void LTDC_DMA2D_Fill_Color(uint16_t start_x, uint16_t start_y, uint16_t end_x, uint16_t end_y, uint16_t *color)
{
  
  #define LTDC_FRAMEBUF_ADDR    0xc0000000; //显存基地址
  #define TFT_WEIGHT            800         //屏幕宽
  #define TFT_WIDTH             480         //屏幕高
  
  DMA2D_InitTypeDef      DMA2D_InitStruct;
  
  uint32_t  Xaddress = 0;                 //显存填充地址
  uint32_t timeout=0;                     //超时
  uint16_t  OutputOffset;                 //地址偏移
  uint16_t  NumberOfLine;                 //填充行数
  uint16_t  PixelPerLine;                 //每行像素
         
  Xaddress = 0xc0000000 + 2* (800 * start_y + start_x); //计算填充显存地址
  OutputOffset = 800-(end_x-start_x+1);                 //计算偏移地址
  NumberOfLine = end_x-start_x+1;                       //计算填充行数
  PixelPerLine = end_y-start_y+1;                       //计算每行像素

  /* 配置 DMA2D */
  DMA2D->CR&=~(DMA2D_CR_START);                   //先停止DMA2D
  DMA2D->CR=DMA2D_M2M;                            //存储器到存储器模式
  DMA2D->FGPFCCR=DMA2D_RGB565;                    //设置颜色格式
  DMA2D->FGOR=0;                                  //前景层行偏移为0
  DMA2D->OOR=OutputOffset;                        //设置行偏移

  DMA2D->FGMAR=(uint32_t)color;                   //源地址
  DMA2D->OMAR=Xaddress;                           //输出存储器地址
  DMA2D->NLR=(PixelPerLine)|(NumberOfLine<<16);   //设定行数寄存器
  DMA2D->CR|=DMA2D_CR_START;                      //启动DMA2D
  
  while((DMA2D->ISR&(DMA2D_FLAG_TC))==0)          //等待传输完成
  {
          timeout++;
          if(timeout>0X1FFFFF)break;              //超时退出
  }
  DMA2D->IFCR|=DMA2D_FLAG_TC;                     //清除传输完成标志

}

static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
{
    /*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/

    LTDC_DMA2D_Fill_Color(area->x1, area->y1, area->x2, area->y2, (uint16_t*)color_p);

    /*IMPORTANT!!!
     *Inform the graphics library that you are ready with the flushing*/
    lv_disp_flush_ready(disp_drv);
}