【正文】 MOV A,R0 CJNE A,0AH,FULL 。如果是搶答倒計時 ,如是則查詢搶答 ,否者跳過查詢繼續(xù)倒數(shù) (這里起到鎖搶答作用 ) AJMP RECOUNT ACCOUT: MOV A,DATA0 JNB ,TRUE1 JNB ,TRUE2 JNB ,TRUE3 JNB ,TRUE4 JNB ,TRUE5 JNB ,TRUE6 JNB ,TZ3 JNB ,TZ4 AJMP RECOUNT TZ3: JMP TRUE7 TZ4: JMP TRUE8 QUIT: CLR OK 。 3）搶答倒計時剩余 5秒時出現(xiàn)下圖（圖 c）的結(jié)果 ： 圖 .c 若搶答倒計時剩余 5秒時，蜂鳴器發(fā)出聲響，直到為零時恢復(fù)初始狀 態(tài)。 七、參考文獻 （ 1）吳亦峰，陳德為，單片機原理與接口技術(shù)，電子工業(yè)出版社， 2020 （ 2）程相波，衛(wèi)安軍，基于 MCS－５１單片機的八路搶答器設(shè)計方法研究【 J】，北京工業(yè)職業(yè)技術(shù)學(xué)院學(xué)報 2020， 6（ 2） 16 附錄： 定時器 T1時間初值，設(shè) 50ms 時間初值為 X,X 的計算方法為 X=（ 2 ^1650*10^3),X=15536D=3CB0H OK EQU 25H 。50ms 為一次溢出中斷 SETB EA SETB ET0 SETB ET1 。搶答只顯示計時 ,滅號數(shù) 17 AJMP COUNT 。除十分出個位 /十位 MOV 30H,A 。計時完畢 MOV R0,00H DEC R6 。回答時間 R2送 R6 MOV R3,01H CLR OK 。顯示 00和號數(shù) AJMP CHECK1 CHECK1: JNB ,QUIT1 ACALL DISPLAY AJMP HERE QUIT1: CLR RING CLR OK AJMP START 。=====TO 溢出中斷 (響鈴程序 )===== T0INT: MOV TH0,0ECH MOV TL0,0FFH JNB RING,OUT。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。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯過，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。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，空氣里有著剛下過雨之后的清新因子。想要的，不想要 的，界限明確，好像沒有什么可以撼動自己。 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。s governing body, has also ordered an immediate investigation into the referee39。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 it. 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。=====發(fā)聲程序 ===== BARK: SETB RING ACALL DISPLAY ACALL DISPLAY CLR RING 。下面是 1s 的情況 ,響并顯示號數(shù)并清 R0,重新計 SETB RING MOV R0,00H MOV R3,34H 。如果按下了 停止鍵 執(zhí)行的程序 CLR RING AJMP START 。1s 中 向下運行 CLR RING AJMP CHECK FULL: CJNE A,14H,CHECK 。重置定時器 RECOUNT: MOV A,R6 。送 R1R6,因為 R1 中保存了搶答時間