A51 MACRO ASSEMBLER  禵蔩計數芲的觃用__二__                                               05/03/2008 08:03:45 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN 定時計數器的應用（二）.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE 定時計數器的應用（二）.ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0100                   1     ORG   0100H
0100 758900            2     MOV  TMOD, #00H   ;設置T1為工作方式0
0103 758DF0            3     MOV  TH1, #0F0H   ;設置T1的計數初值X
0106 758B0C            4     MOV  TL1, #0CH
0109 75A800            5     MOV  IE, #00H     ;禁止中斷
010C D28E              6     SETB TR1           ;啟動T1
010E 108F02            7     LP1: JBC  TF1,LP2       ;查詢計數是否溢出
0111 210E              8     AJMP LP1           ;沒有溢出，繼續查詢
0113 758DF0            9     LP2: MOV  TH1, #0F0H   ;溢出重新置計數初值X
0116 758B0C           10     MOV  TL1, #0CH
                      11     ;CLR  TF1           ;計數溢出標志清0
0119 B290             12     CPL  P1.0          ;輸出取反
011B 80F1             13     SJMP LP1           ;重復循環
                      14     END
                             
A51 MACRO ASSEMBLER  禵蔩計數芲的觃用__二__                                               05/03/2008 08:03:45 PAGE     2

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


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

IE . . . . . . . .  D ADDR   00A8H   A   
LP1. . . . . . . .  C ADDR   010EH   A   
LP2. . . . . . . .  C ADDR   0113H   A   
P1 . . . . . . . .  D ADDR   0090H   A   
TF1. . . . . . . .  B ADDR   0088H.7 A   
TH1. . . . . . . .  D ADDR   008DH   A   
TL1. . . . . . . .  D ADDR   008BH   A   
TMOD . . . . . . .  D ADDR   0089H   A   
TR1. . . . . . . .  B ADDR   0088H.6 A   


REGISTER BANK(S) USED: 0 

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