基于单片机的八位抢答器(9)

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

31

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

32

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

33

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

34

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

35