用at98c51制作八路搶答器-在線瀏覽
2025-07-03 06:47本頁(yè)面
【正文】 CHMOV TL1,0B0H。允許四個(gè)中斷,T0/T1/INT0/INT1CLR OKCLR RINGSETB TR1SETB TR0。***查詢程序***START:MOV R5,0BHMOV R4,0BHMOV R3,0BHACALL DISPLAY。去抖動(dòng),如果開(kāi)始鍵按下就向下執(zhí)行,否者跳到非法搶答查詢ACALL BARK。送R1R6,因?yàn)镽1中保存了搶答時(shí)間SETB OK。搶答只顯示計(jì)時(shí),滅號(hào)數(shù)AJMP COUNT。***非法搶答處理程序***FALSE0: ACALL BARK。按鍵發(fā)聲MOV R3,01HAJMP ERRORFALSE2: ACALL BARKMOV R3,02HAJMP ERRORFALSE3: ACALL BARKMOV R3,03HAJMP ERRORFALSE4: ACALL BARKMOV R3,04HAJMP ERRORFALSE5: ACALL BARKMOV R3,05HAJMP ERRORFALSE6: ACALL BARKMOV R3,06HAJMP ERROR。先在兩個(gè)時(shí)間LED上顯示R1JNB ,INC0。,如按下跳到DECOJNB ,BACK0。如果不是99,R2加1,如果加到99了,R1就置0,重新 加起.MOV R1,00HACALL DELAY1AJMP INT0SUBADD0: INC R1ACALL DELAY1AJMP INT0SUBDEC0: MOV A,R1JZ SETR1。***INT1(回答時(shí)間R2調(diào)整程序)*** INT1SUB:MOV A,R2MOV B,0AHDIV ABMOV R5,AMOV R4,BMOV R3,0AHACALL DISPLAYJNB ,INC1JNB ,DEC1JNB ,BACK1AJMP INT1SUBINC1: MOV A,R2CJNE A,63H,ADD1MOV R2,00HACALL DELAY1AJMP INT1SUBADD1: INC R2ACALL DELAY1AJMP INT1SUBDEC1: MOV A,R2JZ SETR2DEC R2ACALL DELAY1AJMP INT1SUBSETR2: MOV R2,63HACALL DELAY1AJMP INT1SUBBACK1: RETI 。重置定時(shí)器中斷次數(shù)MOV TH1,3CHMOV TL1,0B0H。R6保存了倒計(jì)時(shí)的時(shí)間,之前先將搶答時(shí)間或回答時(shí)間給R6MOV B,0AHDIV AB。十位存于(30H)MOV 31H,B。取十位MOV R4,31H。大于5s跳到LARGER,小于等于5s會(huì)提醒MOV A,R0CJNE A,0AH,FULL。下面系1s的情況,響并顯示號(hào)數(shù)并清R0,重新計(jì)SETB RINGMOV A,R6JZ QUIT。一秒標(biāo)志減1AJMP CHECKLARGER: MOV A,R0CJNE A,14H,CHECK。計(jì)時(shí)一秒R6自動(dòng)減1MOV R0,00HCHECK: JNB ,QUIT。如果是搶答倒計(jì)時(shí),如是則查詢搶答,否者跳過(guò)查詢繼續(xù)倒數(shù)(這里起到鎖搶答作用)AJMP RECOUNTACCOUT: JNB ,TRUE0JNB ,TRUE1JNB ,TRUE2JNB ,TRUE3JNB ,TRUE4JNB ,TRUE5JNB ,TRUE6JNB ,TRUE7AJMP RECOUNTQUIT: CLR OK。***正常搶答處理程序***TRUE0: ACALL BARK。搶答時(shí)間R2送R6MOV R6,AMOV R3,00HCLR OK。按鍵發(fā)聲MOV A,R2MOV R6,A。因?yàn)榇痤}的計(jì)時(shí)不再查詢搶答,所以就鎖了搶答AJMP COUNTTRUE2: ACALL BARK。MOV A,R2MOV R6,AMOV R3,03HCLR OKAJMP COUNTTRUE4: ACALL BARK。MOV A,R2MOV R6,AMOV R3,05HCLR OKAJMP COUNTTRUE6:ACALL BARK。MOV A,R2MOV R6,AMOV R3,07HCLR OKAJMP COUNT。犯規(guī)號(hào)數(shù)暫存與(3
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