單片機搶答器設計
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;=====正常搶答處理程序=====
TRUE1: ACALL BARK ;按鍵發(fā)聲
MOV A,R2
MOV R6,A ;搶答時間R2送R6
MOV R3,#01H
CLR OK ;因為答題的計時不再查詢搶答,所以就鎖了搶答
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
;=====犯規(guī)搶答程序=====
ERROR: MOV R0,#00H
MOV TH1,#3CH
MOV TL1,#0B0H
MOV 34H,R3 ;犯規(guī)號數(shù)暫存與(34H)
HERE: MOV A,R0
CJNE A,#0AH,FLASH ;0.5s向下運行->滅并停響
CLR RING
MOV R3,#0AH
MOV R4,#0AH
MOV R5,#0AH ;三燈全滅
AJMP CHECK1
FLASH: CJNE A,#14H,CHECK1 ;下面系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 ;取回號數(shù)
MOV R5,#0BH
MOV R4,#0BH ;顯示FF和號數(shù)
AJMP CHECK1
CHECK1:JNB P1.7,QUIT1
ACALL DISPLAY
AJMP HERE
QUIT1: CLR RING
CLR OK
AJMP START
;=====單片機搶答器顯示程序=====
DISPLAY:
MOV DPTR,#DAT1 ;查表顯示程序,利用P0口做段選碼口輸出/P2低三位做位選碼輸出,
MOV A,R5
MOVC A,@A+DPTR
MOV P2,#01H
MOV P0,A
ACALL DELAY
MOV DPTR,#DAT2
MOV A,R4
MOVC A,@A+DPTR
MOV P2,#02H
MOV P0,A
ACALL DELAY
MOV A,R3
MOVC A,@A+DPTR
MOV P2,#04H
MOV P0,A
ACALL DELAY
RET
DAT1:DB 00H,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H
;"滅","1","2","3","4","5","6","7","8","9","滅","F"
DAT2:DB 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H
;第一個為零,其他與上相同,因為十位如果為零顯示熄滅
;====加減時間延時(起到不會按下就加N個數(shù))======
DELAY1: MOV 35H,#08H
LOOP0: ACALL DISPLAY
DJNZ 35H,LOOP0
RET
;=====延時(顯示和去抖動用到)=====
DELAY: MOV 32H,#12H
LOOP: MOV 33H,#0AFH
LOOP1: DJNZ 33H,LOOP1
DJNZ 32H,LOOP
RET
;=====發(fā)聲程序=====
BARK: SETB RING
ACALL DELAY1
ACALL DELAY1
CLR RING ;按鍵發(fā)聲
RET
;=====TO溢出中斷(響鈴程序)=====
T0INT: MOV TH0,#0ECH
MOV TL0,#0FFH
JNB RING,OUT;
CPL P3.6 ;RING標志位為1時候P3.6口不短取反使喇叭發(fā)出一定頻率的聲音
OUT: RETI
;=====T1溢出中斷(計時程序)=====
T1INT: MOV TH1,#3CH
MOV TL1,#0B0H
INC R0
RETI
END
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