【正文】 適的溫度環(huán)境，許多電子設(shè)備就不能正常工作，糧倉的儲(chǔ)糧就會(huì)變質(zhì)霉?fàn)€，酒類的品質(zhì)就沒有保障。 [關(guān)鍵詞 ] 數(shù)字式溫度計(jì) DS18B20 AT89C2051 數(shù)碼管長 春 大 學(xué) 課程設(shè)計(jì)紙 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ II The design of the digital thermometer [Abstract] With people’ s living standard rises ceaselessly, undoubtedly SCM control is one of the goals of the people’ s to pursue, but people demand more and more of it for modern job, scientific research, life, providing more convenient facilities that needs microcontroller tech nology developing from several of all towards digital control system, intelligent control direction. The design of the digital temperature measuring system measuring ranges from minus 10 degrees Celsius to 85 degrees Celsius, the measurement accuracy is degrees Celsius, and useing of LED direct reading . This design uses AT89C2051 as singlechip microputer controller,as temperature sensor DS18B20, and a total of 4 cathode tube to realize LED digital temperature it can exactly reach the requirements. [KeyWords] Digital thermometer DS18B20 AT89C2051 Digital tube 長 春 大 學(xué) 課程設(shè)計(jì)紙 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ I 目錄 引言 .............................................................................................................................. 1 第 1章 總體方案設(shè)計(jì) ................................................................................................ 2 溫度測量系統(tǒng)設(shè)計(jì)方案 ........................................................................ 2 顯示部分設(shè)計(jì)方案 ................................................................................ 2 總體設(shè)計(jì)框圖 ........................................................................................ 2 第 2章 系統(tǒng)硬件電路設(shè)計(jì) ........................................................................................ 3 單片機(jī)模塊 .............................................................................................. 3 AT89C2051 功能及特性 ................................................................. 4 單片機(jī)模塊功能 ............................................................................ 4 溫度采集部分硬件 .................................................................................. 6 溫度傳感器 DS18B20 ..................................................................... 6 DS18B20 溫度傳感器與單片機(jī)的接口電路 ................................. 8 顯示部分電路設(shè)計(jì) ................................................................................ 10 設(shè)計(jì)實(shí)物圖 ............................................................................................ 11 第 3章 系統(tǒng)軟件部分設(shè)計(jì) ...................................................................................... 12 主程序 .................................................................................................... 12 讀出溫度 子程序 .................................................................................... 12 溫度轉(zhuǎn)換命令子程序 ............................................................................ 13 計(jì)算溫度子程序 .................................................................................... 14 顯示數(shù)據(jù)刷新子程序 ............................................................................ 14 程序代碼 ................................................................................................ 15 總結(jié) ............................................................................................................................ 19 致 謝 .......................................................................................................................... 20 參考文獻(xiàn) .................................................................................................................... 21 附錄 電路圖 .............................................................................................................. 22 長 春 大 學(xué) 課程設(shè)計(jì)紙 第 1 頁 共 22 頁 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊