led display.lst

我的大学单片机课程案例和ppt

A51 MACRO ASSEMBLER  LED_DISPLAY                                                          11/18/2006 17:07:13 PAGE     1


MACRO ASSEMBLER A51 V7.10
OBJECT MODULE PLACED IN LED Display.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE LED Display.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

  0030                 1     DISP_CNT        EQU             30H
  0031                 2     TCNT            EQU             31H
0000                   3                     ORG             00H
0000 800C              4                     SJMP    START
000B                   5                     ORG             0BH
000B 020033            6                     LJMP    INT_T0
000E 753000            7     START:  MOV             DISP_CNT,#00H
0011 753100            8                     MOV             TCNT,#00H
0014 75A000            9                     MOV             P2,#00H
0017 758901           10                     MOV             TMOD,#01H
001A 758CEC           11                     MOV             TH0,#(65536-5000)/256
001D 758A78           12                     MOV             TL0,#(65536-5000)MOD 256
0020 75A882           13                     MOV             IE,#82H
0023 D28C             14                     SETB    TR0
                      15     
0025 E530             16     DISP:   MOV             A,DISP_CNT                                      ;段码组号       
0027 90005E           17                     MOV             DPTR,#TABLE
002A A8A0             18                     MOV             R0,P2                                           ;读取位选信
                             息
002C 28               19                     ADD             A,R0                                            ;得到偏移地
                             址
002D 93               20                     MOVC    A,@A+DPTR
002E F580             21                     MOV             P0,A                                            ;取出段码显
                             示
0030 020025           22                     LJMP    DISP
                      23     
0033 758CEC           24     INT_T0: MOV             TH0,#(65536-5000)/256
0036 758A78           25                     MOV             TL0,#(65536-5000)MOD 256                
0039 05A0             26                     INC             P2                                                      ;事
                             牍芪谎⌒藕