51单片机多功能计数器毕业论文01.doc

2008年山东省“ZLG杯”大学生电子设计竞赛Abstract  The design consists of power, MCU control module, before the signal to channel processing module, keyboard, LCD Module (A / D) converter modules, voice on several modules, temperature and clock module eight modules. AT89C52 MCU to control module for the control of the core, the counter-programmable control, and cycle, frequency, time interval measurement. At the same time can be realized on the measurement results, clock, temperature of the liquid crystal display and voice broadcast. Key words: cycle-time interval measurement frequency voice broadcast 目 录 摘要---------------------------------------------------------2 一 方案设计与论证--------------------------------------------------------4 计数法测量周期原理-------------------------------------------------4 计数法测量时间间隔原理---------------------------------------------5 总体设计方案比较与选择---------------------------------------------5 二 模块电路设计及比较----------------------------------------------------7 2.1 电源模块----------------------------------------------------------7 2.2 前向信号通道处理模块----------------------------------------------8 2.3液晶显示模块-------------------------------------------------------9 2.4 键盘控制模块------------------------------------------------------11 2.5 A/D转换模块 -----------------------------------------------------11 2.6 语音报温模块（发挥）----------------------------------------------12 2.7 时钟模块（发挥）--------------------------------------------------13 2.8 测温模块（发挥）--------------------------------------------------14 三 软件方案设计----------------------------------------------------------15 3.1主程序流程方框图--------------------------------------------------15 3.2语音播报程序方框图------------------------------------------------16 3.3 Keil C程序------------------------------------------------------17 四 数据处理---------------------------------------------------------------22 4.1 测试数据分析------------------------------------------------------22 4.2 实测中误差分析与处理----------------------------------------------22 五 电路原理图--------------------------