cufirst.lst

8051单片机 a51 投票器 带控制端 含原理图

A51 MACRO ASSEMBLER  CUFIRST                                                              05/21/2008 02:07:42 PAGE     1


MACRO ASSEMBLER A51 V8.01
OBJECT MODULE PLACED IN cufirst.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE cufirst.a51 SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     ;EEPROM PORT DEFINITIONS ETC.
  0096                 2     SDA1 EQU P1.6
  0097                 3     SCL1 EQU P1.7
                       4     
                       5     
  00A0                 6     WTCMD EQU   10100000B       ;WRITE DATA COMMAND 
  00A1                 7     RDCMD EQU   10100001B       ;READ DATA COMMAND 
                       8     
  007E                 9     HBADD EQU 7Eh
  007F                10     MEMORY EQU 7Fh
                      11     
                      12     
                      13     
                      14     
0000                  15     ORG 0000h
0000 020003           16     LJMP MAIN
                      17     
0003                  18     MAIN:
                      19     
                      20     ;************************ROUTINE TO SET STATUS AS ZERO***********************
                      21     
                      22     
                      23     
0003 74A0             24     MOV A,#WTCMD ;LOAD WRITE COMMAND
                      25     
0005 1115             26                    CALL OUTS ;SEND IT
                      27     
0007 7400             28                    MOV A,#00H ;GET BYTE ADDRESS
                      29     
0009 1142             30                    CALL OUT ;SEND IT
                      31     
000B 7400             32                    MOV A,#00H ;GET DATA
                      33     
000D 1142             34                    CALL OUT ;SEND IT
                      35     
000F 1161             36                    CALL STOP ;SEND STOP CONDITION
0011 11C7             37     ACALL DELAY_STOP
0013 80FE             38     JMP $
                      39     
                      40        
                      41     
                      42     
                      43     
                      44     
                      45     
                      46     
0015 7A08             47     OUTS:   MOV     R2,#8           ;LOOP COUNT -- EQUAL TO BIT COUNT
                      48     
0017 D296             49             SETB   SDA1            ;INSURE DATA IS HI               
                      50     
0019 D297             51             SETB    SCL1            ;INSURE CLOCK IS HI
                      52     
001B 00               53             NOP                     ;NOTE 1
                      54     
001C 00               55             NOP                     
                      56     
001D 00               57             NOP
                      58     
A51 MACRO ASSEMBLER  CUFIRST                                                              05/21/2008 02:07:42 PAGE     2

001E C296             59             CLR     SDA1            ;START CONDITION -- DATA = 0
                      60     
0020 00               61             NOP                     ;NOTE 1
                      62     
0021 00               63             NOP      
                      64     
0022 00               65             NOP
                      66     
0023 C297             67             CLR     SCL1            ;CLOCK = 0
                      68     
0025 33               69     OTSLP:  RLC     A               ;SHIFT BIT
                      70     
0026 5004             71             JNC     BITLS
                      72     
0028 D296             73             SETB    SDA1            ;DATA = 1
                      74     
002A 8002             75             JMP     OTSL1           ;CONTINUE
                      76     
002C C296             77     BITLS:  CLR     SDA1            ;DATA = 0
                      78     
002E D297             79     OTSL1:  SETB    SCL1            ;CLOCK HI
                      80     
0030 00               81             NOP                     ;NOTE 1
                      82     
0031 00               83             NOP
                      84     
0032 00               85             NOP
                      86     
                      87             
                      88     
0033 C297             89             CLR     SCL1            ;CLOCK LOW
                      90     
0035 DAEE             91             DJNZ    R2,OTSLP        ;DECREMENT COUNTER
                      92     
0037 D296             93             SETB    SDA1            ;TURN PIN INTO INPUT
                      94     
0039 00               95             NOP                     ;NOTE 1
                      96     
                      97                                  
                      98     
003A D297             99             SETB    SCL1            ;CLOCK ACK
                     100     
003C 00              101             NOP                     ;NOTE 1
                     102     
003D 00              103             NOP
                     104     
003E 00              105             NOP
                     106     
                     107           
                     108     
003F C297            109             CLR     SCL1
                     110     
0041 22              111             RET
                     112     
                     113     
                     114     
                     115     
                     116     ;**********************************************************************
                     117     
                     118     ; THIS ROUTINE SENDS OUT CONTENTS OF ACCUMLATOR TO EEPROM
                     119     
                     120     ; without sending a START condition.
                     121     
                     122     ;**********************************************************************
                     123     
                     124     
A51 MACRO ASSEMBLER  CUFIRST                                                              05/21/2008 02:07:42 PAGE     3

                     125     
                     126     
0042 7A08            127     OUT:    MOV     R2,#8           ;LOOP COUNT -- EQUAL TO BIT COUNT
                     128     
0044 33              129     OTLP:   RLC     A               ;SHIFT BIT
                     130     
0045 5004            131             JNC     BITL            
                     132     
0047 D296            133             SETB    SDA1            ;DATA = 1
                     134     
0049 8002            135             JMP     OTL1            ;CONTINUE
                     136     
004B C296            137     BITL:   CLR     SDA1            ;DATA = 0
                     138     
004D D297            139     OTL1:   SETB    SCL1            ;CLOCK HI
                     140     
004F 00              141             NOP                     ;NOTE 1
                     142     
0050 00              143             NOP
                     144     
0051 00              145             NOP
                     146     
                     147          
                     148     
0052 C297            149             CLR     SCL1            ;CLOCK LOW
                     150     
0054 DAEE            151             DJNZ    R2,OTLP         ;DECREMENT COUNTER
                     152     
0056 D296            153             SETB    SDA1            ;TURN PIN INTO INPUT
                     154     
0058 00              155             NOP                     ;NOTE 1
                     156     
                     157          
                     158     
0059 D297            159             SETB    SCL1            ;CLOCK ACK
                     160     
005B 00              161             NOP                     ;NOTE 1
                     162     
005C 00              163             NOP
                     164     
005D 00              165             NOP
                     166     
                     167           
                     168     
005E C297            169             CLR     SCL1
                     170     
0060 22              171             RET
                     172     
                     173     
                     174     
                     175     
                     176     
                     177     
                     178     
0061 C296            179     STOP:   CLR     SDA1            ;STOP CONDITION SET DATA LOW
                     180     
0063 00              181             NOP                     ;NOTE 1
                     182     
0064 00              183             NOP
                     184     
0065 00              185             NOP
                     186     
                     187           
                     188     
0066 D297            189             SETB    SCL1            ;SET CLOCK HI
                     190     
A51 MACRO ASSEMBLER  CUFIRST                                                              05/21/2008 02:07:42 PAGE     4

0068 00              191             NOP                     ;NOTE 1
                     192     
0069 00              193             NOP
                     194     
006A 00              195             NOP
                     196     
                     197           
                     198     
006B D296            199             SETB    SDA1            ;SET DATA HIGH
                     200     
006D 22              201             RET
                     202     
                     203     ;*******************************************************************
                     204     
                     205     ; THIS ROUTINE READS A BYTE OF DATA FROM EEPROM
                     206     
                     207     ; From EEPROM current address pointer.
                     208     
                     209     ; Returns the data byte in R1
                     210     
                     211     ;*******************************************************************
                     212