text3.asm

Proteus在MCS-51％26ARM7系统中的应用百例 Proteus在MCS-51％26ARM7系统中的应用百例

CH 		EQU 	30H
DPCNT 	EQU 	31H
DPBUF 	EQU 	33H
GDATA 	EQU 	32H
ST 		BIT 	P3.2
OE 		BIT 	P3.0
EOC 	BIT 	P3.1
		ORG 	00H
		LJMP 	START
		ORG 	0BH
		LJMP 	T0X
		ORG 	30H
START: 	MOV 	CH,#0BCH
		MOV 	DPCNT,#00H
		MOV 	R1,#DPCNT
		MOV 	R7,#5
		MOV 	A,#10
		MOV 	R0,#DPBUF
LOP: 	MOV 	@R0,A
		INC 	R0
		DJNZ 	R7,LOP
		MOV 	@R0,#00H
		INC 	R0 
		MOV 	@R0,#00H
		INC 	R0 
		MOV 	@R0,#00H
		MOV 	TMOD,#01H
		MOV 	TH0,#(65536-4000)/256
		MOV 	TL0,#(65536-4000) MOD 256
		SETB 	TR0
		SETB 	ET0
		SETB 	EA
WT: 	CLR 	ST
		SETB 	ST
		CLR 	ST
WAIT: 	JNB 	EOC,WAIT
		SETB 	OE 
		MOV 	GDATA,P1
		CLR 	OE		
		MOV 	A,GDATA
		MOV 	B,#100
		DIV 	AB
		MOV 	33H,A
		MOV 	A,B
		MOV 	B,#10
		DIV 	AB
		MOV 	34H,A
		MOV 	35H,B
		SJMP 	WT
T0X: 	NOP

		MOV 	TH0,#(65536-4000)/256
		MOV 	TL0,#(65536-4000) MOD 256
		MOV 	DPTR,#DPCD
		MOV 	A,DPCNT
		ADD 	A,#DPBUF
		MOV 	R0,A
		MOV 	A,@R0
		MOVC 	A,@A+DPTR
		MOV 	P0,A
		MOV 	DPTR,#DPBT
		MOV 	A,DPCNT
		MOVC 	A,@A+DPTR
		MOV 	P2,A
		INC 	DPCNT
		MOV 	A,DPCNT
		CJNE 	A,#8,NEXT
		MOV 	DPCNT,#00H
NEXT: 	RETI
DPCD: 	DB 		3FH,06H,5BH,4FH,66H
		DB 		6DH,7DH,07H,7FH,6FH,00H
DPBT: 	DB 		0FEH,0FDH,0FBH,0F7H
		DB 		0EFH,0DFH,0BFH,07FH
		END