at24c02.lst

在STC51上开发的一个电子称程序 KEILUV3环境开发

C51 COMPILER V8.02   AT24C02                                                               03/31/2008 17:24:47 PAGE 1   


C51 COMPILER V8.02, 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 "hardware.h"
   2          
   3          /***************************************************************************/
   4          #define WriteDeviceAddress 0xa0
   5          #define ReadDviceAddress 0xa1
   6          
   7          /***************************************************************************/
   8          void delaysmMs(unsigned int number)
   9          {
  10   1              unsigned char temp;
  11   1              for(;number!=0;number--) 
  12   1              {
  13   2               for(temp=112;temp!=0;temp--); 
  14   2              }
  15   1      }
  16          
  17          /***************************************************************************/
  18          void Start() 
  19          {
  20   1              I2CSDA=1;
  21   1              I2CSCL=1;
  22   1              I2CSDA=0;
  23   1              I2CSCL=0;
  24   1      }
  25          
  26          /***************************************************************************/
  27          void Stop()
  28           {
  29   1              I2CSCL=0;
  30   1              I2CSDA=0;
  31   1              I2CSCL=1;
  32   1              I2CSDA=1;
  33   1      }
  34          
  35          /***************************************************************************/
  36          void Ack() 
  37          {
  38   1              I2CSDA=0;
  39   1              I2CSCL=1;
  40   1              I2CSCL=0;
  41   1              I2CSDA=1;
  42   1      }
  43          
  44          /***************************************************************************/
  45          void NoAck()
  46           {
  47   1              I2CSDA=1;
  48   1              I2CSCL=1;
  49   1              I2CSCL=0;
  50   1      }
  51          
  52          /***************************************************************************/
  53          bit TestAck()
  54           {
  55   1              bit ErrorBit;
C51 COMPILER V8.02   AT24C02                                                               03/31/2008 17:24:47 PAGE 2   

  56   1              I2CSDA=1;
  57   1              I2CSCL=1;
  58   1              ErrorBit=I2CSDA;
  59   1              I2CSCL=0;
  60   1              return(ErrorBit);
  61   1      }
  62          
  63          /***************************************************************************/
  64          void Write8Bit(unsigned char input) 
  65          {
  66   1              unsigned char temp;
  67   1              for(temp=8;temp!=0;temp--) 
  68   1          {
  69   2                      I2CSDA=(bit)(input&0x80);
  70   2                      I2CSCL=1;
  71   2                      I2CSCL=0;
  72   2                      input=input<<1;
  73   2              }
  74   1      }
  75          
  76          
  77          /**************************写入数据的指针，地址，写入数据的数量****************************************/
  78          void Write24c02(unsigned char *Wdata,unsigned char RomAddress,unsigned char number) 
  79          {
  80   1              Start();
  81   1              Write8Bit(WriteDeviceAddress);
  82   1              TestAck();
  83   1              Write8Bit(RomAddress);
  84   1              TestAck();
  85   1              for(;number!=0;number--) 
  86   1         {
  87   2                      Write8Bit(*Wdata);
  88   2                      TestAck();
  89   2                      Wdata++;
  90   2              }
  91   1              Stop();
  92   1              delaysmMs(10);
  93   1      }
  94          
  95          /***************************************************************************/
  96          unsigned char Read8Bit() 
  97          {
  98   1              unsigned char temp,rbyte=0;
  99   1              for(temp=8;temp!=0;temp--) 
 100   1          {
 101   2                      I2CSCL=1;
 102   2                      rbyte=rbyte<<1;
 103   2                      rbyte=rbyte|((unsigned char)(I2CSDA));
 104   2                      I2CSCL=0;
 105   2              }
 106   1              return(rbyte);
 107   1      }
 108          
 109          /**************************读出数据的指针，地址，读出数据的数量********************************/
 110          void Read24c02(unsigned char *RamAddress,unsigned char RomAddress,unsigned char bytes) 
 111          {
 112   1          Start();
 113   1              Write8Bit(WriteDeviceAddress);
 114   1              TestAck();
 115   1              Write8Bit(RomAddress);
 116   1              TestAck();
 117   1              Start();
C51 COMPILER V8.02   AT24C02                                                               03/31/2008 17:24:47 PAGE 3   

 118   1              Write8Bit(ReadDviceAddress);
 119   1              TestAck();
 120   1              while(bytes!=1)
 121   1          {
 122   2               *RamAddress=Read8Bit();
 123   2               Ack();
 124   2               RamAddress++;
 125   2               bytes--;
 126   2              }
 127   1              *RamAddress=Read8Bit();
 128   1              NoAck();
 129   1              Stop();
 130   1      }
 131          
 132          
 133          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    217    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      10
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


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