;;=======報警系統===========		
 			SDA EQU P3.6
			SCL EQU P3.7 
			phonenum EQU 03H     ;電話個數       

			ORG  0000H
			LJMP main
			ORG 0013H
			JMP INTPT1  
			org 000bh
			ljmp time0
			org 001bh
			ljmp time1

			ORG 0020H

main:
			CLR EA 
			MOV TMOD,#11H
			SETB ET0
                        setb et1
			MOV A,#00H
			MOV B,A 
			MOV R0,#20H
CLR_RAM:
			MOV @R0,A
			INC R0
			CJNE R0,#80H,CLR_RAM  
			mov sp,#60h     


MAIN1:
			MOV 3AH,#00H  ;電話表指針
			MOV 37H,#00h
			MOV IP,#02H
			clr IT1
                        mov tl0,#0b0h
                        mov th0,#3ch 
                        mov tl1,#0b0h
                        mov th1,#3ch
			mov P0,#0ffh
			mov P1,#0ffh
			MOV P2,#0FFH        ;p2.6 換為低電平驅動
			MOV P3,#0FEH
			SETB EA
                        setb tr1
;=========測試按鍵================
        	JNB P3.1,L2   
			MOV 30H,#16H
			LCALL delay10ms
			JNB P3.1,L2
			MOV 30H,#16H
			LCALL delay10ms
			JNB P3.1,L2
			LJMP pre_set  ;進入預置
L2:
			JB P3.2,Next0    ;中斷0  如果語音一直為低 就掛機
			MOV 30H,#16H
			LCALL delay10ms
			JB P3.2,Next0
			MOV 30H,#16H
			LCALL delay10ms
			JB P3.2,Next0
			lcall handfree;非低點評撥號因 
;-------------------------------------------
Next0:
			JNB P3.4,NEXT1
			MOV 30H,#10
			LCALL delay10ms
			JNB P3.4,NEXT1 
			MOV 30H,#10
			LCALL delay10ms
			JNB P3.4,NEXT1
			setb 00h         ;為開關中斷1的標志

NEXT1: 
			JNB P3.5,NEXT2
			MOV 30H,#16H
			LCALL delay10ms
			JNB P3.5,NEXT2
			MOV 30H,#16H
			LCALL delay10ms
			JNB P3.5,NEXT2
			clr 00h
;-------------------------------------------
NEXT2:
			JNB 00H,NEXTMAIN
			SETB EX1
			ljmp NEXTMAIN1
NEXTMAIN:
			CLR EX1
NEXTMAIN1:
			NOP
			NOP
			LJMP MAIN1
;=====================預置