C51 COMPILER V8.02   24C02                                                                 07/09/2010 11:41:02 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE 24C02
OBJECT MODULE PLACED IN 24c02.OBJ
COMPILER INVOKED BY: D:\´¦ÀíÈí¼þ\keil\C51\BIN\C51.EXE 24c02.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /***************************************************************
   2                                                  ¡°ÌìÏéµç×Ó¡±            ÇãÇé·îÏ×
   3                                                                  www.txmcu.com
   4                                                                  www.txmcu.cn
   5          *****************************************************************
   6          ³ÌÐò¹¦ÄÜ£º  ÏòIIC×ÜÏßÆ÷¼þ24c02EEPROMÖеØַΪ3µÄ´æ´¢µ¥ÔªÖÐдÈëÊý¾Ý34
   7                                  ²¢½«Æä¶Á³ö£¬ÏÔʾÓÚÊýÂë¹ÜÉÏ¡£
   8                                  Ö÷ҪΪÁËÁ·Ï°IIC×ÜÏßµÄÇý¶¯³ÌÐòÒÔ¼°24C02µÄ²Ù×÷·½·¨¡£
   9          ***************************************************************/
  10          //ÊÔÑéAT24C02EEPROMоƬ³ÌÐò
  11          #include<reg51.h>
  12          #include <intrins.h>
  13          #define uint unsigned int
  14          #define uchar unsigned char
  15          sbit sda=P2^0;                          //IO¿Ú¶¨Òå
  16          sbit scl=P2^1;
  17          sbit dula=P2^6;
  18          sbit wela=P2^7;
  19          
  20          void nop()
  21          {
  22   1              _nop_();
  23   1              _nop_();
  24   1      }
  25          /////////24C02¶ÁдÇý¶¯³ÌÐò////////////////////
  26          void delay1(unsigned int m)
  27          {       unsigned int n;
  28   1              for(n=0;n<m;n++);
  29   1      }
  30          
  31          void init()  //24c02³õʼ»¯×Ó³ÌÐò
  32          {
  33   1              scl=1;
  34   1              nop();
  35   1              sda=1;
  36   1              nop();
  37   1      }
  38          
  39          void start()        //Æô¶¯I2C×ÜÏß
  40          {
  41   1              sda=1;
  42   1              nop();
  43   1              scl=1;
  44   1              nop();
  45   1              sda=0;
  46   1              nop();
  47   1              scl=0;
  48   1              nop();
  49   1      }
  50          
  51          void stop()         //Í£Ö¹I2C×ÜÏß
  52          {
  53   1              sda=0;
  54   1              nop();
  55   1              scl=1;
C51 COMPILER V8.02   24C02                                                                 07/09/2010 11:41:02 PAGE 2   

  56   1              nop();
  57   1              sda=1;
  58   1              nop();
  59   1      }
  60          
  61          void writebyte(unsigned char j)  //дһ¸ö×Ö½Ú
  62          {
  63   1              unsigned char i,temp;
  64   1              temp=j;
  65   1              for (i=0;i<8;i++)
  66   1         {
  67   2                 temp=temp<<1;
  68   2                 scl=0;
  69   2                 nop();
  70   2                 sda=CY;              //temp×óÒÆʱ£¬ÒƳöµÄÖµ·ÅÈëÁËCYÖÐ
  71   2                 nop();
  72   2                 scl=1;               //´ýsdaÏßÉϵÄÊý¾ÝÎȶ¨ºó£¬½«sclÀ­¸ß
  73   2                 nop();
  74   2         }
  75   1         scl=0;
  76   1         nop();
  77   1         sda=1;
  78   1         nop();
  79   1      }
  80          
  81          unsigned char readbyte()   //¶ÁÒ»¸ö×Ö½Ú
  82          {
  83   1         unsigned char i,j,k=0;
  84   1         scl=0; nop(); sda=1;
  85   1         for (i=0;i<8;i++)
  86   1         {  
  87   2                      nop(); scl=1; nop();
  88   2              if(sda==1) 
  89   2                      j=1;
  90   2              else
  91   2                      j=0;
  92   2              k=(k<<1)|j;
  93   2                      scl=0;
  94   2              }
  95   1              nop();
  96   1              return(k);
  97   1      }
  98          
  99          void clock()         //I2C×ÜÏßʱÖÓ
 100          {
 101   1         unsigned char i=0;
 102   1         scl=1;
 103   1         nop();
 104   1         while((sda==1)&&(i<255))
 105   1                i++;
 106   1         scl=0;
 107   1         nop();
 108   1      }
 109          
 110          ////////´Ó24c02µÄµØÖ·addressÖжÁÈ¡Ò»¸ö×Ö½ÚÊý¾Ý/////
 111          unsigned char read24c02(unsigned char address)
 112          {
 113   1         unsigned char i;
 114   1         start();
 115   1         writebyte(0xa0);
 116   1         clock();
 117   1         writebyte(address);
C51 COMPILER V8.02   24C02                                                                 07/09/2010 11:41:02 PAGE 3   

 118   1         clock();
 119   1         start();
 120   1         writebyte(0xa1);
 121   1         clock();
 122   1         i=readbyte();
 123   1         stop();
 124   1         delay1(100);
 125   1         return(i);
 126   1      }
 127          
 128          //////Ïò24c02µÄaddressµØÖ·ÖÐдÈëÒ»×Ö½ÚÊý¾Ýinfo/////
 129          void write24c02(unsigned char address,unsigned char info)
 130          {
 131   1         start();
 132   1         writebyte(0xa0);
 133   1         clock();
 134   1         writebyte(address);
 135   1         clock();
 136   1         writebyte(info);
 137   1         clock();
 138   1         stop();
 139   1         delay1(5000); //Õâ¸öÑÓʱһ¶¨Òª×ã¹»³¤£¬·ñÔò»á³ö´í¡£ÒòΪ24c02ÔÚ´ÓsdaÉÏÈ¡µÃÊý¾Ýºó£¬»¹ÐèÒªÒ»¶¨Ê±¼äµÄÉÕ¼¹ý³
             -Ì¡£
 140   1      }
 141          
 142          void main()
 143          {
 144   1              init();        //³õʼ»¯24C02
 145   1              write24c02(0,0xaa);//Ïò24c02ÖеĵØַΪ3µÄ´æ´¢µ¥ÔªÐ´ÈëÊ®½øÖÆÊý×Ö34
 146   1              P1=read24c02(0);//ÿ´ÎÖØпª»úʱ£¬¶Á³ö±£´æµÄÊý¾Ý¸³ÓÚnum
 147   1              while(1);
 148   1      }
 149          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    251    ----
   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)