main.lst

51系列单片机开发：实验课程 显示程序（液晶显示）

A51 MACRO ASSEMBLER  MAIN                                                                 11/20/2007 19:07:23 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN main.OBJ
ASSEMBLER INVOKED BY: C:\Program Files\Keil\C51\BIN\A51.EXE main.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1             ORG     0000H
0000 2100              2             AJMP    START
0100                   3             ORG     0100H
                       4     
0100                   5     START:
0100 759000            6             MOV     P1, #0                  ;消隐
0103 7808              7             MOV     R0, #8
0105 7900              8             MOV     R1, #0
0107 12010E            9     LOOP:   LCALL   DISPLAY
010A D8FB             10             DJNZ    R0, LOOP                ;判断8位数字是否送完
010C 2100             11             AJMP    START
                      12     
010E                  13     DISPLAY:
010E 900152           14             MOV     DPTR, #YOUNUMBER        ;寻找显示的数字
0111 E9               15             MOV     A, R1
0112 93               16             MOVC    A, @A+DPTR
0113 900140           17             MOV     DPTR, #TABSEG           ;寻找显示数字的码值
0116 93               18             MOVC    A, @A+DPTR
0117 F4               19             CPL     A
0118 F580             20             MOV     P0, A
011A D293             21             SETB    P1.3                    ;锁存码值信号
011C 00               22             NOP
011D C293             23             CLR     P1.3
011F 90014A           24             MOV     DPTR, #TABBIT           ;送位选信号
0122 E9               25             MOV     A, R1
0123 93               26             MOVC    A, @A+DPTR
0124 F580             27             MOV     P0, A
0126 D292             28             SETB    P1.2                    ;锁存位选信号
0128 00               29             NOP
0129 C292             30             CLR     P1.2
012B 3137             31             CALL    DELAY
012D 758000           32             MOV     P0, #0                  ;送消隐信号
0130 D292             33             SETB    P1.2
0132 00               34             NOP
0133 C292             35             CLR     P1.2
0135 09               36             INC     R1
0136 22               37             RET
                      38     
0137                  39     DELAY:
0137 7B19             40             MOV     R3, #25
0139 7C0A             41     LL1:    MOV     R4, #10
013B DCFE             42             DJNZ    R4, $
013D DBFA             43             DJNZ    R3, LL1
013F 22               44             RET
                      45     
0140                  46     TABSEG:                                 ;共阴数码管码表
0140 3F065B4F         47             DB      0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F
0144 666D7D07                
0148 7F6F                    
                      48      
014A                  49     TABBIT:                                 ;共阳数码管位选信号
014A 80402010         50             DB      0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01
014E 08040201                
                      51     
0152                  52     YOUNUMBER:                              ;要显示的数字
0152 02000007         53             DB      2,0,0,7,1,1,1,3         
0156 01010103                
                      54     
A51 MACRO ASSEMBLER  MAIN                                                                 11/20/2007 19:07:23 PAGE     2

                      55             END
                                     
A51 MACRO ASSEMBLER  MAIN                                                                 11/20/2007 19:07:23 PAGE     3

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


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

DELAY. . . . . . .  C ADDR   0137H   A   
DISPLAY. . . . . .  C ADDR   010EH   A   
LL1. . . . . . . .  C ADDR   0139H   A   
LOOP . . . . . . .  C ADDR   0107H   A   
P0 . . . . . . . .  D ADDR   0080H   A   
P1 . . . . . . . .  D ADDR   0090H   A   
START. . . . . . .  C ADDR   0100H   A   
TABBIT . . . . . .  C ADDR   014AH   A   
TABSEG . . . . . .  C ADDR   0140H   A   
YOUNUMBER. . . . .  C ADDR   0152H   A   


REGISTER BANK(S) USED: 0 


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