目 录
1 绪论..................................................................................................................................1
1.1 课题背景 ...................................................................................................................1
1.2 课题相关技术 ...........................................................................................................2
1.3 课题任务 ...................................................................................................................5
1.4 课题内容及安排 ........................................................................................................5
2 系统方案设计..................................................................................................................6
2.1 方案设计原则 ............................................................................................................6
2.2 方案选择 ...................................................................................................................6
3 系统硬件设计..................................................................................................................9
3.1 单片机模块 ................................................................................................................9
3.1.1 STC89C52RC 介绍............................................................................................10
3.1.2 单片机最小系统...............................................................................................12
3.2 输入输出模块 .........................................................................................................15
3.2.1 光电隔离模块...................................................................................................15
3.2.2 输入模块...........................................................................................................17
3.2.3 输出模块...........................................................................................................19
3.3 串口模块 .................................................................................................................21
3.4 设备选型 .................................................................................................................24
4 系统软件设计与实现....................................................................................................25
4.1 软件编程介绍 .........................................................................................................25
4.1.1 C 语言介绍 ........................................................................................................25
4.1.2 VB 介绍 .............................................................................................................26
4.2 下位机软件方案设计 .............................................................................................27
4.2.1 主程序设计部分................................................................................................28
4.2.2 初始化程序设计部分........................................................................................28
4.2.3 中断程序设计部分............................................................................................29
4.3 上位机软件方案设计 .............................................................................................31
