【正文】 .............................12 功能要求 ...............................................................................................................................................................13 方案論證與設(shè)計 ...................................................................................................................................................1 控制部分的方案選擇 ....................................................................................................................................1 測溫部分的方案選擇 ....................................................................................................................................1 顯示部分的方案選擇 ....................................................................................................................................24 系統(tǒng)硬件電路設(shè)計 ...............................................................................................................................................2 主控器 AT89C52 ..........................................................................................................................................2 時鐘電路 DS1302 .........................................................................................................................................3. DS1302 的性能特性 ..............................................................................................................................3 DS1302 數(shù)據(jù)操作原理 ...........................................................................................................................3 測溫電路的設(shè)計 ............................................................................................................................................5 溫度傳感器工作原理 ............................................................................................................................5 DS18B20 與單片機的接口電路 .............................................................................................................8 顯示電路的設(shè)計 ............................................................................................................................................9 鍵盤接口的設(shè)計 ........................................................................................................................................105 系統(tǒng)程序的設(shè)計 .................................................................................................................................................10 陽歷程序設(shè)計 ..............................................................................................................................................10 時間調(diào)整程序設(shè)計 ......................................................................................................................................11 溫度程序設(shè)計 ..............................................................................................................................................12 主程序 ..................................................................................................................................................12 讀出溫度子程序 ..................................................................................................................................12 溫度轉(zhuǎn)換命令子程序 ..........................................................................................................................12 計算溫度子程序 ..................................................................................................................................13 顯示數(shù)據(jù)刷新子程序 ...........................................................................................................................13６ 調(diào)試及性能分析 ...............................................................................................................................................13 調(diào)試步驟 ......................................................................................................................................................14 性能分析 ..........................................................................................