ad7416.lst

温度传感器AD7416C程序（能帮你了解I2C原理

C51 COMPILER V7.10   AD7416                                                                11/03/2004 15:40:41 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE AD7416
OBJECT MODULE PLACED IN ad7416.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ad7416.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg51.h>
   2          #include <intrins.h>
   3          #include <stdio.h>
   4          
   5          sbit SDA =P1^0;
   6          sbit SCL =P1^1;
   7          sbit OTI =P1^2;
   8          sbit AD0 =P0^0;
   9          sbit AD1 =P0^1; 
  10          sbit AD2 =P0^2;
  11          
  12          unsigned char Command;
  13          
  14          
  15          void START()
  16          {
  17   1              SCL=1;
  18   1              SDA=1;
  19   1              _nop_();
  20   1              _nop_();
  21   1              _nop_();
  22   1              _nop_();
  23   1              SDA=0;
  24   1              _nop_();
  25   1              _nop_();
  26   1              _nop_();
  27   1              _nop_();
  28   1              SCL=0;
  29   1      
  30   1      }
  31          
  32          void STOP()
  33          {
  34   1              SDA=0;
  35   1              SCL=1;
  36   1              _nop_();
  37   1              _nop_();
  38   1              _nop_();
  39   1              _nop_();
  40   1              _nop_();
  41   1              SDA=1;  
  42   1      }
  43          
  44          void WRCOM(unsigned char com)
  45          {
  46   1              unsigned char i;
  47   1              Command=com;
  48   1              for(i=0;i<8;i++)
  49   1              {
  50   2                      SCL=0;
  51   2                      if(Command & 0x80 )
  52   2                              SDA=1;
  53   2                      else SDA=0;
  54   2                      _nop_();
  55   2                      _nop_();
C51 COMPILER V7.10   AD7416                                                                11/03/2004 15:40:41 PAGE 2   

  56   2                      Command=Command<<1;
  57   2                      _nop_();
  58   2                      SCL=1;
  59   2                      _nop_();
  60   2                      _nop_();
  61   2                      _nop_();
  62   2                      _nop_();
  63   2                      _nop_();
  64   2              }
  65   1              SCL=0;
  66   1              _nop_();
  67   1              _nop_();
  68   1              _nop_();
  69   1              _nop_();
  70   1              _nop_();
  71   1              SDA=1;
  72   1      
  73   1      }
  74          
  75          char RDCOM()
  76          {
  77   1              unsigned char i;
  78   1              char temp;
  79   1              for(i=0;i<8;i++)
  80   1              {
  81   2                      SCL=0;
  82   2                      _nop_();
  83   2                      _nop_();
  84   2                      _nop_();
  85   2                      _nop_();
  86   2                      _nop_();
  87   2                      SCL=1;
  88   2                      _nop_();
  89   2                      _nop_();
  90   2                      temp=temp<<1;
  91   2                      if(SDA==1) temp=temp | 0x01;
  92   2      
  93   2              }
  94   1              SCL=0;
  95   1              _nop_();
  96   1              _nop_();
  97   1              SDA=1;
  98   1              return(temp);
  99   1      
 100   1      }
 101          
 102          main()
 103          {   
 104   1              unsigned char com;
 105   1              char dat;
 106   1              TMOD=0x20|TMOD;
 107   1          TL1=0xfd;
 108   1          TH1=0xfd;
 109   1          TR1=1;
 110   1          SCON=0x50;
 111   1              TI=1;
 112   1              P0=0XFF;
 113   1              puts("the temp is:\r\n");
 114   1              com=0x9E;
 115   1              START();
 116   1              WRCOM(com);
 117   1              com=0x01;
C51 COMPILER V7.10   AD7416                                                                11/03/2004 15:40:41 PAGE 3   

 118   1              WRCOM(com);
 119   1              com=0x18;
 120   1              WRCOM(com);
 121   1              STOP();
 122   1              START();
 123   1              com=0x9e;
 124   1              WRCOM(com);
 125   1              com=0x03;
 126   1              WRCOM(com);
 127   1              com=0x30;
 128   1              WRCOM(com);
 129   1              STOP();
 130   1              START();
 131   1              com=0x9e;
 132   1              WRCOM(com);
 133   1              com=0x02;
 134   1              WRCOM(com);
 135   1              com=0x0a;
 136   1              WRCOM(com);
 137   1              STOP();
 138   1              START();
 139   1              com=0x9e;
 140   1              WRCOM(com);
 141   1              STOP();
 142   1              START();
 143   1              com=0x00;
 144   1              WRCOM(com);
 145   1              STOP();
 146   1              START();
 147   1              com=0x9f;
 148   1              WRCOM(com);
 149   1              while(1)
 150   1              {
 151   2              STOP();
 152   2              START();
 153   2              dat=RDCOM();
 154   2              STOP();
 155   2              printf("%d",dat);
 156   2              }
 157   1              
 158   1      
 159   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    235    ----
   CONSTANT SIZE    =     18    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      1       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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