【正文】 ............................................................ 2 研究方案 ............................................................................................................................. 3 國(guó)內(nèi)外報(bào)警行業(yè)的發(fā)展 ..................................................................................................... 3 2 主要元件簡(jiǎn)介 ............................................. 4 AT89S52 單片機(jī) .................................................................................................................. 4 AT89S52 單片機(jī)簡(jiǎn)介 ..................................................................................................... 4 AT89S52 主要功能 ......................................................................................................... 5 單片機(jī)芯片引腳描述及應(yīng)用 ........................................................................... 5 MQX 系列可燃?xì)怏w傳感器 ............................................................................................... 8 傳感器的定義與組成 ..................................................................................................... 8 系列可燃?xì)怏w傳感器工作原理 ............................................................................. 8 系列可燃?xì)怏w 傳感器操作注意事項(xiàng) ..................................................................... 9 基本測(cè)試回路 ................................................................................................................. 9 芯片 ....................................................................................................................... 10 簡(jiǎn)介 ................................................................................................................... 10 引腳及各引腳功能 ........................................................................................... 10 工作原理 ........................................................................................................... 11 MAX232 芯片 ..................................................................................................................... 12 芯片簡(jiǎn)介 ........................................................................................................... 12 芯片主要特點(diǎn) ................................................................................................... 13 芯片標(biāo)準(zhǔn)應(yīng)用電路 ........................................................................................... 13 液晶顯示 LCD1602 ........................................................................................................... 13 桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文）報(bào)告用紙 LCD1602 液晶顯示屏簡(jiǎn)介 ........................................................................................... 13 LCD1602 液晶顯示屏的基本參數(shù)及引腳功能 ........................................................... 14 LCD1602 工作時(shí)序 ....................................................................................................... 15 3 硬件設(shè)計(jì)思路 .............................................. 16 系統(tǒng)基本原理 .................................................................................................................. 16 系統(tǒng)硬件設(shè)計(jì) .................................................................................................................. 16 單片機(jī)最小系統(tǒng) ........................................................................................................... 16 報(bào)警電路的設(shè)計(jì) ........................................................................................................... 19 可燃?xì)怏w傳感 器模塊設(shè)計(jì)與制作 ............................................................................... 19 按鍵模塊設(shè)計(jì) ............................................................................................................... 19 液晶顯示模塊設(shè)計(jì) ....................................................................................................... 20 模數(shù)轉(zhuǎn)換模塊設(shè)計(jì) ....................................................................................................... 20 串口下載模塊設(shè)計(jì) ....................................................................................................... 21 4 系統(tǒng)軟件設(shè)計(jì) ............................................. 22 編程軟件 KEIL 的介紹 ..................................................................................................... 22 系統(tǒng)主程序設(shè)計(jì) .............................................................................................................. 23 系統(tǒng)主程序流程圖 ....................................................................................................... 23 系統(tǒng)主程序設(shè)計(jì)要點(diǎn) ................................................................................................... 24 模數(shù)轉(zhuǎn)換子程序 .............................................................................................................. 24 上位機(jī)界面程序 .............................................................................................................. 24 按鍵程序設(shè)計(jì) .................................................................................................................. 29 5 系統(tǒng)調(diào)試 ................................................. 32 硬件調(diào)試 .......................................................................................................................... 32 排除邏輯故障 ............................................................................................................... 32 排除元器件失效 ........................................................................................................... 32 軟件調(diào)試 .......................................................................................................................... 33 問題及解決方法 .............................................................................................................. 33 測(cè)試情況 .......................................................................................................................... 34 可燃?xì)怏w傳感器數(shù)據(jù)采集測(cè)試 ................................................................................... 34 串口模塊測(cè)試 .......................................................................................