110
10-6 AT89C51
10
2.
1)
10
10-7
10
2)
10
3) T0
60 s1 min60 min1 hT01 s50 ms201 sBCD6010-8
10
10-8 T0
10
4) T1
5)
1 s1 s
10
6)
10
CLR A
MOV TMOD#11H T0T116
10
MOV TH0#3CH
MOV TL1#0B0H
MOV TH1#3CH
SETB EA
SETB ET0 T0
SETB TR0 T0
10
CLR 01H 1
LCALL YS05S 0.5 s
JC XYZ4 60XYZ4
MOV @R0A
SETB TR0 T0()
LCALL XSZCX
SETB 01H
JNB P2.7XYZOUT
0.5 s
MOV R0#55H
0.5 s
LCALL ADD1 1
MOV AR3
JC XYZ6 24XYZ6
MOV @RA
MOV 20H#00H
MOV R5#0FEH
MOV P2A
MOV A@R1
MOV DPTR#ABC
MOV P1A P1
LCALL YS1MS 1 ms
MOV P1#0FFH P1
LCALL ADD1 1 s
MOV AR3 A
JC INT0U 60 s
MOV @R0A
JC INT0U 60 min
MOV @R0A
JC INT0U 24 h
CPL 02H
YS1 MOV R7#19H
YS2 DJNZ R7YS2
LCALL YS05S
YS05S1 LCALL XSZCX
DJNZ R3YS05S1
RET
ABC DB 0C0H0F9H0A4H0B0H99H92H82H0F8H80H90H0FFH
END
P1.7
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P2.7£½0 £¿
24hµ½ £¿
60minµ½ £¿