【摘要】 大多数单片机只有一个串口,使其在许多场合的应用受到限制。在分析串口扩展原理及现有串口扩展方法基础上,提出了用单片机作为接口芯片扩展单片机串口,实现多串口设备集成的方案。经实验验证,该方案通信可靠,满足系统要求,对串口扩展及其他接口设计均有一定的启迪作用和较高的参考价值。更多还原

【Abstract】 Most of single chip are limited in many applications, for it has only one serial interface. Based on analyzing the principle and the method of serial interface extend, put forward the new thinking which using the single chip as the interface chip to extend the serial interface, and integrating more serial port devices. It’s testified that it communicates reliably, satisfies the request of system, there are some edificatory effect and great referenced value in serial interface extend and other interface design.更多还原