§1.2.2 电磁阀的种类及特点 ..............................................................................2
§1.3 多机串口通信技术简介 ....................................................................................4
§1.3.1 计算机网络结构简介 ..............................................................................4
§1.3.2 串口总线协议技术 .................................................................................6
§1.4 本文完成的工作 ................................................................................................8
第二章 多电磁阀控制系统总体方案设计 ...................................................................10
§2.1 系统总体方案设计 .........................................................................................10
§2.1.1 控制系统总体框图 ...............................................................................10
§2.1.2 系统的设计方案 ...................................................................................13
§2.2 目标器件选择 .................................................................................................14
§2.2.1 电磁阀控制器主芯片选择 ...................................................................14
§2.2.2 继电器选型 ...........................................................................................17
§2.2.3 RS-485 总线协议技术 .......................................................................... 18
§2.2.4 比例电磁阀的选型 ...............................................................................18
§2.3 系统设计中关键技术问题 ..............................................................................19
§2.4 本章小结 ..........................................................................................................20
第三章 基于 RS-485 总线电磁阀控制器硬件设计 .................................................... 21
§3.1 控制器最小系统设计 .....................................................................................21
§3.1.1 AT89S52 芯片简介 ................................................................................21
§3.1.2 MAX485 芯片介绍 ............................................................................... 23
§3.1.3 复位、时钟与电源电路设计 ...............................................................25
§3.2 控制器 PCB 板设计 ....................................................................................... 26
§3.2.1 电路板设计中常见问题 .......................................................................27
§3.2.3 控制器电路板制作 ...............................................................................30
§3.3 本章小结 .........................................................................................................32
第四章 软件设计与系统调试 .......................................................................................33
§4.1 单机通信控制模式 .........................................................................................33
§4.1.1 点对点控制器软件程序设计 ................................................................33
§4.1.2 点对点上位机通信程序设计 ...............................................................36
§4.1.3 单机通信控制调试 ...............................................................................39
§4.2 多机通信控制模式 .........................................................................................41
§4.2.1 点对多点控制器软件程序设计 ............................................................41
§4.2.2 点对多点上位机通信程序设计 ...........................................................44
§4.2.3 多机通信控制方式下系统调试 ...........................................................45
§4.3 本章小结 .........................................................................................................47
第五章 总结与展望 .......................................................................................................48
§5.1 结论 .................................................................................................................48
§5.2 展望 .................................................................................................................48
附录 .................................................................................................................................49
参考文献 .........................................................................................................................57
在读期间公开发表的论文及取得成果 .........................................................................59
致谢 .................................................................................................................................60