A51 MACRO ASSEMBLER  PWM                                                                  08/03/2006 11:16:36 PAGE     1


MACRO ASSEMBLER A51 V8.00
OBJECT MODULE PLACED IN PWM.OBJ
ASSEMBLER INVOKED BY: e:\Program Files\Keil\C51\BIN\A51.EXE PWM.asm SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

  0035                 1     ADC             EQU             35H
  00A4                 2     CLOCK   BIT             P2.4                    ;定義ADC0808時鐘位
  00A5                 3     ST              BIT     P2.5
  00A6                 4     EOC     BIT     P2.6
  00A7                 5     OE              BIT     P2.7
  00B7                 6     PWM             BIT             P3.7
0000                   7                     ORG     00H
0000 800C              8                     SJMP    START
000B                   9                     ORG             0BH
000B 02003E           10                     LJMP    INT_T0
                      11     
000E 758902           12     START:  MOV             TMOD,#02H
0011 758C14           13                     MOV             TH0,#20
0014 758A00           14                     MOV             TL0,#00H
0017 75A882           15                     MOV             IE,#82H
001A D28C             16                     SETB    TR0
                      17     
001C C2A5             18     WAIT:   CLR     ST                              
001E D2A5             19                     SETB    ST
0020 C2A5             20                     CLR     ST                              ;啟動AD轉換
0022 30A6FD           21                     JNB     EOC,$                   ;等待轉換結束
0025 D2A7             22                     SETB    OE 
0027 859035           23                     MOV     ADC,P1                  ;讀取AD轉換結果
002A C2A7             24                     CLR     OE
002C D2B7             25                     SETB    PWM             
002E E535             26                     MOV     A,ADC
0030 120041           27                     LCALL   DELAY
0033 C2B7             28                     CLR             PWM
0035 74FF             29                     MOV             A,#255
0037 9535             30                     SUBB            A,ADC
0039 120041           31                     LCALL   DELAY
003C 80DE             32                     SJMP    WAIT
                      33     
003E B2A4             34     INT_T0: CPL             CLOCK                   ;提供ADC0808時鐘信號
0040 32               35                     RETI
                      36     
0041 7E01             37     DELAY:  MOV             R6,#1
0043 DEFE             38     D1:             DJNZ    R6,D1
0045 D5E0FB           39                     DJNZ    ACC,D1
0048 22               40                     RET
                      41     
                      42                     END
A51 MACRO ASSEMBLER  PWM                                                                  08/03/2006 11:16:36 PAGE     2

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


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

ACC. . . . . . . .  D ADDR   00E0H   A   
ADC. . . . . . . .  N NUMB   0035H   A   
CLOCK. . . . . . .  B ADDR   00A0H.4 A   
D1 . . . . . . . .  C ADDR   0043H   A   
DELAY. . . . . . .  C ADDR   0041H   A   
EOC. . . . . . . .  B ADDR   00A0H.6 A   
IE . . . . . . . .  D ADDR   00A8H   A   
INT_T0 . . . . . .  C ADDR   003EH   A   
OE . . . . . . . .  B ADDR   00A0H.7 A   
P1 . . . . . . . .  D ADDR   0090H   A   
P2 . . . . . . . .  D ADDR   00A0H   A   
P3 . . . . . . . .  D ADDR   00B0H   A   
PWM. . . . . . . .  B ADDR   00B0H.7 A   
ST . . . . . . . .  B ADDR   00A0H.5 A   
START. . . . . . .  C ADDR   000EH   A   
TH0. . . . . . . .  D ADDR   008CH   A   
TL0. . . . . . . .  D ADDR   008AH   A   
TMOD . . . . . . .  D ADDR   0089H   A   
TR0. . . . . . . .  B ADDR   0088H.4 A   
WAIT . . . . . . .  C ADDR   001CH   A   


REGISTER BANK(S) USED: 0 

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