基于VB的主从机串行通信系统设计

串行通信是数据采集系统中最常用的通信手段之一。设计并研制了基于VB的LED大屏幕显示串行数据通信系统,具有编程灵活、控制通信对象容易的优点。通过8250的奇偶校验位与单片机的SM2位的配合,实现了PC机与多个单片机的串行数据通信。介绍了基于VB6.0进行串行通信的流程和编程,较好地解决了同时使用通信方式0与方式1时引起的RXD端口的冲突问题。实验证明,该设计简单、实用,提高了系统设计的效率。

Design for serial communication of master/slave computer based on VB

Serial communication plays an essential role in data acquisition system. It is convenient and efficient to realize serial data communication by using communication control of VB\{6.0\}, comparing with other programming methods. Serial data communication system for LED displaying between PC and multi\|microcomputer is designed through the collaboration of parity\|bit of 8250 and SM\-2 of 8031. The flow chart and some programming skill based on VB6.0 are introduced in detail. The confliction between communication mode 0 and mode 1 is solved when they are used simultaneously. The experimental result shows that easy and practical design can increase the efficiency of system design.