?? external interrupt.lst
字號:
A51 MACRO ASSEMBLER EXTERNAL_INTERRUPT 07/29/2006 19:31:20 PAGE 1
MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN External Interrupt.OBJ
ASSEMBLER INVOKED BY: e:\Program Files\Keil\C51\BIN\A51.EXE External Interrupt.asm SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
0090 1 LED BIT P1.0
0030 2 LEDBUF EQU 30H
0000 3 ORG 00H
0000 020006 4 LJMP START
0003 5 ORG 03H
0003 020013 6 LJMP INTERRUPT
0006 C230 7 START: CLR LEDBUF
0008 C290 8 CLR LED
000A 758801 9 MOV TCON,#01H ;外部中斷0下降沿觸發
000D 75A881 10 MOV IE,#81H ;打開外部中斷允許位（EX0）
11 ;及總中斷允許位（EA）
0010 020010 12 LJMP $ ;等待中斷
0013 13 INTERRUPT:
0013 C0D0 14 PUSH PSW ;保護現場
0015 B230 15 CPL LEDBUF ;取反LED
0017 A230 16 MOV C,LEDBUF
0019 9290 17 MOV LED,C
001B D0D0 18 POP PSW ;恢復現場
001D 32 19 RETI
20 END
A51 MACRO ASSEMBLER EXTERNAL_INTERRUPT 07/29/2006 19:31:20 PAGE 2
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
IE . . . . . . . . D ADDR 00A8H A
INTERRUPT. . . . . C ADDR 0013H A
LED. . . . . . . . B ADDR 0090H.0 A
LEDBUF . . . . . . N NUMB 0030H A
P1 . . . . . . . . D ADDR 0090H A
PSW. . . . . . . . D ADDR 00D0H A
START. . . . . . . C ADDR 0006H A
TCON . . . . . . . D ADDR 0088H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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