testiic.lst

单片机的I2C总线开发

C51 COMPILER V7.06   TESTIIC                                                               09/23/2008 11:58:23 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE TESTIIC
OBJECT MODULE PLACED IN testiic.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE testiic.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <reg52.h>
   2          #include <intrins.h>
   3          #define uchar unsigned char
   4          
   5          sbit sda=P1^0;
   6          sbit scl=P1^1;
   7          
   8          
   9          
  10          void start ()
  11          {
  12   1              sda=1;
  13   1              _nop_();
  14   1              scl=1;
  15   1              _nop_();
  16   1              sda=0;
  17   1              _nop_();
  18   1      }
  19          
  20          void stop()
  21          {
  22   1              sda=0;
  23   1              _nop_();
  24   1              scl=1;
  25   1              _nop_();
  26   1              sda=1;
  27   1              _nop_();
  28   1      }
  29          
  30          bit send_byte(uchar date)
  31          {
  32   1              uchar i;
  33   1              bit ack;
  34   1              for(i=0;i<8;i++)
  35   1              {
  36   2      
  37   2                      if(date&0x80)
  38   2                              sda=1;
  39   2                      else
  40   2                              sda=0;
  41   2                      
  42   2      
  43   2                      _nop_();
  44   2                      scl=1;
  45   2                      _nop_();
  46   2                      _nop_();
  47   2                      _nop_();
  48   2                      date=date<<1;
  49   2                      scl=0;
  50   2      
  51   2              }
  52   1      
  53   1              _nop_();
  54   1              sda=1;
  55   1              _nop_();
C51 COMPILER V7.06   TESTIIC                                                               09/23/2008 11:58:23 PAGE 2   

  56   1              scl=1;
  57   1              _nop_();
  58   1              _nop_();
  59   1              if(sda==1)
  60   1                      ack=0;
  61   1              else
  62   1                      ack=1;
  63   1              scl=0;
  64   1              return ack;     
  65   1      }
  66          
  67          
  68          
  69          void main()
  70          {
  71   1              uchar date;
  72   1              while(1)
  73   1              {
  74   2                      start();
  75   2                      send_byte(0x88);
  76   2                      send_byte(date);
  77   2                      stop();
  78   2                      
  79   2              }
  80   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     88    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


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