SL811H的驱动，实现USB Host功能，Slave功能没有实现。此驱动已经测试过，速度在每秒20KB以上，速度主要与硬件条件有关。-SL811H drive to achieve USB Host function, Slave function did not materialize. This driver has been tested, the speed of 20KB per second more than the speed of the main and hardware