24c02.lst

51单片机C语言程序——I2C存储器24C16

C51 COMPILER V6.23a  24C02                                                                 08/23/2005 15:28:25 PAGE 1   


C51 COMPILER V6.23a, COMPILATION OF MODULE 24C02
OBJECT MODULE PLACED IN 24c02.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\c51.exe 24c02.c DB OE SMALL ROM(LARGE) 

stmt level    source

   1          #include <reg51.h>
   2          
   3          // 对24C02的读、写
   4          // extern void DelayMs(unsigned int);
   5          // extern void Read24c02(unsigned char *RamAddress,unsigned char RomAddress,unsigned char bytes);
   6          // extern void Write24c02(unsigned char *RamAddress,unsigned char RomAddress,unsigned char bytes);
   7          
   8          /***************************************************************************/
   9          #define WriteDeviceAddress 0xa0
  10          #define ReadDviceAddress 0xa1
  11          
  12          /***************************************************************************/
  13          sbit SCL=P1^0;
  14          sbit SDA=P1^1;
  15          sbit DOG=P3^7;
  16          
  17          /***************************************************************************/
  18          void DelayMs(unsigned int number) 
  19          {
  20   1      unsigned char temp;
  21   1      for(;number!=0;number--,DOG=!DOG) 
  22   1              {
  23   2              for(temp=112;temp!=0;temp--);
  24   2              }
  25   1      }
  26          
  27          /***************************************************************************/
  28          void Start() 
  29          {
  30   1       SDA=1;
  31   1       SCL=1;
  32   1       SDA=0;
  33   1       SCL=0;
  34   1      }
  35          
  36          /***************************************************************************/
  37          void Stop() 
  38          {
  39   1       SCL=0;
  40   1       SDA=0;
  41   1       SCL=1;
  42   1       SDA=1;
  43   1      }
  44          
  45          /***************************************************************************/
  46          void Ack() 
  47          {
  48   1       SDA=0;
  49   1       SCL=1;
  50   1       SCL=0;
  51   1       SDA=1;
  52   1      }
  53          
  54          /***************************************************************************/
  55          void NoAck() 
C51 COMPILER V6.23a  24C02                                                                 08/23/2005 15:28:25 PAGE 2   

  56          {
  57   1       SDA=1;
  58   1       SCL=1;
  59   1       SCL=0;
  60   1      }
  61          
  62          /***************************************************************************/
  63          bit TestAck() 
  64          {
  65   1       bit ErrorBit;
  66   1       SDA=1;
  67   1       SCL=1;
  68   1       ErrorBit=SDA;
  69   1       SCL=0;
  70   1       return(ErrorBit);
  71   1      }
  72          
  73          /***************************************************************************/
  74          bit Write8Bit(unsigned char input) 
  75          {
  76   1       unsigned char temp;
  77   1       for(temp=8;temp!=0;temp--) 
  78   1              {
  79   2              SDA=(bit)(input&0x80);
  80   2              SCL=1;
  81   2              SCL=0;
  82   2              input=input<<1;
  83   2              }
  84   1      }
*** WARNING C173 IN LINE 84 OF 24C02.C: missing return-expression
  85          
  86          /***************************************************************************/
  87          void Write24c02(unsigned char *Wdata,unsigned char RomAddress,unsigned char number) 
  88          {
  89   1       Start();
  90   1       Write8Bit(WriteDeviceAddress);
  91   1       TestAck();
  92   1       Write8Bit(RomAddress);
  93   1       TestAck();
  94   1       for(;number!=0;number--) 
  95   1              {
  96   2              Write8Bit(*Wdata);
  97   2              TestAck();
  98   2              Wdata++;
  99   2              }
 100   1       Stop();
 101   1       DelayMs(10);
 102   1      }
 103          
 104          /***************************************************************************/
 105          unsigned char Read8Bit() 
 106          {
 107   1       unsigned char temp,rbyte=0;
 108   1       for(temp=8;temp!=0;temp--) 
 109   1              {
 110   2               SCL=1;
 111   2               rbyte=rbyte<<1;
 112   2               rbyte=rbyte|((unsigned char)(SDA));
 113   2               SCL=0;
 114   2              }
 115   1       return(rbyte);
 116   1      }
C51 COMPILER V6.23a  24C02                                                                 08/23/2005 15:28:25 PAGE 3   

 117          
 118          /***************************************************************************/
 119          void Read24c02(unsigned char *RamAddress,unsigned char RomAddress,unsigned char bytes) 
 120          {
 121   1       unsigned char temp,rbyte;
 122   1       Start();
 123   1       Write8Bit(WriteDeviceAddress);
 124   1       TestAck();
 125   1       Write8Bit(RomAddress);
 126   1       TestAck();
 127   1       Start();
 128   1       Write8Bit(ReadDviceAddress);
 129   1       TestAck();
 130   1       while(bytes!=1) 
 131   1              {
 132   2              *RamAddress=Read8Bit();
 133   2              Ack();
 134   2              RamAddress++;
 135   2              bytes--;
 136   2              }
 137   1       *RamAddress=Read8Bit();
 138   1       NoAck();
 139   1       Stop();
 140   1      }
*** WARNING C280 IN LINE 121 OF 24C02.C: 'temp': unreferenced local variable
*** WARNING C280 IN LINE 121 OF 24C02.C: 'rbyte': unreferenced local variable
 141          /**************************************/
 142          void main()
 143          {
 144   1      unsigned char a[8]="01234567",b[8];
 145   1      Write24c02(a,0,8);
 146   1      Read24c02(b,0,8);
 147   1      while(1);
 148   1      }
 149          /***************************************************************************/
 150           
 151          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    266    ----
   CONSTANT SIZE    =      8    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      28
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  3 WARNING(S),  0 ERROR(S)