diff options
Diffstat (limited to 'Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs')
6 files changed, 1180 insertions, 1180 deletions
diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/00readme.txt b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/00readme.txt index 0703d5925..ee8effcf4 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/00readme.txt +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/00readme.txt @@ -1,36 +1,36 @@ -Petit FatFs Module Source Files R0.01a (C)ChaN, 2010
-
-
-FILES
-
- pff.h Common include file for Petit FatFs and application module.
- pff.c Petit FatFs module.
- diskio.h Common include file for Petit FatFs and disk I/O module.
- diskio.c Skeleton of low level disk I/O module.
- integer.h Alternative type definitions for integer variables.
-
- Low level disk I/O module is not included in this archive because the Petit
- FatFs module is only a generic file system layer and not depend on any
- specific storage device. You have to provide a low level disk I/O module that
- written to control your storage device.
-
-
-
-AGREEMENTS
-
- Petit FatFs module is an open source software to implement FAT file system to
- small embedded systems. This is a free software and is opened for education,
- research and commercial developments under license policy of following trems.
-
- Copyright (C) 2010, ChaN, all right reserved.
-
- * The Petit FatFs module is a free software and there is NO WARRANTY.
- * No restriction on use. You can use, modify and redistribute it for
- personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
- * Redistributions of source code must retain the above copyright notice.
-
-
-
-REVISION HISTORY
-
- Jun 15, 2010 R0.01a First release (Branched from FatFs R0.07b)
+Petit FatFs Module Source Files R0.01a (C)ChaN, 2010 + + +FILES + + pff.h Common include file for Petit FatFs and application module. + pff.c Petit FatFs module. + diskio.h Common include file for Petit FatFs and disk I/O module. + diskio.c Skeleton of low level disk I/O module. + integer.h Alternative type definitions for integer variables. + + Low level disk I/O module is not included in this archive because the Petit + FatFs module is only a generic file system layer and not depend on any + specific storage device. You have to provide a low level disk I/O module that + written to control your storage device. + + + +AGREEMENTS + + Petit FatFs module is an open source software to implement FAT file system to + small embedded systems. This is a free software and is opened for education, + research and commercial developments under license policy of following trems. + + Copyright (C) 2010, ChaN, all right reserved. + + * The Petit FatFs module is a free software and there is NO WARRANTY. + * No restriction on use. You can use, modify and redistribute it for + personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY. + * Redistributions of source code must retain the above copyright notice. + + + +REVISION HISTORY + + Jun 15, 2010 R0.01a First release (Branched from FatFs R0.07b) diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.c b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.c index c0393dd84..47e73159f 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.c +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.c @@ -1,57 +1,57 @@ -/*-----------------------------------------------------------------------*/
-/* Low level disk I/O module skeleton for Petit FatFs (C)ChaN, 2010 */
-/*-----------------------------------------------------------------------*/
-
-#include "diskio.h"
-
-#include <string.h>
-#include <LUFA/Drivers/USB/Class/MassStorage.h>
-#include "../DataflashManager.h"
-#include "../../DiskHost.h"
-
-/*-----------------------------------------------------------------------*/
-/* Initialize Disk Drive */
-/*-----------------------------------------------------------------------*/
-
-DSTATUS disk_initialize (void)
-{
- return RES_OK;
-}
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read Partial Sector */
-/*-----------------------------------------------------------------------*/
-
-DRESULT disk_readp (
- void* dest, /* Pointer to the destination object */
- DWORD sector, /* Sector number (LBA) */
- WORD sofs, /* Offset in the sector */
- WORD count /* Byte count (bit15:destination) */
-)
-{
- DRESULT ErrorCode = RES_OK;
- uint8_t BlockTemp[512];
-
- if (USB_CurrentMode == USB_MODE_HOST)
- {
- #if defined(USB_CAN_BE_HOST)
- if (USB_HostState != HOST_STATE_Configured)
- ErrorCode = RES_NOTRDY;
- else if (MS_Host_ReadDeviceBlocks(&DiskHost_MS_Interface, 0, sector, 1, 512, BlockTemp))
- ErrorCode = RES_ERROR;
- #endif
- }
- else
- {
- #if defined(USB_CAN_BE_DEVICE)
- DataflashManager_ReadBlocks_RAM(sector, 1, BlockTemp);
- #endif
- }
-
- memcpy(dest, &BlockTemp[sofs], count);
-
- return ErrorCode;
-}
-
+/*-----------------------------------------------------------------------*/ +/* Low level disk I/O module skeleton for Petit FatFs (C)ChaN, 2010 */ +/*-----------------------------------------------------------------------*/ + +#include "diskio.h" + +#include <string.h> +#include <LUFA/Drivers/USB/Class/MassStorage.h> +#include "../DataflashManager.h" +#include "../../DiskHost.h" + +/*-----------------------------------------------------------------------*/ +/* Initialize Disk Drive */ +/*-----------------------------------------------------------------------*/ + +DSTATUS disk_initialize (void) +{ + return RES_OK; +} + + + +/*-----------------------------------------------------------------------*/ +/* Read Partial Sector */ +/*-----------------------------------------------------------------------*/ + +DRESULT disk_readp ( + void* dest, /* Pointer to the destination object */ + DWORD sector, /* Sector number (LBA) */ + WORD sofs, /* Offset in the sector */ + WORD count /* Byte count (bit15:destination) */ +) +{ + DRESULT ErrorCode = RES_OK; + uint8_t BlockTemp[512]; + + if (USB_CurrentMode == USB_MODE_HOST) + { + #if defined(USB_CAN_BE_HOST) + if (USB_HostState != HOST_STATE_Configured) + ErrorCode = RES_NOTRDY; + else if (MS_Host_ReadDeviceBlocks(&DiskHost_MS_Interface, 0, sector, 1, 512, BlockTemp)) + ErrorCode = RES_ERROR; + #endif + } + else + { + #if defined(USB_CAN_BE_DEVICE) + DataflashManager_ReadBlocks_RAM(sector, 1, BlockTemp); + #endif + } + + memcpy(dest, &BlockTemp[sofs], count); + + return ErrorCode; +} + diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.h b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.h index 7caa7f44f..4e9aa76f4 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.h +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.h @@ -1,36 +1,36 @@ -/*-----------------------------------------------------------------------
-/ PFF - Low level disk interface modlue include file (C)ChaN, 2010
-/-----------------------------------------------------------------------*/
-
-#ifndef _DISKIO
-
-#include "integer.h"
-
-
-/* Status of Disk Functions */
-typedef BYTE DSTATUS;
-
-
-/* Results of Disk Functions */
-typedef enum {
- RES_OK = 0, /* 0: Function succeeded */
- RES_ERROR, /* 1: Disk error */
- RES_STRERR, /* 2: Seream error */
- RES_NOTRDY, /* 3: Not ready */
- RES_PARERR /* 4: Invalid parameter */
-} DRESULT;
-
-
-/*---------------------------------------*/
-/* Prototypes for disk control functions */
-
-DSTATUS disk_initialize (void);
-DRESULT disk_readp (void*, DWORD, WORD, WORD);
-
-BOOL assign_drives (int argc, char *argv[]);
-
-#define STA_NOINIT 0x01 /* Drive not initialized */
-#define STA_NODISK 0x02 /* No medium in the drive */
-
-#define _DISKIO
-#endif
+/*----------------------------------------------------------------------- +/ PFF - Low level disk interface modlue include file (C)ChaN, 2010 +/-----------------------------------------------------------------------*/ + +#ifndef _DISKIO + +#include "integer.h" + + +/* Status of Disk Functions */ +typedef BYTE DSTATUS; + + +/* Results of Disk Functions */ +typedef enum { + RES_OK = 0, /* 0: Function succeeded */ + RES_ERROR, /* 1: Disk error */ + RES_STRERR, /* 2: Seream error */ + RES_NOTRDY, /* 3: Not ready */ + RES_PARERR /* 4: Invalid parameter */ +} DRESULT; + + +/*---------------------------------------*/ +/* Prototypes for disk control functions */ + +DSTATUS disk_initialize (void); +DRESULT disk_readp (void*, DWORD, WORD, WORD); + +BOOL assign_drives (int argc, char *argv[]); + +#define STA_NOINIT 0x01 /* Drive not initialized */ +#define STA_NODISK 0x02 /* No medium in the drive */ + +#define _DISKIO +#endif diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/integer.h b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/integer.h index 1d6bac368..851a78da2 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/integer.h +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/integer.h @@ -1,37 +1,37 @@ -/*-------------------------------------------*/
-/* Integer type definitions for FatFs module */
-/*-------------------------------------------*/
-
-#ifndef _INTEGER
-
-#if 0
-#include <windows.h>
-#else
-
-/* These types must be 16-bit, 32-bit or larger integer */
-typedef int INT;
-typedef unsigned int UINT;
-
-/* These types must be 8-bit integer */
-typedef signed char CHAR;
-typedef unsigned char UCHAR;
-typedef unsigned char BYTE;
-
-/* These types must be 16-bit integer */
-typedef short SHORT;
-typedef unsigned short USHORT;
-typedef unsigned short WORD;
-typedef unsigned short WCHAR;
-
-/* These types must be 32-bit integer */
-typedef long LONG;
-typedef unsigned long ULONG;
-typedef unsigned long DWORD;
-
-/* Boolean type */
-typedef enum { FALSE = 0, TRUE } BOOL;
-
-#endif
-
-#define _INTEGER
-#endif
+/*-------------------------------------------*/ +/* Integer type definitions for FatFs module */ +/*-------------------------------------------*/ + +#ifndef _INTEGER + +#if 0 +#include <windows.h> +#else + +/* These types must be 16-bit, 32-bit or larger integer */ +typedef int INT; +typedef unsigned int UINT; + +/* These types must be 8-bit integer */ +typedef signed char CHAR; +typedef unsigned char UCHAR; +typedef unsigned char BYTE; + +/* These types must be 16-bit integer */ +typedef short SHORT; +typedef unsigned short USHORT; +typedef unsigned short WORD; +typedef unsigned short WCHAR; + +/* These types must be 32-bit integer */ +typedef long LONG; +typedef unsigned long ULONG; +typedef unsigned long DWORD; + +/* Boolean type */ +typedef enum { FALSE = 0, TRUE } BOOL; + +#endif + +#define _INTEGER +#endif diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.c b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.c index 54c1d2406..b7b7fb8cb 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.c +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.c @@ -1,777 +1,777 @@ -/*----------------------------------------------------------------------------/
-/ Petit FatFs - FAT file system module R0.01a (C)ChaN, 2010
-/-----------------------------------------------------------------------------/
-/ Petit FatFs module is an open source software to implement FAT file system to
-/ small embedded systems. This is a free software and is opened for education,
-/ research and commercial developments under license policy of following trems.
-/
-/ Copyright (C) 2010, ChaN, all right reserved.
-/
-/ * The Petit FatFs module is a free software and there is NO WARRANTY.
-/ * No restriction on use. You can use, modify and redistribute it for
-/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
-/ * Redistributions of source code must retain the above copyright notice.
-/
-/-----------------------------------------------------------------------------/
-/ Jun 15,'09 R0.01a Branched from FatFs R0.07b
-/----------------------------------------------------------------------------*/
-
-#include "pff.h" /* Petit FatFs configurations and declarations */
-#include "diskio.h" /* Declarations of low level disk I/O functions */
-
-
-/*--------------------------------------------------------------------------
-
- Private Work Area
-
----------------------------------------------------------------------------*/
-
-static
-FATFS *FatFs; /* Pointer to the file system object (logical drive) */
-
-
-/*--------------------------------------------------------------------------
-
- Private Functions
-
----------------------------------------------------------------------------*/
-
-
-/*-----------------------------------------------------------------------*/
-/* String functions */
-/*-----------------------------------------------------------------------*/
-
-/* Fill memory */
-static
-void mem_set (void* dst, int val, int cnt) {
- char *d = (char*)dst;
- while (cnt--) *d++ = (char)val;
-}
-
-/* Compare memory to memory */
-static
-int mem_cmp (const void* dst, const void* src, int cnt) {
- const char *d = (const char *)dst, *s = (const char *)src;
- int r = 0;
- while (cnt-- && (r = *d++ - *s++) == 0) ;
- return r;
-}
-
-/* Check if chr is contained in the string */
-static
-int chk_chr (const char* str, int chr) {
- while (*str && *str != chr) str++;
- return *str;
-}
-
-
-
-/*-----------------------------------------------------------------------*/
-/* FAT access - Read value of a FAT entry */
-/*-----------------------------------------------------------------------*/
-
-static
-CLUST get_fat ( /* 1:IO error, Else:Cluster status */
- CLUST clst /* Cluster# to get the link information */
-)
-{
- WORD wc, bc, ofs;
- BYTE buf[4];
- FATFS *fs = FatFs;
-
-
- if (clst < 2 || clst >= fs->max_clust) /* Range check */
- return 1;
-
- switch (fs->fs_type) {
- case FS_FAT12 :
- bc = (WORD)clst; bc += bc / 2;
- ofs = bc % 512; bc /= 512;
- if (ofs != 511) {
- if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break;
- } else {
- if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break;
- if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break;
- }
- wc = LD_WORD(buf);
- return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
-
- case FS_FAT16 :
- if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break;
- return LD_WORD(buf);
-#if _FS_FAT32
- case FS_FAT32 :
- if (disk_readp(buf, fs->fatbase + clst / 128, (WORD)(((WORD)clst % 128) * 4), 4)) break;
- return LD_DWORD(buf) & 0x0FFFFFFF;
-#endif
- }
-
- return 1; /* An error occured at the disk I/O layer */
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Get sector# from cluster# */
-/*-----------------------------------------------------------------------*/
-
-static
-DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
- CLUST clst /* Cluster# to be converted */
-)
-{
- FATFS *fs = FatFs;
-
-
- clst -= 2;
- if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
- return (DWORD)clst * fs->csize + fs->database;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Rewind directory index */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_rewind (
- DIR *dj /* Pointer to directory object */
-)
-{
- CLUST clst;
- FATFS *fs = FatFs;
-
-
- dj->index = 0;
- clst = dj->sclust;
- if (clst == 1 || clst >= fs->max_clust) /* Check start cluster range */
- return FR_DISK_ERR;
-#if _FS_FAT32
- if (!clst && fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
- clst = fs->dirbase;
-#endif
- dj->clust = clst; /* Current cluster */
- dj->sect = clst ? clust2sect(clst) : fs->dirbase; /* Current sector */
-
- return FR_OK; /* Seek succeeded */
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Move directory index next */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
- DIR *dj /* Pointer to directory object */
-)
-{
- CLUST clst;
- WORD i;
- FATFS *fs = FatFs;
-
-
- i = dj->index + 1;
- if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
- return FR_NO_FILE;
-
- if (!(i & (16-1))) { /* Sector changed? */
- dj->sect++; /* Next sector */
-
- if (dj->clust == 0) { /* Static table */
- if (i >= fs->n_rootdir) /* Report EOT when end of table */
- return FR_NO_FILE;
- }
- else { /* Dynamic table */
- if (((i / 16) & (fs->csize-1)) == 0) { /* Cluster changed? */
- clst = get_fat(dj->clust); /* Get next cluster */
- if (clst <= 1) return FR_DISK_ERR;
- if (clst >= fs->max_clust) /* When it reached end of dynamic table */
- return FR_NO_FILE; /* Report EOT */
- dj->clust = clst; /* Initialize data for new cluster */
- dj->sect = clust2sect(clst);
- }
- }
- }
-
- dj->index = i;
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Directory handling - Find an object in the directory */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT dir_find (
- DIR *dj /* Pointer to the directory object linked to the file name */
-)
-{
- FRESULT res;
- BYTE c, *dir;
-
-
- res = dir_rewind(dj); /* Rewind directory object */
- if (res != FR_OK) return res;
-
- dir = FatFs->buf;
- do {
- res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
- ? FR_DISK_ERR : FR_OK;
- if (res != FR_OK) break;
- c = dir[DIR_Name]; /* First character */
- if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
- if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
- break;
- res = dir_next(dj); /* Next entry */
- } while (res == FR_OK);
-
- return res;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read an object from the directory */
-/*-----------------------------------------------------------------------*/
-#if _USE_DIR
-static
-FRESULT dir_read (
- DIR *dj /* Pointer to the directory object to store read object name */
-)
-{
- FRESULT res;
- BYTE a, c, *dir;
-
-
- res = FR_NO_FILE;
- while (dj->sect) {
- dir = FatFs->buf;
- res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
- ? FR_DISK_ERR : FR_OK;
- if (res != FR_OK) break;
- c = dir[DIR_Name];
- if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
- a = dir[DIR_Attr] & AM_MASK;
- if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */
- break;
- res = dir_next(dj); /* Next entry */
- if (res != FR_OK) break;
- }
-
- if (res != FR_OK) dj->sect = 0;
-
- return res;
-}
-#endif
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Pick a segment and create the object name in directory form */
-/*-----------------------------------------------------------------------*/
-
-
-static
-FRESULT create_name (
- DIR *dj, /* Pointer to the directory object */
- const char **path /* Pointer to pointer to the segment in the path string */
-)
-{
- BYTE c, ni, si, i, *sfn;
- const char *p;
-
- /* Create file name in directory form */
- sfn = dj->fn;
- mem_set(sfn, ' ', 11);
- si = i = 0; ni = 8;
- p = *path;
- for (;;) {
- c = p[si++];
- if (c < ' ' || c == '/') break; /* Break on end of segment */
- if (c == '.' || i >= ni) {
- if (ni != 8 || c != '.') return FR_INVALID_NAME;
- i = 8; ni = 11;
- continue;
- }
- if (c >= 0x7F || chk_chr(" +,;[=\\]\"*:<>\?|", c)) /* Reject unallowable chrs for SFN */
- return FR_INVALID_NAME;
- if (c >='a' && c <= 'z') c -= 0x20;
- sfn[i++] = c;
- }
- if (!i) return FR_INVALID_NAME; /* Reject null string */
- *path = &p[si]; /* Rerurn pointer to the next segment */
-
- sfn[11] = (c < ' ') ? 1 : 0; /* Set last segment flag if end of path */
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Get file information from directory entry */
-/*-----------------------------------------------------------------------*/
-#if _USE_DIR
-static
-void get_fileinfo ( /* No return code */
- DIR *dj, /* Pointer to the directory object */
- FILINFO *fno /* Pointer to store the file information */
-)
-{
- BYTE i, c, *dir;
- char *p;
-
-
- p = fno->fname;
- if (dj->sect) {
- dir = FatFs->buf;
- for (i = 0; i < 8; i++) { /* Copy file name body */
- c = dir[i];
- if (c == ' ') break;
- if (c == 0x05) c = 0xE5;
- *p++ = c;
- }
- if (dir[8] != ' ') { /* Copy file name extension */
- *p++ = '.';
- for (i = 8; i < 11; i++) {
- c = dir[i];
- if (c == ' ') break;
- *p++ = c;
- }
- }
- fno->fattrib = dir[DIR_Attr]; /* Attribute */
- fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
- fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
- fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
- }
- *p = 0;
-}
-#endif /* _USE_DIR */
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Follow a file path */
-/*-----------------------------------------------------------------------*/
-
-static
-FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
- DIR *dj, /* Directory object to return last directory and found object */
- const char *path /* Full-path string to find a file or directory */
-)
-{
- FRESULT res;
- BYTE *dir;
-
-
- if (*path == '/') path++; /* Strip heading separator */
- dj->sclust = 0; /* Set start directory (always root dir) */
-
- if ((BYTE)*path < ' ') { /* Null path means the root directory */
- res = dir_rewind(dj);
- FatFs->buf[0] = 0;
-
- } else { /* Follow path */
- for (;;) {
- res = create_name(dj, &path); /* Get a segment */
- if (res != FR_OK) break;
- res = dir_find(dj); /* Find it */
- if (res != FR_OK) { /* Could not find the object */
- if (res == FR_NO_FILE && !*(dj->fn+11))
- res = FR_NO_PATH;
- break;
- }
- if (*(dj->fn+11)) break; /* Last segment match. Function completed. */
- dir = FatFs->buf; /* There is next segment. Follow the sub directory */
- if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
- res = FR_NO_PATH; break;
- }
- dj->sclust =
-#if _FS_FAT32
- ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) |
-#endif
- LD_WORD(dir+DIR_FstClusLO);
- }
- }
-
- return res;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Check a sector if it is an FAT boot record */
-/*-----------------------------------------------------------------------*/
-
-static
-BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
- BYTE *buf, /* Working buffer */
- DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
-)
-{
- if (disk_readp(buf, sect, 510, 2)) /* Read the boot sector */
- return 3;
- if (LD_WORD(buf) != 0xAA55) /* Check record signature */
- return 2;
-
- if (!disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */
- return 0;
-#if _FS_FAT32
- if (!disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */
- return 0;
-#endif
- return 1;
-}
-
-
-
-
-/*--------------------------------------------------------------------------
-
- Public Functions
-
---------------------------------------------------------------------------*/
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Mount/Unmount a Locical Drive */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_mount (
- FATFS *fs /* Pointer to new file system object (NULL: Unmount) */
-)
-{
- BYTE fmt, buf[36];
- DWORD bsect, fsize, tsect, mclst;
-
-
- FatFs = 0;
- if (!fs) return FR_OK; /* Unregister fs object */
-
- if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */
- return FR_NOT_READY;
-
- /* Search FAT partition on the drive */
- bsect = 0;
- fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */
- if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */
- /* Check a partition listed in top of the partition table */
- if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */
- fmt = 3;
- } else {
- if (buf[4]) { /* Is the partition existing? */
- bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */
- fmt = check_fs(buf, bsect); /* Check the partition */
- }
- }
- }
- if (fmt == 3) return FR_DISK_ERR;
- if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */
-
- /* Initialize the file system object */
- if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR;
-
- fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */
- if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13);
-
- fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */
- fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */
- fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */
- fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */
- tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */
- if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13);
- mclst = (tsect /* Last cluster# + 1 */
- - LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16
- ) / fs->csize + 2;
- fs->max_clust = (CLUST)mclst;
-
- fmt = FS_FAT12; /* Determine the FAT sub type */
- if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
- if (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */
-#if _FS_FAT32
- fmt = FS_FAT32;
-#else
- return FR_NO_FILESYSTEM;
-#endif
-
- fs->fs_type = fmt; /* FAT sub-type */
-#if _FS_FAT32
- if (fmt == FS_FAT32)
- fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */
- else
-#endif
- fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
- fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */
-
- fs->flag = 0;
- FatFs = fs;
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Open or Create a File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_open (
- const char *path /* Pointer to the file name */
-)
-{
- FRESULT res;
- DIR dj;
- BYTE sp[12], dir[32];
- FATFS *fs = FatFs;
-
-
- if (!fs) /* Check file system */
- return FR_NOT_ENABLED;
-
- fs->flag = 0;
- fs->buf = dir;
- dj.fn = sp;
- res = follow_path(&dj, path); /* Follow the file path */
- if (res != FR_OK) return res; /* Follow failed */
- if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
- return FR_NO_FILE;
-
- fs->org_clust = /* File start cluster */
-#if _FS_FAT32
- ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) |
-#endif
- LD_WORD(dir+DIR_FstClusLO);
- fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
- fs->fptr = 0; /* File pointer */
- fs->flag = FA_READ;
-
- return FR_OK;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read File */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_read (
- void* dest, /* Pointer to the destination object */
- WORD btr, /* Number of bytes to read (bit15:destination) */
- WORD* br /* Pointer to number of bytes read */
-)
-{
- DRESULT dr;
- CLUST clst;
- DWORD sect, remain;
- WORD rcnt;
- BYTE *rbuff = dest;
- FATFS *fs = FatFs;
-
-
- *br = 0;
- if (!fs) return FR_NOT_ENABLED; /* Check file system */
- if (!(fs->flag & FA_READ))
- return FR_INVALID_OBJECT;
-
- remain = fs->fsize - fs->fptr;
- if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
-
- for ( ; btr; /* Repeat until all data transferred */
- rbuff += rcnt, fs->fptr += rcnt, *br += rcnt, btr -= rcnt) {
- if ((fs->fptr % 512) == 0) { /* On the sector boundary? */
- if ((fs->fptr / 512 % fs->csize) == 0) { /* On the cluster boundary? */
- clst = (fs->fptr == 0) ? /* On the top of the file? */
- fs->org_clust : get_fat(fs->curr_clust);
- if (clst <= 1) {
- fs->flag = 0; return FR_DISK_ERR;
- }
- fs->curr_clust = clst; /* Update current cluster */
- fs->csect = 0; /* Reset sector offset in the cluster */
- }
- sect = clust2sect(fs->curr_clust); /* Get current sector */
- if (!sect) {
- fs->flag = 0; return FR_DISK_ERR;
- }
- sect += fs->csect;
- fs->dsect = sect;
- fs->csect++; /* Next sector address in the cluster */
- }
- rcnt = 512 - ((WORD)fs->fptr % 512); /* Get partial sector data from sector buffer */
- if (rcnt > btr) rcnt = btr;
- if (fs->flag & FA_STREAM) {
- dr = disk_readp(dest, fs->dsect, (WORD)(fs->fptr % 512), (WORD)(rcnt | 0x8000));
- } else {
- dr = disk_readp(rbuff, fs->dsect, (WORD)(fs->fptr % 512), rcnt);
- }
- if (dr) {
- fs->flag = 0;
- return (dr == RES_STRERR) ? FR_STREAM_ERR : FR_DISK_ERR;
- }
- }
-
- return FR_OK;
-}
-
-
-
-
-#if _USE_LSEEK
-/*-----------------------------------------------------------------------*/
-/* Seek File R/W Pointer */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_lseek (
- DWORD ofs /* File pointer from top of file */
-)
-{
- CLUST clst;
- DWORD bcs, nsect, ifptr;
- FATFS *fs = FatFs;
-
-
- if (!fs) return FR_NOT_ENABLED; /* Check file system */
- if (!(fs->flag & FA_READ))
- return FR_INVALID_OBJECT;
-
- if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */
- ifptr = fs->fptr;
- fs->fptr = 0;
- if (ofs > 0) {
- bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */
- if (ifptr > 0 &&
- (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
- fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
- ofs -= fs->fptr;
- clst = fs->curr_clust;
- } else { /* When seek to back cluster, */
- clst = fs->org_clust; /* start from the first cluster */
- fs->curr_clust = clst;
- }
- while (ofs > bcs) { /* Cluster following loop */
- clst = get_fat(clst); /* Follow cluster chain if not in write mode */
- if (clst <= 1 || clst >= fs->max_clust) {
- fs->flag = 0; return FR_DISK_ERR;
- }
- fs->curr_clust = clst;
- fs->fptr += bcs;
- ofs -= bcs;
- }
- fs->fptr += ofs;
- fs->csect = (BYTE)(ofs / 512) + 1; /* Sector offset in the cluster */
- nsect = clust2sect(clst); /* Current sector */
- if (!nsect) {
- fs->flag = 0; return FR_DISK_ERR;
- }
- fs->dsect = nsect + fs->csect - 1;
- }
-
- return FR_OK;
-}
-#endif
-
-
-#if _USE_DIR
-/*-----------------------------------------------------------------------*/
-/* Create a Directroy Object */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_opendir (
- DIR *dj, /* Pointer to directory object to create */
- const char *path /* Pointer to the directory path */
-)
-{
- FRESULT res;
- BYTE sp[12], dir[32];
- FATFS *fs = FatFs;
-
-
- if (!fs) { /* Check file system */
- res = FR_NOT_ENABLED;
- } else {
- fs->buf = dir;
- dj->fn = sp;
- res = follow_path(dj, path); /* Follow the path to the directory */
- if (res == FR_OK) { /* Follow completed */
- if (dir[0]) { /* It is not the root dir */
- if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
- dj->sclust =
-#if _FS_FAT32
- ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) |
-#endif
- LD_WORD(dir+DIR_FstClusLO);
- } else { /* The object is not a directory */
- res = FR_NO_PATH;
- }
- }
- if (res == FR_OK) {
- res = dir_rewind(dj); /* Rewind dir */
- }
- }
- if (res == FR_NO_FILE) res = FR_NO_PATH;
- }
-
- return res;
-}
-
-
-
-
-/*-----------------------------------------------------------------------*/
-/* Read Directory Entry in Sequense */
-/*-----------------------------------------------------------------------*/
-
-FRESULT pf_readdir (
- DIR *dj, /* Pointer to the open directory object */
- FILINFO *fno /* Pointer to file information to return */
-)
-{
- FRESULT res;
- BYTE sp[12], dir[32];
- FATFS *fs = FatFs;
-
-
- if (!fs) { /* Check file system */
- res = FR_NOT_ENABLED;
- } else {
- fs->buf = dir;
- dj->fn = sp;
- if (!fno) {
- res = dir_rewind(dj);
- } else {
- res = dir_read(dj);
- if (res == FR_NO_FILE) {
- dj->sect = 0;
- res = FR_OK;
- }
- if (res == FR_OK) { /* A valid entry is found */
- get_fileinfo(dj, fno); /* Get the object information */
- res = dir_next(dj); /* Increment index for next */
- if (res == FR_NO_FILE) {
- dj->sect = 0;
- res = FR_OK;
- }
- }
- }
- }
-
- return res;
-}
-
-#endif /* _FS_DIR */
-
+/*----------------------------------------------------------------------------/ +/ Petit FatFs - FAT file system module R0.01a (C)ChaN, 2010 +/-----------------------------------------------------------------------------/ +/ Petit FatFs module is an open source software to implement FAT file system to +/ small embedded systems. This is a free software and is opened for education, +/ research and commercial developments under license policy of following trems. +/ +/ Copyright (C) 2010, ChaN, all right reserved. +/ +/ * The Petit FatFs module is a free software and there is NO WARRANTY. +/ * No restriction on use. You can use, modify and redistribute it for +/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY. +/ * Redistributions of source code must retain the above copyright notice. +/ +/-----------------------------------------------------------------------------/ +/ Jun 15,'09 R0.01a Branched from FatFs R0.07b +/----------------------------------------------------------------------------*/ + +#include "pff.h" /* Petit FatFs configurations and declarations */ +#include "diskio.h" /* Declarations of low level disk I/O functions */ + + +/*-------------------------------------------------------------------------- + + Private Work Area + +---------------------------------------------------------------------------*/ + +static +FATFS *FatFs; /* Pointer to the file system object (logical drive) */ + + +/*-------------------------------------------------------------------------- + + Private Functions + +---------------------------------------------------------------------------*/ + + +/*-----------------------------------------------------------------------*/ +/* String functions */ +/*-----------------------------------------------------------------------*/ + +/* Fill memory */ +static +void mem_set (void* dst, int val, int cnt) { + char *d = (char*)dst; + while (cnt--) *d++ = (char)val; +} + +/* Compare memory to memory */ +static +int mem_cmp (const void* dst, const void* src, int cnt) { + const char *d = (const char *)dst, *s = (const char *)src; + int r = 0; + while (cnt-- && (r = *d++ - *s++) == 0) ; + return r; +} + +/* Check if chr is contained in the string */ +static +int chk_chr (const char* str, int chr) { + while (*str && *str != chr) str++; + return *str; +} + + + +/*-----------------------------------------------------------------------*/ +/* FAT access - Read value of a FAT entry */ +/*-----------------------------------------------------------------------*/ + +static +CLUST get_fat ( /* 1:IO error, Else:Cluster status */ + CLUST clst /* Cluster# to get the link information */ +) +{ + WORD wc, bc, ofs; + BYTE buf[4]; + FATFS *fs = FatFs; + + + if (clst < 2 || clst >= fs->max_clust) /* Range check */ + return 1; + + switch (fs->fs_type) { + case FS_FAT12 : + bc = (WORD)clst; bc += bc / 2; + ofs = bc % 512; bc /= 512; + if (ofs != 511) { + if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break; + } else { + if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break; + if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break; + } + wc = LD_WORD(buf); + return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); + + case FS_FAT16 : + if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break; + return LD_WORD(buf); +#if _FS_FAT32 + case FS_FAT32 : + if (disk_readp(buf, fs->fatbase + clst / 128, (WORD)(((WORD)clst % 128) * 4), 4)) break; + return LD_DWORD(buf) & 0x0FFFFFFF; +#endif + } + + return 1; /* An error occured at the disk I/O layer */ +} + + + + +/*-----------------------------------------------------------------------*/ +/* Get sector# from cluster# */ +/*-----------------------------------------------------------------------*/ + +static +DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ + CLUST clst /* Cluster# to be converted */ +) +{ + FATFS *fs = FatFs; + + + clst -= 2; + if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */ + return (DWORD)clst * fs->csize + fs->database; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Directory handling - Rewind directory index */ +/*-----------------------------------------------------------------------*/ + +static +FRESULT dir_rewind ( + DIR *dj /* Pointer to directory object */ +) +{ + CLUST clst; + FATFS *fs = FatFs; + + + dj->index = 0; + clst = dj->sclust; + if (clst == 1 || clst >= fs->max_clust) /* Check start cluster range */ + return FR_DISK_ERR; +#if _FS_FAT32 + if (!clst && fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ + clst = fs->dirbase; +#endif + dj->clust = clst; /* Current cluster */ + dj->sect = clst ? clust2sect(clst) : fs->dirbase; /* Current sector */ + + return FR_OK; /* Seek succeeded */ +} + + + + +/*-----------------------------------------------------------------------*/ +/* Directory handling - Move directory index next */ +/*-----------------------------------------------------------------------*/ + +static +FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */ + DIR *dj /* Pointer to directory object */ +) +{ + CLUST clst; + WORD i; + FATFS *fs = FatFs; + + + i = dj->index + 1; + if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ + return FR_NO_FILE; + + if (!(i & (16-1))) { /* Sector changed? */ + dj->sect++; /* Next sector */ + + if (dj->clust == 0) { /* Static table */ + if (i >= fs->n_rootdir) /* Report EOT when end of table */ + return FR_NO_FILE; + } + else { /* Dynamic table */ + if (((i / 16) & (fs->csize-1)) == 0) { /* Cluster changed? */ + clst = get_fat(dj->clust); /* Get next cluster */ + if (clst <= 1) return FR_DISK_ERR; + if (clst >= fs->max_clust) /* When it reached end of dynamic table */ + return FR_NO_FILE; /* Report EOT */ + dj->clust = clst; /* Initialize data for new cluster */ + dj->sect = clust2sect(clst); + } + } + } + + dj->index = i; + + return FR_OK; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Directory handling - Find an object in the directory */ +/*-----------------------------------------------------------------------*/ + +static +FRESULT dir_find ( + DIR *dj /* Pointer to the directory object linked to the file name */ +) +{ + FRESULT res; + BYTE c, *dir; + + + res = dir_rewind(dj); /* Rewind directory object */ + if (res != FR_OK) return res; + + dir = FatFs->buf; + do { + res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */ + ? FR_DISK_ERR : FR_OK; + if (res != FR_OK) break; + c = dir[DIR_Name]; /* First character */ + if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ + if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ + break; + res = dir_next(dj); /* Next entry */ + } while (res == FR_OK); + + return res; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Read an object from the directory */ +/*-----------------------------------------------------------------------*/ +#if _USE_DIR +static +FRESULT dir_read ( + DIR *dj /* Pointer to the directory object to store read object name */ +) +{ + FRESULT res; + BYTE a, c, *dir; + + + res = FR_NO_FILE; + while (dj->sect) { + dir = FatFs->buf; + res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */ + ? FR_DISK_ERR : FR_OK; + if (res != FR_OK) break; + c = dir[DIR_Name]; + if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ + a = dir[DIR_Attr] & AM_MASK; + if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */ + break; + res = dir_next(dj); /* Next entry */ + if (res != FR_OK) break; + } + + if (res != FR_OK) dj->sect = 0; + + return res; +} +#endif + + + +/*-----------------------------------------------------------------------*/ +/* Pick a segment and create the object name in directory form */ +/*-----------------------------------------------------------------------*/ + + +static +FRESULT create_name ( + DIR *dj, /* Pointer to the directory object */ + const char **path /* Pointer to pointer to the segment in the path string */ +) +{ + BYTE c, ni, si, i, *sfn; + const char *p; + + /* Create file name in directory form */ + sfn = dj->fn; + mem_set(sfn, ' ', 11); + si = i = 0; ni = 8; + p = *path; + for (;;) { + c = p[si++]; + if (c < ' ' || c == '/') break; /* Break on end of segment */ + if (c == '.' || i >= ni) { + if (ni != 8 || c != '.') return FR_INVALID_NAME; + i = 8; ni = 11; + continue; + } + if (c >= 0x7F || chk_chr(" +,;[=\\]\"*:<>\?|", c)) /* Reject unallowable chrs for SFN */ + return FR_INVALID_NAME; + if (c >='a' && c <= 'z') c -= 0x20; + sfn[i++] = c; + } + if (!i) return FR_INVALID_NAME; /* Reject null string */ + *path = &p[si]; /* Rerurn pointer to the next segment */ + + sfn[11] = (c < ' ') ? 1 : 0; /* Set last segment flag if end of path */ + + return FR_OK; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Get file information from directory entry */ +/*-----------------------------------------------------------------------*/ +#if _USE_DIR +static +void get_fileinfo ( /* No return code */ + DIR *dj, /* Pointer to the directory object */ + FILINFO *fno /* Pointer to store the file information */ +) +{ + BYTE i, c, *dir; + char *p; + + + p = fno->fname; + if (dj->sect) { + dir = FatFs->buf; + for (i = 0; i < 8; i++) { /* Copy file name body */ + c = dir[i]; + if (c == ' ') break; + if (c == 0x05) c = 0xE5; + *p++ = c; + } + if (dir[8] != ' ') { /* Copy file name extension */ + *p++ = '.'; + for (i = 8; i < 11; i++) { + c = dir[i]; + if (c == ' ') break; + *p++ = c; + } + } + fno->fattrib = dir[DIR_Attr]; /* Attribute */ + fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ + fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ + fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ + } + *p = 0; +} +#endif /* _USE_DIR */ + + + +/*-----------------------------------------------------------------------*/ +/* Follow a file path */ +/*-----------------------------------------------------------------------*/ + +static +FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ + DIR *dj, /* Directory object to return last directory and found object */ + const char *path /* Full-path string to find a file or directory */ +) +{ + FRESULT res; + BYTE *dir; + + + if (*path == '/') path++; /* Strip heading separator */ + dj->sclust = 0; /* Set start directory (always root dir) */ + + if ((BYTE)*path < ' ') { /* Null path means the root directory */ + res = dir_rewind(dj); + FatFs->buf[0] = 0; + + } else { /* Follow path */ + for (;;) { + res = create_name(dj, &path); /* Get a segment */ + if (res != FR_OK) break; + res = dir_find(dj); /* Find it */ + if (res != FR_OK) { /* Could not find the object */ + if (res == FR_NO_FILE && !*(dj->fn+11)) + res = FR_NO_PATH; + break; + } + if (*(dj->fn+11)) break; /* Last segment match. Function completed. */ + dir = FatFs->buf; /* There is next segment. Follow the sub directory */ + if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ + res = FR_NO_PATH; break; + } + dj->sclust = +#if _FS_FAT32 + ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | +#endif + LD_WORD(dir+DIR_FstClusLO); + } + } + + return res; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Check a sector if it is an FAT boot record */ +/*-----------------------------------------------------------------------*/ + +static +BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */ + BYTE *buf, /* Working buffer */ + DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ +) +{ + if (disk_readp(buf, sect, 510, 2)) /* Read the boot sector */ + return 3; + if (LD_WORD(buf) != 0xAA55) /* Check record signature */ + return 2; + + if (!disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */ + return 0; +#if _FS_FAT32 + if (!disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */ + return 0; +#endif + return 1; +} + + + + +/*-------------------------------------------------------------------------- + + Public Functions + +--------------------------------------------------------------------------*/ + + + +/*-----------------------------------------------------------------------*/ +/* Mount/Unmount a Locical Drive */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_mount ( + FATFS *fs /* Pointer to new file system object (NULL: Unmount) */ +) +{ + BYTE fmt, buf[36]; + DWORD bsect, fsize, tsect, mclst; + + + FatFs = 0; + if (!fs) return FR_OK; /* Unregister fs object */ + + if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */ + return FR_NOT_READY; + + /* Search FAT partition on the drive */ + bsect = 0; + fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */ + if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */ + /* Check a partition listed in top of the partition table */ + if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */ + fmt = 3; + } else { + if (buf[4]) { /* Is the partition existing? */ + bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */ + fmt = check_fs(buf, bsect); /* Check the partition */ + } + } + } + if (fmt == 3) return FR_DISK_ERR; + if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */ + + /* Initialize the file system object */ + if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR; + + fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */ + if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13); + + fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */ + fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */ + fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */ + fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */ + tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */ + if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13); + mclst = (tsect /* Last cluster# + 1 */ + - LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16 + ) / fs->csize + 2; + fs->max_clust = (CLUST)mclst; + + fmt = FS_FAT12; /* Determine the FAT sub type */ + if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */ + if (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */ +#if _FS_FAT32 + fmt = FS_FAT32; +#else + return FR_NO_FILESYSTEM; +#endif + + fs->fs_type = fmt; /* FAT sub-type */ +#if _FS_FAT32 + if (fmt == FS_FAT32) + fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */ + else +#endif + fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */ + fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */ + + fs->flag = 0; + FatFs = fs; + + return FR_OK; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Open or Create a File */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_open ( + const char *path /* Pointer to the file name */ +) +{ + FRESULT res; + DIR dj; + BYTE sp[12], dir[32]; + FATFS *fs = FatFs; + + + if (!fs) /* Check file system */ + return FR_NOT_ENABLED; + + fs->flag = 0; + fs->buf = dir; + dj.fn = sp; + res = follow_path(&dj, path); /* Follow the file path */ + if (res != FR_OK) return res; /* Follow failed */ + if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ + return FR_NO_FILE; + + fs->org_clust = /* File start cluster */ +#if _FS_FAT32 + ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | +#endif + LD_WORD(dir+DIR_FstClusLO); + fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ + fs->fptr = 0; /* File pointer */ + fs->flag = FA_READ; + + return FR_OK; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Read File */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_read ( + void* dest, /* Pointer to the destination object */ + WORD btr, /* Number of bytes to read (bit15:destination) */ + WORD* br /* Pointer to number of bytes read */ +) +{ + DRESULT dr; + CLUST clst; + DWORD sect, remain; + WORD rcnt; + BYTE *rbuff = dest; + FATFS *fs = FatFs; + + + *br = 0; + if (!fs) return FR_NOT_ENABLED; /* Check file system */ + if (!(fs->flag & FA_READ)) + return FR_INVALID_OBJECT; + + remain = fs->fsize - fs->fptr; + if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ + + for ( ; btr; /* Repeat until all data transferred */ + rbuff += rcnt, fs->fptr += rcnt, *br += rcnt, btr -= rcnt) { + if ((fs->fptr % 512) == 0) { /* On the sector boundary? */ + if ((fs->fptr / 512 % fs->csize) == 0) { /* On the cluster boundary? */ + clst = (fs->fptr == 0) ? /* On the top of the file? */ + fs->org_clust : get_fat(fs->curr_clust); + if (clst <= 1) { + fs->flag = 0; return FR_DISK_ERR; + } + fs->curr_clust = clst; /* Update current cluster */ + fs->csect = 0; /* Reset sector offset in the cluster */ + } + sect = clust2sect(fs->curr_clust); /* Get current sector */ + if (!sect) { + fs->flag = 0; return FR_DISK_ERR; + } + sect += fs->csect; + fs->dsect = sect; + fs->csect++; /* Next sector address in the cluster */ + } + rcnt = 512 - ((WORD)fs->fptr % 512); /* Get partial sector data from sector buffer */ + if (rcnt > btr) rcnt = btr; + if (fs->flag & FA_STREAM) { + dr = disk_readp(dest, fs->dsect, (WORD)(fs->fptr % 512), (WORD)(rcnt | 0x8000)); + } else { + dr = disk_readp(rbuff, fs->dsect, (WORD)(fs->fptr % 512), rcnt); + } + if (dr) { + fs->flag = 0; + return (dr == RES_STRERR) ? FR_STREAM_ERR : FR_DISK_ERR; + } + } + + return FR_OK; +} + + + + +#if _USE_LSEEK +/*-----------------------------------------------------------------------*/ +/* Seek File R/W Pointer */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_lseek ( + DWORD ofs /* File pointer from top of file */ +) +{ + CLUST clst; + DWORD bcs, nsect, ifptr; + FATFS *fs = FatFs; + + + if (!fs) return FR_NOT_ENABLED; /* Check file system */ + if (!(fs->flag & FA_READ)) + return FR_INVALID_OBJECT; + + if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */ + ifptr = fs->fptr; + fs->fptr = 0; + if (ofs > 0) { + bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */ + if (ifptr > 0 && + (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ + fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ + ofs -= fs->fptr; + clst = fs->curr_clust; + } else { /* When seek to back cluster, */ + clst = fs->org_clust; /* start from the first cluster */ + fs->curr_clust = clst; + } + while (ofs > bcs) { /* Cluster following loop */ + clst = get_fat(clst); /* Follow cluster chain if not in write mode */ + if (clst <= 1 || clst >= fs->max_clust) { + fs->flag = 0; return FR_DISK_ERR; + } + fs->curr_clust = clst; + fs->fptr += bcs; + ofs -= bcs; + } + fs->fptr += ofs; + fs->csect = (BYTE)(ofs / 512) + 1; /* Sector offset in the cluster */ + nsect = clust2sect(clst); /* Current sector */ + if (!nsect) { + fs->flag = 0; return FR_DISK_ERR; + } + fs->dsect = nsect + fs->csect - 1; + } + + return FR_OK; +} +#endif + + +#if _USE_DIR +/*-----------------------------------------------------------------------*/ +/* Create a Directroy Object */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_opendir ( + DIR *dj, /* Pointer to directory object to create */ + const char *path /* Pointer to the directory path */ +) +{ + FRESULT res; + BYTE sp[12], dir[32]; + FATFS *fs = FatFs; + + + if (!fs) { /* Check file system */ + res = FR_NOT_ENABLED; + } else { + fs->buf = dir; + dj->fn = sp; + res = follow_path(dj, path); /* Follow the path to the directory */ + if (res == FR_OK) { /* Follow completed */ + if (dir[0]) { /* It is not the root dir */ + if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ + dj->sclust = +#if _FS_FAT32 + ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | +#endif + LD_WORD(dir+DIR_FstClusLO); + } else { /* The object is not a directory */ + res = FR_NO_PATH; + } + } + if (res == FR_OK) { + res = dir_rewind(dj); /* Rewind dir */ + } + } + if (res == FR_NO_FILE) res = FR_NO_PATH; + } + + return res; +} + + + + +/*-----------------------------------------------------------------------*/ +/* Read Directory Entry in Sequense */ +/*-----------------------------------------------------------------------*/ + +FRESULT pf_readdir ( + DIR *dj, /* Pointer to the open directory object */ + FILINFO *fno /* Pointer to file information to return */ +) +{ + FRESULT res; + BYTE sp[12], dir[32]; + FATFS *fs = FatFs; + + + if (!fs) { /* Check file system */ + res = FR_NOT_ENABLED; + } else { + fs->buf = dir; + dj->fn = sp; + if (!fno) { + res = dir_rewind(dj); + } else { + res = dir_read(dj); + if (res == FR_NO_FILE) { + dj->sect = 0; + res = FR_OK; + } + if (res == FR_OK) { /* A valid entry is found */ + get_fileinfo(dj, fno); /* Get the object information */ + res = dir_next(dj); /* Increment index for next */ + if (res == FR_NO_FILE) { + dj->sect = 0; + res = FR_OK; + } + } + } + } + + return res; +} + +#endif /* _FS_DIR */ + diff --git a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.h b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.h index abd4f541c..bd43fbce1 100644 --- a/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.h +++ b/Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/pff.h @@ -1,237 +1,237 @@ -/*---------------------------------------------------------------------------/
-/ Petit FatFs - FAT file system module include file R0.01a (C)ChaN, 2010
-/----------------------------------------------------------------------------/
-/ Petit FatFs module is an open source software to implement FAT file system to
-/ small embedded systems. This is a free software and is opened for education,
-/ research and commercial developments under license policy of following trems.
-/
-/ Copyright (C) 2010, ChaN, all right reserved.
-/
-/ * The Petit FatFs module is a free software and there is NO WARRANTY.
-/ * No restriction on use. You can use, modify and redistribute it for
-/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
-/ * Redistributions of source code must retain the above copyright notice.
-/----------------------------------------------------------------------------*/
-
-#include "integer.h"
-
-/*---------------------------------------------------------------------------/
-/ Petit FatFs Configuration Options
-/
-/ CAUTION! Do not forget to make clean the project after any changes to
-/ the configuration options.
-/
-/----------------------------------------------------------------------------*/
-#ifndef _FATFS
-#define _FATFS
-
-#define _WORD_ACCESS 0
-/* The _WORD_ACCESS option defines which access method is used to the word
-/ data in the FAT structure.
-/
-/ 0: Byte-by-byte access. Always compatible with all platforms.
-/ 1: Word access. Do not choose this unless following condition is met.
-/
-/ When the byte order on the memory is big-endian or address miss-aligned
-/ word access results incorrect behavior, the _WORD_ACCESS must be set to 0.
-/ If it is not the case, the value can also be set to 1 to improve the
-/ performance and code efficiency. */
-
-
-#define _USE_DIR 0
-/* To enable pf_opendir and pf_readdir function, set _USE_DIR to 1. */
-
-
-#define _USE_LSEEK 0
-/* To enable pf_lseek function, set _USE_LSEEK to 1. */
-
-
-#define _FS_FAT32 1
-/* To enable FAT32 support, set _FS_FAT32 to 1. */
-
-
-/* End of configuration options. Do not change followings without care. */
-/*--------------------------------------------------------------------------*/
-
-
-#if _FS_FAT32
-#define CLUST DWORD
-#else
-#define CLUST WORD
-#endif
-
-
-/* File system object structure */
-
-typedef struct _FATFS_ {
- BYTE fs_type; /* FAT sub type */
- BYTE csize; /* Number of sectors per cluster */
- BYTE flag; /* File status flags */
- BYTE csect; /* File sector address in the cluster */
- WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */
- BYTE* buf; /* Pointer to the disk access buffer */
- CLUST max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */
- DWORD fatbase; /* FAT start sector */
- DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */
- DWORD database; /* Data start sector */
- DWORD fptr; /* File R/W pointer */
- DWORD fsize; /* File size */
- CLUST org_clust; /* File start cluster */
- CLUST curr_clust; /* File current cluster */
- DWORD dsect; /* File current data sector */
-} FATFS;
-
-
-
-/* Directory object structure */
-
-typedef struct _DIR_ {
- WORD index; /* Current read/write index number */
- BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
- CLUST sclust; /* Table start cluster (0:Static table) */
- CLUST clust; /* Current cluster */
- DWORD sect; /* Current sector */
-} DIR;
-
-
-
-/* File status structure */
-
-typedef struct _FILINFO_ {
- DWORD fsize; /* File size */
- WORD fdate; /* Last modified date */
- WORD ftime; /* Last modified time */
- BYTE fattrib; /* Attribute */
- char fname[13]; /* File name */
-} FILINFO;
-
-
-
-/* File function return code (FRESULT) */
-
-typedef enum {
- FR_OK = 0, /* 0 */
- FR_DISK_ERR, /* 1 */
- FR_NOT_READY, /* 2 */
- FR_NO_FILE, /* 3 */
- FR_NO_PATH, /* 4 */
- FR_INVALID_NAME, /* 5 */
- FR_STREAM_ERR, /* 6 */
- FR_INVALID_OBJECT, /* 7 */
- FR_NOT_ENABLED, /* 8 */
- FR_NO_FILESYSTEM /* 9 */
-} FRESULT;
-
-
-
-/*--------------------------------------------------------------*/
-/* Petit FatFs module application interface */
-
-FRESULT pf_mount (FATFS*); /* Mount/Unmount a logical drive */
-FRESULT pf_open (const char*); /* Open a file */
-FRESULT pf_read (void*, WORD, WORD*); /* Read data from a file */
-FRESULT pf_lseek (DWORD); /* Move file pointer of a file object */
-FRESULT pf_opendir (DIR*, const char*); /* Open an existing directory */
-FRESULT pf_readdir (DIR*, FILINFO*); /* Read a directory item */
-
-
-
-/*--------------------------------------------------------------*/
-/* Flags and offset address */
-
-/* File status flag (FATFS.flag) */
-
-#define FA_READ 0x01
-#define FA_STREAM 0x40
-#define FA__ERROR 0x80
-
-
-/* FAT sub type (FATFS.fs_type) */
-
-#define FS_FAT12 1
-#define FS_FAT16 2
-#define FS_FAT32 3
-
-
-/* File attribute bits for directory entry */
-
-#define AM_RDO 0x01 /* Read only */
-#define AM_HID 0x02 /* Hidden */
-#define AM_SYS 0x04 /* System */
-#define AM_VOL 0x08 /* Volume label */
-#define AM_LFN 0x0F /* LFN entry */
-#define AM_DIR 0x10 /* Directory */
-#define AM_ARC 0x20 /* Archive */
-#define AM_MASK 0x3F /* Mask of defined bits */
-
-
-/* FatFs refers the members in the FAT structures with byte offset instead
-/ of structure member because there are incompatibility of the packing option
-/ between various compilers. */
-
-#define BS_jmpBoot 0
-#define BS_OEMName 3
-#define BPB_BytsPerSec 11
-#define BPB_SecPerClus 13
-#define BPB_RsvdSecCnt 14
-#define BPB_NumFATs 16
-#define BPB_RootEntCnt 17
-#define BPB_TotSec16 19
-#define BPB_Media 21
-#define BPB_FATSz16 22
-#define BPB_SecPerTrk 24
-#define BPB_NumHeads 26
-#define BPB_HiddSec 28
-#define BPB_TotSec32 32
-#define BS_55AA 510
-
-#define BS_DrvNum 36
-#define BS_BootSig 38
-#define BS_VolID 39
-#define BS_VolLab 43
-#define BS_FilSysType 54
-
-#define BPB_FATSz32 36
-#define BPB_ExtFlags 40
-#define BPB_FSVer 42
-#define BPB_RootClus 44
-#define BPB_FSInfo 48
-#define BPB_BkBootSec 50
-#define BS_DrvNum32 64
-#define BS_BootSig32 66
-#define BS_VolID32 67
-#define BS_VolLab32 71
-#define BS_FilSysType32 82
-
-#define MBR_Table 446
-
-#define DIR_Name 0
-#define DIR_Attr 11
-#define DIR_NTres 12
-#define DIR_CrtTime 14
-#define DIR_CrtDate 16
-#define DIR_FstClusHI 20
-#define DIR_WrtTime 22
-#define DIR_WrtDate 24
-#define DIR_FstClusLO 26
-#define DIR_FileSize 28
-
-
-
-/*--------------------------------*/
-/* Multi-byte word access macros */
-
-#if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */
-#define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr))
-#define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr))
-#define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val)
-#define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
-#else /* Use byte-by-byte access to the FAT structure */
-#define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
-#define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr))
-#define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8)
-#define ST_DWORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8); *(BYTE*)((ptr)+2)=(BYTE)((DWORD)(val)>>16); *(BYTE*)((ptr)+3)=(BYTE)((DWORD)(val)>>24)
-#endif
-
-
-#endif /* _FATFS */
+/*---------------------------------------------------------------------------/ +/ Petit FatFs - FAT file system module include file R0.01a (C)ChaN, 2010 +/----------------------------------------------------------------------------/ +/ Petit FatFs module is an open source software to implement FAT file system to +/ small embedded systems. This is a free software and is opened for education, +/ research and commercial developments under license policy of following trems. +/ +/ Copyright (C) 2010, ChaN, all right reserved. +/ +/ * The Petit FatFs module is a free software and there is NO WARRANTY. +/ * No restriction on use. You can use, modify and redistribute it for +/ personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY. +/ * Redistributions of source code must retain the above copyright notice. +/----------------------------------------------------------------------------*/ + +#include "integer.h" + +/*---------------------------------------------------------------------------/ +/ Petit FatFs Configuration Options +/ +/ CAUTION! Do not forget to make clean the project after any changes to +/ the configuration options. +/ +/----------------------------------------------------------------------------*/ +#ifndef _FATFS +#define _FATFS + +#define _WORD_ACCESS 0 +/* The _WORD_ACCESS option defines which access method is used to the word +/ data in the FAT structure. +/ +/ 0: Byte-by-byte access. Always compatible with all platforms. +/ 1: Word access. Do not choose this unless following condition is met. +/ +/ When the byte order on the memory is big-endian or address miss-aligned +/ word access results incorrect behavior, the _WORD_ACCESS must be set to 0. +/ If it is not the case, the value can also be set to 1 to improve the +/ performance and code efficiency. */ + + +#define _USE_DIR 0 +/* To enable pf_opendir and pf_readdir function, set _USE_DIR to 1. */ + + +#define _USE_LSEEK 0 +/* To enable pf_lseek function, set _USE_LSEEK to 1. */ + + +#define _FS_FAT32 1 +/* To enable FAT32 support, set _FS_FAT32 to 1. */ + + +/* End of configuration options. Do not change followings without care. */ +/*--------------------------------------------------------------------------*/ + + +#if _FS_FAT32 +#define CLUST DWORD +#else +#define CLUST WORD +#endif + + +/* File system object structure */ + +typedef struct _FATFS_ { + BYTE fs_type; /* FAT sub type */ + BYTE csize; /* Number of sectors per cluster */ + BYTE flag; /* File status flags */ + BYTE csect; /* File sector address in the cluster */ + WORD n_rootdir; /* Number of root directory entries (0 on FAT32) */ + BYTE* buf; /* Pointer to the disk access buffer */ + CLUST max_clust; /* Maximum cluster# + 1. Number of clusters is max_clust - 2 */ + DWORD fatbase; /* FAT start sector */ + DWORD dirbase; /* Root directory start sector (Cluster# on FAT32) */ + DWORD database; /* Data start sector */ + DWORD fptr; /* File R/W pointer */ + DWORD fsize; /* File size */ + CLUST org_clust; /* File start cluster */ + CLUST curr_clust; /* File current cluster */ + DWORD dsect; /* File current data sector */ +} FATFS; + + + +/* Directory object structure */ + +typedef struct _DIR_ { + WORD index; /* Current read/write index number */ + BYTE* fn; /* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */ + CLUST sclust; /* Table start cluster (0:Static table) */ + CLUST clust; /* Current cluster */ + DWORD sect; /* Current sector */ +} DIR; + + + +/* File status structure */ + +typedef struct _FILINFO_ { + DWORD fsize; /* File size */ + WORD fdate; /* Last modified date */ + WORD ftime; /* Last modified time */ + BYTE fattrib; /* Attribute */ + char fname[13]; /* File name */ +} FILINFO; + + + +/* File function return code (FRESULT) */ + +typedef enum { + FR_OK = 0, /* 0 */ + FR_DISK_ERR, /* 1 */ + FR_NOT_READY, /* 2 */ + FR_NO_FILE, /* 3 */ + FR_NO_PATH, /* 4 */ + FR_INVALID_NAME, /* 5 */ + FR_STREAM_ERR, /* 6 */ + FR_INVALID_OBJECT, /* 7 */ + FR_NOT_ENABLED, /* 8 */ + FR_NO_FILESYSTEM /* 9 */ +} FRESULT; + + + +/*--------------------------------------------------------------*/ +/* Petit FatFs module application interface */ + +FRESULT pf_mount (FATFS*); /* Mount/Unmount a logical drive */ +FRESULT pf_open (const char*); /* Open a file */ +FRESULT pf_read (void*, WORD, WORD*); /* Read data from a file */ +FRESULT pf_lseek (DWORD); /* Move file pointer of a file object */ +FRESULT pf_opendir (DIR*, const char*); /* Open an existing directory */ +FRESULT pf_readdir (DIR*, FILINFO*); /* Read a directory item */ + + + +/*--------------------------------------------------------------*/ +/* Flags and offset address */ + +/* File status flag (FATFS.flag) */ + +#define FA_READ 0x01 +#define FA_STREAM 0x40 +#define FA__ERROR 0x80 + + +/* FAT sub type (FATFS.fs_type) */ + +#define FS_FAT12 1 +#define FS_FAT16 2 +#define FS_FAT32 3 + + +/* File attribute bits for directory entry */ + +#define AM_RDO 0x01 /* Read only */ +#define AM_HID 0x02 /* Hidden */ +#define AM_SYS 0x04 /* System */ +#define AM_VOL 0x08 /* Volume label */ +#define AM_LFN 0x0F /* LFN entry */ +#define AM_DIR 0x10 /* Directory */ +#define AM_ARC 0x20 /* Archive */ +#define AM_MASK 0x3F /* Mask of defined bits */ + + +/* FatFs refers the members in the FAT structures with byte offset instead +/ of structure member because there are incompatibility of the packing option +/ between various compilers. */ + +#define BS_jmpBoot 0 +#define BS_OEMName 3 +#define BPB_BytsPerSec 11 +#define BPB_SecPerClus 13 +#define BPB_RsvdSecCnt 14 +#define BPB_NumFATs 16 +#define BPB_RootEntCnt 17 +#define BPB_TotSec16 19 +#define BPB_Media 21 +#define BPB_FATSz16 22 +#define BPB_SecPerTrk 24 +#define BPB_NumHeads 26 +#define BPB_HiddSec 28 +#define BPB_TotSec32 32 +#define BS_55AA 510 + +#define BS_DrvNum 36 +#define BS_BootSig 38 +#define BS_VolID 39 +#define BS_VolLab 43 +#define BS_FilSysType 54 + +#define BPB_FATSz32 36 +#define BPB_ExtFlags 40 +#define BPB_FSVer 42 +#define BPB_RootClus 44 +#define BPB_FSInfo 48 +#define BPB_BkBootSec 50 +#define BS_DrvNum32 64 +#define BS_BootSig32 66 +#define BS_VolID32 67 +#define BS_VolLab32 71 +#define BS_FilSysType32 82 + +#define MBR_Table 446 + +#define DIR_Name 0 +#define DIR_Attr 11 +#define DIR_NTres 12 +#define DIR_CrtTime 14 +#define DIR_CrtDate 16 +#define DIR_FstClusHI 20 +#define DIR_WrtTime 22 +#define DIR_WrtDate 24 +#define DIR_FstClusLO 26 +#define DIR_FileSize 28 + + + +/*--------------------------------*/ +/* Multi-byte word access macros */ + +#if _WORD_ACCESS == 1 /* Enable word access to the FAT structure */ +#define LD_WORD(ptr) (WORD)(*(WORD*)(BYTE*)(ptr)) +#define LD_DWORD(ptr) (DWORD)(*(DWORD*)(BYTE*)(ptr)) +#define ST_WORD(ptr,val) *(WORD*)(BYTE*)(ptr)=(WORD)(val) +#define ST_DWORD(ptr,val) *(DWORD*)(BYTE*)(ptr)=(DWORD)(val) +#else /* Use byte-by-byte access to the FAT structure */ +#define LD_WORD(ptr) (WORD)(((WORD)*(BYTE*)((ptr)+1)<<8)|(WORD)*(BYTE*)(ptr)) +#define LD_DWORD(ptr) (DWORD)(((DWORD)*(BYTE*)((ptr)+3)<<24)|((DWORD)*(BYTE*)((ptr)+2)<<16)|((WORD)*(BYTE*)((ptr)+1)<<8)|*(BYTE*)(ptr)) +#define ST_WORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8) +#define ST_DWORD(ptr,val) *(BYTE*)(ptr)=(BYTE)(val); *(BYTE*)((ptr)+1)=(BYTE)((WORD)(val)>>8); *(BYTE*)((ptr)+2)=(BYTE)((DWORD)(val)>>16); *(BYTE*)((ptr)+3)=(BYTE)((DWORD)(val)>>24) +#endif + + +#endif /* _FATFS */ |