merge DFS ELM FatFs from 0.3.2 to 0.4.x

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1158 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/dfs/filesystems/elmfat/ff.c

@@ -2774,7 +2774,7 @@ FRESULT f_forward (
 #define N_ROOTDIR	512			/* Multiple of 32 and <= 2048 */
 #define N_FATS		2			/* 1 or 2 */
 #define MAX_SECTOR	131072000UL	/* Maximum partition size */
-#define MIN_SECTOR	2000UL		/* Minimum partition size */
+#define MIN_SECTOR	512UL		/* Minimum partition size */
 
 
 FRESULT f_mkfs (

components/dfs/filesystems/elmfat/ffconf.h

@@ -127,7 +127,11 @@
 /* Number of volumes (logical drives) to be used. */
 
 
+#ifdef RT_DFS_ELM_MAX_SECTOR_SIZE
+#define _MAX_SS     RT_DFS_ELM_MAX_SECTOR_SIZE
+#else
 #define	_MAX_SS		512		/* 512, 1024, 2048 or 4096 */
+#endif
 /* Maximum sector size to be handled.
 /  Always set 512 for memory card and hard disk but a larger value may be
 /  required for floppy disk (512/1024) and optical disk (512/2048).
@@ -162,8 +166,11 @@
 /  If it is not the case, the value can also be set to 1 to improve the
 /  performance and code size. */
 
-
-#define _FS_REENTRANT	0			/* 0 or 1 */
+#ifdef RT_DFS_ELM_REENTRANT
+#define _FS_REENTRANT	RT_DFS_ELM_REENTRANT			/* 0 or 1 */
+#else
+#define _FS_REENTRANT	0
+#endif
 #define _FS_TIMEOUT		1000		/* Timeout period in unit of time ticks */
 #define	_SYNC_t			rt_mutex_t	/* O/S dependent type of sync object. e.g. HANDLE, OS_EVENT*, ID and etc.. */
 /* The _FS_REENTRANT option switches the reentrancy of the FatFs module.