hcs595.asm.bak

来自「用keil环境和proteus实现的16*16四字点阵显示」· BAK 代码 · 共 56 行

CLOCK BIT P2.7
DAS BIT P3.0
SH BIT P3.1
MR BIT P3.7

ORG 0
START:
	;CLR CLOCK
	MOV R7,#0AAH  ;存储要发送的数
	MOV A,R7
	MOV R0,#8
	ACALL SEND
  ;SETB CLOCK
LJMP START

SEND:
	RLC A           ;先送高位
	JC SEND1
	CLR SH
	CLR CLOCK
	NOP
	NOP
	NOP
	CLR DAS
	NOP
	NOP
	NOP
	NOP
	SETB SH
	NOP
	NOP
	SETB CLOCK
	DJNZ R0,SEND
	RET
SEND1:
	CLR SH
	CLR CLOCK
	NOP
	NOP
	SETB DAS
	NOP
	NOP
	NOP
	NOP
	SETB SH
	NOP
	NOP
	SETB CLOCK
  DJNZ R0,SEND
RET
  
DELAY:

RET

END