lowp2.asm

51LPC系列系列单片机掉电唤醒程序 程序代码

;----- DESIGN FOR LOW_POWR CONSUM TEST WHEN POWR DOWN -----------
TIME_H	  DATA	 30H
TIME_L	  DATA	 31H
INT1_CNT  DATA	 32H


	  ORG	00H
	  AJMP	RESET

	  ORG	0BH
          AJMP  T0_INT

          ORG   13H
	  AJMP	INT1_INT

          ORG   80H
T0_INT:
	  PUSH	ACC
          PUSH  PSW
          INC   TIME_L
          MOV   A,TIME_L
          JNZ   EXIT_INT0
          INC   TIME_H
EXIT_INT0:
          POP   PSW
	  POP	ACC
	  RETI

;-----------------------------------------------------------
	  ORG	200H
INT1_INT:
          SETB  P1.1
          INC   INT1_CNT
          RETI
;-----------------------------------------------------------
	  ORG	400H
RESET:
	  MOV   SP,#60H
	  MOV	P0,#30H	      ;set p0.4/5 "1",connect to Vcc.
          MOV   91H,#10H
          MOV   92H,#02H
	  SETB	P1.1	      ;set Led light
	  SETB  P1.4
	  MOV   TIME_L,#00H
	  MOV   TIME_H,#00H
	  MOV	TMOD,#11H     ;set t0 int mode.
	  MOV	TCON,#50H
	  MOV	INT1_CNT,#00H ;clear Int1 int times
	  SETB	IT1	      ;enable int1 and t0 int function
	  SETB	EX1
	  CLR	IE1	      ;clr Int1	int flag.
	  SETB	ET0
	  SETB	EA
MAIN_LOOP:
	  MOV	A,#40H
	  CLR	C
	  SUBB	A,TIME_L
	  JNC	MAIN_LOOP
	  
	  CLR	P1.1	      ;Close led
	  MOV	0A2H,#40H     ;Close Power_down	check
FFF:	  
	  NOP
 	  CLR   P1.1	  
	  MOV	PCON,#02H     ;Set power down,wait Int1	interrupt
	  
	  MOV   TH0,#00H
	  MOV   TL0,#00H
	  MOV	TIME_L,#00H
	  MOV	TIME_H,#00H
	  NOP
TEST_TIME:	  
	  MOV	A,#10H	      ;Led light for a short time,then goto FFF
	  CLR   C
	  SUBB  A,TIME_L
	  JNC   TEST_TIME
	  NOP
	  AJMP  FFF
	  
	  AJMP	MAIN_LOOP
CONTINUE:	  
	  NOP
	  NOP
	  NOP
	  NOP
	  NOP
	  AJMP	MAIN_LOOP

	  END