1限幅滤波 FILTTER1: MOV B,A CLR C SUBB A,SDAT JNC FTLTER1 CPL A INC A JUGFT1: SETB A SUBB A,#DELTY JNC JUGFT3 MOV A,SDAT RET JUGFT3: MOV A,B MOV SDAT,A RET 2限速滤波 FILTER2: MOV A,20H CLR C SUBB A,21H JNC LOOP0 CPL A INC A LOOP0: MOV 23H,A MOV A,21H CLR C SUBB A,22H JNC LOOP1 CPL A INC A LOOP1 MOV 24H，A ADD A,23H RRC A MOV LIMIT,A MOV A,23H CJNE A,LIMIT,DONE1 AJMP DONE3 DONEl: JC DONE3 MOV A,24H CJNE A,LIMIT, DONE2 AJMP DONE3 DONE2: JC DONE3 AJMP DONE4 DONE3: MOV A,22H AJMP DONE5 DONE4: MOV A,21H ADD A,22H RRC A AJMP DONE5 DONE5: MOV A,21H DONE6: RET LIMIT: EQU 30H