text8.asm

汇编写的小程序初学很好的 是单片机ATM89C51用的开发工具是KEIL UV2

ORG 0
START:	MOV R2,#7
	MOV A,#0feH 
	SETB C 
LOOP:	MOV P1,A 
	acall delay
	RLC A 
	DJNZ R2,LOOP 
	MOV R2,#7
LOOP1:	MOV P1,A 
	acall delay			
	RRC A 
	DJNZ R2,LOOP1 
	LJMP START 
delay: mov r5,#100 
d1:    mov r6,#100
d2:    mov r7,#100
djnz r7,$
djnz r6,d2
djnz r5,d1
ret

	
	END