diff options
Diffstat (limited to 'external_libs/fat/fatfs/src/ff.c')
| -rw-r--r-- | external_libs/fat/fatfs/src/ff.c | 2042 |
1 files changed, 2042 insertions, 0 deletions
diff --git a/external_libs/fat/fatfs/src/ff.c b/external_libs/fat/fatfs/src/ff.c new file mode 100644 index 0000000..faafaac --- /dev/null +++ b/external_libs/fat/fatfs/src/ff.c @@ -0,0 +1,2042 @@ +/*----------------------------------------------------------------------------/
+/ FatFs - FAT file system module R0.06 (C)ChaN, 2008
+/-----------------------------------------------------------------------------/
+/ The FatFs module is an experimenal project to implement FAT file system to
+/ cheap microcontrollers. This is a free software and is opened for education,
+/ research and development under license policy of following trems.
+/
+/ Copyright (C) 2008, ChaN, all right reserved.
+/
+/ * The FatFs module is a free software and there is no warranty.
+/ * You can use, modify and/or redistribute it for personal, non-profit or
+/ commercial use without restriction under your responsibility.
+/ * Redistributions of source code must retain the above copyright notice.
+/
+/-----------------------------------------------------------------------------/
+/ Feb 26,'06 R0.00 Prototype.
+/
+/ Apr 29,'06 R0.01 First stable version.
+/
+/ Jun 01,'06 R0.02 Added FAT12 support.
+/ Removed unbuffered mode.
+/ Fixed a problem on small (<32M) patition.
+/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
+/
+/ Sep 22,'06 R0.03 Added f_rename().
+/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
+/ Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast.
+/ Fixed f_mkdir() creates incorrect directory on FAT32.
+/
+/ Feb 04,'07 R0.04 Supported multiple drive system.
+/ Changed some interfaces for multiple drive system.
+/ Changed f_mountdrv() to f_mount().
+/ Added f_mkfs().
+/ Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive.
+/ Added a capability of extending file size to f_lseek().
+/ Added minimization level 3.
+/ Fixed an endian sensitive code in f_mkfs().
+/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
+/ Added FSInfo support.
+/ Fixed DBCS name can result FR_INVALID_NAME.
+/ Fixed short seek (<= csize) collapses the file object.
+/
+/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
+/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
+/ Fixed f_mkdir() on FAT32 creates incorrect directory.
+/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
+/ Fixed off by one error at FAT sub-type determination.
+/ Fixed btr in f_read() can be mistruncated.
+/ Fixed cached sector is not flushed when create and close
+/ without write.
+/
+/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
+/ Improved performance of f_lseek() on moving to the same
+/ or following cluster.
+/---------------------------------------------------------------------------*/
+
+#include <fatfs_config.h>
+
+#if _FATFS_TINY != 1
+
+#include <string.h>
+#include "ff.h" /* FatFs declarations */
+#include "diskio.h" /* Include file for user provided disk functions */
+
+
+/*--------------------------------------------------------------------------
+
+ Module Private Functions
+
+---------------------------------------------------------------------------*/
+
+static
+FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
+static
+WORD fsid; /* File system mount ID */
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change window offset */
+/*-----------------------------------------------------------------------*/
+
+static
+BOOL move_window ( /* TRUE: successful, FALSE: failed */
+ FATFS *fs, /* File system object */
+ DWORD sector /* Sector number to make apperance in the fs->win[] */
+) /* Move to zero only writes back dirty window */
+{
+ DWORD wsect;
+
+
+ wsect = fs->winsect;
+ if (wsect != sector) { /* Changed current window */
+#if !_FS_READONLY
+ BYTE n;
+ if (fs->winflag) { /* Write back dirty window if needed */
+ if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
+ return FALSE;
+ fs->winflag = 0;
+ if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */
+ for (n = fs->n_fats; n >= 2; n--) { /* Refrect the change to FAT copy */
+ wsect += fs->sects_fat;
+ disk_write(fs->drive, fs->win, wsect, 1);
+ }
+ }
+ }
+#endif
+ if (sector) {
+ if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK)
+ return FALSE;
+ fs->winsect = sector;
+ }
+ }
+ return TRUE;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Clean-up cached data */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+FRESULT sync ( /* FR_OK: successful, FR_RW_ERROR: failed */
+ FATFS *fs /* File system object */
+)
+{
+ fs->winflag = 1;
+ if (!move_window(fs, 0)) return FR_RW_ERROR;
+#if _USE_FSINFO
+ /* Update FSInfo sector if needed */
+ if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
+ fs->winsect = 0;
+ memset(fs->win, 0, 512);
+ ST_WORD(&fs->win[BS_55AA], 0xAA55);
+ ST_DWORD(&fs->win[FSI_LeadSig], 0x41615252);
+ ST_DWORD(&fs->win[FSI_StrucSig], 0x61417272);
+ ST_DWORD(&fs->win[FSI_Free_Count], fs->free_clust);
+ ST_DWORD(&fs->win[FSI_Nxt_Free], fs->last_clust);
+ disk_write(fs->drive, fs->win, fs->fsi_sector, 1);
+ fs->fsi_flag = 0;
+ }
+#endif
+ /* Make sure that no pending write process in the physical drive */
+ if (disk_ioctl(fs->drive, CTRL_SYNC, NULL) != RES_OK)
+ return FR_RW_ERROR;
+ return FR_OK;
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get a cluster status */
+/*-----------------------------------------------------------------------*/
+
+static
+DWORD get_cluster ( /* 0,>=2: successful, 1: failed */
+ FATFS *fs, /* File system object */
+ DWORD clust /* Cluster# to get the link information */
+)
+{
+ WORD wc, bc;
+ DWORD fatsect;
+
+
+ if (clust >= 2 && clust < fs->max_clust) { /* Is it a valid cluster#? */
+ fatsect = fs->fatbase;
+ switch (fs->fs_type) {
+ case FS_FAT12 :
+ bc = (WORD)clust * 3 / 2;
+ if (!move_window(fs, fatsect + (bc / SS(fs)))) break;
+ wc = fs->win[bc & (SS(fs) - 1)]; bc++;
+ if (!move_window(fs, fatsect + (bc / SS(fs)))) break;
+ wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
+ return (clust & 1) ? (wc >> 4) : (wc & 0xFFF);
+
+ case FS_FAT16 :
+ if (!move_window(fs, fatsect + (clust / (SS(fs) / 2)))) break;
+ return LD_WORD(&fs->win[((WORD)clust * 2) & (SS(fs) - 1)]);
+
+ case FS_FAT32 :
+ if (!move_window(fs, fatsect + (clust / (SS(fs) / 4)))) break;
+ return LD_DWORD(&fs->win[((WORD)clust * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
+ }
+ }
+
+ return 1; /* Out of cluster range, or an error occured */
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change a cluster status */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+BOOL put_cluster ( /* TRUE: successful, FALSE: failed */
+ FATFS *fs, /* File system object */
+ DWORD clust, /* Cluster# to change (must be 2 to fs->max_clust-1) */
+ DWORD val /* New value to mark the cluster */
+)
+{
+ WORD bc;
+ BYTE *p;
+ DWORD fatsect;
+
+
+ fatsect = fs->fatbase;
+ switch (fs->fs_type) {
+ case FS_FAT12 :
+ bc = (WORD)clust * 3 / 2;
+ if (!move_window(fs, fatsect + (bc / SS(fs)))) return FALSE;
+ p = &fs->win[bc & (SS(fs) - 1)];
+ *p = (clust & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
+ bc++;
+ fs->winflag = 1;
+ if (!move_window(fs, fatsect + (bc / SS(fs)))) return FALSE;
+ p = &fs->win[bc & (SS(fs) - 1)];
+ *p = (clust & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
+ break;
+
+ case FS_FAT16 :
+ if (!move_window(fs, fatsect + (clust / (SS(fs) / 2)))) return FALSE;
+ ST_WORD(&fs->win[((WORD)clust * 2) & (SS(fs) - 1)], (WORD)val);
+ break;
+
+ case FS_FAT32 :
+ if (!move_window(fs, fatsect + (clust / (SS(fs) / 4)))) return FALSE;
+ ST_DWORD(&fs->win[((WORD)clust * 4) & (SS(fs) - 1)], val);
+ break;
+
+ default :
+ return FALSE;
+ }
+ fs->winflag = 1;
+ return TRUE;
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Remove a cluster chain */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+BOOL remove_chain ( /* TRUE: successful, FALSE: failed */
+ FATFS *fs, /* File system object */
+ DWORD clust /* Cluster# to remove chain from */
+)
+{
+ DWORD nxt;
+
+
+ while (clust >= 2 && clust < fs->max_clust) {
+ nxt = get_cluster(fs, clust);
+ if (nxt == 1) return FALSE;
+ if (!put_cluster(fs, clust, 0)) return FALSE;
+ if (fs->free_clust != 0xFFFFFFFF) {
+ fs->free_clust++;
+#if _USE_FSINFO
+ fs->fsi_flag = 1;
+#endif
+ }
+ clust = nxt;
+ }
+ return TRUE;
+}
+#endif
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Stretch or create a cluster chain */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+DWORD create_chain ( /* 0: No free cluster, 1: Error, >=2: New cluster number */
+ FATFS *fs, /* File system object */
+ DWORD clust /* Cluster# to stretch, 0 means create new */
+)
+{
+ DWORD cstat, ncl, scl, mcl = fs->max_clust;
+
+
+ if (clust == 0) { /* Create new chain */
+ scl = fs->last_clust; /* Get suggested start point */
+ if (scl == 0 || scl >= mcl) scl = 1;
+ }
+ else { /* Stretch existing chain */
+ cstat = get_cluster(fs, clust); /* Check the cluster status */
+ if (cstat < 2) return 1; /* It is an invalid cluster */
+ if (cstat < mcl) return cstat; /* It is already followed by next cluster */
+ scl = clust;
+ }
+
+ ncl = scl; /* Start cluster */
+ for (;;) {
+ ncl++; /* Next cluster */
+ if (ncl >= mcl) { /* Wrap around */
+ ncl = 2;
+ if (ncl > scl) return 0; /* No free custer */
+ }
+ cstat = get_cluster(fs, ncl); /* Get the cluster status */
+ if (cstat == 0) break; /* Found a free cluster */
+ if (cstat == 1) return 1; /* Any error occured */
+ if (ncl == scl) return 0; /* No free custer */
+ }
+
+ if (!put_cluster(fs, ncl, 0x0FFFFFFF)) return 1; /* Mark the new cluster "in use" */
+ if (clust != 0 && !put_cluster(fs, clust, ncl)) return 1; /* Link it to previous one if needed */
+
+ fs->last_clust = ncl; /* Update fsinfo */
+ if (fs->free_clust != 0xFFFFFFFF) {
+ fs->free_clust--;
+#if _USE_FSINFO
+ fs->fsi_flag = 1;
+#endif
+ }
+
+ return ncl; /* Return new cluster number */
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get sector# from cluster# */
+/*-----------------------------------------------------------------------*/
+
+static
+DWORD clust2sect ( /* !=0: sector number, 0: failed - invalid cluster# */
+ FATFS *fs, /* File system object */
+ DWORD clust /* Cluster# to be converted */
+)
+{
+ clust -= 2;
+ if (clust >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
+ return clust * fs->csize + fs->database;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Move directory pointer to next */
+/*-----------------------------------------------------------------------*/
+
+static
+BOOL next_dir_entry ( /* TRUE: successful, FALSE: could not move next */
+ DIR *dj /* Pointer to directory object */
+)
+{
+ DWORD clust;
+ WORD idx;
+
+
+ idx = dj->index + 1;
+ if ((idx & ((SS(dj->fs) - 1) / 32)) == 0) { /* Table sector changed? */
+ dj->sect++; /* Next sector */
+ if (dj->clust == 0) { /* In static table */
+ if (idx >= dj->fs->n_rootdir) return FALSE; /* Reached to end of table */
+ } else { /* In dynamic table */
+ if (((idx / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
+ clust = get_cluster(dj->fs, dj->clust); /* Get next cluster */
+ if (clust < 2 || clust >= dj->fs->max_clust) /* Reached to end of table */
+ return FALSE;
+ dj->clust = clust; /* Initialize for new cluster */
+ dj->sect = clust2sect(dj->fs, clust);
+ }
+ }
+ }
+ dj->index = idx; /* Lower several bits of dj->index indicates offset in dj->sect */
+ return TRUE;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get file status from directory entry */
+/*-----------------------------------------------------------------------*/
+
+#if _FS_MINIMIZE <= 1
+static
+void get_fileinfo ( /* No return code */
+ FILINFO *finfo, /* Ptr to store the file information */
+ const BYTE *dir /* Ptr to the directory entry */
+)
+{
+ BYTE n, c, a;
+ char *p;
+
+
+ p = &finfo->fname[0];
+ a = _USE_NTFLAG ? dir[DIR_NTres] : 0; /* NT flag */
+ for (n = 0; n < 8; n++) { /* Convert file name (body) */
+ c = dir[n];
+ if (c == ' ') break;
+ if (c == 0x05) c = 0xE5;
+ if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20;
+ *p++ = c;
+ }
+ if (dir[8] != ' ') { /* Convert file name (extension) */
+ *p++ = '.';
+ for (n = 8; n < 11; n++) {
+ c = dir[n];
+ if (c == ' ') break;
+ if (a & 0x10 && c >= 'A' && c <= 'Z') c += 0x20;
+ *p++ = c;
+ }
+ }
+ *p = '\0';
+
+ finfo->fattrib = dir[DIR_Attr]; /* Attribute */
+ finfo->fsize = LD_DWORD(&dir[DIR_FileSize]); /* Size */
+ finfo->fdate = LD_WORD(&dir[DIR_WrtDate]); /* Date */
+ finfo->ftime = LD_WORD(&dir[DIR_WrtTime]); /* Time */
+}
+#endif /* _FS_MINIMIZE <= 1 */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Pick a paragraph and create the name in format of directory entry */
+/*-----------------------------------------------------------------------*/
+
+static
+char make_dirfile ( /* 1: error - detected an invalid format, '\0'or'/': next character */
+ const char **path, /* Pointer to the file path pointer */
+ char *dirname /* Pointer to directory name buffer {Name(8), Ext(3), NT flag(1)} */
+)
+{
+ BYTE n, t, c, a, b;
+
+
+ memset(dirname, ' ', 8+3); /* Fill buffer with spaces */
+ a = 0; b = 0x18; /* NT flag */
+ n = 0; t = 8;
+ for (;;) {
+ c = *(*path)++;
+ if (c == '\0' || c == '/') { /* Reached to end of str or directory separator */
+ if (n == 0) break;
+ dirname[11] = _USE_NTFLAG ? (a & b) : 0;
+ return c;
+ }
+ if (c <= ' ' || c == 0x7F) break; /* Reject invisible chars */
+ if (c == '.') {
+ if (!(a & 1) && n >= 1 && n <= 8) { /* Enter extension part */
+ n = 8; t = 11; continue;
+ }
+ break;
+ }
+ if (_USE_SJIS &&
+ ((c >= 0x81 && c <= 0x9F) || /* Accept S-JIS code */
+ (c >= 0xE0 && c <= 0xFC))) {
+ if (n == 0 && c == 0xE5) /* Change heading \xE5 to \x05 */
+ c = 0x05;
+ a ^= 0x01; goto md_l2;
+ }
+ if (c == '"') break; /* Reject " */
+ if (c <= ')') goto md_l1; /* Accept ! # $ % & ' ( ) */
+ if (c <= ',') break; /* Reject * + , */
+ if (c <= '9') goto md_l1; /* Accept - 0-9 */
+ if (c <= '?') break; /* Reject : ; < = > ? */
+ if (!(a & 1)) { /* These checks are not applied to S-JIS 2nd byte */
+ if (c == '|') break; /* Reject | */
+ if (c >= '[' && c <= ']') break;/* Reject [ \ ] */
+ if (_USE_NTFLAG && c >= 'A' && c <= 'Z')
+ (t == 8) ? (b &= 0xF7) : (b &= 0xEF);
+ if (c >= 'a' && c <= 'z') { /* Convert to upper case */
+ c -= 0x20;
+ if (_USE_NTFLAG) (t == 8) ? (a |= 0x08) : (a |= 0x10);
+ }
+ }
+ md_l1:
+ a &= 0xFE;
+ md_l2:
+ if (n >= t) break;
+ dirname[n++] = c;
+ }
+ return 1;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Trace a file path */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT trace_path ( /* FR_OK(0): successful, !=0: error code */
+ DIR *dj, /* Pointer to directory object to return last directory */
+ char *fn, /* Pointer to last segment name to return {file(8),ext(3),attr(1)} */
+ const char *path, /* Full-path string to trace a file or directory */
+ BYTE **dir /* Pointer to pointer to found entry to retutn */
+)
+{
+ DWORD clust;
+ char ds;
+ BYTE *dptr = NULL;
+ FATFS *fs = dj->fs;
+
+
+ /* Initialize directory object */
+ clust = fs->dirbase;
+ if (fs->fs_type == FS_FAT32) {
+ dj->clust = dj->sclust = clust;
+ dj->sect = clust2sect(fs, clust);
+ } else {
+ dj->clust = dj->sclust = 0;
+ dj->sect = clust;
+ }
+ dj->index = 0;
+
+ if (*path == '\0') { /* Null path means the root directory */
+ *dir = NULL; return FR_OK;
+ }
+
+ for (;;) {
+ ds = make_dirfile(&path, fn); /* Get a paragraph into fn[] */
+ if (ds == 1) return FR_INVALID_NAME;
+ for (;;) {
+ if (!move_window(fs, dj->sect)) return FR_RW_ERROR;
+ dptr = &fs->win[(dj->index & ((SS(fs) - 1) / 32)) * 32]; /* Pointer to the directory entry */
+ if (dptr[DIR_Name] == 0) /* Has it reached to end of dir? */
+ return !ds ? FR_NO_FILE : FR_NO_PATH;
+ if (dptr[DIR_Name] != 0xE5 /* Matched? */
+ && !(dptr[DIR_Attr] & AM_VOL)
+ && !memcmp(&dptr[DIR_Name], fn, 8+3) ) break;
+ if (!next_dir_entry(dj)) /* Next directory pointer */
+ return !ds ? FR_NO_FILE : FR_NO_PATH;
+ }
+ if (!ds) { *dir = dptr; return FR_OK; } /* Matched with end of path */
+ if (!(dptr[DIR_Attr] & AM_DIR)) return FR_NO_PATH; /* Cannot trace because it is a file */
+ clust = ((DWORD)LD_WORD(&dptr[DIR_FstClusHI]) << 16) | LD_WORD(&dptr[DIR_FstClusLO]); /* Get cluster# of the directory */
+ dj->clust = dj->sclust = clust; /* Restart scanning at the new directory */
+ dj->sect = clust2sect(fs, clust);
+ dj->index = 2;
+ }
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Reserve a directory entry */
+/*-----------------------------------------------------------------------*/
+
+#if !_FS_READONLY
+static
+FRESULT reserve_direntry ( /* FR_OK: successful, FR_DENIED: no free entry, FR_RW_ERROR: a disk error occured */
+ DIR *dj, /* Target directory to create new entry */
+ BYTE **dir /* Pointer to pointer to created entry to retutn */
+)
+{
+ DWORD clust, sector;
+ BYTE c, n, *dptr;
+ FATFS *fs = dj->fs;
+
+
+ /* Re-initialize directory object */
+ clust = dj->sclust;
+ if (clust != 0) { /* Dyanmic directory table */
+ dj->clust = clust;
+ dj->sect = clust2sect(fs, clust);
+ } else { /* Static directory table */
+ dj->sect = fs->dirbase;
+ }
+ dj->index = 0;
+
+ do {
+ if (!move_window(fs, dj->sect)) return FR_RW_ERROR;
+ dptr = &fs->win[(dj->index & ((SS(dj->fs) - 1) / 32)) * 32]; /* Pointer to the directory entry */
+ c = dptr[DIR_Name];
+ if (c == 0 || c == 0xE5) { /* Found an empty entry */
+ *dir = dptr; return FR_OK;
+ }
+ } while (next_dir_entry(dj)); /* Next directory pointer */
+ /* Reached to end of the directory table */
+
+ /* Abort when it is a static table or could not stretch dynamic table */
+ if (clust == 0 || !(clust = create_chain(fs, dj->clust))) return FR_DENIED;
+ if (clust == 1 || !move_window(fs, 0)) return FR_RW_ERROR;
+
+ /* Cleanup the expanded table */
+ fs->winsect = sector = clust2sect(fs, clust);
+ memset(fs->win, 0, SS(fs));
+ for (n = fs->csize; n; n--) {
+ if (disk_write(fs->drive, fs->win, sector, 1) != RES_OK)
+ return FR_RW_ERROR;
+ sector++;
+ }
+ fs->winflag = 1;
+ *dir = fs->win;
+
+ return FR_OK;
+}
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Load boot record and check 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 or error */
+ FATFS *fs, /* File system object */
+ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
+)
+{
+ if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */
+ return 2;
+ if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
+ return 2;
+
+ if (!memcmp(&fs->win[BS_FilSysType], "FAT", 3)) /* Check FAT signature */
+ return 0;
+ if (!memcmp(&fs->win[BS_FilSysType32], "FAT32", 5) && !(fs->win[BPB_ExtFlags] & 0x80))
+ return 0;
+
+ return 1;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Make sure that the file system is valid */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT auto_mount ( /* FR_OK(0): successful, !=0: any error occured */
+ const char **path, /* Pointer to pointer to the path name (drive number) */
+ FATFS **rfs, /* Pointer to pointer to the found file system object */
+ BYTE chk_wp /* !=0: Check media write protection for write access */
+)
+{
+ BYTE drv, fmt, *tbl;
+ DSTATUS stat;
+ DWORD bootsect, fatsize, totalsect, maxclust;
+ const char *p = *path;
+ FATFS *fs;
+
+
+ /* Get drive number from the path name */
+ while (*p == ' ') p++; /* Strip leading spaces */
+ drv = p[0] - '0'; /* Is there a drive number? */
+ if (drv <= 9 && p[1] == ':')
+ p += 2; /* Found a drive number, get and strip it */
+ else
+ drv = 0; /* No drive number is given, use drive number 0 as default */
+ if (*p == '/') p++; /* Strip heading slash */
+ *path = p; /* Return pointer to the path name */
+
+ /* Check if the drive number is valid or not */
+ if (drv >= _DRIVES) return FR_INVALID_DRIVE; /* Is the drive number valid? */
+ *rfs = fs = FatFs[drv]; /* Returen pointer to the corresponding file system object */
+ if (!fs) return FR_NOT_ENABLED; /* Is the file system object registered? */
+
+ if (fs->fs_type) { /* If the logical drive has been mounted */
+ stat = disk_status(fs->drive);
+ if (!(stat & STA_NOINIT)) { /* and physical drive is kept initialized (has not been changed), */
+#if !_FS_READONLY
+ if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
+ return FR_WRITE_PROTECTED;
+#endif
+ return FR_OK; /* The file system object is valid */
+ }
+ }
+
+ /* The logical drive must be re-mounted. Following code attempts to mount the logical drive */
+
+ memset(fs, 0, sizeof(FATFS)); /* Clean-up the file system object */
+ fs->drive = LD2PD(drv); /* Bind the logical drive and a physical drive */
+ stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */
+ if (stat & STA_NOINIT) /* Check if the drive is ready */
+ return FR_NOT_READY;
+#if S_MAX_SIZ > 512 /* Get disk sector size if needed */
+ if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > S_MAX_SIZ)
+ return FR_NO_FILESYSTEM;
+#endif
+#if !_FS_READONLY
+ if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
+ return FR_WRITE_PROTECTED;
+#endif
+ /* Search FAT partition on the drive */
+ fmt = check_fs(fs, bootsect = 0); /* Check sector 0 as an SFD format */
+ if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */
+ /* Check a partition listed in top of the partition table */
+ tbl = &fs->win[MBR_Table + LD2PT(drv) * 16]; /* Partition table */
+ if (tbl[4]) { /* Is the partition existing? */
+ bootsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
+ fmt = check_fs(fs, bootsect); /* Check the partition */
+ }
+ }
+ if (fmt || LD_WORD(&fs->win[BPB_BytsPerSec]) != SS(fs)) /* No valid FAT patition is found */
+ return FR_NO_FILESYSTEM;
+
+ /* Initialize the file system object */
+ fatsize = LD_WORD(&fs->win[BPB_FATSz16]); /* Number of sectors per FAT */
+ if (!fatsize) fatsize = LD_DWORD(&fs->win[BPB_FATSz32]);
+ fs->sects_fat = fatsize;
+ fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
+ fatsize *= fs->n_fats; /* (Number of sectors in FAT area) */
+ fs->fatbase = bootsect + LD_WORD(&fs->win[BPB_RsvdSecCnt]); /* FAT start sector (lba) */
+ fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
+ fs->n_rootdir = LD_WORD(&fs->win[BPB_RootEntCnt]); /* Nmuber of root directory entries */
+ totalsect = LD_WORD(&fs->win[BPB_TotSec16]); /* Number of sectors on the file system */
+ if (!totalsect) totalsect = LD_DWORD(&fs->win[BPB_TotSec32]);
+ fs->max_clust = maxclust = (totalsect /* max_clust = Last cluster# + 1 */
+ - LD_WORD(&fs->win[BPB_RsvdSecCnt]) - fatsize - fs->n_rootdir / (SS(fs)/32)
+ ) / fs->csize + 2;
+
+ fmt = FS_FAT12; /* Determine the FAT sub type */
+ if (maxclust >= 0xFF7) fmt = FS_FAT16;
+ if (maxclust >= 0xFFF7) fmt = FS_FAT32;
+
+ if (fmt == FS_FAT32)
+ fs->dirbase = LD_DWORD(&fs->win[BPB_RootClus]); /* Root directory start cluster */
+ else
+ fs->dirbase = fs->fatbase + fatsize; /* Root directory start sector (lba) */
+ fs->database = fs->fatbase + fatsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */
+
+#if !_FS_READONLY
+ /* Initialize allocation information */
+ fs->free_clust = 0xFFFFFFFF;
+#if _USE_FSINFO
+ /* Get fsinfo if needed */
+ if (fmt == FS_FAT32) {
+ fs->fsi_sector = bootsect + LD_WORD(&fs->win[BPB_FSInfo]);
+ if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
+ LD_WORD(&fs->win[BS_55AA]) == 0xAA55 &&
+ LD_DWORD(&fs->win[FSI_LeadSig]) == 0x41615252 &&
+ LD_DWORD(&fs->win[FSI_StrucSig]) == 0x61417272) {
+ fs->last_clust = LD_DWORD(&fs->win[FSI_Nxt_Free]);
+ fs->free_clust = LD_DWORD(&fs->win[FSI_Free_Count]);
+ }
+ }
+#endif
+#endif
+
+ fs->fs_type = fmt; /* FAT syb-type */
+ fs->id = ++fsid; /* File system mount ID */
+ return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Check if the file/dir object is valid or not */
+/*-----------------------------------------------------------------------*/
+
+static
+FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
+ const FATFS *fs, /* Pointer to the file system object */
+ WORD id /* Member id of the target object to be checked */
+)
+{
+ if (!fs || !fs->fs_type || fs->id != id)
+ return FR_INVALID_OBJECT;
+ if (disk_status(fs->drive) & STA_NOINIT)
+ return FR_NOT_READY;
+
+ return FR_OK;
+}
+
+
+
+
+/*--------------------------------------------------------------------------
+
+ Public Functions
+
+--------------------------------------------------------------------------*/
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Mount/Unmount a Locical Drive */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_mount (
+ BYTE drv, /* Logical drive number to be mounted/unmounted */
+ FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
+)
+{
+ if (drv >= _DRIVES) return FR_INVALID_DRIVE;
+
+ if (FatFs[drv]) FatFs[drv]->fs_type = 0; /* Clear old object */
+
+ FatFs[drv] = fs; /* Register and clear new object */
+ if (fs) fs->fs_type = 0;
+
+ return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Open or Create a File */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_open (
+ FIL *fp, /* Pointer to the blank file object */
+ const char *path, /* Pointer to the file name */
+ BYTE mode /* Access mode and file open mode flags */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir;
+ char fn[8+3+1];
+
+
+ fp->fs = NULL; /* Clear file object */
+#if !_FS_READONLY
+ mode &= (FA_READ|FA_WRITE|FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW);
+ res = auto_mount(&path, &dj.fs, (BYTE)(mode & (FA_WRITE|FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW)));
+#else
+ mode &= FA_READ;
+ res = auto_mount(&path, &dj.fs, 0);
+#endif
+ if (res != FR_OK) return res;
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+
+#if !_FS_READONLY
+ /* Create or Open a file */
+ if (mode & (FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW)) {
+ DWORD ps, rs;
+ if (res != FR_OK) { /* No file, create new */
+ if (res != FR_NO_FILE) return res;
+ res = reserve_direntry(&dj, &dir);
+ if (res != FR_OK) return res;
+ memset(dir, 0, 32); /* Initialize the new entry with open name */
+ memcpy(&dir[DIR_Name], fn, 8+3);
+ dir[DIR_NTres] = fn[11];
+ mode |= FA_CREATE_ALWAYS;
+ }
+ else { /* Any object is already existing */
+ if (mode & FA_CREATE_NEW) /* Cannot create new */
+ return FR_EXIST;
+ if (!dir || (dir[DIR_Attr] & (AM_RDO|AM_DIR))) /* Cannot overwrite it (R/O or DIR) */
+ return FR_DENIED;
+ if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero if needed */
+ rs = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]); /* Get start cluster */
+ ST_WORD(&dir[DIR_FstClusHI], 0); /* cluster = 0 */
+ ST_WORD(&dir[DIR_FstClusLO], 0);
+ ST_DWORD(&dir[DIR_FileSize], 0); /* size = 0 */
+ dj.fs->winflag = 1;
+ ps = dj.fs->winsect; /* Remove the cluster chain */
+ if (!remove_chain(dj.fs, rs) || !move_window(dj.fs, ps))
+ return FR_RW_ERROR;
+ dj.fs->last_clust = rs - 1; /* Reuse the cluster hole */
+ }
+ }
+ if (mode & FA_CREATE_ALWAYS) {
+ dir[DIR_Attr] = 0; /* Reset attribute */
+ ps = get_fattime();
+ ST_DWORD(&dir[DIR_CrtTime], ps); /* Created time */
+ dj.fs->winflag = 1;
+ mode |= FA__WRITTEN; /* Set file changed flag */
+ }
+ }
+ /* Open an existing file */
+ else {
+#endif /* !_FS_READONLY */
+ if (res != FR_OK) return res; /* Trace failed */
+ if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
+ return FR_NO_FILE;
+#if !_FS_READONLY
+ if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
+ return FR_DENIED;
+ }
+ fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
+ fp->dir_ptr = dir;
+#endif
+ fp->flag = mode; /* File access mode */
+ fp->org_clust = /* File start cluster */
+ ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]);
+ fp->fsize = LD_DWORD(&dir[DIR_FileSize]); /* File size */
+ fp->fptr = 0; fp->csect = 255; /* File pointer */
+ fp->curr_sect = 0;
+ fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
+
+ return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read File */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_read (
+ FIL *fp, /* Pointer to the file object */
+ void *buff, /* Pointer to data buffer */
+ UINT btr, /* Number of bytes to read */
+ UINT *br /* Pointer to number of bytes read */
+)
+{
+ FRESULT res;
+ DWORD clust, sect, remain;
+ UINT rcnt, cc;
+ BYTE *rbuff = buff;
+
+
+ *br = 0;
+ res = validate(fp->fs, fp->id); /* Check validity of the object */
+ if (res != FR_OK) return res;
+ if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */
+ if (!(fp->flag & FA_READ)) return FR_DENIED; /* Check access mode */
+ remain = fp->fsize - fp->fptr;
+ if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
+
+ for ( ; btr; /* Repeat until all data transferred */
+ rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
+ if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
+ if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
+ clust = (fp->fptr == 0) ? /* On the top of the file? */
+ fp->org_clust : get_cluster(fp->fs, fp->curr_clust);
+ if (clust < 2 || clust >= fp->fs->max_clust) goto fr_error;
+ fp->curr_clust = clust; /* Update current cluster */
+ fp->csect = 0; /* Reset sector address in the cluster */
+ }
+ sect = clust2sect(fp->fs, fp->curr_clust) + fp->csect; /* Get current sector */
+ cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
+ if (cc) { /* Read maximum contiguous sectors directly */
+ if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
+ cc = fp->fs->csize - fp->csect;
+ if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK)
+ goto fr_error;
+ fp->csect += (BYTE)cc; /* Next sector address in the cluster */
+ rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
+ continue;
+ }
+ if (sect != fp->curr_sect) { /* Is window offset changed? */
+#if !_FS_READONLY
+ if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer if needed */
+ if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
+ goto fr_error;
+ fp->flag &= (BYTE)~FA__DIRTY;
+ }
+#endif
+ if (disk_read(fp->fs->drive, fp->buffer, sect, 1) != RES_OK) /* Fill file I/O buffer with file data */
+ goto fr_error;
+ fp->curr_sect = sect;
+ }
+ fp->csect++; /* Next sector address in the cluster */
+ }
+ rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector from file I/O buffer */
+ if (rcnt > btr) rcnt = btr;
+ memcpy(rbuff, &fp->buffer[fp->fptr % SS(fp->fs)], rcnt);
+ }
+
+ return FR_OK;
+
+fr_error: /* Abort this file due to an unrecoverable error */
+ fp->flag |= FA__ERROR;
+ return FR_RW_ERROR;
+}
+
+
+
+
+#if !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Write File */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_write (
+ FIL *fp, /* Pointer to the file object */
+ const void *buff, /* Pointer to the data to be written */
+ UINT btw, /* Number of bytes to write */
+ UINT *bw /* Pointer to number of bytes written */
+)
+{
+ FRESULT res;
+ DWORD clust, sect;
+ UINT wcnt, cc;
+ const BYTE *wbuff = buff;
+
+
+ *bw = 0;
+ res = validate(fp->fs, fp->id); /* Check validity of the object */
+ if (res != FR_OK) return res;
+ if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */
+ if (!(fp->flag & FA_WRITE)) return FR_DENIED; /* Check access mode */
+ if (fp->fsize + btw < fp->fsize) return FR_OK; /* File size cannot reach 4GB */
+
+ for ( ; btw; /* Repeat until all data transferred */
+ wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
+ if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
+ if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
+ if (fp->fptr == 0) { /* On the top of the file? */
+ clust = fp->org_clust; /* Follow from the origin */
+ if (clust == 0) /* When there is no cluster chain, */
+ fp->org_clust = clust = create_chain(fp->fs, 0); /* Create a new cluster chain */
+ } else { /* Middle or end of the file */
+ clust = create_chain(fp->fs, fp->curr_clust); /* Trace or streach cluster chain */
+ }
+ if (clust == 0) break; /* Could not allocate a new cluster (disk full) */
+ if (clust == 1 || clust >= fp->fs->max_clust) goto fw_error;
+ fp->curr_clust = clust; /* Update current cluster */
+ fp->csect = 0; /* Reset sector address in the cluster */
+ }
+ sect = clust2sect(fp->fs, fp->curr_clust) + fp->csect; /* Get current sector */
+ cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
+ if (cc) { /* Write maximum contiguous sectors directly */
+ if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
+ cc = fp->fs->csize - fp->csect;
+ if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK)
+ goto fw_error;
+ fp->csect += (BYTE)cc; /* Next sector address in the cluster */
+ wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
+ continue;
+ }
+ if (sect != fp->curr_sect) { /* Is window offset changed? */
+ if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer if needed */
+ if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
+ goto fw_error;
+ fp->flag &= (BYTE)~FA__DIRTY;
+ }
+ if (fp->fptr < fp->fsize && /* Fill file I/O buffer with file data */
+ disk_read(fp->fs->drive, fp->buffer, sect, 1) != RES_OK)
+ goto fw_error;
+ fp->curr_sect = sect;
+ }
+ fp->csect++; /* Next sector address in the cluster */
+ }
+ wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
+ if (wcnt > btw) wcnt = btw;
+ memcpy(&fp->buffer[fp->fptr % SS(fp->fs)], wbuff, wcnt);
+ fp->flag |= FA__DIRTY;
+ }
+
+ if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
+ fp->flag |= FA__WRITTEN; /* Set file changed flag */
+ return FR_OK;
+
+fw_error: /* Abort this file due to an unrecoverable error */
+ fp->flag |= FA__ERROR;
+ return FR_RW_ERROR;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Synchronize the file object */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_sync (
+ FIL *fp /* Pointer to the file object */
+)
+{
+ FRESULT res;
+ DWORD tim;
+ BYTE *dir;
+
+
+ res = validate(fp->fs, fp->id); /* Check validity of the object */
+ if (res == FR_OK) {
+ if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
+ /* Write back data buffer if needed */
+ if (fp->flag & FA__DIRTY) {
+ if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
+ return FR_RW_ERROR;
+ fp->flag &= (BYTE)~FA__DIRTY;
+ }
+ /* Update the directory entry */
+ if (!move_window(fp->fs, fp->dir_sect))
+ return FR_RW_ERROR;
+ dir = fp->dir_ptr;
+ dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
+ ST_DWORD(&dir[DIR_FileSize], fp->fsize); /* Update file size */
+ ST_WORD(&dir[DIR_FstClusLO], fp->org_clust); /* Update start cluster */
+ ST_WORD(&dir[DIR_FstClusHI], fp->org_clust >> 16);
+ tim = get_fattime(); /* Updated time */
+ ST_DWORD(&dir[DIR_WrtTime], tim);
+ fp->flag &= (BYTE)~FA__WRITTEN;
+ res = sync(fp->fs);
+ }
+ }
+ return res;
+}
+
+#endif /* !_FS_READONLY */
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Close File */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_close (
+ FIL *fp /* Pointer to the file object to be closed */
+)
+{
+ FRESULT res;
+
+
+#if !_FS_READONLY
+ res = f_sync(fp);
+#else
+ res = validate(fp->fs, fp->id);
+#endif
+ if (res == FR_OK) fp->fs = NULL;
+ return res;
+}
+
+
+
+
+#if _FS_MINIMIZE <= 2
+/*-----------------------------------------------------------------------*/
+/* Seek File R/W Pointer */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_lseek (
+ FIL *fp, /* Pointer to the file object */
+ DWORD ofs /* File pointer from top of file */
+)
+{
+ FRESULT res;
+ DWORD clust, csize, nsect, ifptr;
+
+
+ res = validate(fp->fs, fp->id); /* Check validity of the object */
+ if (res != FR_OK) return res;
+ if (fp->flag & FA__ERROR) return FR_RW_ERROR;
+ if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
+#if !_FS_READONLY
+ && !(fp->flag & FA_WRITE)
+#endif
+ ) ofs = fp->fsize;
+
+ ifptr = fp->fptr;
+ fp->fptr = 0; fp->csect = 255;
+ nsect = 0;
+ if (ofs > 0) {
+ csize = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
+ if (ifptr > 0 &&
+ (ofs - 1) / csize >= (ifptr - 1) / csize) {/* When seek to same or following cluster, */
+ fp->fptr = (ifptr - 1) & ~(csize - 1); /* start from the current cluster */
+ ofs -= fp->fptr;
+ clust = fp->curr_clust;
+ } else { /* When seek to back cluster, */
+ clust = fp->org_clust; /* start from the first cluster */
+#if !_FS_READONLY
+ if (clust == 0) { /* If no cluster chain, create a new chain */
+ clust = create_chain(fp->fs, 0);
+ if (clust == 1) goto fk_error;
+ fp->org_clust = clust;
+ }
+#endif
+ fp->curr_clust = clust;
+ }
+ if (clust != 0) {
+ while (ofs > csize) { /* Cluster following loop */
+#if !_FS_READONLY
+ if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
+ clust = create_chain(fp->fs, clust); /* Force streached if in write mode */
+ if (clust == 0) { /* When disk gets full, clip file size */
+ ofs = csize; break;
+ }
+ } else
+#endif
+ clust = get_cluster(fp->fs, clust); /* Follow cluster chain if not in write mode */
+ if (clust < 2 || clust >= fp->fs->max_clust) goto fk_error;
+ fp->curr_clust = clust;
+ fp->fptr += csize;
+ ofs -= csize;
+ }
+ fp->fptr += ofs;
+ fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */
+ if (ofs & (SS(fp->fs) - 1)) {
+ nsect = clust2sect(fp->fs, clust) + fp->csect; /* Current sector */
+ fp->csect++;
+ }
+ }
+ }
+ if (nsect && nsect != fp->curr_sect) {
+#if !_FS_READONLY
+ if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */
+ if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
+ goto fk_error;
+ fp->flag &= (BYTE)~FA__DIRTY;
+ }
+#endif
+ if (disk_read(fp->fs->drive, fp->buffer, nsect, 1) != RES_OK)
+ goto fk_error;
+ fp->curr_sect = nsect;
+ }
+
+#if !_FS_READONLY
+ if (fp->fptr > fp->fsize) { /* Set changed flag if the file was extended */
+ fp->fsize = fp->fptr;
+ fp->flag |= FA__WRITTEN;
+ }
+#endif
+
+ return FR_OK;
+
+fk_error: /* Abort this file due to an unrecoverable error */
+ fp->flag |= FA__ERROR;
+ return FR_RW_ERROR;
+}
+
+
+
+
+#if _FS_MINIMIZE <= 1
+/*-----------------------------------------------------------------------*/
+/* Create a directroy object */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_opendir (
+ DIR *dj, /* Pointer to directory object to create */
+ const char *path /* Pointer to the directory path */
+)
+{
+ FRESULT res;
+ BYTE *dir;
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path, &dj->fs, 0);
+ if (res == FR_OK) {
+ res = trace_path(dj, fn, path, &dir); /* Trace the directory path */
+ if (res == FR_OK) { /* Trace completed */
+ if (dir) { /* It is not the root dir */
+ if (dir[DIR_Attr] & AM_DIR) { /* The entry is a directory */
+ dj->clust = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]);
+ dj->sect = clust2sect(dj->fs, dj->clust);
+ dj->index = 2;
+ } else { /* The entry is not a directory */
+ res = FR_NO_FILE;
+ }
+ }
+ dj->id = dj->fs->id;
+ }
+ }
+
+ return res;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Directory Entry in Sequense */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_readdir (
+ DIR *dj, /* Pointer to the directory object */
+ FILINFO *finfo /* Pointer to file information to return */
+)
+{
+ BYTE *dir, c, res;
+
+
+ res = validate(dj->fs, dj->id); /* Check validity of the object */
+ if (res != FR_OK) return res;
+
+ finfo->fname[0] = 0;
+ while (dj->sect) {
+ if (!move_window(dj->fs, dj->sect))
+ return FR_RW_ERROR;
+ dir = &dj->fs->win[(dj->index & ((SS(dj->fs) - 1) >> 5)) * 32]; /* pointer to the directory entry */
+ c = dir[DIR_Name];
+ if (c == 0) break; /* Has it reached to end of dir? */
+ if (c != 0xE5 && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
+ get_fileinfo(finfo, dir);
+ if (!next_dir_entry(dj)) dj->sect = 0; /* Next entry */
+ if (finfo->fname[0]) break; /* Found valid entry */
+ }
+
+ return FR_OK;
+}
+
+
+
+
+#if _FS_MINIMIZE == 0
+/*-----------------------------------------------------------------------*/
+/* Get File Status */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_stat (
+ const char *path, /* Pointer to the file path */
+ FILINFO *finfo /* Pointer to file information to return */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir;
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path, &dj.fs, 0);
+ if (res == FR_OK) {
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+ if (res == FR_OK) { /* Trace completed */
+ if (dir) /* Found an object */
+ get_fileinfo(finfo, dir);
+ else /* It is root dir */
+ res = FR_INVALID_NAME;
+ }
+ }
+
+ return res;
+}
+
+
+
+#if !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Truncate File */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_truncate (
+ FIL *fp /* Pointer to the file object */
+)
+{
+ FRESULT res;
+ DWORD ncl;
+
+
+ res = validate(fp->fs, fp->id); /* Check validity of the object */
+ if (res != FR_OK) return res;
+ if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */
+ if (!(fp->flag & FA_WRITE)) return FR_DENIED; /* Check access mode */
+
+ if (fp->fsize > fp->fptr) {
+ fp->fsize = fp->fptr; /* Set file size to current R/W point */
+ fp->flag |= FA__WRITTEN;
+ if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
+ if (!remove_chain(fp->fs, fp->org_clust)) goto ft_error;
+ fp->org_clust = 0;
+ } else { /* When truncate a part of the file, remove remaining clusters */
+ ncl = get_cluster(fp->fs, fp->curr_clust);
+ if (ncl < 2) goto ft_error;
+ if (ncl < fp->fs->max_clust) {
+ if (!put_cluster(fp->fs, fp->curr_clust, 0x0FFFFFFF)) goto ft_error;
+ if (!remove_chain(fp->fs, ncl)) goto ft_error;
+ }
+ }
+ }
+
+ return FR_OK;
+
+ft_error: /* Abort this file due to an unrecoverable error */
+ fp->flag |= FA__ERROR;
+ return FR_RW_ERROR;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get Number of Free Clusters */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_getfree (
+ const char *drv, /* Pointer to the logical drive number (root dir) */
+ DWORD *nclust, /* Pointer to the variable to return number of free clusters */
+ FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
+)
+{
+ FRESULT res;
+ DWORD n, clust, sect;
+ BYTE fat, f, *p;
+
+
+ /* Get drive number */
+ res = auto_mount(&drv, fatfs, 0);
+ if (res != FR_OK) return res;
+
+ /* If number of free cluster is valid, return it without cluster scan. */
+ if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) {
+ *nclust = (*fatfs)->free_clust;
+ return FR_OK;
+ }
+
+ /* Get number of free clusters */
+ fat = (*fatfs)->fs_type;
+ n = 0;
+ if (fat == FS_FAT12) {
+ clust = 2;
+ do {
+ if ((WORD)get_cluster(*fatfs, clust) == 0) n++;
+ } while (++clust < (*fatfs)->max_clust);
+ } else {
+ clust = (*fatfs)->max_clust;
+ sect = (*fatfs)->fatbase;
+ f = 0; p = 0;
+ do {
+ if (!f) {
+ if (!move_window(*fatfs, sect++)) return FR_RW_ERROR;
+ p = (*fatfs)->win;
+ }
+ if (fat == FS_FAT16) {
+ if (LD_WORD(p) == 0) n++;
+ p += 2; f += 1;
+ } else {
+ if (LD_DWORD(p) == 0) n++;
+ p += 4; f += 2;
+ }
+ } while (--clust);
+ }
+ (*fatfs)->free_clust = n;
+#if _USE_FSINFO
+ if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
+#endif
+
+ *nclust = n;
+ return FR_OK;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Delete a File or Directory */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_unlink (
+ const char *path /* Pointer to the file or directory path */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir, *sdir;
+ DWORD dclust, dsect;
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path, &dj.fs, 1);
+ if (res != FR_OK) return res;
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+ if (res != FR_OK) return res; /* Trace failed */
+ if (!dir) return FR_INVALID_NAME; /* It is the root directory */
+ if (dir[DIR_Attr] & AM_RDO) return FR_DENIED; /* It is a R/O object */
+ dsect = dj.fs->winsect;
+ dclust = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]);
+
+ if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
+ dj.clust = dclust; /* Check if the sub-dir is empty or not */
+ dj.sect = clust2sect(dj.fs, dclust);
+ dj.index = 2;
+ do {
+ if (!move_window(dj.fs, dj.sect)) return FR_RW_ERROR;
+ sdir = &dj.fs->win[(dj.index & ((SS(dj.fs) - 1) >> 5)) * 32];
+ if (sdir[DIR_Name] == 0) break;
+ if (sdir[DIR_Name] != 0xE5 && !(sdir[DIR_Attr] & AM_VOL))
+ return FR_DENIED; /* The directory is not empty */
+ } while (next_dir_entry(&dj));
+ }
+
+ if (!move_window(dj.fs, dsect)) return FR_RW_ERROR; /* Mark the directory entry 'deleted' */
+ dir[DIR_Name] = 0xE5;
+ dj.fs->winflag = 1;
+ if (!remove_chain(dj.fs, dclust)) return FR_RW_ERROR; /* Remove the cluster chain */
+
+ return sync(dj.fs);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Create a Directory */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_mkdir (
+ const char *path /* Pointer to the directory path */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir, *fw, n;
+ char fn[8+3+1];
+ DWORD sect, dsect, dclust, pclust, tim;
+
+
+ res = auto_mount(&path, &dj.fs, 1);
+ if (res != FR_OK) return res;
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+ if (res == FR_OK) return FR_EXIST; /* Any file or directory is already existing */
+ if (res != FR_NO_FILE) return res;
+
+ res = reserve_direntry(&dj, &dir); /* Reserve a directory entry */
+ if (res != FR_OK) return res;
+ sect = dj.fs->winsect;
+ dclust = create_chain(dj.fs, 0); /* Allocate a cluster for new directory table */
+ if (dclust == 1) return FR_RW_ERROR;
+ dsect = clust2sect(dj.fs, dclust);
+ if (!dsect) return FR_DENIED;
+ if (!move_window(dj.fs, dsect)) return FR_RW_ERROR;
+
+ fw = dj.fs->win;
+ memset(fw, 0, SS(dj.fs)); /* Clear the new directory table */
+ for (n = 1; n < dj.fs->csize; n++) {
+ if (disk_write(dj.fs->drive, fw, ++dsect, 1) != RES_OK)
+ return FR_RW_ERROR;
+ }
+ memset(&fw[DIR_Name], ' ', 8+3); /* Create "." entry */
+ fw[DIR_Name] = '.';
+ fw[DIR_Attr] = AM_DIR;
+ tim = get_fattime();
+ ST_DWORD(&fw[DIR_WrtTime], tim);
+ memcpy(&fw[32], &fw[0], 32); fw[33] = '.'; /* Create ".." entry */
+ ST_WORD(&fw[ DIR_FstClusLO], dclust);
+ ST_WORD(&fw[ DIR_FstClusHI], dclust >> 16);
+ pclust = dj.sclust;
+ if (dj.fs->fs_type == FS_FAT32 && pclust == dj.fs->dirbase) pclust = 0;
+ ST_WORD(&fw[32+DIR_FstClusLO], pclust);
+ ST_WORD(&fw[32+DIR_FstClusHI], pclust >> 16);
+ dj.fs->winflag = 1;
+
+ if (!move_window(dj.fs, sect)) return FR_RW_ERROR;
+ memset(&dir[0], 0, 32); /* Initialize the new entry */
+ memcpy(&dir[DIR_Name], fn, 8+3); /* Name */
+ dir[DIR_NTres] = fn[11];
+ dir[DIR_Attr] = AM_DIR; /* Attribute */
+ ST_DWORD(&dir[DIR_WrtTime], tim); /* Crated time */
+ ST_WORD(&dir[DIR_FstClusLO], dclust); /* Table start cluster */
+ ST_WORD(&dir[DIR_FstClusHI], dclust >> 16);
+
+ return sync(dj.fs);
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change File Attribute */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_chmod (
+ const char *path, /* Pointer to the file path */
+ BYTE value, /* Attribute bits */
+ BYTE mask /* Attribute mask to change */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir;
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path, &dj.fs, 1);
+ if (res == FR_OK) {
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+ if (res == FR_OK) { /* Trace completed */
+ if (!dir) {
+ res = FR_INVALID_NAME; /* Root directory */
+ } else {
+ mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
+ dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
+ res = sync(dj.fs);
+ }
+ }
+ }
+ return res;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Change Timestamp */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_utime (
+ const char *path, /* Pointer to the file/directory name */
+ const FILINFO *finfo /* Pointer to the timestamp to be set */
+)
+{
+ FRESULT res;
+ DIR dj;
+ BYTE *dir;
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path, &dj.fs, 1);
+ if (res == FR_OK) {
+ res = trace_path(&dj, fn, path, &dir); /* Trace the file path */
+ if (res == FR_OK) { /* Trace completed */
+ if (!dir) {
+ res = FR_INVALID_NAME; /* Root directory */
+ } else {
+ ST_WORD(&dir[DIR_WrtTime], finfo->ftime);
+ ST_WORD(&dir[DIR_WrtDate], finfo->fdate);
+ res = sync(dj.fs);
+ }
+ }
+ }
+ return res;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Rename File/Directory */
+/*-----------------------------------------------------------------------*/
+
+FRESULT f_rename (
+ const char *path_old, /* Pointer to the old name */
+ const char *path_new /* Pointer to the new name */
+)
+{
+ FRESULT res;
+ DIR dj;
+ DWORD sect_old;
+ BYTE *dir_old, *dir_new, direntry[32-11];
+ char fn[8+3+1];
+
+
+ res = auto_mount(&path_old, &dj.fs, 1);
+ if (res != FR_OK) return res;
+
+ res = trace_path(&dj, fn, path_old, &dir_old); /* Check old object */
+ if (res != FR_OK) return res; /* The old object is not found */
+ if (!dir_old) return FR_NO_FILE;
+ sect_old = dj.fs->winsect; /* Save the object information */
+ memcpy(direntry, &dir_old[DIR_Attr], 32-11);
+
+ res = trace_path(&dj, fn, path_new, &dir_new); /* Check new object */
+ if (res == FR_OK) return FR_EXIST; /* The new object name is already existing */
+ if (res != FR_NO_FILE) return res; /* Is there no old name? */
+ res = reserve_direntry(&dj, &dir_new); /* Reserve a directory entry */
+ if (res != FR_OK) return res;
+
+ memcpy(&dir_new[DIR_Attr], direntry, 32-11); /* Create new entry */
+ memcpy(&dir_new[DIR_Name], fn, 8+3);
+ dir_new[DIR_NTres] = fn[11];
+ dj.fs->winflag = 1;
+
+ if (!move_window(dj.fs, sect_old)) return FR_RW_ERROR; /* Delete old entry */
+ dir_old[DIR_Name] = 0xE5;
+
+ return sync(dj.fs);
+}
+
+#endif /* !_FS_READONLY */
+#endif /* _FS_MINIMIZE == 0 */
+#endif /* _FS_MINIMIZE <= 1 */
+#endif /* _FS_MINIMIZE <= 2 */
+
+
+
+#if _USE_MKFS && !_FS_READONLY
+/*-----------------------------------------------------------------------*/
+/* Create File System on the Drive */
+/*-----------------------------------------------------------------------*/
+#define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */
+#define N_FATS 1 /* 1 or 2 */
+#define MAX_SECTOR 64000000UL /* Maximum partition size */
+#define MIN_SECTOR 2000UL /* Minimum partition size */
+
+
+
+FRESULT f_mkfs (
+ BYTE drv, /* Logical drive number */
+ BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */
+ WORD allocsize /* Allocation unit size [bytes] */
+)
+{
+ BYTE fmt, m, *tbl;
+ DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */
+ DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */
+ DWORD n_clust, n;
+ FATFS *fs;
+ DSTATUS stat;
+
+
+ /* Check validity of the parameters */
+ if (drv >= _DRIVES) return FR_INVALID_DRIVE;
+ if (partition >= 2) return FR_MKFS_ABORTED;
+ for (n = 512; n <= 32768U && n != allocsize; n <<= 1);
+ if (n != allocsize) return FR_MKFS_ABORTED;
+
+ /* Check mounted drive and clear work area */
+ fs = FatFs[drv];
+ if (!fs) return FR_NOT_ENABLED;
+ fs->fs_type = 0;
+ drv = LD2PD(drv);
+
+ /* Get disk statics */
+ stat = disk_initialize(drv);
+ if (stat & STA_NOINIT) return FR_NOT_READY;
+ if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
+ if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR)
+ return FR_MKFS_ABORTED;
+ if (n_part > MAX_SECTOR) n_part = MAX_SECTOR;
+ b_part = (!partition) ? 63 : 0; /* Boot sector */
+ n_part -= b_part;
+#if S_MAX_SIZ > 512 /* Check disk sector size */
+ if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
+ || SS(fs) > S_MAX_SIZ
+ || SS(fs) > allocsize)
+ return FR_MKFS_ABORTED;
+#endif
+ allocsize /= SS(fs); /* Number of sectors per cluster */
+
+ /* Pre-compute number of clusters and FAT type */
+ n_clust = n_part / allocsize;
+ fmt = FS_FAT12;
+ if (n_clust >= 0xFF5) fmt = FS_FAT16;
+ if (n_clust >= 0xFFF5) fmt = FS_FAT32;
+
+ /* Determine offset and size of FAT structure */
+ switch (fmt) {
+ case FS_FAT12:
+ n_fat = ((n_clust * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs);
+ n_rsv = 1 + partition;
+ n_dir = N_ROOTDIR * 32 / SS(fs);
+ break;
+ case FS_FAT16:
+ n_fat = ((n_clust * 2) + 4 + SS(fs) - 1) / SS(fs);
+ n_rsv = 1 + partition;
+ n_dir = N_ROOTDIR * 32 / SS(fs);
+ break;
+ default:
+ n_fat = ((n_clust * 4) + 8 + SS(fs) - 1) / SS(fs);
+ n_rsv = 33 - partition;
+ n_dir = 0;
+ }
+ b_fat = b_part + n_rsv; /* FATs start sector */
+ b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
+ b_data = b_dir + n_dir; /* Data start sector */
+
+ /* Align data start sector to erase block boundary (for flash memory media) */
+ if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED;
+ n = (b_data + n - 1) & ~(n - 1);
+ n_fat += (n - b_data) / N_FATS;
+ /* b_dir and b_data are no longer used below */
+
+ /* Determine number of cluster and final check of validity of the FAT type */
+ n_clust = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
+ if ( (fmt == FS_FAT16 && n_clust < 0xFF5)
+ || (fmt == FS_FAT32 && n_clust < 0xFFF5))
+ return FR_MKFS_ABORTED;
+
+ /* Create partition table if needed */
+ if (!partition) {
+ DWORD n_disk = b_part + n_part;
+
+ tbl = &fs->win[MBR_Table];
+ ST_DWORD(&tbl[0], 0x00010180); /* Partition start in CHS */
+ if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
+ n_disk = n_disk / 63 / 255;
+ tbl[7] = (BYTE)n_disk;
+ tbl[6] = (BYTE)((n_disk >> 2) | 63);
+ } else {
+ ST_WORD(&tbl[6], 0xFFFF);
+ }
+ tbl[5] = 254;
+ if (fmt != FS_FAT32) /* System ID */
+ tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06;
+ else
+ tbl[4] = 0x0c;
+ ST_DWORD(&tbl[8], 63); /* Partition start in LBA */
+ ST_DWORD(&tbl[12], n_part); /* Partition size in LBA */
+ ST_WORD(&tbl[64], 0xAA55); /* Signature */
+ if (disk_write(drv, fs->win, 0, 1) != RES_OK)
+ return FR_RW_ERROR;
+ }
+
+ /* Create boot record */
+ tbl = fs->win; /* Clear buffer */
+ memset(tbl, 0, SS(fs));
+ ST_DWORD(&tbl[BS_jmpBoot], 0x90FEEB); /* Boot code (jmp $, nop) */
+ ST_WORD(&tbl[BPB_BytsPerSec], SS(fs)); /* Sector size */
+ tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */
+ ST_WORD(&tbl[BPB_RsvdSecCnt], n_rsv); /* Reserved sectors */
+ tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
+ ST_WORD(&tbl[BPB_RootEntCnt], SS(fs) / 32 * n_dir); /* Number of rootdir entries */
+ if (n_part < 0x10000) { /* Number of total sectors */
+ ST_WORD(&tbl[BPB_TotSec16], n_part);
+ } else {
+ ST_DWORD(&tbl[BPB_TotSec32], n_part);
+ }
+ tbl[BPB_Media] = 0xF8; /* Media descripter */
+ ST_WORD(&tbl[BPB_SecPerTrk], 63); /* Number of sectors per track */
+ ST_WORD(&tbl[BPB_NumHeads], 255); /* Number of heads */
+ ST_DWORD(&tbl[BPB_HiddSec], b_part); /* Hidden sectors */
+ n = get_fattime(); /* Use current time as a VSN */
+ if (fmt != FS_FAT32) {
+ ST_DWORD(&tbl[BS_VolID], n); /* Volume serial number */
+ ST_WORD(&tbl[BPB_FATSz16], n_fat); /* Number of secters per FAT */
+ tbl[BS_DrvNum] = 0x80; /* Drive number */
+ tbl[BS_BootSig] = 0x29; /* Extended boot signature */
+ memcpy(&tbl[BS_VolLab], "NO NAME FAT ", 19); /* Volume lavel, FAT signature */
+ } else {
+ ST_DWORD(&tbl[BS_VolID32], n); /* Volume serial number */
+ ST_DWORD(&tbl[BPB_FATSz32], n_fat); /* Number of secters per FAT */
+ ST_DWORD(&tbl[BPB_RootClus], 2); /* Root directory cluster (2) */
+ ST_WORD(&tbl[BPB_FSInfo], 1); /* FSInfo record (bs+1) */
+ ST_WORD(&tbl[BPB_BkBootSec], 6); /* Backup boot record (bs+6) */
+ tbl[BS_DrvNum32] = 0x80; /* Drive number */
+ tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
+ memcpy(&tbl[BS_VolLab32], "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */
+ }
+ ST_WORD(&tbl[BS_55AA], 0xAA55); /* Signature */
+ if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
+ return FR_RW_ERROR;
+ if (fmt == FS_FAT32)
+ disk_write(drv, tbl, b_part+6, 1);
+
+ /* Initialize FAT area */
+ for (m = 0; m < N_FATS; m++) {
+ memset(tbl, 0, SS(fs)); /* 1st sector of the FAT */
+ if (fmt != FS_FAT32) {
+ n = (fmt == FS_FAT12) ? 0x00FFFFF8 : 0xFFFFFFF8;
+ ST_DWORD(&tbl[0], n); /* Reserve cluster #0-1 (FAT12/16) */
+ } else {
+ ST_DWORD(&tbl[0], 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */
+ ST_DWORD(&tbl[4], 0xFFFFFFFF);
+ ST_DWORD(&tbl[8], 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
+ }
+ if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
+ return FR_RW_ERROR;
+ memset(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */
+ for (n = 1; n < n_fat; n++) {
+ if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
+ return FR_RW_ERROR;
+ }
+ }
+
+ /* Initialize Root directory */
+ m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
+ do {
+ if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
+ return FR_RW_ERROR;
+ } while (--m);
+
+ /* Create FSInfo record if needed */
+ if (fmt == FS_FAT32) {
+ ST_WORD(&tbl[BS_55AA], 0xAA55);
+ ST_DWORD(&tbl[FSI_LeadSig], 0x41615252);
+ ST_DWORD(&tbl[FSI_StrucSig], 0x61417272);
+ ST_DWORD(&tbl[FSI_Free_Count], n_clust - 1);
+ ST_DWORD(&tbl[FSI_Nxt_Free], 0xFFFFFFFF);
+ disk_write(drv, tbl, b_part+1, 1);
+ disk_write(drv, tbl, b_part+7, 1);
+ }
+
+ return (disk_ioctl(drv, CTRL_SYNC, NULL) == RES_OK) ? FR_OK : FR_RW_ERROR;
+}
+
+#endif /* _USE_MKFS && !_FS_READONLY */
+
+
+
+
+#if _USE_STRFUNC >= 1
+/*-----------------------------------------------------------------------*/
+/* Get a string from the file */
+/*-----------------------------------------------------------------------*/
+char* fgets (
+ char* buff, /* Pointer to the string buffer to read */
+ int len, /* Size of string buffer */
+ FIL* fil /* Pointer to the file object */
+)
+{
+ int i = 0;
+ char *p = buff;
+ UINT rc;
+
+
+ while (i < len - 1) { /* Read bytes until buffer gets filled */
+ f_read(fil, p, 1, &rc);
+ if (rc != 1) break; /* Break when no data to read */
+#if _USE_STRFUNC >= 2
+ if (*p == '\r') continue; /* Strip '\r' */
+#endif
+ i++;
+ if (*p++ == '\n') break; /* Break when reached end of line */
+ }
+ *p = 0;
+ return i ? buff : 0; /* When no data read (eof or error), return with error. */
+}
+
+
+
+#if !_FS_READONLY
+#include <stdarg.h>
+/*-----------------------------------------------------------------------*/
+/* Put a character to the file */
+/*-----------------------------------------------------------------------*/
+int fputc (
+ int chr, /* A character to be output */
+ FIL* fil /* Ponter to the file object */
+)
+{
+ UINT bw;
+ char c;
+
+
+#if _USE_STRFUNC >= 2
+ if (chr == '\n') fputc ('\r', fil); /* LF -> CRLF conversion */
+#endif
+ if (!fil) { /* Special value may be used to switch the destination to any other device */
+ /* put_console(chr); */
+ return chr;
+ }
+ c = (char)chr;
+ f_write(fil, &c, 1, &bw); /* Write a byte to the file */
+ return bw ? chr : EOF; /* Return the resulut */
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Put a string to the file */
+/*-----------------------------------------------------------------------*/
+int fputs (
+ const char* str, /* Pointer to the string to be output */
+ FIL* fil /* Pointer to the file object */
+)
+{
+ int n;
+
+
+ for (n = 0; *str; str++, n++) {
+ if (fputc(*str, fil) == EOF) return EOF;
+ }
+ return n;
+}
+
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Put a formatted string to the file */
+/*-----------------------------------------------------------------------*/
+int fprintf (
+ FIL* fil, /* Pointer to the file object */
+ const char* str, /* Pointer to the format string */
+ ... /* Optional arguments... */
+)
+{
+ va_list arp;
+ UCHAR c, f, r;
+ ULONG val;
+ char s[16];
+ int i, w, res, cc;
+
+
+ va_start(arp, str);
+
+ for (cc = res = 0; cc != EOF; res += cc) {
+ c = *str++;
+ if (c == 0) break; /* End of string */
+ if (c != '%') { /* Non escape cahracter */
+ cc = fputc(c, fil);
+ if (cc != EOF) cc = 1;
+ continue;
+ }
+ w = f = 0;
+ c = *str++;
+ if (c == '0') { /* Flag: '0' padding */
+ f = 1; c = *str++;
+ }
+ while (c >= '0' && c <= '9') { /* Precision */
+ w = w * 10 + (c - '0');
+ c = *str++;
+ }
+ if (c == 'l') { /* Prefix: Size is long int */
+ f |= 2; c = *str++;
+ }
+ if (c == 's') { /* Type is string */
+ cc = fputs(va_arg(arp, char*), fil);
+ continue;
+ }
+ if (c == 'c') { /* Type is character */
+ cc = fputc(va_arg(arp, char), fil);
+ if (cc != EOF) cc = 1;
+ continue;
+ }
+ r = 0;
+ if (c == 'd') r = 10; /* Type is signed decimal */
+ if (c == 'u') r = 10; /* Type is unsigned decimal */
+ if (c == 'X') r = 16; /* Type is unsigned hexdecimal */
+ if (r == 0) break; /* Unknown type */
+ if (f & 2) { /* Get the value */
+ val = (ULONG)va_arg(arp, long);
+ } else {
+ val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
+ }
+ /* Put numeral string */
+ if (c == 'd') {
+ if (val >= 0x80000000) {
+ val = 0 - val;
+ f |= 4;
+ }
+ }
+ i = sizeof(s) - 1; s[i] = 0;
+ do {
+ c = (UCHAR)(val % r + '0');
+ if (c > '9') c += 7;
+ s[--i] = c;
+ val /= r;
+ } while (i && val);
+ if (i && (f & 4)) s[--i] = '-';
+ w = sizeof(s) - 1 - w;
+ while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
+ cc = fputs(&s[i], fil);
+ }
+
+ va_end(arp);
+ return (cc == EOF) ? cc : res;
+}
+
+#endif /* !_FS_READONLY */
+#endif /* _USE_STRFUNC >= 1*/
+
+#endif /* _FATFS_TINY */
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