fat32nextcluster.lst

用C51单片机实现的MP3播放器的c代码程序。

C51 COMPILER V6.12  FAT32NEXTCLUSTER                                                       05/03/2005 11:51:05 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE FAT32NEXTCLUSTER
OBJECT MODULE PLACED IN .\FAT32NEXTCLUSTER.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE .\FAT32NEXTCLUSTER.C LARGE BROWSE DEBUG OBJECTEXTEND

stmt 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      		IDEReadSector(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        =    251    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----      10
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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