15.2.1汉明码校验.txt

里面有好多的原码,大家都来下载.用asm编写的

HMST:
MOV	DPTR,#PLK1
MOV	R2,DPL
MOV	R3,DPH
MOV 	DPTR,#PLK0					
MOV	R7,#(N+2)					
MOVX	A,@DPTR
MOV 	R6,A
INC 		DPTR
MOV 	R4,DPL
MOV 	R5,DPH
MOV 	DPL,R2
MOV	DPH,R3
LCALL 	HM						
MOV 	A,B
MOVX	@ DPTR,A
INC 		DPTR
MOV 	A,R6
SWAP 	A
LCALL 	HM						
MOV 	A,B
MOVX	@ DPTR,A
INC 		DPTR
MOV 	R2,DPL
MOV 	R3,DPH
MOV	DPL,R4
MOV	DPH,R5
DJNZ	R7,00D1
RET
HM:								
ANL		A,#0FH
CLR		C						
RRC		A						
RL		A						
RL		A
RLC		A
RL		A
RL		A
MOV	B,A
ANL		A,#54H
JNB		P,HM1					
SET		0F0H
HM1:
MOV	A,B						
ANL		A,#64H
JNB		P,HM2
SETB	0F1H						
HM2:
MOV	A,B
ANL		A,#70H
JNB		P,HM3					
SETB	0F3H
HM3:
RET