adc0809.lst

通过adc0809采集电压

C51 COMPILER V7.50   ADC0809                                                               07/05/2008 14:59:23 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE ADC0809
OBJECT MODULE PLACED IN ADC0809.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ADC0809.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.H>
   2          #include "Typedef.H"
   3          #include "UserDef.H"
   4          #include "ADC0809.H"
   5          
   6          /*  端口定义 */
   7          #define P_Data  P0
   8          sbit AD0809_OTEN = P3^4;
   9          sbit AD0809_EOC = P3^2;
  10          sbit AD0809_START = P3^3;
  11          sbit AD0809_ALE = P3^5;
  12          
  13          /***************************************
  14                  初始化函数
  15          ****************************************/
  16          void AD0809_init(void)
  17                  {
  18   1              AD0809_OTEN = 0;
  19   1              AD0809_EOC = 1;
  20   1              AD0809_START = 0;
  21   1              AD0809_ALE = 0;
  22   1              }
  23          
  24          /***************************************
  25                  AD转换函数
  26                  入口参数：选择的通道ch
  27          ****************************************/
  28          INT8U AD0809(INT8U ch)
  29                  {
  30   1              INT8U adv,i;
  31   1      
  32   1              P_Data = ch;
  33   1              AD0809_ALE = 1;            //上升沿锁存A,B,C的地址，即选定通道
  34   1              AD0809_ALE = 0;
  35   1      
  36   1              AD0809_START = 1;          //上升沿清楚内部各寄存器，其下降沿的时候开始转换
  37   1              AD0809_START = 0;
  38   1      
  39   1              
  40   1              for (i=0;i<10;i++)                //等待
  41   1                      {}
  42   1      
  43   1              while (AD0809_EOC == 0)    //等待转换完成信号
  44   1                      {}
  45   1      
  46   1              P_Data = 0xFF;
  47   1              AD0809_OTEN = 1;                        //允许输出锁存器输出数据
  48   1              adv = P_Data;
  49   1              AD0809_OTEN = 0;
  50   1      
  51   1              return adv;
  52   1              }
  53          
  54          
  55          
C51 COMPILER V7.50   ADC0809                                                               07/05/2008 14:59:23 PAGE 2   

  56                  


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     38    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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