本文档是为单片机初学者写的有关串口通讯编程的说明文档。使用的单片机硬件是最通用的AT89C51单片机，编程语言为c语言。本文档不是系统的介绍单片机知识的教程，而是为了使您尽快掌握串口编程方法的技术说明。-This document is written for beginners microcontroller serial communication programming documentation. Using microcontroller hardware is the most common AT89C51 microcontroller, programming language for the c language. This document is not systematic introduction tutorial microcontroller knowledge, but in order for you to quickly grasp the technical descr iption of the serial programming method.