【正文】 eed odometer, let people can clearly know the current speed, mileage and other physical quantities, in addition, SCM has small size, high reliability and cheaper price. The design expounds the working principle, hardware position, main functions of each part and the software structure and implementation. Hardware includes main control module, data acquisition module, data processing module, display module and so on, Using the STC89C52 singlechip microputer as main control chip, using sensors on bicycle wheels to count, sending the signals collected by a certain time interval and the bike itself parameters to the single chip micropute. Finally Using single chip microputer to collect signal analysis and part in C language programming Adopting the idea of modular design, and debugging and simulation in the keil and proteus. Bicycle mileage speedometer design in line with safe, convenient and costeffective, humanized principle, can make modern life improved significantly. KEYWORDS:singlechip, LCD1602, Hall sensor, odometer 西安工程大學(xué)畢業(yè)設(shè)計論文 III 目 錄 第 1 章 緒 論 ........................................................................................................ 1 課題背景 ................................................................................................. 1 系統(tǒng)要求 ................................................................................................. 1 課題實現(xiàn)方法 ......................................................................................... 2 第 2 章 系統(tǒng)框圖及方案介紹 .............................................................................. 3 總體方案比較 ......................................................................................... 3 總體方案選擇 ......................................................................................... 3 系統(tǒng)總體框圖 .............................................................................. 3 系統(tǒng)總體設(shè)計 .............................................................................. 3 各模塊設(shè)計與選擇 ................................................................................. 4 單片機(jī)的選擇 .............................................................................. 4 顯示模塊的選擇 .......................................................................... 5 傳感器的選擇 .............................................................................. 5 時鐘芯片的選擇 .......................................................................... 6 按鍵模塊的選擇 .......................................................................... 6 第 3 章 硬件設(shè)計 .................................................................................................. 7 單片機(jī) 最小系統(tǒng) ..................................................................................... 7 最小系統(tǒng)接線圖 .......................................................................... 7 時鐘電路 ...................................................................................... 7 復(fù)位電路 ...................................................................................... 8 顯示模塊 ................................................................................................. 8 液晶顯示電路 .............................................................................. 8 顯示器 LCD1602 的介紹 ............................................................ 9 傳感器模塊 ........................................................................................... 11 霍爾傳感器工作原理 ................................................................ 11 霍爾傳感器的特性 .................................................................... 12 測速方法 .................................................................................... 13 西安工程大學(xué)畢業(yè)設(shè)計（論文） IV 時鐘模塊 ............................................................................................... 13 時鐘電路 .................................................................................... 13 時鐘芯片介紹 ............................................................................ 14 DS1302 的工作原理 ................................................................... 14 DS1302 的控制字節(jié) ................................................................... 14 數(shù)據(jù)輸入輸出 (I/O).................................................................... 15 按鍵模塊 ............................................................................................... 15 系統(tǒng)總設(shè)計圖 ....................................................................................... 15 第 4 章 系統(tǒng)軟件設(shè)計與實現(xiàn) ............................................................................ 17 C 語言介紹 ............................................................................................ 17 軟件實現(xiàn)的功能 ................................................................................... 18 主流程圖 ............................................................................................... 18 顯示子程序設(shè)計 ................................................................................... 19 速度、里程處理流 程設(shè)計 ................................................................... 20 處理流程圖 ................................................................................ 20 算法流程 .................................................................................... 21 按鍵處理流程設(shè)計 ............................................................................... 22 第 5 章 系統(tǒng)調(diào)試與仿真 .................................................................................... 23 軟件調(diào)試 ............................................................................................... 23 Keil 簡介 ..................................................................................... 23 程序調(diào)試 .................................................................................... 23 調(diào)試中的問題 ............................................................................. 23 硬件仿真 ............................................................................................... 24 Pr