jk6-1.asm

微机原理课程 所有讲义PPT 课程全实验（包括代码程序设计实验报告） 习题及答案

SERIAL	EQU 2000H
CONTROL	EQU 2AH
SWH_PL	EQU 02H
SWH_TXD	EQU 01H
DIG_MR	EQU 08H
DIG_TXD	EQU 04H
LED_MR	EQU 20H
LED_TXD	EQU 10H
COM_TXD	EQU 40H

ORG	0000H
	LJMP	S0MAIN
	ORG	0500H
S0MAIN:	CLR	EA
	MOV	DPTR,#SERIAL
	MOV	A,#CONTROL
	ORL	A,#LED_TXD
	MOVX	@DPTR,A
	ACALL	DIMS
	XRL	A,#LED_MR
	MOVX	@DPTR,A
	ACALL	DIMS
	XRL	A,#LED_MR
	MOVX	@DPTR,A
	MOV	SBUF,#0FFH
	JNB	TI,$
	CLR	TI
	MOV	SBUF,#0FFH
	JNB	TI,$
	CLR	TI
	MOV	SCON,#00H
	MOV	A,#07FH
NEXT1:	MOV	SBUF,#0FFH
	JNB	TI,$
	CLR	TI
	MOV	SBUF,A
	JNB	TI,$
	CLR	TI
	ACALL	D200MS
	RR	A
	JB	ACC.7,NEXT1
NEXT2:	MOV	SBUF,A
	JNB	TI,$
	CLR	TI
	MOV	SBUF,#0FFH
	JNB	TI,$
	CLR	TI
	ACALL	D200MS
	RR	A
	JB	ACC.7,NEXT2
	SJMP	NEXT1
D200MS:	MOV	R7,#200
DIMS:	MOV	R6,#02H
DL:	MOV	R5,#0FFH
DL1:	DJNZ	R5,DL1
	DJNZ	R6,DL
	DJNZ	R7,DIMS
	RET
	end