led_num.lst

51单片机实验例程

A51 MACRO ASSEMBLER  LED_NUM                                                              11/02/2009 21:30:30 PAGE     1


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

LOC  OBJ            LINE     SOURCE

                       1     ;*******************************************************************************
                       2     ;*  标题:                  试验数码管静态显示数字                              *
                       3     ;*                                                                                         
                                                                                             *
                       4     ;*  连接方法：JP10 （P0）与JP3 用8PIN排线连接                                  *
                       5     ;********************************************************************************
                       6     ;*                                                                                         
                                                         *
                       7     ;* 请学员认真消化本例程，用单片机脚直接控制数码管                              *
                       8     ;********************************************************************************/      
0000                   9             ORG 0000H
0000 020030           10             LJMP INTI
0030                  11             ORG 030H
0030 752000           12     INTI:   MOV 20H,#00H
0033 E520             13                 MOV A,20H
                      14     
0035                  15     MAIN:   
0035 540F             16             ANL A,#0FH          ;屏蔽累加器的高4位
0037 900100           17             MOV DPTR,#TAB   ;将数据表格的首地址 0100H存入16位的数据地址指针DPTR中
003A 93               18             MOVC A,@A+DPTR  ;查表
003B F580             19             MOV P0,A            
003D 1147             20             ACALL DEL           ;调用延时子程序
003F E520             21             MOV A,20H               ;将20H单元的数据传送给累加器
0041 04               22             INC A                   ;累加器+1
0042 D4               23             DA A                    ;二-十进制调整
0043 F520             24             MOV 20H, A               
0045 0135             25             AJMP MAIN
                      26     
                      27     ;--------------------------------------------------------------
                      28     ;延时子程序
                      29     ;--------------------------------------------------------------
0047 7F10             30     DEL:    MOV R7,#010H
0049 7EFF             31     DEL1:   MOV R6,#0FFH
004B 7D1F             32     DEL2:   MOV R5,#01FH
004D DDFE             33     DEL3:   DJNZ R5,DEL3
004F DEFA             34             DJNZ R6,DEL2
0051 DFF6             35             DJNZ R7,DEL1
0053 22               36             RET
                      37     
                      38     
0100                  39             ORG 0100H
0100 C0F9A4B0         40     TAB:    DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H         ;LED字模表
0104 999282F8                
0108 80908883         41             DB 80H,90H,88H,83H,0C6H,0A1H,86H,08EH
010C C6A1868E                
                      42             END
                             
                             ;/此表为 LED 的字模            
                             ; 0    1    2    3    4    5    6   7    8    9    A    b    c    d    E    -    L   P    U
                                 Hidden  _ (20)
                             ;{ 0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0xbf,0xc7,0x8
                             c,0xc1, 0xff,  0xf7 }; 
                             
A51 MACRO ASSEMBLER  LED_NUM                                                              11/02/2009 21:30:30 PAGE     2

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


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

DEL. . . . . . . .  C ADDR   0047H   A   
DEL1 . . . . . . .  C ADDR   0049H   A   
DEL2 . . . . . . .  C ADDR   004BH   A   
DEL3 . . . . . . .  C ADDR   004DH   A   
INTI . . . . . . .  C ADDR   0030H   A   
MAIN . . . . . . .  C ADDR   0035H   A   
P0 . . . . . . . .  D ADDR   0080H   A   
TAB. . . . . . . .  C ADDR   0100H   A   


REGISTER BANK(S) USED: 0 


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