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畢業(yè)設(shè)計(jì)-基于at89s51單片機(jī)的電子時(shí)鐘設(shè)計(jì)-閱讀頁(yè)

2025-06-25 01:38本頁(yè)面
  

【正文】 ;定時(shí)器 T0 中斷子程序 TIM0 START: MOV SP; 70H;設(shè)置堆棧指針 MOV 28H,00;設(shè)置顯示位數(shù)掃描指針初值為 0 MOV 2AH,12H;設(shè)置時(shí)鐘顯示寄存器初值為 12H MOV 2BH,00;設(shè)置分鐘顯示寄存器初值為 00H MOV 2CH,00;設(shè)置秒鐘顯示寄存器初值為 00H MOV TMOD,01H;設(shè)置定時(shí)器 T0 工作在方式 1 MOV TH0,0F0H;定時(shí) 4ms 的初值,即 0F060H MOV TL0,60H;初值的低位 MOV IE,82H;定時(shí)器 T0 中斷允許 MOV R4,250;保證后面實(shí)現(xiàn)中斷 250 次,即 1s 的延時(shí) SETB TR0;啟動(dòng)定時(shí)器 T0 LOOP: JB ,N2;若秒沒(méi)有按鍵,就轉(zhuǎn)去下一步檢查分 CALL DELAY;延時(shí) 5ms 消除抖動(dòng) MOV A,2CH;將秒寄存器的值載入累加器 A ADD A,01H; A 的內(nèi)容加 1 DA A;十進(jìn)制調(diào)整 MOV 2CH,A; A 的值存入秒寄存器 CJNE A,60H,N1;看是否已經(jīng)是 60 秒,若不是就繼續(xù)檢查 MOV 2CH,00;已經(jīng)是 60 秒,就清空秒寄存器的值 N1: JNB ,$;秒按鍵還沒(méi)有放開(kāi)就循環(huán)等待 CALL DELAY;延時(shí) 5ms,消除抖動(dòng) N2: JB ,N4;若分沒(méi)有按鍵,就轉(zhuǎn)去下一步檢查時(shí)鐘 CALL DELAY;延時(shí) 5ms,消除抖動(dòng) 電子時(shí)鐘的設(shè)計(jì) MOV A,2BH;將分寄存器的值載入累加器 A ADD A,01H; A 的內(nèi)容加 1 DA A;十進(jìn)制調(diào)整 MOV 2BH,A; A 的值存入分寄存器 CJNE A,60H,N3;看是否已經(jīng)是 60 分 MOV 2BH,00;已經(jīng)是 60 分,就清 空秒寄存器的值 N3: JNB ,$;分按鍵還沒(méi)有放開(kāi)就循環(huán)等待 CALL DELAY;延時(shí) 5ms,消除抖動(dòng) N4: JB ,LOOP;若時(shí)沒(méi)有按鍵,就轉(zhuǎn)回去繼續(xù)檢查看是否秒有按鍵 CALL DELAY;延時(shí) 5ms,消除抖動(dòng) MOV A,2AH;將時(shí)寄存器的值載入累加器 A ADD A,01H; A 的內(nèi)容加 1 DA A;十進(jìn)制調(diào)整 MOV 2AH,A; A 的值存入時(shí)寄存器 CJNE A,24H,N5;看是否已經(jīng)是 24 時(shí),若不是就繼續(xù)檢查 MOV 2AH,00;已經(jīng)是 24 時(shí),就 清空寄存器的值 N5: JNB ,$;時(shí)鐘按鍵還沒(méi)有放開(kāi)就循環(huán)等待 CALL DELAY;延時(shí) 5ms,消除抖動(dòng) JMP LOOP;返回重新檢查看是否有按鍵 。顯示位數(shù)掃描值加 1 CJNE R0,6,X3。掃描位數(shù)為 6,就另其值為 0 X3:MOV A,R0。A 加上 20H(顯示寄存器地址) =各時(shí)間顯示區(qū)地址 MOV R1,A。掃描位數(shù)存入 A SWAP A。將掃描值與顯示數(shù)據(jù)組合 MOV P1,A。******計(jì)時(shí)子程序 ****** CLOCK: MOV A,2CH;秒寄存器值載入 A ADD A,1;加 1 秒 DA A;十進(jìn)制調(diào)整 MOV 2CH,A; A 的值存入秒寄存器 CJNE A,60H,X4; A 不等 于 60 秒,就跳出程序去顯示 MOV 2CH,00;已經(jīng)是 60 秒,就清 0 MOV A,2BH;分寄存器值載入 A ADD A,1;加 1 分 DA A;十進(jìn)制調(diào)整 電子時(shí)鐘的設(shè)計(jì) MOV 2BH,A; A 的值存入分寄存器 CJNE A,60H,X4; A 不等于 60 分,就跳出程序去顯示 MOV 2BH,00;已經(jīng)是 60 分就清 0 MOV A,2AH;時(shí)寄存器值載入 A ADD A,1;加 1 小時(shí) DA A;十進(jìn)制調(diào)整 MOV 2AH,A; A 的值存入是寄存器 CJNE A,24H,X4; A 不等于 24 時(shí),就跳出程序去顯示 MOV 24H,00;已經(jīng)是 24 時(shí),就清 0 X4: RET 。******延時(shí) 5ms 消除抖動(dòng) ****** DELAY: MOV R6,60 D1: MOV R7,248 DJNZ R7,$ DJNZ R6,D1 RET END 電子時(shí)鐘的設(shè)計(jì) 7 系統(tǒng)仿真與實(shí)驗(yàn)測(cè)試 系統(tǒng)仿真 運(yùn)用 proteus 軟件進(jìn)行仿真現(xiàn)在 proteus 軟件中建立一個(gè)新的文件,再根據(jù)自己的要求選擇所需的器件,把器件進(jìn)行適當(dāng)?shù)呐盼缓筮M(jìn)行連接,連接后運(yùn)行軟件進(jìn)行仿真。藍(lán)色方框內(nèi)為可編輯區(qū),元件要放到它里面。 2.預(yù)覽窗口( The Overview Window):它可顯示兩個(gè)內(nèi)容,一個(gè)是:當(dāng)你在元件列表中選擇一個(gè)元件時(shí),它會(huì)顯示該元件的預(yù)覽圖;另一個(gè)是,當(dāng)你的鼠標(biāo)焦點(diǎn)落在原理圖編輯窗口時(shí)(即放置元件到原理圖編輯窗口后或在原理圖編輯窗口中點(diǎn)擊鼠標(biāo)后),它會(huì)顯示整張?jiān)韴D的縮略圖,并會(huì)顯示一個(gè)綠色的方框,綠色的方框里面的內(nèi)容就是當(dāng)前原理圖窗口中顯示的內(nèi)容,因此,你可用鼠標(biāo)在它上 面點(diǎn)擊來(lái)改變綠色的方框的位置,從而改變?cè)韴D的可視范圍。舉例,當(dāng)你選擇 “ 元件( ponents) ” ,單擊 “ P” 按鈕會(huì)打開(kāi)挑選元件對(duì)話框,選擇了一個(gè)元件后(單擊了 “ OK” 后),該元件會(huì)在元件列表中顯示,以后要用到該元件時(shí),只需在元件列表中選擇即可。 翻轉(zhuǎn): 完成水平翻轉(zhuǎn)和垂直翻轉(zhuǎn)。 6.仿真工具欄 仿真控制按鈕 1* 運(yùn)行 2* 單步運(yùn)行 3* 暫停 4* 停止 按照自己設(shè)計(jì)的電路圖就可以畫出想要的電路圖! ? 答:軟件中模擬受到電腦 CPU 工作頻率的影響,所以效果不是很明顯,但是一些基本的現(xiàn)象還是可以看出來(lái)的。在實(shí)際面包板中一定會(huì)看到正確的現(xiàn)象。連接芯片是要弄清楚各 個(gè)引腳對(duì)應(yīng)的端口號(hào),該接地的地方一定要接地,該接高電平的地方一定要接高電平。下述為 18: 30: 30 的仿真圖: 圖 8 12:00:00 時(shí)刻的仿真效果圖 電子時(shí)鐘的設(shè)計(jì) 結(jié)束語(yǔ) 單片機(jī)作為我們主要的專業(yè)課程之一,我覺(jué)得單片機(jī)課程設(shè)計(jì)很有必要,而且很有意義。 在這次課程設(shè)計(jì)中,運(yùn)用到了很多以前的專業(yè)知識(shí),雖然過(guò)去從未獨(dú)立應(yīng)用過(guò)它們,但在學(xué)習(xí)的過(guò)程中帶著問(wèn)題去學(xué)我發(fā)現(xiàn)效率很高,這是我做這次課程設(shè)計(jì)的一大收獲。發(fā)現(xiàn)、提出、分析、解決問(wèn)題和實(shí)踐能力的提高都會(huì)受益于我在以后的學(xué)習(xí)、工作和生活中。在設(shè)計(jì)的過(guò)程中發(fā)現(xiàn)了自己 的不足之處,對(duì)以前所學(xué)過(guò)的知識(shí)理解得不夠深刻,掌握得不夠牢固,不能靈活運(yùn)用。另外,要非常感謝我的指導(dǎo)老師,是她指引我克服一個(gè)由一個(gè)的困難,讓我學(xué)會(huì)對(duì)困難無(wú)所畏懼,以及對(duì)問(wèn)題的一些很重要的思考方法。 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。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。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 150th anniversary celebrations and will attend City39。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。s governing body, has also ordered an immediate investigation into the referee39。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?;蛟S是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個(gè)不同的日子過(guò)成了同一天的樣子;或許是追溯過(guò)去,對(duì)自己那些近乎偏執(zhí)的怪異信念的醒悟,這些天以來(lái),思緒一直很凌亂,在腦海中不斷糾纏。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。 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。 Then in high school, think don3
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