123.lst

里面是单片机的开发板的源程序

A51 MACRO ASSEMBLER  123                                                                  06/03/2005 22:34:21 PAGE     1


MACRO ASSEMBLER A51 V6.12
OBJECT MODULE PLACED IN .\123.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE .\123.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     ;平凡教程第一课,如何点亮一个LED发光管
                       2     
0000                   3     LOOP: 
                       4     
0000 C290              5     CLR P1.0;用CLR命令使P1.1输出低电平,点亮LED
                       6     
0002 C292              7     CLR P1.2;用CLR命令使P1.1输出低电平,点亮LED
                       8     
0004 120009            9     LCALL DELAY;调用延时子程序DELAY
                      10     
0007 0100             11     AJMP LOOP;通笰JMP执行LOOP,从最开始循环执行,无限循环下去
                      12     
0009 7FFA             13     DELAY: MOV R7,#250
000B 7EFA             14     D1: MOV R6,#250
000D DEFE             15     D2: DJNZ R6,D2
000F DFFA             16     DJNZ R7,D1
0011 22               17     RET
                      18     END
                             
                             
A51 MACRO ASSEMBLER  123                                                                  06/03/2005 22:34:21 PAGE     2

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


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

D1 . . . . . . . .  C ADDR   000BH   A   
D2 . . . . . . . .  C ADDR   000DH   A   
DELAY. . . . . . .  C ADDR   0009H   A   
LOOP . . . . . . .  C ADDR   0000H   A   
P1 . . . . . . . .  D ADDR   0090H   A   


REGISTER BANK(S) USED: 0 


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