电子抢答器程序.asm

汇编语言写的电子强答程序,对学生学习单片机很有帮助

ORG 0000H
LJMP MAIN
ORG 0003H
LJMP LED0
ORG 000BH
LJMP LED1
ORG 0013H
LJMP LED2
ORG 001BH
LJMP LED3
ORG 0050H
MAIN:MOV P1,#0
MOV A,#00000101B
MOV TCON,A
MOV A,#01100110B
MOV TMOD,A
MOV TL0,#0FFH
MOV TH0,#0FFH
MOV TL1,#0FFH
MOV TH1,#0FFH
MOV IE,#10001111B
MOV IP,#00001111B
SETB TR0
SETB TR1
SJMP $
ORG 0100H
LED0:MOV P1,#00000001B
LCALL DELY
CLR P1.0
CLR IE1
CLR TCON.5
CLR TCON.7
RETI
ORG 0150H
LED1:
MOV P1,#00000100B
LCALL DELY
CLR P1.2
CLR IE0
CLR IE1
CLR TCON.7
RETI
ORG 0200H
LED2:MOV P1,#00000010B
LCALL DELY
CLR P1.1
CLR IE0
CLR TCON.5
CLR TCON.7
RETI
ORG 0250H
LED3:MOV P1,#00001000B
LCALL DELY
CLR P1.3
CLR IE0
CLR IE1
CLR TCON.5
RETI
DELY:MOV R0,#75
DEL0:MOV R1,#100
DEL1:MOV R2,#100
DEL2:DJNZ R2,DEL2
DJNZ R1,DEL1
DJNZ R0,DEL0
RET
END