【正文】 .................................................................................IABSTRACT ..................................................................................................................................II目 錄 ...........................................................................................................................................III引 言 .............................................................................................................................................11 設計任務及方案分析 ...............................................................................................................2 設計任務及要求 ....................................................................................................................2 設計總體方案及方案論證 ...................................................................................................2 體溫測量的方案與分析 .......................................................................................................3 元件的選擇 ..................................................................................................................3 總體結構框圖 ..............................................................................................................4 測溫流程圖 ..................................................................................................................42 主要元器件功能的介紹 ...........................................................................................................5 單片機 ...................................................................................................................................5 AT89C52 芯片簡介 ......................................................................................................5 AT89C52 的引腳功能介紹 ..........................................................................................6 AT89C52 的特殊功能 ..................................................................................................8 AT89C52 的數(shù)據(jù)存儲 ..................................................................................................8 AT89C52 的中斷 ..........................................................................................................8 AT89C52 的兩種工作模式 ..........................................................................................9 溫度傳感器 .........................................................................................................................10 DS18B20 簡介 ............................................................................................................10 DS18B20 的引腳說明 ................................................................................................10 DS18B20 的測溫原理 ................................................................................................11 DS18B20 的外形和內(nèi)部結構 ....................................................................................11 DS18B20 的應用電路 ................................................................................................12 使用 DS18B20 的注意事項 ......................................................................................13 LCD1602 ..............................................................................................................................15 LCD1602 液晶的介紹 ................................................................................................15 LCD1602 液晶的引腳功能簡介 ................................................................................15 LCD1602 液晶的操作控制 ........................................................................................16 LCD1602 液晶的指令集 ............................................................................................17 3 系統(tǒng)硬件電路的設計 ............................................................................................................20 硬件總體設計思路 .............................................................................................................20 單片機時鐘電路與復位電路的設計 .................................................................................20 時鐘電路設計 ............................................................................................................20 復位電路設計 ............................................................................................................21 溫度傳感器模塊 .................................................................................................................21 液晶顯示模塊 .....................................................................................................................21湖北工業(yè)大學商貿(mào)學院畢業(yè)設計III 報警電路模塊 .....................................................................................................................244 系統(tǒng)軟件設計 .........................................................................................................................25 軟件 KEIL 和 PROTEUS 的簡單介紹 ...................................................................................25 軟件 Keil 簡介 ...........................................................................................................25 軟件 Proteus 簡介 ......................................................................................................25 系統(tǒng)程序的編寫 .................................................................................................................26 系統(tǒng)主程序 ................................................................................................................26 溫度傳感器初始化 ....................................................................................................27 溫度轉換命令子程序 ................................................................................................27 溫度數(shù)據(jù)的計算方法 ................................................................................................28 源代碼 .................................................................................................................................285 性能測試與分析 ....................................................