基于单片机的声光汽车防盗报警系统
5.2 程序设计
ORG 0000H
LJMP MAIN
ORG 001BH
MOV TH1,R1
MOV TL1,R0
CPl P1.1
RETI
ORG 0100H
MAIN: JB P3.2,MAIN
START:CLR P1.0
MOV TMOD,#10H
MOV IE,#88H
MOV DPTR,#TAB
LOOP: JNB P3.3,WJ
CLR A
MOVC A,@A+DPTR
MOV R1,A
INC DPTR
CLR A
MOVC A,@A+DPTR
MOV R0,A
ORL A,R1
JZ NEXT0
MOV A,R0
ANL A,R1
CJNE A,#0FFH,NEXT
SJMP START
NEXT: MOV TH1,R1
MOV TL11,R0
SETB TR1
SJMP NEXT1
NEXT0:CLR TR1
NEXT1:CLR A
INC DPTR
MOVC A,@A+DPTR
MOV R2,A
LOOP1:LCALL D200
DJNZ R2,LOOP1
INC DPTR
AJMP LOOP
WJ: MOV A,#0FFH
SETB P1.0
CLR TR1
LJMP MAIN
D200: MOV R4,#41H
D200B:MOV A,#0FFH
D200A:DEC A
JNZ D200A
DEC R4
CJNE R4,#00H,d200B
RET
TAB: DB 0FEH,06H,01H, 0FEH,06H,01H,
DB 0FCH,0CH,02H, 0FCH,0CH,02H,0FFH,0FFH
END
