ex9-1c.lst

《增强型8051单片机实用开发技术》例程代码

C51 COMPILER V8.18   EX9_1C                                                                11/30/2009 13:12:16 PAGE 1   


C51 COMPILER V8.18, COMPILATION OF MODULE EX9_1C
OBJECT MODULE PLACED IN ex9-1c.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ex9-1c.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "stc12c5a.h"                  //包含STC12C5A60S2单片机寄存器定义文件
   2          
   3          unsigned char data adc_dat _at_ 0x30;  //A/D转换结果变量
   4          
   5          void main(void)
   6          {
   7   1              unsigned long i;
   8   1              unsigned char status;
   9   1      
  10   1              ADC_CONTR|=0x80;            //开A/D转换电源,第一次使用时要打开内部模拟电源
  11   1              for (i=0;i<10000;i++);          //适当延时
  12   1              P1ASF=0x04;                                     //选择P1.2作为A/D转换通道
  13   1              ADC_CONTR=0xE2;             
  14   1              for (i=0;i<10000;i++);          //适当延时
  15   1      
  16   1              while(1)                        //循环进行A/D 转换
  17   1              {
  18   2                      ADC_CONTR|=0x08;        //启动 A/D 转换
  19   2                      status=0;
  20   2                      while(status==0)        //等待A/D转换结束
  21   2                      {
  22   3                          status=ADC_CONTR&0x10;
  23   3                      }
  24   2                      ADC_CONTR&=0xE7;        //将ADC_FLAG清0
  25   2                      adc_dat=ADC_RES;        //保存A/D转换结果
  26   2              }
  27   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    138    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)