delay1ms.lst

EasyStudy51-II单片机开发系统的库函数源代码.包含了EasyStudy51-II硬件的全部驱动.

A51 MACRO ASSEMBLER  DELAY1MS                                                             11/06/2008 01:10:39 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN delay1ms.obj
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE a51\delay1ms.a51 SET(SMALL) DEBUG PRINT(.\delay1ms.lst) OBJECT(delay1ms.ob
                      j) EP

LOC  OBJ            LINE     SOURCE

                       1     
                       2     
                       3     NAME            DELAY1MS
                       4     PUBLIC          ES51_DELAY1MS
                       5     
                       6     ES51            segment code
----                   7     RSEG            ES51
                       8                     
0000                   9     ES51_DELAY1MS:
                      10     ; 延时1毫秒;1000微妙  [假设时钟为12MHZ];
                      11     ; 此延时程序算上调用指令[LCALL]和返回指令[RET]; 
                      12     ; 2+1+[(3*32)+1+2]*10+1+2*2+2 = 1000us
                      13     ;               LCALL   DELAY1MS        ; 2     
0000 790A             14                     MOV     R1,#10          ; 1
0002                  15     LOOP_NEXT:      
0002 7820             16                     MOV     R0,#32          ; 1
0004                  17     LOOP:           
0004 00               18                     NOP                     ; 
0005 D8FD             19                     DJNZ    R0,LOOP         ; (2+1)*32 = 96
0007 D9F9             20                     DJNZ    R1,LOOP_NEXT    ; (96+1+2)*10 = 990
                      21     
0009 7802             22                     MOV     R0,#2           ; 1
000B D8FE             23                     DJNZ    R0,$            ; 2*2
000D 22               24                     RET                     ; 2     ;1+4+2=7
                      25                     
                      26                     END
A51 MACRO ASSEMBLER  DELAY1MS                                                             11/06/2008 01:10:39 PAGE     2

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


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

DELAY1MS . . . . .  N NUMB   -----       
ES51 . . . . . . .  C SEG    000EH       REL=UNIT
ES51_DELAY1MS. . .  C ADDR   0000H   R   SEG=ES51
LOOP . . . . . . .  C ADDR   0004H   R   SEG=ES51
LOOP_NEXT. . . . .  C ADDR   0002H   R   SEG=ES51


REGISTER BANK(S) USED: 0 


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