pwm.lst

借助于ADC00808

A51 MACRO ASSEMBLER  PWM                                                                  02/16/2009 13:58:31 PAGE     1


MACRO ASSEMBLER A51 V6.12
OBJECT MODULE PLACED IN .\PWM.OBJ
ASSEMBLER INVOKED BY: d:\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                    ;定义ADC0808时钟位
  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 020040           10                     LJMP    INT_T0
                      11     
000E 758902           12     START:  MOV             TMOD,#02H               ;
0011 758CD5           13                     MOV             TH0,#f0
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                              ;启动AD转换
0022 30A6FD           21                     JNB     EOC,$                   ;等醋