原飞利浦usb host芯片ISP1160的开发板程序包。包含usb协议栈，hcd、hal、usbd等源代码。这个程序包含同步传输、批量传输、中断传输等实例。-Original Philips ISP1160 chip usb host development board package. Usb protocol stack includes, hcd, hal, usbd such as source code. This procedure contains the asynchronou

对串行总线及其协议作了总结，然后在此基础上对USB协议进行了深 入的分析，并针对协议的要求，对字段、包、数据传输事务、数据切换同步以及错误 检测等的实现进行了详细设计 -On the serial bus and protocol are summarized, and then on the basis of the USB protocol conducted in-depth analysis, and the requirement for agreement on the