节水灌溉-单片机-AT89C52-硬件设计-软件设计-毕业论文.doc

1.1 研究背景...............................................................................................................1

1.2 国内外智能节水灌溉技术发展状况...................................................................1

1.3 本课题的设计目标...............................................................................................2

2.1 系统总体设计.......................................................................................................3

2.2 操作界面设计及系统功能说明...........................................................................4

3.2 时钟电路及复位电路设计.................................................................................14

3.3 人机对话接口电路的设计.................................................................................15

3.4 数据采集电路设计.............................................................................................18

3.5 数据存储芯片接口电路设计.............................................................................19

3.6 输出驱动电路设计.............................................................................................21

3.7 电源模块设计.....................................................................................................22

3.8 系统硬件电路图.................................................................................................22

4.3 系统时钟程序设计.............................................................................................25

4.4 键盘扫描程序设计.............................................................................................29

4.5LED 动态显示程序设计.....................................................................................30

4.6TLC549 的驱动 ...................................................................................................32

4.9AT24C16 的编程.................................................................................................33