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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-08-03 17:45:20 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-08-03 17:45:20 +0000 |
| commit | a3faf4085e5b1cde0c452ac6e9125f98fd6614f3 (patch) | |
| tree | a2d80ca0547993f06df10e52148be66fb105acb4 /nuttx/fs/fat/fs_fat32.h | |
| parent | ad8509bd41d1ac2136d79632b2e4ac1d6aba4393 (diff) | |
| download | px4-nuttx-a3faf4085e5b1cde0c452ac6e9125f98fd6614f3.tar.gz px4-nuttx-a3faf4085e5b1cde0c452ac6e9125f98fd6614f3.tar.bz2 px4-nuttx-a3faf4085e5b1cde0c452ac6e9125f98fd6614f3.zip | |
fleshing out mkfatfs logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@801 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/fs/fat/fs_fat32.h')
| -rw-r--r-- | nuttx/fs/fat/fs_fat32.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/nuttx/fs/fat/fs_fat32.h b/nuttx/fs/fat/fs_fat32.h index cedbd9c84..3dfc0aae2 100644 --- a/nuttx/fs/fat/fs_fat32.h +++ b/nuttx/fs/fat/fs_fat32.h @@ -136,7 +136,8 @@ #define DIR_WRTDATE 24 /* 2@24: Date of last write */ #define DIR_FSTCLUSTLO 26 /* 2@26: LS first cluster number */ #define DIR_FILESIZE 28 /* 4@28: File size in bytes */ -#define DIR_SIZE 32 +#define DIR_SIZE 32 /* The size of one directory entry */ +#define DIR_SHIFT 5 /* log2 of DIR_SIZE */ /* First byte of the directory name has special meanings: */ @@ -178,15 +179,22 @@ * These offset describe the FSINFO sector */ -#define FSI_LEADSIG 0 /* 4@0: 0x41615252 */ +#define FSI_LEADSIG 0 /* 4@0: 0x41615252 = "RRaA" */ /* 480@4: Reserved (zero) */ -#define FSI_STRUCTSIG 484 /* 4@484: 0x61417272 */ +#define FSI_STRUCTSIG 484 /* 4@484: 0x61417272 = "rrAa" */ #define FSI_FREECOUNT 488 /* 4@488: Last free cluster count on volume */ #define FSI_NXTFREE 492 /* 4@492: Cluster number of 1st free cluster */ /* 12@496: Reserved (zero) */ #define FSI_TRAILSIG 508 /* 4@508: 0xaa550000 */ /**************************************************************************** + * FAT values + */ + +#define FAT_EOF 0x0ffffff8 +#define FAT_BAD 0x0ffffff7 + +/**************************************************************************** * Access to data in raw sector data */ #define UBYTE_VAL(p,o) (((ubyte*)(p))[o]) |