【正文】 edure, temperature signal processing procedure, blackwhite control procedure, excess temperature warning procedure. Keywords ： AT89S51 Monolithic Integrated Circuit ； DS18B20 Temperature Chip； Temperature Control； 目 錄 第一張 緒論 ..........................................................................................................................5 背景 .................................................................................................................................5 國內外研究狀況和相關領域研究成果 .........................................................................5 糧倉溫濕度檢測發(fā)展狀況 .......................................................................................5 單片機歷史 ...............................................................................................................6 研究內容和研究方法 .......................................................................................................7 第二章 系統的總體設計 ...................................................................................................8 系統的組成 .....................................................................................................................8 系統工作流程 .................................................................................................................8 系統的功能介紹 .............................................................................................................9 第三章 系統的硬件設計 .......................................................................................................9 AT89C51 單片機功能介紹 ...............................................................................................9 芯片簡介 ...................................................................................................................9 AT89C51各引腳在設計中的定義 ...........................................................................9 .................................................................................................. 11 ..................................................................................................................12 模數轉換器 ...................................................................................................................12 模數轉換器的選擇 .................................................................................................12 AD轉換器 ICL7109的特點 .................................................................................13 I CL7109芯片引腳說明及外部連接 ....................................................................13 ICL7109與 89C51單片機的硬件接口設計 .........................................................16 溫度采集系統 ...............................................................................................................18 集成溫度傳感器的選擇 .........................................................................................18 AD590的性能特點 .................................................................................................18 溫度采集電路 .........................................................................................................19 濕度檢測 .......................................................................................................................20 濕度傳感器的選擇 .................................................................................................20 HS1101的性能特點 ...............................................................................................20 濕度測量電路 .........................................................................................................21 鍵盤及顯示接口擴展 .................................................................................................23 芯片的選擇 .............................................................................................................23 YM19264的引腳功能介紹 ...................................................................................23 YM19264與 AT89C51的連接 ..............................................................................24 第四章 系統軟件設計 .....................................................................................................25 程序開發(fā)環(huán)境及設計原則 .........................................................................................25 本設計程序功能及流程 .............................................................................................25 結 論 ...................................................................................................錯誤 !未定義書