www.pudn.com > IOkou.rar > Text1.asm

main: mov p1,#0ffh  
      lcall delay 
      mov p1,#0000h 
      lcall delay 
      ljmp main 
delay: 
	mov r3,#250		;×îÍâ²ãÑ­»·7þÊ®´Î 
d1: 
	mov r4,#250		;´ÎÍâ²ãÑ­»·°ËÊ®´Î 
d2: 
	mov r5,#250		;×îÄÚ²ãÑ­»·250´Î 
	djnz r5,$		;×ܹ²ÑÓʱ2us*250*80*20=0.8S 
	djnz r4,d2 
	djnz r3,d1 
	ret 
	end