;************************************************
;              按鍵中斷報(bào)警.dt
;************************************************
 PORT6    ==        0x06                ;定義端口6，7
 PORT7    ==        0x07
;-----------------------------------------------------------------------
 IOCE     ==        0x0E                ;定義看門(mén)狗控制寄存器IOCE
 IOCF     ==        0x0F                ;定義中斷屏蔽寄存器IOCF
 ISR      ==        0X3F                ;定義中斷狀態(tài)寄存器ISR
;-----------------------------------------------------------------------
 DLY1     ==        13                  ;定義延時(shí)暫存單元DLY1，DLY2，DLY3
 DLY2     ==        14 
 DLY3     ==        15
 COUNT    ==        16                  ;定義計(jì)數(shù)暫存單元COUNT
 EXIE     ==        3                   ;定義中斷屏蔽寄存器的第3位EXIE
                                        ;允許外部中斷時(shí)需將EXIE置1
 EXIF     ==        3                   ;定義中斷狀態(tài)寄存器的第3位EXIT
                                        ;中斷響應(yīng)以后EXIF自動(dòng)置1，要用程序清0
;-----------------------------------------------------------------------
          ORG       0x00
          JMP       INIT

          ORG       0x01
          JMP       INT_SERVICE

 INIT:    MOV       A,@0x00             ;設(shè)定P6口，P7口全部為輸出
          IOW       PORT6            
          IOW       PORT7
          MOV       A,@0X11             ;關(guān)閉看門(mén)狗功能   
          IOW       IOCE              
          MOV       A,@0XFF             ;LED數(shù)碼管顯示全暗 
          MOV       PORT6,A        
          MOV       A,@0X20             ;設(shè)定延時(shí)時(shí)間
          MOV       DLY3,A
          BC        PORT7,1             ;P71低電平，繼電器接通，電動(dòng)機(jī)運(yùn)行
          MOV       A,@0x0A             ;為計(jì)數(shù)器置數(shù)10
          MOV       COUNT,A
          MOV       A,@0B00001000       ;將中斷屏蔽寄存器第3位置1，允許外部中斷
          IOW       IOCF
;-----------------------------------------------------------------------
 MAIN:    ENI                           ;允許中斷,將控制寄存器第6位INT置1
 MAIN1:   JMP       MAIN1               ;等中斷
   
;-----------------------------------------------------------------------
 INT_SERVICE:BS   PORT7,1               ;P71高電平，繼電器斷開(kāi)，電動(dòng)機(jī)仃止
 INT_S1   MOV     A,@0X00               ;LED數(shù)碼管顯示全亮
          MOV     PORT6,A
          CALL    DELAY                 ;延時(shí)
          MOV     A,@0XFF               ;LED數(shù)碼管顯示全暗
          MOV     PORT6,A
          CALL    DELAY                 ;延時(shí)
          DJZ     COUNT                 ;計(jì)數(shù)器減1，閃爍10次到否？
          JMP     INT_S1                ;未到，繼續(xù)閃爍
          BC      ISR,EXIF              ;已到，清除中斷響應(yīng)標(biāo)志，為下次中斷作準(zhǔn)備
          MOV     A,@0x0A               ;重新為計(jì)數(shù)器置數(shù)10
          MOV     COUNT,A
          BC      PORT7,1               ;P71底電平，繼電器接通，電動(dòng)機(jī)運(yùn)行
          RETI                          ;中斷返回，將控制寄存器第6位INT置1
;-----------------------------------------------------------------------
 DELAY:   MOV       A,@20               ;1*(DLY3) 延時(shí)子程序
          MOV       DLY2,A              ;1*(DLY3)
 INNER2:  MOV       A,@5                ;1*(DLY3)*(250)
          MOV       DLY1,A              ;1*(DLY3)*(250)
 INNER1:  DJZ       DLY1                ;1*(DLY3)*(250)*(133)
          JMP       INNER1              ;2*(DLY3)*(250)*(133)
          DJZ       DLY2                ;1*(DLY3)*(250)
          JMP       INNER2              ;2*(DLY3)*(250)
          DJZ       DLY3                ;1*(DLY3)
          JMP       DELAY               ;2*(DLY3)
          RET                           ;延時(shí)子程序返回
          EOP