This dissertation is subjected to achieving the communication between PC and peripherals, through the design and implementation of USB test system, so as to know the inherent mechanism of USB communication.

• 本文以建立主机和外设通信为主题，通过USB实验系统的研制，了解USB通信的内在机制，在此基础上，进一步开发基于USB的数据采集系统。