text1.lst

一个方便单片机延时子程序的源代码,可以在使用时只需改写数值即可(目前为一秒定时)及记数得程序

A51 MACRO ASSEMBLER  TEXT1                                                                05/12/2009 10:29:21 PAGE     1


MACRO ASSEMBLER A51 V7.08a
OBJECT MODULE PLACED IN Text1.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE Text1.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000 7A37              1     START:  MOV R2,#55
0002 C3                2             CLR C
0003 EA                3             MOV A,R2
0004 940A              4     L0:     SUBB A,#10
0006 4005              5             JC L1
0008 0530              6             INC 30H
000A 020004            7             LJMP L0
000D F531              8     L1:     MOV 31H,A
000F E530              9             MOV A,30H
0011 900028           10             MOV DPTR,#TAB
0014 93               11             MOVC A,@A+DPTR
0015 7590FD           12             MOV P1,#11111101B
0018 F5A0             13             MOV P2,A
001A E531             14             MOV A,31H
001C 900028           15             MOV DPTR,#TAB
001F 93               16             MOVC A,@A+DPTR
0020 7590FE           17             MOV P1,#11111110B
0023 F5A0             18             MOV P2,A
0025 020000           19             LJMP START
0028 33225566         20     TAB:    DB 33H,22H,55H,66H,77H,88H,99H,55H
002C 77889955                
                      21             END
A51 MACRO ASSEMBLER  TEXT1                                                                05/12/2009 10:29:21 PAGE     2

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

L0 . . . . . . . .  C ADDR   0004H   A   
L1 . . . . . . . .  C ADDR   000DH   A   
P1 . . . . . . . .  D ADDR   0090H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   
START. . . . . . .  C ADDR   0000H   A   
TAB. . . . . . . .  C ADDR   0028H   A   


REGISTER BANK(S) USED: 0 


ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)