自制RS485/RS232转换器实现PC机和单片机之间的串行通信

Serial Communication Between PC and MCU Using Special Designed RS485/S232 Converter

ＲＳ４８５是一种具有高抗干扰能力、适合远距离通信的串行通信方式。作者在电参数测试议的设计中，采用自制的ＲＳ４８５／ＲＳ２３２转换器实现了单片机和ＰＣ机之间的高速、远距离、高可靠的通信。文中详细叙述了单片机和ＰＣ机之间硬件接口电路的设计、ＲＳ４８５／ＲＳ２３２转换器的制作，以及软件设计时必须注意的一些问题。

RS485 serial commnication is provided witk high ability of anti-interference and fits for con- verting data long distance.By using special designed RS485/RS232 converter,the authors realize the high speed,long distance and highly reliable communicaion between PC and MCU.This paper discussed in detail the hardware of the interface circuit,the design of RS485/RS232 converter,and some questions during soft- ware design.