15.3.7һ

第十五章 C51单片机软件抗干扰和数字滤波

FILTER8:
MOV	B,A
CLR 	 	A
MOV 	DPTR,#ABTAB
MOVC	A,@A+DPTR
MUL		AB
MOV	R4,A						
MOV	R3,B
MOV	A,#01H
MOVC	A,@A+DPTR
MOV	B,DELTY
MUL		AB						
ADD		A,R4
MOV	R4,A
MOV	A,B
ADDC	A,R3
MOV	R3,A
MOV	A,R4
JNB		ACC.7,FT1
INC   	R3
FT1:
MOV 	 A,R3					
MOV	DELTY,A
RET								
BQTAB:
DB     	80H,80H