一种51单片机分时控制片外设备的实现方法  

An Implementation Method of Off Chip Device for 51 MCU Time Sharing Control

作　　者：苑香平 唐得志 杨英南 YUAN Xiang-ping;TANG De-zhi;YANG Ying-nan(School of Electrical and Information Engineering,Anhui University of Technology,Ma'anshan 243000,China)

机构地区：[1]安徽工业大学电气与信息工程学院,安徽马鞍山243000

出　　处：《江苏理工学院学报》2018年第2期69-72,94,共5页Journal of Jiangsu University of Technology

基　　金：国家级大学生创新创业训练计划项目(SRTP)(201710360068);<安徽省高校自然科学重点项目>(KJ2016A094)

摘　　要：从硬件电路设计和软件程序设计2个方面论述了51单片机在外部设备多样化且开发板空间有限的情况下,利用I/O控制口,通过译码器芯片进行扩展,同时改变编程方式,进一步简化程序设计,从而实现对外部设备的分时控制。借助该方法可使用较少的I/O口,分时控制较多的外部设备,进而优化开发板的资源布局,提高其空间利用率。This paper,from the hardware design and software design,discussed that under the circumstances of diversified external devices and limited development board space,through I/O ports,51 single chip microcomputer can extend through the decoder chip,change the programming way,further simplify the program design,so as to realize the time-sharing control of external devices.With the help of this method,we can use less I/O port and control more external equipment in time,and then optimize the resource layout of the development board and improve the utilization ratio of space.

关 键 词：51单片机 多样化 I/O控制 译码扩展 分时控制 空间利用率 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]