led.lst

at89s51实验例程代码

A51 MACRO ASSEMBLER  LED                                                                  01/28/2007 16:42:28 PAGE     1


MACRO ASSEMBLER A51 V6.23
OBJECT MODULE PLACED IN .\LED.obj
ASSEMBLER INVOKED BY: d:\Keil\C51\BIN\A51.EXE ..\..\跑马灯\ASM\LED.ASM SET(SMALL) DEBUG PRINT(.\LED.lst) OBJECT(.\LED.ob
                      j) EP

LOC  OBJ            LINE     SOURCE

                       1     ;实验名称：走马灯
                       2     ;  功能：LED从LED1循环到LED8。
                       3     ;  作者：http://www.mcuyjf.com.cn
                       4     ;        05-02-01
                       5     ;***********************************************************
  0030                 6     LED1_8          EQU     30H             ;循环显示的内容
0000                   7                     ORG     0000H
0000 0130              8                     AJMP    MAIN
0030                   9                     ORG     0030H
0030 7530FE           10     MAIN:           MOV     LED1_8,#0FEH    ;为0灯亮
0033 E530             11                     MOV     A,LED1_8
0035 F590             12     LOOP:           MOV     P1,A
0037 113C             13                     ACALL   DELAY           ;调用延时
0039 03               14                     RR      A
003A 80F9             15                     SJMP    LOOP
                      16     
                      17     ;延时子程序
003C 7FFA             18     DELAY:          MOV     R7,#0FAH
003E 7EFA             19     DELAY_1:        MOV     R6,#0FAH
0040 00               20     DELAY_2:        NOP
0041 00               21                     NOP
0042 00               22                     NOP
0043 00               23                     NOP
0044 00               24                     NOP
0045 DEF9             25                     DJNZ    R6,DELAY_2
0047 DFF5             26                     DJNZ    R7,DELAY_1
0049 22               27                     RET
                      28                     
                      29                     END
A51 MACRO ASSEMBLER  LED                                                                  01/28/2007 16:42:28 PAGE     2

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


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

DELAY. . . . . . .  C ADDR   003CH   A   
DELAY_1. . . . . .  C ADDR   003EH   A   
DELAY_2. . . . . .  C ADDR   0040H   A   
LED1_8 . . . . . .  N NUMB   0030H   A   
LOOP . . . . . . .  C ADDR   0035H   A   
MAIN . . . . . . .  C ADDR   0030H   A   
P1 . . . . . . . .  D ADDR   0090H   A   


REGISTER BANK(S) USED: 0 


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