在ADS环境下开发的基于2440平台的USB Host程序，可以读写U盘，能够枚举USB Keyboard ，Usb Mouse，Usb Camera,Usb to serious等设备，是学习USB Host的绝佳资料-ADS development environment based on the 2440 platform USB Host program can read U disk, able to enumerate USB Keyboard, Usb Mouse, Usb Cam