STM32F429的LTDC控制器刷屏幕慢怎么办啊

mokart

我的屏幕是480*272的屏幕 在切换图片的时候，屏幕会闪烁  显示图片的函数是
[mw_shl_code=applescript,true]
/**
  * @brief  Displays a bitmap picture loaded in the internal Flash.
  * @param  BmpAddress: Bmp picture address in the internal Flash.
  * @retval None
  */
void LCD_WriteBMP(uint32_t BmpAddress)
{
  uint32_t index = 0, size = 0, width = 0, height = 0, bit_pixel = 0;
  uint32_t Address;
  uint32_t currentline = 0, linenumber = 0;

  Address = CurrentFrameBuffer;

  /* Read bitmap size */
  size = *(__IO uint16_t *) (BmpAddress + 2);
  size |= (*(__IO uint16_t *) (BmpAddress + 4)) << 16;
  
  /* Get bitmap data address offset */
  index = *(__IO uint16_t *) (BmpAddress + 10);
  index |= (*(__IO uint16_t *) (BmpAddress + 12)) << 16;

  /* Read bitmap width */
  width = *(uint16_t *) (BmpAddress + 18);
  width |= (*(uint16_t *) (BmpAddress + 20)) << 16;

  /* Read bitmap height */
  height = *(uint16_t *) (BmpAddress + 22);
  height |= (*(uint16_t *) (BmpAddress + 24)) << 16;

  /* Read bit/pixel */
  bit_pixel = *(uint16_t *) (BmpAddress + 28);  

  if (CurrentLayer == LCD_BACKGROUND_LAYER)
  {
    /* reconfigure layer size in accordance with the picture */
    LTDC_LayerSize(LTDC_Layer1, width, height);
    LTDC_ReloadConfig(LTDC_VBReload);

    /* Reconfigure the Layer pixel format in accordance with the picture */   
    if ((bit_pixel/8) == 4)
    {
      LTDC_LayerPixelFormat(LTDC_Layer1, LTDC_Pixelformat_ARGB8888);
      LTDC_ReloadConfig(LTDC_VBReload);
    }
    else if ((bit_pixel/8) == 2)
    {
      LTDC_LayerPixelFormat(LTDC_Layer1, LTDC_Pixelformat_RGB565);
      LTDC_ReloadConfig(LTDC_VBReload);
    }
    else
    {
      LTDC_LayerPixelFormat(LTDC_Layer1, LTDC_Pixelformat_RGB888);
      LTDC_ReloadConfig(LTDC_VBReload);
    }
  }
  else
  {
    /* reconfigure layer size in accordance with the picture */
    LTDC_LayerSize(LTDC_Layer2, width, height);
    LTDC_ReloadConfig(LTDC_VBReload);
   
    /* Reconfigure the Layer pixel format in accordance with the picture */
    if ((bit_pixel/8) == 4)
    {
      LTDC_LayerPixelFormat(LTDC_Layer2, LTDC_Pixelformat_ARGB8888);
      LTDC_ReloadConfig(LTDC_VBReload);
    }
    else if ((bit_pixel/8) == 2)
    {
      LTDC_LayerPixelFormat(LTDC_Layer2, LTDC_Pixelformat_RGB565);
      LTDC_ReloadConfig(LTDC_VBReload);
    }
    else
    {
      LTDC_LayerPixelFormat(LTDC_Layer2, LTDC_Pixelformat_RGB888);
      LTDC_ReloadConfig(LTDC_VBReload);  
    }
  }

  /* compute the real size of the picture (without the header)) */  
  size = (size - index);

  /* bypass the bitmap header */
  BmpAddress += index;

  /* start copie image from the bottom */
  Address += width*(height-1)*(bit_pixel/8);
  
  for(index = 0; index < size; index++)
  {
    *(__IO uint8_t*) (Address) = *(__IO uint8_t *)BmpAddress;
   
    /*jump on next byte */   
    BmpAddress++;
    Address++;
    currentline++;
   
    if((currentline/(bit_pixel/8)) == width)
    {
      if(linenumber < height)
      {
        linenumber++;
        Address -=(2*width*(bit_pixel/8));
        currentline = 0;
      }
    }
  }
}[/mw_shl_code]

应该是官方库自己带的函数。  有人遇到过类似的问题的么？求帮助~

mokart

顶一个

正点原子

我们例程没这个问题哦