led_left.lst

流水灯：灯从最低位P0.0开始向高位依次点亮

A51 MACRO ASSEMBLER  LED_LEFT                                                             07/02/2007 23:23:27 PAGE     1


MACRO ASSEMBLER A51 V7.02a
OBJECT MODULE PLACED IN led_left.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE led_left.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1             ORG 0000H
0000 0130              2             AJMP MAIN
0030                   3             ORG 0030H
0030                   4     MAIN:
0030 758001            5             MOV P0 , #01h
0033 E580              6             MOV A ,P0
0035 23                7     LOOP:   RL A
0036 120040            8             LCALL DELAY
0039 F580              9             MOV P0,A
003B 120040           10             LCALL DELAY
003E 80F5             11             SJMP LOOP
                      12     
0040 7EFF             13     DELAY:  MOV R6,#255
0042 7FFF             14     D1:     MOV R7,#255
0044 DFFE             15             DJNZ R7,$
0046 DEFA             16             DJNZ R6,D1
0048 22               17             RET
                      18             END
A51 MACRO ASSEMBLER  LED_LEFT                                                             07/02/2007 23:23:27 PAGE     2

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


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

D1 . . . . . . . .  C ADDR   0042H   A   
DELAY. . . . . . .  C ADDR   0040H   A   
LOOP . . . . . . .  C ADDR   0035H   A   
MAIN . . . . . . .  C ADDR   0030H   A   
P0 . . . . . . . .  D ADDR   0080H   A   


REGISTER BANK(S) USED: 0 


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