ad0809.lst

51单片机用汇编实例 包括ad

A51 MACRO ASSEMBLER  AD0809                                                               12/31/2005 10:51:47 PAGE     1


MACRO ASSEMBLER A51 V7.09
OBJECT MODULE PLACED IN AD0809.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE AD0809.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     ;===============================================================
                       2     ; 文件名称: AD0809.ASM
                       3     ; 功能描述: 将0V~5V信号源接入ADC0809的IN0端, 采集电压值.
                       4     ;===============================================================
                       5     
  7F00                 6     STARTAD  EQU 7F00H
  7F08                 7     ADRESULT EQU 7F08H
                       8     
0000                   9             ORG 0000H
0000 020100           10             LJMP START
0100                  11             ORG 0100H
0100 120106           12     START:  LCALL AD0809            ;调用AD
0103 00               13             NOP                     ;设置断点, 观察R0中的值
0104 80FA             14             SJMP START
                      15     
                      16     ;AD数据采集, 出口参数: R0
0106 907F00           17     AD0809: MOV DPTR, #STARTAD      
0109 7400             18             MOV A, #00H
010B F0               19             MOVX @DPTR, A           ;启动AD
010C 20B3FD           20     ADLP1:  JB P3.3, ADLP1          ;等待AD转换结束
010F 120119           21             LCALL DELAY
0112 00               22             NOP
0113 907F08           23             MOV DPTR, #ADRESULT
0116 E0               24             MOVX A, @DPTR
0117 F8               25             MOV R0, A               ;保存AD转换结果
0118 22               26             RET
                      27     
0119 7F30             28     DELAY:  MOV R7, #30H
011B 7EF0             29     DLP1:   MOV R6, #0F0H
011D DEFE             30     DLP2:   DJNZ R6, DLP2
011F DFFA             31             DJNZ R7, DLP1
0121 22               32             RET
                      33     
                      34             END
A51 MACRO ASSEMBLER  AD0809                                                               12/31/2005 10:51:47 PAGE     2

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


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

AD0809 . . . . . .  C ADDR   0106H   A   
ADLP1. . . . . . .  C ADDR   010CH   A   
ADRESULT . . . . .  N NUMB   7F08H   A   
DELAY. . . . . . .  C ADDR   0119H   A   
DLP1 . . . . . . .  C ADDR   011BH   A   
DLP2 . . . . . . .  C ADDR   011DH   A   
P3 . . . . . . . .  D ADDR   00B0H   A   
START. . . . . . .  C ADDR   0100H   A   
STARTAD. . . . . .  N NUMB   7F00H   A   


REGISTER BANK(S) USED: 0 


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