【正文】 活中的兩大要素。 52 系列單片 機(jī)技術(shù)成熟，功能強(qiáng)大，應(yīng)用廣泛。s Daily are very familiar with electronic products, at the same time, temperature and time are two elements in people39。Temperature sensor DS18B20 目錄 0 前言 ................................................................................................................... 1 1 概述 ................................................................................................................... 2 硬件概述 ......................................................................................................... 2 單片機(jī)的由來與發(fā)展 .................................................................................. 2 LCD 發(fā)展?fàn)顩r .............................................................................................. 3 DS1302 時鐘芯片簡介 ................................................................................. 3 DS18B20 溫度傳感器簡介 ........................................................................... 4 選題 ................................................................................................................ 4 選題的背景和意義 ...................................................................................... 4 系統(tǒng)概述 ......................................................................................................... 5 系統(tǒng)的工作過程 .......................................................................................... 5 2 需求分析 ........................................................................................................... 6 用戶需求 ......................................................................................................... 6 市場需求 ......................................................................................................... 6 3 總體設(shè)計 ............................................................................................................ 7 總體結(jié)構(gòu)概述 ................................................................................................. 7 硬件結(jié)構(gòu) ...................................................................................................... 7 軟件結(jié)構(gòu) ...................................................................................................... 7 總體結(jié)構(gòu)框圖 ................................................................................................. 7 硬件結(jié)構(gòu)框圖 .............................................................................................. 7 軟件結(jié)構(gòu)框圖 .............................................................................................. 8 II 4 硬件詳細(xì)設(shè)計 .................................................................................................... 9 單片機(jī)最小系統(tǒng) ............................................................................................. 9 STC89C52 單片機(jī)的特性 ......................................................................... 9 STC89C52 單片機(jī)的引腳及功能 ............................................................ 10 時鐘電路 .................................................................................................... 13 復(fù)位電路 .................................................................................................... 13 時鐘 /日歷電路 .............................................................................................. 14 DS1302 簡要說明 ....................................................................................... 14 DS1302 引腳說明 ....................................................................................... 14 DS1302 控制字和讀寫時序說明 ................................................................ 15 DS1302 片內(nèi)寄存器說明 ........................................................................... 17 時鐘電路與單片機(jī)的連接 ........................................................................ 18 環(huán)境溫度采集電路的設(shè)計 ........................................................................... 19 溫度傳感器選擇 ........................................................................................ 19 DS18B20 的特性與功能 ............................................................................. 20 DS18B20 控制字和讀寫時序說明 ............................................................. 21 溫度采集電路與單片機(jī)的連接 ................................................................. 24 顯示電路 ....................................................................................................... 25 LCD1602 特點(diǎn)與簡介 ................................................................................ 25 顯示電路與單片機(jī)的連接 ........................................................................ 29 按鍵電路 ....................................................................................................... 30 5 軟件詳細(xì)設(shè)計 ................................................................................................... 32 系統(tǒng)軟件的詳細(xì)概述 ................................................................................... 32 主程序 .......................................................................................................... 32 初始化模塊 .................................................................................................... 32 鍵盤模塊 ....................................................................................................... 33 時鐘 /日歷模塊 .............................................................................................. 34 計算器模塊 .................................................................................................... 35 溫度采集模塊 ............................................................................................... 36 6 系統(tǒng)調(diào)試 .......................................................................................................... 38 單片機(jī)基礎(chǔ)電路調(diào)試 ................................................................................... 38 顯示電路的調(diào)試 ........................................................................................... 39 DS1302 電路的調(diào)試 ...................................................................