fat32nextcluster.lst

基于c51的SD驱动程序,在FAT32文件系统中.

C51 COMPILER V7.50   FAT32NEXTCLUSTER                                                      07/13/2005 11:18:06 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE FAT32NEXTCLUSTER
OBJECT MODULE PLACED IN FAT32NEXTCLUSTER.OBJ
COMPILER INVOKED BY: e:\Keil\C51\BIN\C51.EXE FAT32NEXTCLUSTER.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #ifndef _FAT32_DEFINE
   2           #include "FAT32.c"
   3          #endif
   4          
   5          DWORD FAT32NextCluster(DWORD CurrentCluster);
   6          
   7          DWORD FAT32NextCluster(DWORD CurrentCluster)
   8          {
   9   1              register BYTE Offset,i;
  10   1              xdata DWORD Sector;
  11   1      
  12   1              Sector=CurrentCluster>>7;                                               //等价于CurrentCluster/128
  13   1              Offset=(BYTE)(CurrentCluster&0x0000007f);               //等价于CurrentCluster%128
  14   1              if (Sector!=FAT.Sector)
  15   1              {
  16   2                      ReadDiskSector(FAT32.FATSec + Sector);
  17   2                      for(i=0;i<128;i++)
  18   2                              FAT.FAT[i]=((DWORD *)&DiskBuffer)[i];
  19   2                      FAT.Sector=Sector;
  20   2              }
  21   1              return(MEMSwap32(FAT.FAT[Offset]));
  22   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    201    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----       4
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      2       6
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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