課程設(shè)計(jì)-基于單片機(jī)音樂(lè)倒數(shù)計(jì)時(shí)器的設(shè)計(jì)(完整版)
【正文】 :JB ,K1 。T0 1S次數(shù)賦初值 MOV 40H,00H。跳轉(zhuǎn)到外部中斷1ORG 0001BHLJMP TIME2 。12單片機(jī)晶振電路與復(fù)位電路圖12為晶振電路與復(fù)位電路，又稱單片機(jī)最小電路13顯示電路圖13為顯示電路，顯示電路由單片機(jī)和一個(gè)共陽(yáng)4段數(shù)碼管組成，P1為輸入口，P2口為片選口。應(yīng)用89C51（52）單片機(jī)設(shè)計(jì)并制作一個(gè)單片機(jī)最小系統(tǒng)，達(dá)到如下基本要求：（1）具有上電復(fù)位和手動(dòng)復(fù)位功能。 （3）程序存儲(chǔ)器（內(nèi)部ROM） 89C51/89S51內(nèi)部有4KB Flash 存儲(chǔ)器 (89C52/89S52有8KB)，程序存儲(chǔ)器用于存放用戶 程序和原始數(shù)據(jù)等。 b. 按操作鍵K3—減少倒計(jì)數(shù)的時(shí)間1分鐘。一旦按下鍵則開(kāi)始倒計(jì)數(shù)，當(dāng)計(jì)數(shù)為0時(shí)，發(fā)出一陣音樂(lè)聲。程序執(zhí)行后工作指示燈LED閃動(dòng)，表示程序開(kāi)始執(zhí)行，按下操作鍵K1～K4動(dòng)作如下。 c. 按操作鍵K4—設(shè)置完成。 （4）定時(shí)/計(jì)數(shù)器 89C51/89S51有2個(gè)16位的可編程定時(shí)/計(jì)數(shù)器 T0和T1(89C52/89S52有3個(gè)，除T0、T1以外，還 有一個(gè)定時(shí)/計(jì)數(shù)器T2)，實(shí)現(xiàn)定時(shí)或計(jì)數(shù)功能。（2）使用單片機(jī)片內(nèi)程序存儲(chǔ)器。4．輸入電路14輸入電路圖圖14為輸入電路，上電K2，K3,K4為時(shí)間設(shè)置，K1為確定，確定后K2，K3為微調(diào)，K4為確認(rèn)，設(shè)置階段LED燈亮，開(kāi)始后滅，倒計(jì)時(shí)結(jié)束后又蜂鳴器輸出音樂(lè)。跳轉(zhuǎn)到計(jì)數(shù)器中斷1START:MOV IE,0FH 。*******************初始時(shí)間的調(diào)試*******************K1:CLR 。按下K4按鈕 給予20分鐘定時(shí)JNB ,$MOV R1,20LJMP K1。比較分鐘是否已經(jīng)為0，若為0則下一步，如不為則繼續(xù)運(yùn)行CLR TR0SETB KAISI:MOV A,40H 。外部中斷1，分鐘微調(diào)減1分鐘CJNE R1,1,Q2 。秒鐘重新賦值DEC R1 。數(shù)碼管顯示斷碼表TABLE1:DW 64260,64400,64580,64684,64777,64898,64968 ?？偨Y(jié)如下：● 查閱資料和閱讀相關(guān)文獻(xiàn)的重要性。t agree with the disciplinary action your employer has taken against youdamagesbased agreement. In England and Wales, your solicitor can39。s antiracism taskforce, is in London for the Football Association39。s governing body, has also ordered an immediate investigation into the referee39。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。想要的，不想要的，界限明確，好像沒(méi)有什么可以撼動(dòng)自己。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過(guò)雨之后的清新因子。Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。嫌惡過(guò)自己的怯懦，最終卻發(fā)現(xiàn)有很多緣分，有很多錯(cuò)過(guò)，好像冥冥之中真的已經(jīng)注定。 Then in high school, think don39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BB
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