基于USB的开关量扩展设计与开发讲解.docxVIP

唐 山 学 院 毕 业 设 计 设计题目：基于USB的串行接口的开关量扩展设计与开发 系 别： 智能与信息工程学院 班 级： 12电气工程及其自动化（1）班 姓　 　名： 指 导 教 师： 关榆君 2016年5月31 日基于USB的串行接口的开关量扩展设计与开发 摘 要 USB（Universal Serial Bus，通用串行总线）是一种广泛应用于PC领域的接口技术，用于规范电脑与外部设备的连接和通讯。USB的串行接口的开关量的扩展集计算机技术、接口技术、设备驱动技术、编程技术以及相关调试检测技术等多种前沿技术于一体。其目的是通过实验感受电子信息技术在实际中的应用，具体把握相关专业知识，达到将学习到的课本知识具体化、实用化。 本课题以通用串行接口总线为基础，讨论了USB的体系结构、工作原理、通信协议和相应的核心技术，并介绍了一种基于USB的串行接口的开关量的扩展设计方案。同时在VB6.0(Visual Basic6.0)的操作平台上，实现与USB串行接口的通信，使其充分完成接口的扩展，实现了外部信号通过USB串行口在PC上得到了显示，I/O开关量通过VB反馈到硬件上得到开关量的扩展。 关键词：USB 设备驱动 I/O开关量 VB  Design and Development of the Serial Interface Based on USB Abstract USB (Universal Serial Bus) is a widely applied in the field of PC interface technology, used for specification computer connections and communications with external devices.And USB serial interface of the switch quantity expansion set computer technology, interface technology, debugging device drivers, programming technology and the related detection technology, and other cutting-edge technology in a body.Its purpose is to feel the electronic information technology through the experiment in the actual application, the specific master relevant professional knowledge, to learn the textbook knowledge of specific and practical. This topic is based on universal serial interface bus, discussed the system structure, working principle, the USB communication protocol and the corresponding core technology, and introduces a kind of serial interface based on USB extension design scheme of the switch quantity.At the same time in VB6.0 by use of the operating platform, with USB serial interface communication, make its fully completed the expansion of the interface, realize the external signal via USB serial port in PC, according to the amount of I/O switch switch quantity is obtained by VB feedback to the hardware extension. Key words: USB; device driver; I/O switch; VB  目录 1 引言 1