delay.asm

基于UCM40的超声波测距函数,可测0.08---2.5米距离,数值精确

		   NAME DELAY
?PR?_DELAY?DELAY   SEGMENT   CODE
		   PUBLIC    _DELAY
		   RSEG      ?PR?_DELAY?DELAY
_DELAY:         PUSH    ACC
		MOV	A,R7
		JZ	DELA1
		INC	R6
DELA1:		MOV	R5,#50D
		DJNZ	R5,$
		DJNZ	R7,DELA1
		DJNZ	R6,DELA1
		POP	ACC
		RET

		END