基于MAX1487芯片的远程多机通讯应用

The Application of Long-distance Multi Communication Based on MAX1487

文章介绍了美国ＭＡＸＩＭ公司的ＭＡＸ１４８７芯片在ＲＳ４８５标准接口中的应用，给出ＭＡＸ１４８７芯片的内部结构、管脚功能及其工作原理，并提供了其在ＰＣ机与单片机远程多机串行通讯的应用电路、通信原理、数据包协议、通讯程序流程图。另外，还介绍了单片机Ｃ５１编写的通讯软件及用Ｃ＋＋ Ｂｕｉｌｄｅｒ建立在Ｗｉｎｄｏｗ９８／９５环境下的计算机端通信软件的实现。

In this paper, the MAX1487 of American MAXIM Corp based on RS485 bus in some project are introduced briefly, and the design of inner structure including the function of pins and working principle, providing the application circuit, communication principle, data protocol, the flow chart of communication program between PC and singlechip in long-distance serial communication. In addition, the software of singlechip in language C51 and PC in C++ Builder is described in detail.