课程设计（论文）-基于51单片机的串口通信设计与实现

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1、桂林电子科技大学课程设计（论文）报告用纸第22页共14页课程设计(论文)说明书题目：基于51单片机的串口通信设计与实现院（系）：信息与通信学院专业：通信工程学生姓名：学号：指导教师：职称：2011年12月12日桂林电子科技大学课程设计（论文）报告用纸第22页共14页摘要目前，单片机在双机通信领域应用很广。但研究最多的是上位机与下位机的通信及多单片机构成的主从式多机通信系统。本文重点研究了多单片机的平权式多机通信，使各单片机有相同的权限。本文从平权式多机通信协议入手，首先设计了具体平权式多机通信协议

2、;主机通信用按键控制，模拟实际应用中的触发信号输入。对于1号单片机，还可通过液晶实时显示工作状态，初始为主机。在不需置其他单片机为主机的情形下，本多机通信系统可以作为主从式多机通信系统。从机通信模式通过串口中断触发启动，通信结束即恢复之前的从机状态。通信过程中，主机先发送寻址的从机号，待从机响应后开始通信。通信结束后，主机发送自己的主机号，告知从机。然后从机发给主机校验字节数据，主机检验错误，检验无误后，作出响应，1号单片机液晶会显示，2号和3号单片机收发数据无误后会使LED指示灯亮起。其外，本文

3、研究了可切换双向接口的实现方法。通过用单片机的一个引脚控制单片机的串口的连接方式，使其工作在主机模式或从机模式。本研究已经仿真通过，真实可行。具有一定的检错能力，串行通信的比特率是9600bit/s，通信速度较快，且可靠性高。本研究通过硬件电路解决了通信过程中多单片机争用主机权的问题。关键词：单片机；双机通信；平权；AT89S52桂林电子科技大学课程设计（论文）报告用纸第22页共14页目录引言···················································31

4、单片机多机通信实现··································31.1本课题的研究内容············································32单片机多机通信理论及方案选择·······················42.1单片机串口通信··············································42.1.1单片机串口介绍···········································

5、42.1.2单片机串口控制寄存器····································42.1.3单片机串口的四种工作方式··································52.2单片机多机通信方案选择······································62.3微处理器的选择···············································62.4液晶LCD1602介绍·····················

6、····················73单片机多机通信协议设计·····························74硬件电路设计·······································84.1单片机最小系统的设计········································84.2桂林电子科技大学课程设计（论文）报告用纸第22页共14页键盘电路设计··············································94.3

7、液晶显示电路设计··············································95软件设计··············································95.1单片机的程序设计················································95.2键盘程序设计···················································106结论···················

8、·······························11致谢····················································12参考文献····················································13附录一：仿真电路···········································14附录二：原理图····································