port_p1.lst

使用proteus和Keil联调SCM51,此例程精讲了P0口匚用

A51 MACRO ASSEMBLER  PORT_P1                                                              03/04/2008 20:57:41 PAGE     1


MACRO ASSEMBLER A51 V8.00b
OBJECT MODULE PLACED IN port_p1.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE port_p1.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1            org 00H
0000 74FE              2       loop:mov a,#0feh
0002 7A08              3            mov      r2,#8
0004 F590              4     output:mov p1,a
0006 23                5            rl a
0007 110E              6                acall delay
0009 DAF9              7                djnz r2,output
000B 020000            8                ljmp loop
000E 7E00              9     delay:mov r6,#0
0010 7F00             10               mov r7,#0
0012                  11     delayloop:
0012 DEFE             12           djnz r6,delayloop
0014 DFFC             13               djnz r7,delayloop
0016 22               14               ret
                      15               end
                             
A51 MACRO ASSEMBLER  PORT_P1                                                              03/04/2008 20:57:41 PAGE     2

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


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

DELAY. . . . . . .  C ADDR   000EH   A   
DELAYLOOP. . . . .  C ADDR   0012H   A   
LOOP . . . . . . .  C ADDR   0000H   A   
OUTPUT . . . . . .  C ADDR   0004H   A   
P1 . . . . . . . .  D ADDR   0090H   A   


REGISTER BANK(S) USED: 0 


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