目录摘要................................................................11 引言.............................................................21.1 数据采集系统简介...............................................21.2 课程设计内容和规定.............................................31.3 设计工作任务及工作量规定.......................................32 内容提纲.........................................................33 系统总体方案.....................................................33.1 系统设计思路...................................................33.2 系统总体框图...................................................44 硬件电路设计及描述...............................................44.1 8253 芯片及工作原理............................................44.1.1 基本构成及工作原理...........................................44.1.2 8253 与系统连接..............................................54.2 ADC0809 内部功能与引脚简介......................................54.2.1 引脚排列及各引脚功能.........................................64.2.2 ADC0809 工作方式.............................................74.2.3 ADC0809 与系统连接...........................................84.3 单片机 89C51 引脚与功能简介.....................................84.4 8255 并行口芯片基本构成及工作原理.............................104.4.1 8255 内部构造...............................................114.4.2 8255 工作方式...............................................124.2.3 8255 与系统连接.............................................124.5 LED 显示某些接线及工作原理....................................134.5.1 LED 显示工作原理............................................134.5.2 LED 显示某些接线............................................144.6 总体电路图.....................................................145 软件设计流程及描述..............................................155.1 主程序设计思路................................................155.2 某些程序设计流程图........................
