port1 (2).asm

Proteus在MCS-51％26ARM7系统中的应用百例 Proteus在MCS-51％26ARM7系统中的应用百例

KEYLEFT   	BIT   P1.0                    
KEYRIGHT  	BIT   P1.1
LEDLEFT   	BIT   P1.2
LEDRIGHT  	BIT   P1.3	   	;位定义
       	ORG    00H
       	SETB   KEYLEFT		                
       	SETB   KEYRIGHT		;欲读数,先写1
LOOP:  	MOV    C,KEYLEFT
       	MOV    LEDLEFT,C
       	MOV    C,KEYRIGHT
       	MOV    LEDRIGHT,C
       	LJMP   LOOP
       	END