【正文】 t launch the system, and brief introduction of 51 intact assembler codes and various functions of MCS89C51, especially until several important respect such as cut off , timer and their make more exhaustive introduction with connection of keyboard as infrared remotecontrol mand system it. Include the principle picture that the infrared ray was launched and the infrared ray received in this text, provide many kinds of schemes. Procedure of sending still to infrared remotecontrol mand, infrared ray receive procedure , cut off procedure , send cycle procedure , send data procedure and send 0 and 1 ,etc. procedure go on , make regularly. In addition has drawn various flow diagrams of procedure , thus finish this main point designed in an allround way, consult the plot course of the procedure blockdiagram, can write the application software , it is a characteristic of a thesis. Utilize MCS89C51 send and yards of checkup function instead many times , prevent other remote control yard and unknown interference of code from, thus improved the dependability of the products. Because again because the infrared remotecontrol mand device is small, low power dissipation , function are strong with the low grade characteristic of the cost, it is a kind of important remote control apparatus in modern daily life, so regarded as one of the important reasons for designing the subject this time 5 too. Keyword: MSC89C51 , infrared remotecontrol mand , keyboard interface 6 目 錄 摘要 ............................................................................................................................................. 3 Summary ...................................................................................................................................... 4 緒論 ............................................................................................................................................. 8 第一章紅外線遙控簡介 ................................................................................................................ 11 念 ................................................................................................................. 11 .......................................................................................................... 11 ............................................................................................................. 11 ......................................................................................................12 ： ....................................................................................................................13 第二章紅外遙控電路圖 ................................................................................................................16 收發(fā)電路圖 ..................................................................................................................16 接收電路的電源部分 .......................................................................................................17 ......................................................................................................17 OFF 功能 ...............................................................................................................17 定時功能 ..............................................................................................................18 ON/風(fēng)類功能 .........................................................................................................18 搖頭功能 ..............................................................................................................18 風(fēng)速控制 部分 .......................................................................................................19 第三章 MCS—51 的簡介 ..............................................................................................................20 Mcs8051 單片機(jī)的中斷系統(tǒng) ..........................................................................................23 有關(guān)中斷的概念 .....................................................................................................23 中斷系統(tǒng)的結(jié)構(gòu)： ................................................................................................24 中斷允許寄存器 IE ................................................................................................25 MCS－ 8051 的中斷響應(yīng)過程： ............................................................................27 MCS8051 的鍵盤接口與編程 ............................................................................................28 按鍵開關(guān)的抖動問題 : ..........................................................................................28 鍵盤與單片機(jī)的連接程序： ........................................................................................29 MCS8951 的定時 /計數(shù)器的方式控制字程序 ...................................................................37 計數(shù)器與定時器 .....................................................................................................37 定時 /計數(shù)器的四種工作方式 .........................................................................................40 工作方式 ...............................................................................................................40 /計數(shù)器的定時 /計數(shù)范圍 .....................................................................................42 第四章 遙控的鍵盤控制 ..............................................................................................................44 遙控的鍵盤控制電路圖 .................................................................................................45 實(shí)現(xiàn)程序 ......................................................................................................................46 結(jié)論與展望 ..................................................................................................................