at24c02.lst

使用单片机keilc51编程,每次上电时,从24C02中读取数据,让二极管灯点亮.

C51 COMPILER V8.05a   AT24C02                                                              04/10/2009 17:15:28 PAGE 1   


C51 COMPILER V8.05a, COMPILATION OF MODULE AT24C02
OBJECT MODULE PLACED IN AT24C02.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE AT24C02.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <REGX51.H>
   2          #define uchar unsigned char 
   3          sbit SDA=P2^7;
   4          sbit SCL=P3^6;  
   5          void delay1(uchar x);
   6          void delay()
   7          {;;}
   8          void start()
   9          {
  10   1        SDA=1;
  11   1        delay();
  12   1        SCL=1;
  13   1        delay();
  14   1        SDA=0;
  15   1        delay();
  16   1      }
  17          void stop()
  18          {
  19   1        SDA=0;
  20   1        delay();
  21   1        SCL=1;
  22   1        delay();
  23   1        SDA=1;
  24   1        delay();
  25   1        SCL=0;
  26   1        delay();
  27   1      }
  28          void respons()
  29          {
  30   1         uchar i;
  31   1         SCL=1;
  32   1         delay();
  33   1         while((SDA==1)&&(i<250))i++;
  34   1         SCL=0;
  35   1         delay();
  36   1      }
  37          void write_byte(uchar date)
  38          {
  39   1        uchar i,temp;
  40   1        temp=date;
  41   1        for(i=0;i<8;i++)
  42   1        {
  43   2              temp=temp<<1;
  44   2              SCL=0;
  45   2          delay();
  46   2              SDA=CY;
  47   2              delay();
  48   2              SCL=1;
  49   2              delay();
  50   2        }
  51   1          SCL=0;
  52   1          delay();
  53   1          SDA=1;
  54   1          delay();
  55   1      }
C51 COMPILER V8.05a   AT24C02                                                              04/10/2009 17:15:28 PAGE 2   

  56          uchar read_byte()
  57          {
  58   1              uchar i,k;
  59   1              SCL=0;
  60   1              delay();
  61   1              SDA=1;
  62   1              delay();
  63   1              for(i=0;i<8;i++)
  64   1              {
  65   2                SCL=1;
  66   2                delay();
  67   2                k=(k<<1)|SDA;
  68   2                SCL=0;
  69   2                delay();
  70   2               }
  71   1              return(k);
  72   1      }
  73           void write_add(uchar address,uchar date)
  74          {
  75   1        start();
  76   1        write_byte(0xa0);
  77   1        respons();
  78   1        write_byte(address);
  79   1        respons();
  80   1        write_byte(date);
  81   1        respons();
  82   1        stop();
  83   1      } 
  84           uchar read_add(uchar address)
  85          {
  86   1        uchar date;
  87   1        start();
  88   1        write_byte(0xa0);
  89   1        respons();
  90   1        write_byte(address);
  91   1        respons();
  92   1        start();
  93   1        write_byte(0xa1);
  94   1        respons();
  95   1        date=read_byte();
  96   1        stop();
  97   1        return date;
  98   1      }
  99           void init()
 100          {
 101   1        SDA=1;
 102   1        delay();    
 103   1        SCL=1;
 104   1        delay();
 105   1      } 
 106          void main()
 107          {
 108   1       init();
 109   1       write_add(0x02,0xaa);
 110   1       delay1(100);
 111   1       P0=read_add(0x02);
 112   1       P3_7=0;
 113   1       while(1);
 114   1      }
 115          void delay1(uchar x)
 116          {
 117   1       uchar i,j;
C51 COMPILER V8.05a   AT24C02                                                              04/10/2009 17:15:28 PAGE 3   

 118   1       for(i=x;i>0;i--)
 119   1        for(j=200;j>0;j--);
 120   1      }
 121          
 122          
 123          
 124          
 125          
 126          
 127          
 128          


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


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