ff.c

FAT16 Microchip Application not for PIC24F

	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