提出了一种利用通用I/O口实现串行异步通讯的方法，该方法接口简单，程序实现方便，特别适合各种单片机应用系统。
Serial asynchronous communication can be realized through universal I/O interface. The simple connection and considerate programming aim at various SCM application systems.
本文详述了使用VB和C51实现PC机和单片机串行通信的开发方法，并简要地介绍了VB通讯控件及其使用方法，给出了调试程序。
The paper states the method which is used to develop serial communication for MCU and PC with programming tools VB and C51.
即系统体系结构、系统整体工作流程、软件控制系统的设计、串行通讯的程序设计以及单片机的功能控制。
Such as system-configuration, whole system task flow, the design of software control system, the programmer for serial communication and the control for single chip.
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