#ifndef _FAT_DEFINE
 #include "FAT.c"
#endif

BYTE FATChangeDirectory(CHAR *DirName);

BYTE FATChangeDirectory(CHAR *DirName)
{
	register DWORD cluster;
	register BYTE i;

	i=FATFindDIREntry(DirName);
	printf("find:%bx\n",i);
	if (i<16&&(sDIR[i].Attr&FAT_ATTR_DIRECTORY))								//找到目錄入口
	{
		cluster=(MEMSwap16(sDIR[i].FstClusHI)<<16)|MEMSwap16(sDIR[i].FstClusLO);
		if (cluster) FAT.CurrentDirectory=cluster; else FAT.CurrentDirectory=FAT.RootClus;
		return(0);
	}
	else if (!(sDIR[i].Attr&FAT_ATTR_DIRECTORY)) return(FAT_ERR_NOT_DIR); 	//目錄項不是一個目錄入口
	else return(FAT_ERR_DIR_NOT_FOUND);										//目錄入口為找到
}