【正文】 independent keyboard. Through schematic design and Proteus simulation, the feasibility of this design has been proved. Keywords: STC89C52RC, SHT10, I2C bus, independent keyboard, temperature and humidity control基于 STC89C52RC 單片機的大棚溫濕度自動控制系統(tǒng) 目 錄 1 前言 ............................................................................................................................... 1 2 總體方案設計 ............................................................................................................... 3 溫濕度控制系統(tǒng)的設計指標要求 .................................................................... 3 系統(tǒng)設計的原則 ................................................................................................ 3 可靠性 ..................................................................................................... 3 性價比 ..................................................................................................... 3 方案比較 ............................................................................................................ 4 方案一 ..................................................................................................... 4 方案二 ..................................................................................................... 4 方案論證 ............................................................................................................ 5 方案選擇 ............................................................................................................ 5 3 單元模塊設計 ............................................................................................................... 6 各單元模塊功能介紹及電路設計 .................................................................... 6 單片機最小系統(tǒng) ..................................................................................... 6 液晶顯示模塊 ......................................................................................... 8 溫濕度傳感器模塊 ................................................................................. 8 報警電路的設計 ................................................................................... 9 輸出電路設計 ....................................................................................... 10 電源的設計 ........................................................................................... 12 按鍵電路設計 ..................................................................................... 13 串口通信電路 ....................................................................................... 14 元件清單 .......................................................................................................... 15 關鍵器件的介紹 .............................................................................................. 17 STC89C52RC ......................................................................................... 17 SHT10 溫濕度傳感器 ............................................................................ 19 4 系統(tǒng) 軟件設計 ............................................................................................................. 22 軟件設計的總體結構 ...................................................................................... 22 主要模塊的設計流程框圖 .............................................................................. 24 主程序流程圖 ....................................................................................... 24 SHT10 子程序流程圖 ............................................................................ 25 基于 STC89C52RC 單片機的大棚溫濕度自動控制系統(tǒng) LCD1602 子程序流程圖 ....................................................................... 27 輸出控制子程序流程圖 ....................................................................... 28 鍵盤掃描子程序流程圖 ....................................................................... 29 軟件設計所用工具 .......................................................................................... 31 Keil uVision4 .......................................................................................... 31 Proteus .................................................................................................... 31 5 系統(tǒng)調試 ..................................................................................................................... 32 用 Proteus 搭建仿真總圖 ................................................................................ 32 用 Keil 對程序進行調試、編譯 ..................................................................... 33 6 結論 ............................................................................................................................. 36 系統(tǒng)的功能 ...................................................................................................... 36 系統(tǒng)的指標參數 .............................................................................................. 36 系統(tǒng)功能分析 .................................................................................................. 36 7 總結與體會 ................................................................................................................. 38 8 致謝 ............................................................................................................................. 39 9 參考文獻 ..................................................................................................................... 40 附錄 1 系統(tǒng)的電路原理圖 ............................................................................................ 41 附錄 2 系統(tǒng)仿 真總圖 .................................................................................................... 42 附錄 3 系統(tǒng)實物照片 .................................................................................................... 43 附錄 4 系統(tǒng)源程序 .......................................