【正文】 畢業(yè)論文誠(chéng)信承諾書(shū) 本人鄭重承諾： 我所呈交的畢業(yè)論文《多功能數(shù)字電子鐘的設(shè)計(jì)》是在指導(dǎo)教師的指導(dǎo)下，獨(dú)立開(kāi)展研究取得的成果，文中引用他人的觀點(diǎn)和材料，均在文后按順序列出其參考文獻(xiàn)，論文使用的數(shù)據(jù)真實(shí)可靠。 承諾人簽名： 日期： 年 月 日 北京理工大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì) 多功能數(shù)字電子鐘的設(shè)計(jì) 摘要 多功能數(shù)字電子鐘憑借自身優(yōu)勢(shì)在生活中得到了廣泛的運(yùn)用， 一個(gè)數(shù)字時(shí)鐘的控制核心是單片機(jī)。 通過(guò)單片機(jī)的時(shí)鐘信號(hào)達(dá)到實(shí)現(xiàn)計(jì)時(shí)的功能，時(shí)間數(shù)據(jù)可以經(jīng)由單片機(jī)輸出，利用顯示器顯示出結(jié)果。校時(shí)，定時(shí)，鬧鐘，倒計(jì)時(shí)等功能利用鍵盤(pán)實(shí)現(xiàn)。 本 畢業(yè)設(shè)計(jì) 通過(guò) 51 系列單片機(jī) AT89C2051 來(lái)設(shè)計(jì) 多功能數(shù)字 電子時(shí)鐘， 編程 用 C語(yǔ)言， 能夠 實(shí)現(xiàn)秒，分， 小時(shí) 和 日 ，月， 年 的 準(zhǔn)確 顯示、定時(shí) 鬧鐘 等功能。本次 畢業(yè) 設(shè)計(jì)的電子時(shí)鐘系統(tǒng)由時(shí)鐘電路， LED顯示電路，定時(shí)報(bào)警電路，按鍵調(diào)整電路組成。 數(shù)字時(shí)鐘芯片具有可編程的優(yōu)點(diǎn)，功能擴(kuò)展容易，如在電路板上留有一個(gè)溫度傳感器，電源輸出插座等，易于功能擴(kuò)展。 關(guān)鍵詞 ： 單片機(jī) ； AT89C2051； C 語(yǔ)言 北京理工大學(xué) 2021屆本科生畢業(yè)設(shè)計(jì) The design of the multifunction digital electronic clock ABSTRACT Multifunction digital electronic clock with their own advantages have been widely used in life, the control center is a singlechip digital clock. Achieve timing functions through the microcontroller clock signal is reached, the time data can be output via the MCU using the display shows the results. When the school, timing, alarm clock, countdown and other functions using the keyboard implementation. The graduation AT89C2051 through 51 series multifunction digital electronic clock design, Using C programming language, can be achieved in seconds, minutes, hours and days, months, years to accurately display, timing alarm clock and other functions. The graduate design electronic clock system by the clock circuit, LED display circuit, timer alarm circuit, key adjustment circuit. Programmable digital clock chip has the advantage of easy extensions, for leave a temperature sensor, a power outlet on the board and others,it is very easy for extensions. Keyword: MCU。 AT89C2051。C programming language 北京理工大學(xué) 2021屆本科生畢業(yè)設(shè)計(jì) 目錄 1緒論 ................................................................................................................................. 1 數(shù)字鐘發(fā)展史 ........................................................................................................ 1 研究背景 ............................................................................................................... 2 研究狀況 ............................................................................................................... 3 未來(lái)發(fā)展趨勢(shì) ........................................................................................................ 4 數(shù)字鐘設(shè)計(jì)研究?jī)?nèi)容 ............................................................................................. 4 ................................................................................................................ 5 2單片機(jī) .............................................................................................................................. 6 （ Single Chip Microsoftputer,簡(jiǎn)稱(chēng) MCU）簡(jiǎn)介 .................................... 6 .................................................................................................. 6 ..................................................................................................... 6 .................................................................................... 7 ..................................................................................................... 7 ............................................................................................ 8 ..................................................................................................... 9 ............................................................................................ 10 .............................................................................................................. 10 3各個(gè)模塊的特性及結(jié)構(gòu) ....................................................................................................11 AT89C2051單片機(jī)模塊 ..........................................................................................11 LED顯示模塊 ....................................................................................................... 15 ....................................................................................... 15 ................................................................................... 17 多功能數(shù)字電子鐘技術(shù)路線(xiàn) ................................................................................. 18 、流程圖 ................................................................ 18 ............................................................................................ 19 本章小結(jié) ............................................................................................................. 19 4硬件電路設(shè)計(jì) ................................................................................................................. 20 復(fù)位電路 ............................................................................................................. 20 按鍵電路 ............................................................................................................. 20 時(shí)鐘電路 ............................................................................................................. 21 顯示控制電路 ...................................................................................................... 22 數(shù)碼管顯示電路 .................................................................................................. 22 電源電路設(shè)計(jì) ...................................................................................................... 23 綜合電路的實(shí)現(xiàn) .................................................................................................. 23 本章小結(jié) ............................................................................................................. 24 5系統(tǒng)軟件的設(shè)計(jì) .............................................................................................................. 25 調(diào)時(shí)功能 .............