单片机汇编语言源程序如下:

OK EQU 20H;抢答开始标志位

RING EQU 22H;响铃标志位

ORG 0000H

AJMP MAIN

ORG 0003H

AJMP INT0SUB

ORG 000BH

AJMP T0INT

ORG 0013H

AJMP INT1SUB

ORG 001BH

AJMP T1INT

ORG 0040H

MAIN: MOV R1,#30;初设抢答时间为30s

MOV R2,#60;初设答题时间为60s

MOV TMOD,#11H;设置未定时器/模式1

MOV TH0,#0F0H

MOV TL0,#0FFH;越高发声频率越高,越尖

MOV TH1,#3CH

MOV TL1,#0B0H;50ms为一次溢出中断

SETB EA

SETB ET0

SETB ET1

SETB EX0

SETB EX1;允许四个中断,T0/T1/INT0/INT1

CLR OK

CLR RING

SETB TR1

SETB TR0;一开始就运行定时器,以开始显示FFF.如果想重新计数,重置TH1/TL1就可以了

;=====查询程序=====

START: MOV R5,#0BH

MOV R4,#0BH

MOV R3,#0BH

ACALL DISPLAY;未开始抢答时候显示FFF

JB P3.0,NEXT;ddddddd

ACALL DELAY

JB P3.0,NEXT;去抖动,如果"开始键"按下就向下执行,否者跳到非法抢答查询

ACALL BARK;按键发声

MOV A,R1

MOV R6,A;送R1->R6,因为R1中保存了抢答时间

SETB OK;抢答标志位,用于COUNT只程序中判断是否查询抢答

MOV R7,#01H ;读抢答键数据信号标志，这里表示只读一次有用信号

MOV R3,#0AH;抢答只显示计时,灭号数

AJMP COUNT;进入倒计时程序,"查询有效抢答的程序"在COUNT里面

NEXT: JNB P1.0,FALSE1

JNB P1.1,FALSE2

JNB P1.2,FALSE3

JNB P1.3,FALSE4

JNB P1.4,FALSE5

JNB P1.5,FALSE6

JNB P1.6,FALSE7

JNB P1.7,FALSE8

AJMP START

;=====非法抢答处理程序=====

FALSE1: MOV R3,#01H

AJMP ERROR

FALSE2: MOV R3,#02H

AJMP ERROR

FALSE3: MOV R3,#03H

AJMP ERROR

FALSE4: MOV R3,#04H

AJMP ERROR

FALSE5: MOV R3,#05H

AJMP ERROR

FALSE6: MOV R3,#06H

AJMP ERROR

FALSE7: MOV R3,#07H

AJMP ERROR

FALSE8: MOV R3,#08H

AJMP ERROR

;=====INT0(抢答时间R1调整程序)=====

INT0SUB:MOV A,R1

MOV B,#0AH

DIV AB

MOV R5,A

MOV R4,B

MOV R3,#0AH

ACALL DISPLAY;先在两个时间LED上显示R1

JNB P3.4,INC0;P3.4为+1s键,如按下跳到INCO

JNB P3.5,DEC0;P3.5为-1s键,如按下跳到DECO

JNB P3.1,BACK0;P3.1为确定键,如按下跳到BACKO

AJMP INT0SUB

INC0: MOV A,R1

CJNE A,#63H,ADD0;如果不是99,R2加1,如果加到99,R1就置0，重新加起。

MOV R1,#00H

ACALL DELAY1

AJMP INT0SUB

ADD0: INC R1

ACALL DELAY1

AJMP INT0SUB

DEC0: MOV A,R1

JZ SETR1;如果R1为0, R1就置99，

DEC R1

ACALL DELAY1

AJMP INT0SUB

SETR1: MOV R1,#63H

ACALL DELAY1

AJMP INT0SUB

BACK0: RETI

;=====INT1(回答时间R2调整程序)=====

INT1SUB:MOV A,R2

MOV B,#0AH

DIV AB

MOV R5,A

MOV R4,B

MOV R3,#0AH

ACALL DISPLAY

JNB P3.4,INC1

JNB P3.5,DEC1

JNB P3.1,BACK1

AJMP INT1SUB

INC1: MOV A,R2

CJNE A,#63H,ADD1

MOV R2,#00H

ACALL DELAY1

AJMP INT1SUB

ADD1: INC R2

ACALL DELAY1

AJMP INT1SUB

DEC1: MOV A,R2

JZ SETR2

DEC R2

ACALL DELAY1

AJMP INT1SUB

SETR2: MOV R2,#63H

ACALL DELAY1

AJMP INT1SUB

BACK1: RETI

;=====倒计时程序(抢答倒计时和回答倒计时都跳到改程序)=====

REPEAT:MOV A,R2 ;使用锦囊时重新计时

MOV R6,A

CLR RING

COUNT: MOV R0,#00H;重置定时器中断次数

MOV TH1,#3CH

MOV TL1,#0B0H;重置定时器

RECOUNT:MOV A,R6;R6保存了倒计时的时间,之前先将抢答时间或回答时间给R6

MOV B,#0AH

DIV AB;除十分出个位/十位

MOV 30H,A;十位存于(30H)

MOV 31H,B;个位存于(31H)

MOV R5,30H;取十位

MOV R4,31H;取个位

MOV A,R6

SUBB A,#07H

JNC LARGER;大于5s跳到LARGER,小于等于5s会提醒

MOV A,R0

CJNE A,#0AH,FULL;1s中0.5s向下运行

CLR RING

AJMP CHECK

FULL: CJNE A,#14H,CHECK;下面是1s的情况,响并显示号数并清R0,重新计

SETB RING

MOV A,R6

JZ QUIT;计时完毕

MOV R0,#00H

DEC R6;一秒标志减1

AJMP CHECK

LARGER: MOV A,R0

CJNE A,#14H,CHECK;如果1s向下运行,否者跳到查"停/显示"

DEC R6;计时一秒R6自动减1

MOV R0,#00H

CHECK: JNB P3.1,QUIT;如按下停止键退出

JNB OK,CHECKK ;只在回答倒计时才有效

AJMP NEXTT

CHECKK:JNB P3.0,REPEAT ;判断是否使用锦囊

NEXTT: ACALL DISPLAY

JB OK,ACCOUT;如果是抢答倒计时,如是则查询抢答,否者跳过查询继续倒数(这里起到锁抢答作用)

AJMP RECOUNT

ACCOUT:

MOV A,36H

JNB ACC.0,TRUE1

JNB ACC.1,TRUE2

JNB ACC.2,TRUE3

JNB ACC.3,TRUE4

JNB ACC.4,TRUE5

JNB ACC.5,TRUE6

JNB ACC.6,TZ1

JNB ACC.7,TZ2

AJMP RECOUNT

TZ1:JMP TRUE7

TZ2:JMP TRUE8

QUIT: CLR OK;如果按下了"停止键"执行的程序

CLR RING

AJMP START

;=====正常抢答处理程序=====

TRUE1: ACALL BARK

MOV A,R2

MOV R6,A;抢答时间R2送R6

MOV R3,#01H

CLR OK;因为答题的计时不再查询抢答,所以就锁了抢答

AJMP COUNT

TRUE2:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#02H

CLR OK

AJMP COUNT

TRUE3:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#03H

CLR OK

AJMP COUNT

TRUE4:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#04H

CLR OK

AJMP COUNT

TRUE5:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#05H

CLR OK

AJMP COUNT

TRUE6: ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#06H

CLR OK

AJMP COUNT

TRUE7:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#07H

CLR OK

AJMP COUNT

TRUE8:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#08H

CLR OK

AJMP COUNT

;=====犯规抢答程序=====

ERROR: MOV R0,#00H

MOV TH1,#3CH

MOV TL1,#0B0H

MOV 34H,R3;犯规号数暂存与(34H)

HERE: MOV A,R0

CJNE A,#06H,FLASH;0.3s向下运行->灭并停响

CLR RING

MOV R3,#0AH

MOV R4,#0AH

MOV R5,#0AH;三灯全灭

AJMP CHECK1

FLASH: CJNE A,#0CH,CHECK1;下面是0.8s的情况,响并显示号数并清R0,重新计

SETB RING

MOV R0,#00H

MOV R3,34H;取回号数

MOV R5,#0BH

MOV R4,#0BH;显示FF和号数

AJMP CHECK1

CHECK1: JNB P3.1,QUIT1

ACALL DISPLAY

AJMP HERE

QUIT1: CLR RING

CLR OK

AJMP START

;=====显示程序=====

DISPLAY:MOV DPTR,#DAT1;查表显示程序,利用P0口做段选码口输出/P2低三位做位选码输出,

MOV A,R3

MOVC A,@A+DPTR

MOV P2,#0feH

MOV P0,A

ACALL DELAY2

MOV DPTR,#DAT2

MOV A,R5

MOVC A,@A+DPTR

MOV P2,#0fdH

MOV P0,A

ACALL DELAY2

MOV A,R4

MOVC A,@A+DPTR

MOV P2,#0fbH

MOV P0,A

ACALL DELAY2

RET

DAT1:DB 00h,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H

;"灭","1","2","3","4","5","6","7","8","9","灭","F"

DAT2:DB 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H

;第一个为零,其他与上相同,因为十位如果为零显示熄灭

;====加减时间延时(起到不会按下就加N个数)======

DELAY1: MOV 35H,#08H

LOOP0: ACALL DISPLAY

DJNZ 35H,LOOP0

RET

;=====延时4236个机器周期(去抖动用到)=====

DELAY: MOV 32H,#12H

LOOP: MOV 33H,#0AFH

LOOP1: DJNZ 33H,LOOP1

DJNZ 32H,LOOP

RET

;=====延时4236个机器周期(显示用到)=====

DELAY2: MOV 32H,#43H

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