zhengyanhua3
幼苗
共回答了18个问题采纳率:94.4% 举报
ORG 0000H
LJMP MAIN
ORG 000BH
LJMP T0ISR
ORG 0030H
MAIN:
MOV TMOD,#01H
MOV TH0,#HIGH(65536-50000)
MOV TL0,#LOW(65536-50000)
SETB TR0
SETB ET0
SETB EA
MOV R2,#0
SJMP $
T0ISR:
CLR TR0
MOV TH0,#HIGH(65536-50000)
MOV TL0,#LOW(65536-50000)
SETB TR0
MOV A,R0
CJNE A,#18,T001
MOV R0,#0
T001:
MOV DPTR,#LEDTAB
MOVC A,@A+DPTR
MOV P1,A
INC R0
RETI
LEDTAB:
DB 0FEH,0FCH,0F8H,0F0H,0E0H,0C0H,80H,00H
DB 80H,0C0H,0E0H,0F0H,0F8H,0FCH,0FEH,0FFH
DB 00H,0FFH
END
1年前
追问
9
sanlangqhz
举报
非常感谢!如果不用查表的话,把灯亮灭编在定时器中,该怎么编呢?急急急!!!!!!!!!!!!!!!!!!
举报
zhengyanhua3
ORG 0000H LJMP MAIN ORG 000BH LJMP T0ISR ORG 0030H MAIN: MOV TMOD,#01H MOV TH0,#HIGH(65536-50000) MOV TL0,#LOW(65536-50000) SETB TR0 SETB ET0 SETB EA MOV R2,#0 MOV R3,#0FEH SJMP $ T0ISR: CLR TR0 MOV TH0,#HIGH(65536-50000) MOV TL0,#LOW(65536-50000) SETB TR0 MOV A,R0 CJNE A,#8,T01 T01: JNC T02 MOV A,R3 CLR C RLC A MOV R3,A MOV P1,A RETI T02: CJNE A,#16,T03 T03: JNC T04 SETB C MOV A,R3 RRC A MOV R3,A MOV P1,A RETI T04: CJNE A,#17,T05 MOV P1,#0FFH MOV R3,#0FEH RETI T05: MOV P1,#00H RETI END