DAC	EQU	8000H
UP	BIT	00H
	ORG	0
	LJMP	START
	ORG	30H
START:	MOV	SP,#60H
	SETB	UP
	CLR	A
L5:	SETB	P1.0
	JB	P1.0,L1		;如果P1.0＝1，則發出心電、脈搏波形；否則發出鋸齒或三角波形
	MOV	DPTR,#DAC
L6:	SETB	P1.1
	JB	P1.1,L3		;如果P1.1＝1，則發出三角波；否則發出鋸齒波
	MOVX	@DPTR,A
	INC	A
	SJMP	L5
L3:	JNB	UP,L4
	INC	A
	MOVX	@DPTR,A
	CJNE	A,#255,L6
	CPL	UP
	SJMP	L5
L4:	DEC	A
	MOVX	@DPTR,A
	CJNE	A,#0,L6
	CPL	UP
	SJMP	L5
L1:	CLR	A
	MOV	R3,A
	MOV	R2,#176
	MOV	DPTR,#DAC
LOOP:	PUSH	DPH
	PUSH	DPL
	MOV	A,R3
	INC	R3
	SETB	P1.1
	JB	P1.1,SPO2	;如果P1.1＝1，則發出脈搏波形；否則，發出心電波形。
	MOV	DPTR,#ECG_TAB
	SJMP	L2
SPO2:	MOV	DPTR,#SPO_TAB
L2:	MOVC	A,@A+DPTR
	POP	DPL
	POP	DPH
	MOVX	@DPTR,A
	DJNZ	R2,LOOP
        SJMP	L5
ECG_TAB:DB	7DH,7FH,80H,80H,80H,81H,82H,82H,85H,83H,84H,84H,84H,83H,84H,81H
	DB	80H,7FH,7DH,7CH,7CH,7CH,7BH,7DH,7BH,7AH,7AH,7CH,7CH,7DH,7DH,7DH
	DB	7DH,7EH,7DH,7DH,7EH,7DH,7CH,7CH,7DH,7CH,7EH,7DH,7CH,7BH,7CH,7CH
	DB	7DH,7DH,7DH,7CH,7DH,7EH,7CH,7EH,7DH,7DH,7EH,7FH,80H,83H,85H,86H
	DB	84H,82H,81H,7DH,7EH,7EH,7EH,7CH,7DH,80H,89H,9FH,0B2H,0A1H,6CH,69H
	DB	76H,7DH,80H,80H,7FH,82H,82H,84H,83H,85H,86H,88H,87H,88H,89H,89H
	DB	8AH,89H,89H,89H,86H,85H,87H,85H,84H,82H,83H,81H,82H,81H,80H,82H
	DB	82H,82H,83H,84H,84H,84H,83H,84H,82H,82H,82H,82H,82H,82H,82H,81H
	DB	80H,80H,80H,7FH,80H,80H,7FH,7FH,80H,7EH,7EH,7EH,7EH,7FH,80H,81H
	DB	81H,84H,84H,83H,80H,7EH,7BH,7BH,7AH,7BH,7BH,7CH,83H,90H,0ABH,0A3H
	DB 	7CH,60H,70H,76H,7AH,79H,7AH,7AH,7BH,7BH,7EH,7EH,7EH,7EH,80H,80H
SPO_TAB:DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,03H,03H,0AH,0AH,16H,24H,24H,32H
	DB	3CH,3CH,44H,47H,47H,47H,45H,45H,43H,43H,40H,3EH,3EH,3CH,39H,39H
	DB	36H,32H,32H,2EH,2EH,2BH,29H,29H,28H,29H,29H,29H,2AH,2AH,2AH,2AH
	DB	29H,27H,27H,25H,22H,22H,1FH,1CH,1CH,19H,19H,16H,14H,14H,11H,0FH
	DB	0FH,0DH,0BH,0BH,0AH,09H,09H,08H,08H,07H,05H,05H,04H,02H,02H,01H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H
	DB	00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H	
	END