fat32changedirectory.lst

用C51单片机实现的MP3播放器的c代码程序。

C51 COMPILER V6.12  FAT32CHANGEDIRECTORY                                                   05/03/2005 11:51:03 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE FAT32CHANGEDIRECTORY
OBJECT MODULE PLACED IN .\FAT32CHANGEDIRECTORY.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE .\FAT32CHANGEDIRECTORY.C LARGE BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #ifndef _FAT32_DEFINE
   2           #include "FAT32.c"
   3          #endif
   4          
   5          BYTE FAT32ChangeDirectory(CHAR *DirName);
   6          
   7          BYTE FAT32ChangeDirectory(CHAR *DirName)
   8          {
   9   1      	register DWORD cluster;
  10   1      	register BYTE i;
  11   1      
  12   1      	i=FAT32FindDIREntry(DirName);
  13   1      	if (i<16&&(sDIR[i].Attr&FAT32_ATTR_DIRECTORY))								//找到目录入口
  14   1      	{
  15   2      		cluster=(MEMSwap16(sDIR[i].FstClusHI)<<16)|MEMSwap16(sDIR[i].FstClusLO);
  16   2      		FAT32.CurrentDirectory=cluster;
  17   2      		return(0);
  18   2      	}
  19   1      	else if (!(sDIR[i].Attr&FAT32_ATTR_DIRECTORY)) return(FAT32_ERR_NOT_DIR); 	//目录项不是一个目录入口
  20   1      	else return(FAT32_ERR_DIR_NOT_FOUND);										//目录入口为找到
  21   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    170    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----       1
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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