【正文】
圖 56 仿真測(cè)試圖 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) 26 具體 仿真測(cè)試實(shí)現(xiàn)的 結(jié)果 如圖 57 中的( a)、( b)、( c)、( d)、( e)、( f)、( g)、( h)、( i)、( j)圖所示。通過(guò)硬件和軟件相結(jié)合的方式 完成了 搶答器的設(shè)計(jì) ,從而實(shí)現(xiàn)了 選手按下相應(yīng)的按鍵,蜂鳴器發(fā)出提示音,直到按鍵釋放,數(shù)碼管顯示最先按下按鍵選手的編號(hào),選手回答完畢,主持人按下準(zhǔn)備按鈕,數(shù)碼管清零,蜂鳴器停止發(fā)聲,可以進(jìn)入下一題的搶答的功能。 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) 32 xx 大學(xué)本科畢業(yè)設(shè)計(jì)(論文) 33 參考文獻(xiàn) [1] 雷伏容等 .51 單片機(jī)常用模塊設(shè)計(jì)查詢手冊(cè) [Z].北京 :清華 大學(xué)出版社 ,2022:2740. [2] 潘永雄等 .電子線路 CAD 實(shí)用教程 [M].西安 :西安電子科技大學(xué)出版社 ,2022:1930. [3] 吳金戍 ,沈慶陽(yáng) ,郭庭吉 .8051 單片機(jī)實(shí)踐與應(yīng)用 [M].北京 :清華大學(xué)出版社 ,2022:915. [4] 林凌 ,李剛等 .新型單片機(jī)接口與技術(shù) [M].西安 :西安電子科技大學(xué)出版社 ,2022:4356. [5] 朱清慧等 .Proteus 教程 (第 2 版 )[M].北京 :清華大學(xué)出版社 ,2022:89104. [6] 王會(huì)良等 .單片機(jī) C 語(yǔ)言應(yīng)用 100 例 [M].北京 :電子工業(yè)出版社 ,2022:3349. [7] 宋戈等 .51 單片機(jī)應(yīng)用開(kāi)發(fā)范例大全 [M].北京 :人民郵電 出版社 ,2022:5267. [8] 王質(zhì)樸等 .MCS51 單片機(jī)原理接口及應(yīng)用 [M].北京 :北京理工大學(xué) 出版社 ,2022:1028. [9] 馬義德 .微型計(jì)算機(jī)原理及應(yīng)用 [M].北京 :高等教育出版社 ,2022:86105. [10] 江力 .單片機(jī)原理及其接口技術(shù) [M].北京 :清華大學(xué)出版社 ,2022:6679. [11] 樓然苗 ,李光飛 .單片機(jī)課程設(shè)計(jì)指導(dǎo) [M].北京 :北京航空航天大學(xué)出版社 ,2022:2436. [12] 楊居義 .單片機(jī)課程設(shè)計(jì)指導(dǎo) [M].北京 :清華大學(xué)出版社 ,2022:140164. [13] 馬忠梅 .單片機(jī)的 C 語(yǔ)言程序設(shè)計(jì) [M].北京 :北京航空航天大學(xué)出版社 ,2022:5679. [14] 沈鴻星 .LED 交通燈控制系統(tǒng)的硬件設(shè)計(jì) [J].電子工程師 ,2022,35(03):1531. [15] 李朝青 .單片機(jī)原理及接口技術(shù) [M].北京 :北京航空航天大學(xué)出版社 ,2022:3952. 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) 34 xx 大學(xué)本科畢業(yè)設(shè)計(jì)(論文) 35 致 謝 值此本科畢業(yè)論文完成之際,首先要感謝 論文指導(dǎo) 老師 對(duì)我的 悉心指導(dǎo) 。從選題,到任務(wù)書(shū),到開(kāi)題報(bào)告,再到中期檢查,最后到論文稿子的修改完成,指導(dǎo)老師負(fù)責(zé)的很到位,循循善誘,讓我在做畢業(yè)設(shè)計(jì)的過(guò)程中,不僅克服了許多硬件及軟件設(shè)計(jì)上的困難,而且讓我鍛煉了人格,在求學(xué)過(guò)程中,更加抱有一種沉穩(wěn)、好學(xué)地態(tài)度,對(duì)我以后的學(xué)習(xí)和生活幫助很多。 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) 36 xx 大學(xué)本科畢業(yè)設(shè)計(jì)(論文) 37 附錄 A 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) 38 xx 大學(xué)本科畢業(yè)設(shè)計(jì)(論文) 39 附錄 B 軟件程序部分: *************************************************** ********** 基于 AT89S52 單片機(jī)的搶答器設(shè)計(jì) ******* *************************************************** ORG 0000H JMP BEGIN TABLE: 。 01234 DB 6DH,7DH,07H,7FH 。延時(shí) 20*20ms 子程序 LOOP4: MOV R6,50 LOOP5: MOV R7,100 DJNZ R7,$ DJNZ R6,LOOP5 DJNZ R5,LOOP4 RET BEGIN: MOV P2,0FFH 。R4 位標(biāo)志值送 A 寄存 AGAIN: MOV DPTR,TABLE MOVC A,A+DPTR MOV P1,A LOOP1: MOV A,P3 。有搶答信號(hào)則逐次移動(dòng)判斷是哪一位搶答 INC R4 JNC LOOP2 MOV A,R4 MOVC A,A+DPTR 。若主持人按了復(fù)位信號(hào)鍵,則轉(zhuǎn)向程序復(fù)位 。信號(hào)驅(qū)動(dòng)蜂鳴器 LCALL DELAY 。 口反復(fù)間隔 變化,驅(qū)動(dòng)蜂鳴器 ENDag an employment tribunal clai Emloyment 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 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 Cay man Islandsbased Webb, the Watch m 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 don39。t remember his appearance. 童年時(shí),覺(jué)得壓歲錢(qián)和新衣服是過(guò)年必備,但是隨著年齡的推進(jìn),會(huì)越來(lái)越發(fā)現(xiàn),那些東西根本就可有可無(wú);初中時(shí),以為要有一場(chǎng)暗戀才意味著真正的成長(zhǎng),但三年過(guò)去后,自己心平氣和的寫(xiě)同學(xué)錄的時(shí)候,突然就發(fā)現(xiàn)是不是真正的成長(zhǎng)了,好像并沒(méi)有那么重要了;然后到了高中,覺(jué)得非要吐露出自己的心聲 才能為高中生涯里的懵懂情愫劃上一個(gè)句點(diǎn),但畢業(yè)晚會(huì)的時(shí)候最終還是被梗塞在了咽喉,后來(lái)再次站在他曾經(jīng)揮汗如雨的球場(chǎng),看著他投過(guò)籃球的球框時(shí),突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。 A person3