USB串口和RS232串口协议转换接口设计.docVIP

桂林理工大学博文管理学院 毕业设计(论文) 题目：USB串口和RS232串口协议转换接口设计 二级学院： 专业(方向)： 班 级： 学 生： 指导教师： 2015 年 5月 5 日 摘 要 社会的发展，科技的进步，普通RS232接口打印机并行接口已经逐步被淘汰取而代之的是USB接口是一种快速、灵活的总线接口与其它通信接口比较，的最大特点是使用，这是USB的主要设计目标。AT89C52单片机开发 本系统AT89C52单片机并口通讯编程来实现USB 虚拟串口功能，最终可以通过操作这个虚拟串口来完成设备和电脑数据交互。关键词AT89C52；PIDUSBD12；USB； The Design of Temperature Controller Student:He Di Teacher:Cheng Xiao_hui Abstract: With the social development and the advancement of technology, Ordinary RS232 interfaces and printer parallel interface has been phased out, replaced by a USB interface, USB interface is a fast, flexible bus interface, and other communications interface comparison, the biggest feature is easy to use USB interface, which is the main USB design goals. Now in some laptop computers and brand are no longer equipped with standard serial port. However, a large number of application development, especially for embedded development more closely linked with the underlying hardware development, we need to use the serial port, so the market there has been a lot of USB-to-serial devices. USB reason so widely used is because it has a connection is simple, fast, scalable, and hot-swappable operation uniform standards and so on. This paper describes the 51 microcontroller based hardware design and the software development process. The system is composed PDIUSBD12 USB interface chip and 51 microcontroller with parallel communication programming to achieve USB virtual serial port function, Final by operating the virtual serial port to complete the equipment and computer data exchange. Key words：AT89C52；PIDUSBD12；USB目　次 摘 要 II Abstract III 绪 论 1 1系统总体设计方案 2 1.1方案设计具体思路 2 1.2方案设计总体框图 2 2 硬件部分 3 2.1 主控制芯片AT89C52 3 2.11 AT89