io2.lst

单片机实验与实践教程(一)的全部实验的源程序库

A51 MACRO ASSEMBLER  IO2                                                                  11/22/2003 16:59:40 PAGE     1


MACRO ASSEMBLER A51 V6.12
OBJECT MODULE PLACED IN Io2.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE Io2.asm DB

LOC  OBJ            LINE     SOURCE

                       1     ;〈2〉实验B      8个发光二极管同时亮、灭
0000                   2                     ORG     0000H
0000 020100            3                     LJMP    MAIN
0100                   4                     ORG     0100H
0100 758107            5     MAIN:           MOV     SP,#7
0103 74FF              6                     MOV     A,#0FFH         ;先让发光二极管全亮
0105 F590              7     LOOP:           MOV     P1,A                 ;从P1口输出到发光二极管
0107 12010D            8                     LCALL   DELAY           ;延时2秒
010A F4                9                     CPL     A                               ;取反
010B 80F8             10                     SJMP    LOOP
010D 7814             11     DELAY:          MOV     R0,#20          ;延时2秒子程序，使用R0、R6、R7
010F 7F64             12     DELY0:          MOV     R7,#100         ;延时0.1秒              
0111 7EFA             13     DELY1:          MOV     R6,#250         ;延时1mS
0113 DEFE             14                     DJNZ    R6,$
0115 DFFA             15                     DJNZ    R7,DELY1
0117 D8F6             16                     DJNZ    R0,DELY0
0119 22               17                     RET
                      18                     END
                             
A51 MACRO ASSEMBLER  IO2                                                                  11/22/2003 16:59:40 PAGE     2

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


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

DELAY. . . . . . .  C ADDR   010DH   A   
DELY0. . . . . . .  C ADDR   010FH   A   
DELY1. . . . . . .  C ADDR   0111H   A   
LOOP . . . . . . .  C ADDR   0105H   A   
MAIN . . . . . . .  C ADDR   0100H   A   
P1 . . . . . . . .  D ADDR   0090H   A   
SP . . . . . . . .  D ADDR   0081H   A   


REGISTER BANK(S) USED: 0 


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