Filling Buffer with DMA2D in L8 color format draws one and skips one pixel.

[chaari]

Hello community,

I am using NUCELOH7A3 and a 800x320 display. I could fill the screen, display lines and texts using RGB565 and ARGB8888. Now I wanted to use the L8 forrmat with a LUT.

Using the the DMA2D mode Memory to Memory works fine (array)! But using the mode Register to Memory does not.

BSP_LCD_WritePixel() works fine with the L8 format. But the BSP_LCD_FillRect() that uses DMA2D has some problems.

It displays verticle lines, displaying 1 line and skipping 1 line after. So it writes the pixel and skips the one after.

 

Here is the code.

 

int32_t BSP_LCD_FillRect(uint32_t Instance, uint32_t Xpos, uint32_t Ypos, uint32_t Width, uint32_t Height, uint32_t Color)
{
 uint32_t Xaddress;

 /* Get the rectangle start address */
 Xaddress = (hlcd_ltdc.LayerCfg[Lcd_Ctx[Instance].ActiveLayer].FBStartAdress) + (Lcd_Ctx[Instance].BppFactor*((Lcd_Ctx[Instance].XSize*Ypos) + Xpos));

 /* Fill the rectangle */
 LL_FillBuffer(Instance, (uint32_t *)Xaddress, Width, Height, (Lcd_Ctx[Instance].XSize - Width), Color);
 return BSP_ERROR_NONE;
}

 

 

static void LL_FillBuffer(uint32_t Instance, uint32_t *pDst, uint32_t xSize, uint32_t ySize, uint32_t OffLine, uint32_t Color)
{
 uint32_t output_color_mode, input_color = Color;

 switch(Lcd_Ctx[Instance].PixelFormat)
 {
 case LCD_PIXEL_FORMAT_RGB565:
 output_color_mode = DMA2D_OUTPUT_RGB565; /* RGB565 */
 input_color = CONVERTRGB5652ARGB8888(Color);
 break;
 case LCD_PIXEL_FORMAT_L8:
 output_color_mode = DMA2D_OUTPUT_ARGB8888; /* RGB565 */
 hlcd_dma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_L8;
 break;
 case LCD_PIXEL_FORMAT_RGB888:
 default:
 output_color_mode = DMA2D_OUTPUT_ARGB8888; /* ARGB8888 */
 break;
 }

 /* Register to memory mode with ARGB8888 as color Mode */
 hlcd_dma2d.Init.Mode = DMA2D_R2M;
 hlcd_dma2d.Init.ColorMode = output_color_mode;//DMA2D_OUTPUT_ARGB8888;
 hlcd_dma2d.Init.OutputOffset = OffLine;

 hlcd_dma2d.Instance = DMA2D;

 /* DMA2D Initialization */
 if(HAL_DMA2D_Init(&hlcd_dma2d) == HAL_OK)
 {
	 if(HAL_DMA2D_ConfigLayer(&hlcd_dma2d, 1) == HAL_OK)
	 {
		if (HAL_DMA2D_Start(&hlcd_dma2d, input_color, (uint32_t)pDst, xSize, ySize) == HAL_OK)
		{
		 /* Polling For DMA transfer */
		 (void)HAL_DMA2D_PollForTransfer(&hlcd_dma2d, 100);
		}
	 }
 }
}

 

 

 Am I missing something? Thanks for your help!