happy.lst

51单片机实验例程

A51 MACRO ASSEMBLER  HAPPY                                                                04/06/2010 14:58:13 PAGE     1


MACRO ASSEMBLER A51 V7.09
OBJECT MODULE PLACED IN happy.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE happy.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     
                       2     
                       3     
                       4     
0000                   5                     ORG     0000H                   ;伪指令，指定程序从8000H开始存放
0000 2100              6                     AJMP    MAIN                    ;跳转指令，程序跳转到MAIN处
                       7     
0100                   8                     ORG     0100H                   ;伪指令，指定以下程序从8100H开始存放
0100                   9     MAIN:
0100 75813C           10                     MOV     SP,#60                  ;给堆栈指针赋初值
0103 3107             11     LOOP:           ACALL   MUSIC
0105 2103             12                     AJMP    LOOP
                      13     
                      14     
                      15     ;***********************
                      16     ;蜂鸣器输出声响子程序
                      17     ;**********************
0107                  18     MUSIC:
0107 7D60             19                     MOV     R5,#60H                 ;控制音长
0109                  20     MIC:
0109 B295             21                     CPL     P1.5
010B 3110             22                     ACALL   DELAY5MS                ;控制音调
010D DDFA             23                     DJNZ    R5,MIC
010F 22               24                     RET
                      25     
                      26     
                      27     ;***************
                      28     ;延时子程序
                      29     ;***************
0110                  30     DELAY5MS:
0110 7F03             31                         MOV R7,#3H
0112 7E40             32     DELAY0:         MOV     R6,#40H
0114 DEFE             33     DELAY1:         DJNZ    R6,DELAY1
0116 DFFA             34                     DJNZ    R7,DELAY0
0118 22               35                     RET
                      36                     ;
                      37                     END
                             
A51 MACRO ASSEMBLER  HAPPY                                                                04/06/2010 14:58:13 PAGE     2

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


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

DELAY0 . . . . . .  C ADDR   0112H   A   
DELAY1 . . . . . .  C ADDR   0114H   A   
DELAY5MS . . . . .  C ADDR   0110H   A   
LOOP . . . . . . .  C ADDR   0103H   A   
MAIN . . . . . . .  C ADDR   0100H   A   
MIC. . . . . . . .  C ADDR   0109H   A   
MUSIC. . . . . . .  C ADDR   0107H   A   
P1 . . . . . . . .  D ADDR   0090H   A   
SP . . . . . . . .  D ADDR   0081H   A   


REGISTER BANK(S) USED: 0 


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