謝謝大家了�。。。。。。。�！

;報(bào)警聲程序

;1.蜂鳴器和繼電器 共用p2.2 ，跳線J5設(shè)置到23端選中蜂鳴器

CODE_SEG SEGMENT CODE 
DATA_SEG SEGMENT DATA
STACK_SEG SEGMENT IDATA

SPK BIT P2.2

 RSEG DATA_SEG
FRQ:   DS   1
TMP:   DS   1

 RSEG STACK_SEG
STACK: DS 20

;==========================
CSEG AT 00000H
 LJMP MAIN


CSEG AT 0000BH
 LJMP TIMER0
 
 
 
;==========================

 RSEG CODE_SEG
MAIN:
 USING 0
 
 MOV SP,#(STACK-1)
 
 MOV   TMOD,#01H
 CLR   A
 MOV   FRQ,A
 MOV   TH0,A
 MOV   TL0,#0FFH
 SETB  TR0
 MOV   IE,#082H
 
MAIN_LP:

 INC   FRQ
 
 MOV   R7,#04  ; 
 LCALL DELAYMS

 SJMP  MAIN_LP
 
; END OF main

;==========================
TIMER0:
 MOV   TH0,#0FEH
 MOV   TL0,frq
 CPL   SPK
 RETI  
; END OF TIMER0


;==========================
DELAYMS:
; 延時(shí)子程序
; 傳入?yún)��?shù)：R7 --- 延時(shí)值(MS) 
; 返回值：無

 MOV A,R7
 JZ END_DLYMS 
DLY_LP1:
 MOV R6,#185
DLY_LP2:
 NOP
 NOP
 NOP
 DJNZ R6,DLY_LP2
 DJNZ R7,DLY_LP1

END_DLYMS:
 RET 

 END

;流水燈程序

PORT EQU  P1
    ORG    0000H                ;主程序開始地址0000H
             AJMP   START                ;跳轉(zhuǎn)到地址MAIN處執(zhí)行
             ORG    0030H                ;主程序地址0030H
START:       CALL    LEFT                ;設(shè)定左移次數(shù),存放于寄存器R5
             CALL   RIGHT                ;將數(shù)據(jù)FFH賦值給A
             JMP     START                ;跳轉(zhuǎn)到START
            
             ;以下是左移子程序
LEFT:        PUSH    PSW                 ;將PSW壓入堆棧 
             SETB    RS1                 ;將RS1置1,同下一條指令一起
                                         ;選定寄存器組2
             CLR     RS0                 ;將RS0置0
             MOV    R4,#8                ;將數(shù)據(jù)8賦值給R4
             MOV    A,#0FFH              ;將數(shù)據(jù)FFH賦值給A
             CLR     C                    ;將進(jìn)位位C清0
NEXT1:       RLC     A                   ;帶進(jìn)位左移

             MOV    PORT,A                ;將A中數(shù)據(jù)賦給P2
             CALL    LATER              ;調(diào)用延時(shí)程序
             DJNZ   R4,NEXT1            ;R4=R4-1,R4≠0時(shí),轉(zhuǎn)到NEXT1 
             POP     PSW                 ;出棧到PSW
             RET                         ;子程序結(jié)束,返回主程序
             ;以下是右移子程序
RIGHT:       PUSH    PSW                 ;PSW壓入堆棧
             SETB    RS1                 ;將RS1置1,同下一條指令一起選定
                                         ;寄存器組2
             SETB    RS0                 ;將RS0置1
             MOV    R4,#8                ;將數(shù)據(jù)8賦值給R4
             MOV    A,#0FFH              ;將數(shù)據(jù)FFH賦值給A
             CLR     C                   ;將進(jìn)位為清0
NEXT2:       RRC     A                   ;帶進(jìn)位位右移A
             MOV    P1,A                 ;將A中數(shù)據(jù)賦給P2
             CALL    LATER               ;調(diào)用延時(shí)程序
             DJNZ   R4,NEXT2             ;R4=R4-1,R4≠0時(shí),轉(zhuǎn)到NEXT2
             POP     PSW                 ;出棧到PSW
             RET                         ;子程序結(jié)束,返回主程序
             ;以下是延時(shí)子程序
LATER:       MOV   R7,#0FFH             ;
AD1:         MOV   R6,#0A0H             ;
AD2:         DJNZ   R6,AD2              ;
             DJNZ   R7,AD1              ;
             RET                        ; 
             END