dosfat.h

一种文件系统的结构

#ifndef	_DOSFAT_
#define _DOSFAT_
//-------------------------------------------------------------------------------
extern	xdata   U8  gc_ClusBufValidSize;
extern	xdata   U8  gc_ClusBufValidPoint;
extern	xdata 	U32	gdw_ClusterBuffer[];//xyq040811
extern	xdata 	U32 gdw_FreeClusterNum[];
extern	bit     gbt_FindFlag;
extern	xdata 	U32 gdw_TotalFreeClusCounter;
extern	xdata 	U32 gdw_TotalFreeClusNumber;


//-------------------------------------------------------------------------------
extern	U32 DOS_ClusterLogicAddr(U32 tdw_Cluster);
extern	U8 DOS_ConnectFATChain(U32 tdw_HeadCluster, U32 tdw_TailCluster);
extern	U8 DOS_Copy_FATtoFAT(U32 tdw_HeadCluster, U32 tdw_TailCluster, bit tbt_fat1tofat2);
extern	U32 DOS_GetAFreeCluster(void);
extern	U32 DOS_GetNextCluster(U32 tdw_CurrentCLuster, U32 tdw_ClusterNumber);
extern	U8 DOS_MarkFATUpdate(U32 tdw_MarkFATAddr,U8 tc_Value);
extern	U8 DOS_SearchFreeCluster(U8 tc_SearchMode);
//-------------------------------------------------------------------------------
#endif