单片机控制的计数计时器(一)信息工程毕业(5)
2013-06-17 01:05
导读：OV 43H,A W2:JB P1.2,Q1 ACALL D10 JB P1.2,Q1 ACALL D10 L3:JNB P1.2,L3 CPL 00H Q1:JB 00H,L0 CLR TR0 MOV A,30H CJNE A,#00H,X1 MOV A,31H CJNE A,#00H,X1 MOV P1,#0FDH AJMP X2 X1:MOV P1,#0FFH CLR P2.7 X2:JB
OV 43H,A
W2:JB P1.2,Q1
ACALL D10
JB P1.2,Q1
ACALL D10
L3:JNB P1.2,L3
CPL 00H
Q1:JB 00H,L0
CLR TR0
MOV A,30H
CJNE A,#00H,X1
MOV A,31H
CJNE A,#00H,X1
MOV P1,#0FDH
AJMP X2
X1:MOV P1,#0FFH
CLR P2.7
X2:JB P3.6,X3
ACALL D10
JB P3.6,X3
ACALL D10
L2:JNB P3.6,L2
MOV A,30H
INC A
DA A
MOV 30H,A
JC X4
X3:JB P3.7,X5
ACALL D10
JB P3.7,X5
ACALL D10
L4:JNB P3.7,L4
X4:MOV A,30H
ADD A,#0AH
DA A
MOV 30H,A
JC X6
X5:JB P3.1,X7
ACALL D10
JB P3.1,X7
ACALL D10
L5:JNB P3.1,L5
X6:MOV A,31H
INC A
DA A
MOV 31H,A
JC X6
X7:JB P3.0,W3
ACALL D10
JB P3.0,W3
ACALL D10
L6:JNB P3.0,L6
MOV A,31H
CLR C
ADD A,#0AH
DA A
MOV 31H,A
AJMP W3
TAB:DB C0H,F9H,A4H,B0H,
DB 99H,92H,82H,F8H,
DB 80H,6FH,
D10:MOV R5,#11H
（转载自http://www.ＮＳＥＡＣ.com中国科教评价网）
LOOP1:MOV R4,#11H
LOOP2:NOP
NOP
DJNZ R4,LOOP2
NOP
NOP
DJNZ R5,LOOP1
RET
L0:SETB TR0
AJMP W3
D0:MOV TH0,#3CH
MOV TL0,#0B0H
DJNZ R7,D3
MOV R7,#14H
MOV A,30H
CJNE A,#00H,S0
MOV A,31H
CJNE A,#00H,S1
AJMP D3
S1:DEC A
MOV 31H,A
MOV A,31H
ANL A,#0FH
CJNE A,#0FH,D4
MOV A,31H
ANL A,#0F0H
ORL A,#09H
MOV 31H,A
D4:MOV 30H,#99H
AJMP D3
S0:DEC A
MOV 30H,A
MOV A,30H
ANL A,#0FH
CJNE A,#0FH,D3
MOV A,30H
ANL A,#0F0H
ORL A,#09H
MOV 30H,A
D3:MOV A,30H
CJNE A,#00H,X0
MOV A,31H
CJNE A,#00H,X0
MOV P1,#0FDH
MOV P2,#0F8H
CPL 00H
CPL TR0
X0:CLR C
RETI
D1:MOV TH1,#0ECH
&nb
