【正文】 亦需要做同樣的處理 。 P3口輸出字位碼，去控制要顯示的位，其原理圖如圖36所示。 需要說(shuō)明的是，這里設(shè)計(jì)的是簡(jiǎn)易的電子鐘，主要是用程序運(yùn)行來(lái)計(jì)算時(shí)間，這樣用程序來(lái)確定出 1s的時(shí)間精度是很有限的，所以整個(gè)時(shí)鐘的精度不太高。秒值加 1 MOV A,SECOND CJNE A,60,J0 。調(diào)用延時(shí) SETB 。其程序流程圖如圖 45所示： 10 送 R6 250 送 R7 返回 (R6)=(R7) ? Y N 20 圖 44 中斷程序流程圖 DISPLAY: MOV A,SECOND 。顯示分個(gè)位 CLR MOV P0,40H 。 則將時(shí)間調(diào)到了所要顯示的時(shí)間 143022，通過(guò)此方法可將時(shí)間調(diào)整到任何需要顯示的時(shí)間。 3. 在設(shè)計(jì)程序時(shí) ,不能妄想一次就將整個(gè)程序設(shè)計(jì)好 ,反復(fù)修改 ,不斷改進(jìn) 是程序設(shè)計(jì)的必經(jīng)之路 。 同時(shí)，還要感謝三年中孜孜不倦的為我們講課的老師們，是他們毫無(wú)保留地將他們的知識(shí)傳授給我們，才使 得今天的我能夠順利的完成我的畢業(yè)設(shè)計(jì)，感謝漯河職業(yè)技術(shù)學(xué)院，是這里給我提供了良好的學(xué)習(xí)環(huán)境和生活環(huán)境，讓我的大學(xué)生活豐富多彩，讓我對(duì)今后的生活更加充滿了信心。北京：北京航天航空大學(xué)出版社， 2020. ， MCS51單片機(jī)原理及接口技術(shù) {M}，北京：電子工業(yè)出版社， 2020. ，單片機(jī)原理及應(yīng)用 {M}，北京：機(jī)械工業(yè)出版社， 2020. .C程序設(shè)計(jì) [M].北京：清華大學(xué)出版社， 1999 .無(wú)刷直流電機(jī)的電梯門控制系統(tǒng)研究 [D].吉林：吉林大學(xué)， 2020 .無(wú)刷直流電機(jī) 控制系統(tǒng)設(shè)計(jì) [D].大連：大連理工大學(xué)， 2020 .具有 PID自整定功能的溫度控制器研究與實(shí)現(xiàn) [D].大連：大連理工大學(xué)， 2020 .基于 PWM技術(shù)的電動(dòng)機(jī)模擬器 [D].天津：天津大學(xué)， 2020 ，姜軍生，趙文亮，孫學(xué)巖 .基于單片機(jī)的直流電機(jī) PWM調(diào)速系統(tǒng) [J].農(nóng)業(yè)化研究，2020 28 附錄一 系統(tǒng)原理圖 A7 A7A6 A6A5 A5A4 A4A3 A3A2 A2A1 A1A0 A0S7B7B6B5B4B3B2B1B0S6S5S4S3S2S1S0B0B1B2B3B4B5B6B7S0S1S2S3S4S5S6S7X T A L 218X T A L 119A L E30EA31P S E N29RS T9P 0 .0 /A D 039P 0 .1 /A D 138P 0 .2 /A D 237P 0 .3 /A D 336P 0 .4 /A D 435P 0 .5 /A D 534P 0 .6 /A D 633P 0 .7 /A D 732P 1 . 01P 1 . 12P 1 . 23P 1 . 34P 1 . 45P 1 . 56P 1 . 67P 1 . 78P 3 .0 /R X D10P 3 .1 /T X D11P 3 .2 /I NT 012P 3 .3 /I NT 113P 3 .4 /T 014P 3 .7 / R D17P 3 . 6 / W R16P 3 .5 /T 115P 2 .7 /A 1 528P 2 .0 / A 821P 2 .1 / A 922P 2 .2 /A 1 023P 2 .3 /A 1 124P 2 .4 /A 1 225P 2 .5 /A 1 326P 2 .6 /A 1 427U1A T 8 9 C5 1S S E TM S E TH S E TA02B018A13B117A24B216A35B315A46B414A57B513A68B612A79B711CE19A B / B A1U27 4 L S 2 4 5 29 附錄二 元件清單 序號(hào) 名稱 型號(hào)規(guī)格 數(shù)量 1 單片機(jī) AT89C51 1片 2 譯碼驅(qū)動(dòng)器 74LS245 1片 3 LED數(shù)碼管 7SEGMPX8CCBLUE 1個(gè) 4 按鍵 BUTTON 3個(gè) 5 導(dǎo)線 若干 30 附錄三 程序清單 S_SET BIT 。去抖動(dòng) JB S_SET,A1 INC SECOND 。顯示秒 MOV B,10 DIV AB CLR MOVC A, A+DPTR 33 MOV P0, A LCALL DELAY SETB MOV A,B CLR MOVC A,A+DPTR MOV P0,A LCALL DELAY SETB CLR MOV P0,40H 。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。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。 Then in high school, think don39。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。 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。 From the corner at the beginning of deep friendship。 A person39。二十年的人生軌跡深深淺淺，突然就感覺(jué)到有些事情，非做不可了。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。顯示小時(shí) MOV B,10 DIV AB 34 CLR MOVC A,A+DPTR MOV P0,A LCALL DELAY SETB MOV A,B CLR MOVC A,A+DPTR MOV P0,A LCALL DELAY SETB RET TABLE: DB 3FH,06H,5BH,4FH,66H DB 6DH,7DH,07H,7FH,6FH DELAY: MOV R6,10 D1: MOV R7,250 DJNZ R7,$ DJNZ R6,D1 RET END 35 畢業(yè)設(shè)計(jì)（論文）成績(jī)?cè)u(píng)定表 系別： 填表日 期： 年 月 日 學(xué)生姓名 學(xué)號(hào) 班級(jí) 設(shè)計(jì)（論文）題目 單片機(jī)數(shù)字時(shí)鐘設(shè)計(jì) 指導(dǎo)教師意見(jiàn)： 指導(dǎo)教師 職稱 成績(jī) 36 g an employment tribunal clai Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。判斷是否加到 60分 MOV MINUTE,0 LJMP J1 S3: LCALL DELAY JB H_SET,A1 K2: INC HOUR 。初始化 MOV MINUTE,0 MOV SECOND,0 MOV TCNT,0 MOV TMOD,01H 。北京：機(jī)械工業(yè)出版社， 2020. 。 總之，通過(guò)這次課程設(shè)計(jì)不僅使我鞏固了本課程所學(xué)的基本知識(shí)，還使我具有了撰寫(xiě)設(shè)計(jì)報(bào)告的 初步訓(xùn)練能力，我相信這些能力在我以后的工作或者是再學(xué) 習(xí)中一定會(huì)起到不小的作用，看到自己幾周的小成果，感覺(jué)一切的辛苦和艱難都是值得的。這幾周的大部分時(shí)間都在研究程序怎么處理，在這個(gè)過(guò)程中加深了我對(duì)匯編語(yǔ)言命令的應(yīng)用，而且也更加了解到軟硬件配套的重要性。顯示時(shí)的個(gè)位 RET 23 第 5 章 調(diào)試與運(yùn)行 電