
  if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN LTDC_Init 2 */

  /* USER CODE END LTDC_Init 2 */

}

[LouisB]

Hello @rahulz916,

Have you check the rest of the configuration according to your screens specs? (In the CubeMX LTDC panel)

BR,

[rahulz916 · Accepted solution]

The issue was related to the SDRAM clock, but it's been resolved now.

Thanks @LouisB