用设置坐标点的方式和用开窗函数设置窗口画出的图形不一样啊？不知怎么回事啊

玩转STM32001

以下是两个函数 屏为 320X240    水平X 方向递增  纵向Y地址递增
void LCD_SetDisplayWindow(u8 Xpos, u16 Ypos, u8 Height, u16 Width)
{
  /* Horizontal GRAM Start Address */
  if(Xpos >= Height)
  {
    LCD_WriteReg(R80, (Xpos - Height + 1));
  }
  else
  {
    LCD_WriteReg(R80, 0);
  }
  /* Horizontal GRAM End Address */
  LCD_WriteReg(R81, Xpos);
  /* Vertical GRAM Start Address */
  if(Ypos >= Width)
  {
    LCD_WriteReg(R82, (Ypos - Width + 1));
  }  
  else
  {
    LCD_WriteReg(R82, 0);
  }
  /* Vertical GRAM End Address */
  LCD_WriteReg(R83, Ypos);
  LCD_SetCursor(Xpos, Ypos);
}

void LCD_DrawPicture(const u8* picture)
{
  int index;
  LCD_SetCursor(0x00, 0x0000);
  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */
  for(index = 0; index < 76800; index++)
  {
    LCD->LCD_RAM = picture[2*index+1]<<8|picture[2*index];
  }
}

玩转STM32001

找到原因了啊  两个参数调用错了啊