Tick Tock
Dual CANbus monitor and instrumentation cluster. Presently tuned for the Nissan Leaf EV.
Dependencies: SPI_TFTx2_ILI9341 TFT_fonts TOUCH_TFTx2_ILI9341 mbed
Fork of
CANary_corrupt
by 
Tick Tock
After adding the LPC1768 platform, import as a program and do not select the "update to latest revision" box
User Guide
Eagle Schematic and Board design
/media/uploads/TickTock/canaryr6.zip
For LCD Rev 1.01:
For VCD Rev 2.00:
Parts List
Assembly
1) LCD Displays
I found ribbon cable is a nice way to organize the wires to the displays. There are two versions of the display and each must be wired differently. The original project used HW REV. 1.01. For that version, you'll need 12 conductors and I connected them in the following order:
| 1 | LED+ |
| 2 | LED- |
| 3 | RST |
| 4 | SDI |
| 5 | WR/SCLK |
| 6 | CS |
| 7 | X+ |
| 8 | X- |
| 9 | Y+ |
| 10 | Y- |
| 11 | VDD |
| 12 | GND |
If, instead, you have HW REV 2.0, you will need 13 conductors with the following order:
| 1 | LED+ |
| 2 | LED- |
| 3 | RST |
| 4 | SDI |
| 5 | RS (SCLK) |
| 6 | WR (DC) |
| 7 | CS |
| 8 | X+ |
| 9 | X- |
| 10 | Y+ |
| 11 | Y- |
| 12 | VDD |
| 13 | GND |
First I connected all the GND connections (2 GND & IM0, IM1, IM3 for REV1.01 or 2 GND, RD, & IM0 for REV2.00). Do not connect the bottom GND until you have the ribbon cable connected. After making all the ribbon cable connections (connecting the GND of the ribbon cable to the bottom GND pad), solder the GND bar from the previous step to the back of the bottom GND connection. Finally, make a connection from the back side 3.3V pin to IM2 for REV1.01 or to IM1,IM2,&IM3 for REV2.00. Take a break and repeat for the second display.
Examples of REV1.01 boards:
Examples of REV2.00:
Once the two displays are complete combine all wires except CS0, CS1, X+, X-, Y+, and Y-. Connect X- of the left display to X+ of the right. Similarly connect Y- of the left display to Y+ of the right. Insulate any exposed wires.
2) PCB
Refer to the schematics to place all the components on the board. If you plan to install into the CANary 3D enclosure, DO NOT install the battery holder or the socket for the mbed and, instead, connect two wires to the VB and GND pads nearby. You will have to install the battery holder against the back wall to avoid interfering with the right-hand display and the mbed will have to be directly soldered. I have not found a socket with a low enough profile to fit in the space provided (depth of enclosure is limited by the space behind the center console). Also, I recommend keeping as much lead as possible on the Zener diode (bending it as shown to clear the back wall). Although it is operating well within parameters, the Zener gets quite hot during extended operation and the leads help dissipate the heat and keep it away from the PCB and other components.Update: Several Zeners have failed resulting in damage to some users boards so I recommend using a DC-DC converter instead to bring the 12V down to 7V.
Once the PCB is populated, solder the LCDs to the PCB. CS0 connects to the right display and CS1 connects to the left.
Update:
The Zener diodes tended to fail after a few months so I am recommending removing them and replacing with a DC-DC converter. This will run cooler and waste less energy, too. To install, remove the left display panel to gain access to the Zener. From there, the Zener can be removed and it's pads used to connect to the DC-DC converter. I recommend setting the output voltage on the bench before installing since the trim pot is tricky to reach once installed. Set it to 7V. The input can be connected to the left pad previously occupied by the zener and the output can connect to the right. GND(-) can be connected to the bottom right pad on the 2x6 header below the flex cable connector. Make sure the GND wire lies flat so it doesn't interfere with the connection of the flex cable.
Once soldered in place, the DC-DC converter can easily be mounted to the back wall with double sided tape above the battery holder.
3) Testing
| 1) | First step is to buzz out all connections from the LCDs to the pins in the main board |
| 2) | Next check the touch screen connections. On the main board, place an Ohm meter across X+ and X-. You should read 700 Ohms. Repeat for Y+ and Y-. Then test the resistance from X+ to Y+. With nothing touching the screens, it should read >100K Ohms and <1K when touching either screen. |
| 3) | When all connections are checked, solder in the mbed. Download and install the touch2 program http://mbed.org/users/TickTock/code/touch2/ to test the basic operation of the mbed and touch screens. |
| tips: | |
| Touch screen is sensitive - excess flux on X+,X-,Y+,Y- connection on mbed can result in flakey operation | |
| If touch is not working, double-check the LCD0_CS and LCD1_CS are not swapped. LCD0_CS must connect to the CS of the LCD that has X- & Y- connected to the mbed. LCD1_CS must connect to the CS of the LCD that has X+ & Y+ connected to the mbed. | |
| 4) | Once touch2 works, it is time to connect to the OBD connector. I highly recommend double checking all connections from the OBD to the PCB with the cable in place before connecting to the Leaf. Buzz out all the pins in the OBS to make sure none are shorting to each other, Check that the 12V goes to the Zener (and nothing else) and the switched 12V to the resistor divider (and nothing else). Test the ground connection properly connects to ground and nothing else. |
| 5) | Once you are confident there are no shorts or wrong connections from the OBD connector, take a deep breath and plug it into your leaf. Touch2 program should come up and function. Unplug and install the latest CANary firmware. If you have the REV2.00 LCD boards, you will need to edit the precompile.h file in the TOUCH_TFTx2_w9341 library and set USE_ILI9341 to 1. Test all features before installing into the enclosure (gids, cellpair, menu system, logging) since installing and removing from the enclosure is a PITA. |
4) Enclosure
The 3D printer leaves a lot of powder behind - I used a strong spray of water to get it out of all the cracks. The enclosure comes with a rather rough finish. I recommend convincing yourself you like it, then simply lightly sand then paint before assembly. Sanding is very difficult - the nylon is very nicely fused and doesn't want to sand. I tried sandblasting and that didn't work either. I had some limited success with filler and then sanding, but only on the outside - it is too difficult to sand the face.
5) Final Assembly
Make sure you are well rested with lots of patience before attempting assembly. It is a puzzle figuring out how to get both displays and the PCB in place. Enclosure was too expensive for me to keep iterating to optimize for assembly. I ended up snipping the thin display posts shorter and using various tools to push the displays into place. Also, some USB connectors are taller than others. If you have one of the taller ones, you will have to deflect the back wall a bit while inserting the PCB (being careful not to bend the housing) to get it to it's opening in the back wall. Do use a screw in the provided post to secure the PCB as USB insertion will otherwise dislodge it.
I added an additional safety line which wraps around the center post to prevent the enclosure from becoming a projectile in the event of an accident.
Installed:
CHAN_FS/ff.c
- Committer:
- TickTock
- Date:
- 2013-06-30
- Branch:
- Metric
- Revision:
- 110:ffddff3ad2f2
- Parent:
- 109:3e6f0e8fca0d
File content as of revision 110:ffddff3ad2f2:
/*----------------------------------------------------------------------------/
/ FatFs - FAT file system module R0.07e (C)ChaN, 2009
/-----------------------------------------------------------------------------/
/ FatFs module is a generic FAT file system module for small embedded systems.
/ This is a free software that opened for education, research and commercial
/ developments under license policy of following trems.
/
/ Copyright (C) 2009, ChaN, all right reserved.
/
/ * The 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 products 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.
/
/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
/ Added long file name support.
/ Added multiple code page support.
/ Added re-entrancy for multitask operation.
/ Added auto cluster size selection to f_mkfs().
/ Added rewind option to f_readdir().
/ Changed result code of critical errors.
/ Renamed string functions to avoid name collision.
/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
/ Added multiple sector size support.
/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
/ Fixed wrong cache control in f_lseek().
/ Added relative path feature.
/ Added f_chdir() and f_chdrive().
/ Added proper case conversion to extended char.
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
/ Fixed name matching error on the 13 char boundary.
/ Added a configuration option, _LFN_UNICODE.
/ Changed f_readdir() to return the SFN with always upper
/ case on non-LFN cfg.
/---------------------------------------------------------------------------*/
#include "ff.h" /* FatFs configurations and declarations */
#include "diskio.h" /* Declarations of low level disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 0x007E
#error Wrong include file (ff.h).
#endif
#if _FS_REENTRANT
#if _USE_LFN == 1
#error Static LFN work area must not be used in re-entrant configuration.
#endif
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
#else
#define ENTER_FF(fs)
#define LEAVE_FF(fs, res) return res
#endif
#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
#ifndef NULL
#define NULL 0
#endif
/* Name status flags */
#define NS 11 /* Offset of name status byte */
#define NS_LOSS 0x01 /* Out of 8.3 format */
#define NS_LFN 0x02 /* Force to create LFN entry */
#define NS_LAST 0x04 /* Last segment */
#define NS_BODY 0x08 /* Lower case flag (body) */
#define NS_EXT 0x10 /* Lower case flag (ext) */
#define NS_DOT 0x20 /* Dot entry */
/*--------------------------------------------------------------------------
Private Work Area
---------------------------------------------------------------------------*/
#if _DRIVES < 1 || _DRIVES > 9
#error Number of drives must be 1-9.
#endif
static
FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */
static
WORD Fsid; /* File system mount ID */
#if _FS_RPATH
static
BYTE Drive; /* Current drive */
#endif
#if _USE_LFN == 1 /* LFN with static LFN working buffer */
static
WCHAR LfnBuf[_MAX_LFN + 1];
#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR *lp = LfnBuf
#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
#elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */
#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
#else /* No LFN */
#define NAMEBUF(sp,lp) BYTE sp[12]
#define INITBUF(dj,sp,lp) dj.fn = sp
#endif
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
/* Copy memory to memory */
static
void mem_cpy (void* dst, const void* src, int cnt) {
char *d = (char*)dst;
const char *s = (const char *)src;
while (cnt--) *d++ = *s++;
}
/* 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;
}
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
#if _FS_REENTRANT
static
BOOL lock_fs (
FATFS *fs /* File system object */
)
{
return ff_req_grant(fs->sobj);
}
static
void unlock_fs (
FATFS *fs, /* File system object */
FRESULT res /* Result code to be returned */
)
{
if (res != FR_NOT_ENABLED &&
res != FR_INVALID_DRIVE &&
res != FR_INVALID_OBJECT &&
res != FR_TIMEOUT) {
ff_rel_grant(fs->sobj);
}
}
#endif
/*-----------------------------------------------------------------------*/
/* Change window offset */
/*-----------------------------------------------------------------------*/
static
FRESULT move_window (
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
if (fs->wflag) { /* Write back dirty window if needed */
if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
return FR_DISK_ERR;
fs->wflag = 0;
if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */
BYTE nf;
for (nf = fs->n_fats; nf > 1; nf--) { /* Refrect the change to all FAT copies */
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 FR_DISK_ERR;
fs->winsect = sector;
}
}
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Clean-up cached data */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
FATFS *fs /* File system object */
)
{
FRESULT res;
res = move_window(fs, 0);
if (res == FR_OK) {
/* Update FSInfo sector if needed */
if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
fs->winsect = 0;
mem_set(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;
}
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK)
res = FR_DISK_ERR;
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* FAT access - Read value of a FAT entry */
/*-----------------------------------------------------------------------*/
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to get the link information */
)
{
UINT wc, bc;
DWORD fsect;
if (clst < 2 || clst >= fs->max_clust) /* Range check */
return 1;
fsect = fs->fatbase;
switch (fs->fs_type) {
case FS_FAT12 :
bc = clst; bc += bc / 2;
if (move_window(fs, fsect + (bc / SS(fs)))) break;
wc = fs->win[bc & (SS(fs) - 1)]; bc++;
if (move_window(fs, fsect + (bc / SS(fs)))) break;
wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
case FS_FAT16 :
if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break;
return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]);
case FS_FAT32 :
if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break;
return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
}
return 0xFFFFFFFF; /* An error occured at the disk I/O layer */
}
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
FRESULT put_fat (
FATFS *fs, /* File system object */
DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */
DWORD val /* New value to mark the cluster */
)
{
UINT bc;
BYTE *p;
DWORD fsect;
FRESULT res;
if (clst < 2 || clst >= fs->max_clust) { /* Range check */
res = FR_INT_ERR;
} else {
fsect = fs->fatbase;
switch (fs->fs_type) {
case FS_FAT12 :
bc = clst; bc += bc / 2;
res = move_window(fs, fsect + (bc / SS(fs)));
if (res != FR_OK) break;
p = &fs->win[bc & (SS(fs) - 1)];
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
bc++;
fs->wflag = 1;
res = move_window(fs, fsect + (bc / SS(fs)));
if (res != FR_OK) break;
p = &fs->win[bc & (SS(fs) - 1)];
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
break;
case FS_FAT16 :
res = move_window(fs, fsect + (clst / (SS(fs) / 2)));
if (res != FR_OK) break;
ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val);
break;
case FS_FAT32 :
res = move_window(fs, fsect + (clst / (SS(fs) / 4)));
if (res != FR_OK) break;
ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val);
break;
default :
res = FR_INT_ERR;
}
fs->wflag = 1;
}
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT handling - Remove a cluster chain */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT remove_chain (
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to remove a chain from */
)
{
FRESULT res;
DWORD nxt;
if (clst < 2 || clst >= fs->max_clust) { /* Check the range of cluster# */
res = FR_INT_ERR;
} else {
res = FR_OK;
while (clst < fs->max_clust) { /* Not a last link? */
nxt = get_fat(fs, clst); /* Get cluster status */
if (nxt == 0) break; /* Empty cluster? */
if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
if (res != FR_OK) break;
if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
fs->free_clust++;
fs->fsi_flag = 1;
}
clst = nxt; /* Next cluster */
}
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* FAT handling - Stretch or Create a cluster chain */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
)
{
DWORD cs, ncl, scl, mcl;
mcl = fs->max_clust;
if (clst == 0) { /* Create new chain */
scl = fs->last_clust; /* Get suggested start point */
if (scl == 0 || scl >= mcl) scl = 1;
}
else { /* Stretch existing chain */
cs = get_fat(fs, clst); /* Check the cluster status */
if (cs < 2) return 1; /* It is an invalid cluster */
if (cs < mcl) return cs; /* It is already followed by next cluster */
scl = clst;
}
ncl = scl; /* Start cluster */
for (;;) {
ncl++; /* Next cluster */
if (ncl >= mcl) { /* Wrap around */
ncl = 2;
if (ncl > scl) return 0; /* No free custer */
}
cs = get_fat(fs, ncl); /* Get the cluster status */
if (cs == 0) break; /* Found a free cluster */
if (cs == 0xFFFFFFFF || cs == 1)/* An error occured */
return cs;
if (ncl == scl) return 0; /* No free custer */
}
if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "in use" */
return 0xFFFFFFFF;
if (clst != 0) { /* Link it to the previous one if needed */
if (put_fat(fs, clst, ncl))
return 0xFFFFFFFF;
}
fs->last_clust = ncl; /* Update FSINFO */
if (fs->free_clust != 0xFFFFFFFF) {
fs->free_clust--;
fs->fsi_flag = 1;
}
return ncl; /* Return new cluster number */
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Get sector# from cluster# */
/*-----------------------------------------------------------------------*/
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to be converted */
)
{
clst -= 2;
if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
return clst * fs->csize + fs->database;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Seek directory index */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_seek (
eDIR *dj, /* Pointer to directory object */
WORD idx /* Directory index number */
)
{
DWORD clst;
WORD ic;
dj->index = idx;
clst = dj->sclust;
if (clst == 1 || clst >= dj->fs->max_clust) /* Check start cluster range */
return FR_INT_ERR;
if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
clst = dj->fs->dirbase;
if (clst == 0) { /* Static table */
dj->clust = clst;
if (idx >= dj->fs->n_rootdir) /* Index is out of range */
return FR_INT_ERR;
dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
}
else { /* Dynamic table */
ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
while (idx >= ic) { /* Follow cluster chain */
clst = get_fat(dj->fs, clst); /* Get next cluster */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
if (clst < 2 || clst >= dj->fs->max_clust) /* Reached to end of table or int error */
return FR_INT_ERR;
idx -= ic;
}
dj->clust = clst;
dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
}
dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the 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 */
eDIR *dj, /* Pointer to directory object */
BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */
)
{
DWORD clst;
WORD i;
i = dj->index + 1;
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
return FR_NO_FILE;
if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
dj->sect++; /* Next sector */
if (dj->clust == 0) { /* Static table */
if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
return FR_NO_FILE;
}
else { /* Dynamic table */
if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
if (clst <= 1) return FR_INT_ERR;
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
if (clst >= dj->fs->max_clust) { /* When it reached end of dynamic table */
#if !_FS_READONLY
BYTE c;
if (!streach) return FR_NO_FILE; /* When do not streach, report EOT */
clst = create_chain(dj->fs, dj->clust); /* Streach cluster chain */
if (clst == 0) return FR_DENIED; /* No free cluster */
if (clst == 1) return FR_INT_ERR;
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
/* Clean-up streached table */
if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
dj->fs->wflag = 1;
if (move_window(dj->fs, 0)) return FR_DISK_ERR;
dj->fs->winsect++;
}
dj->fs->winsect -= c; /* Rewind window address */
#else
return FR_NO_FILE; /* Report EOT */
#endif
}
dj->clust = clst; /* Initialize data for new cluster */
dj->sect = clust2sect(dj->fs, clst);
}
}
}
dj->index = i;
dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
static
const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
static
BOOL cmp_lfn ( /* TRUE:Matched, FALSE:Not matched */
WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
BYTE *dir /* Pointer to the directory entry containing a part of LFN */
)
{
int i, s;
WCHAR wc, uc;
i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
s = 0; wc = 1;
do {
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
if (wc) { /* Last char has not been processed */
wc = ff_wtoupper(uc); /* Convert it to upper case */
if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
return FALSE; /* Not matched */
} else {
if (uc != 0xFFFF) return FALSE; /* Check filler */
}
} while (++s < 13); /* Repeat until all chars in the entry are checked */
if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
return FALSE;
return TRUE; /* The part of LFN matched */
}
static
BOOL pick_lfn ( /* TRUE:Succeeded, FALSE:Buffer overflow */
WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
BYTE *dir /* Pointer to the directory entry */
)
{
int i, s;
WCHAR wc, uc;
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
s = 0; wc = 1;
do {
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
if (wc) { /* Last char has not been processed */
if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
lfnbuf[i++] = wc = uc; /* Store it */
} else {
if (uc != 0xFFFF) return FALSE; /* Check filler */
}
} while (++s < 13); /* Read all character in the entry */
if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
lfnbuf[i] = 0;
}
return TRUE;
}
#if !_FS_READONLY
static
void fit_lfn (
const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
BYTE *dir, /* Pointer to the directory entry */
BYTE ord, /* LFN order (1-20) */
BYTE sum /* SFN sum */
)
{
int i, s;
WCHAR wc;
dir[LDIR_Chksum] = sum; /* Set check sum */
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
dir[LDIR_Type] = 0;
ST_WORD(dir+LDIR_FstClusLO, 0);
i = (ord - 1) * 13; /* Get offset in the LFN buffer */
s = wc = 0;
do {
if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
ST_WORD(dir+LfnOfs[s], wc); /* Put it */
if (!wc) wc = 0xFFFF; /* Padding chars following last char */
} while (++s < 13);
if (wc == 0xFFFF || !lfnbuf[i]) ord |= 0x40; /* Bottom LFN part is the start of LFN sequence */
dir[LDIR_Ord] = ord; /* Set the LFN order */
}
#endif
#endif
/*-----------------------------------------------------------------------*/
/* Create numbered name */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
void gen_numname (
BYTE *dst, /* Pointer to genartated SFN */
const BYTE *src, /* Pointer to source SFN to be modified */
const WCHAR *lfn, /* Pointer to LFN */
WORD num /* Sequense number */
)
{
char ns[8];
int i, j;
mem_cpy(dst, src, 11);
if (num > 5) { /* On many collisions, generate a hash number instead of sequencial number */
do num = (num >> 1) + (num << 15) + (WORD)*lfn++; while (*lfn);
}
/* itoa */
i = 7;
do {
ns[i--] = (num % 10) + '0';
num /= 10;
} while (num);
ns[i] = '~';
/* Append the number */
for (j = 0; j < i && dst[j] != ' '; j++) {
if (IsDBCS1(dst[j])) {
if (j == i - 1) break;
j++;
}
}
do {
dst[j++] = (i < 8) ? ns[i++] : ' ';
} while (j < 8);
}
#endif
/*-----------------------------------------------------------------------*/
/* Calculate sum of an SFN */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
static
BYTE sum_sfn (
const BYTE *dir /* Ptr to directory entry */
)
{
BYTE sum = 0;
int n = 11;
do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
return sum;
}
#endif
/*-----------------------------------------------------------------------*/
/* Directory handling - Find an object in the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_find (
eDIR *dj /* Pointer to the directory object linked to the file name */
)
{
FRESULT res;
BYTE c, *dir;
#if _USE_LFN
BYTE a, ord, sum;
#endif
res = dir_seek(dj, 0); /* Rewind directory object */
if (res != FR_OK) return res;
#if _USE_LFN
ord = sum = 0xFF;
#endif
do {
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
dir = dj->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
#if _USE_LFN /* LFN configuration */
a = dir[DIR_Attr] & AM_MASK;
if (c == 0xE5 || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
ord = 0xFF;
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (dj->lfn) {
if (c & 0x40) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= 0xBF; ord = c; /* LFN start order */
dj->lfn_idx = dj->index;
}
/* Check validity of the LFN entry and compare it with given name */
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
}
} else { /* An SFN entry is found */
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
}
}
#else /* Non LFN configuration */
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
break;
#endif
res = dir_next(dj, FALSE); /* Next entry */
} while (res == FR_OK);
return res;
}
/*-----------------------------------------------------------------------*/
/* Read an object from the directory */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1
static
FRESULT dir_read (
eDIR *dj /* Pointer to the directory object that pointing the entry to be read */
)
{
FRESULT res;
BYTE c, *dir;
#if _USE_LFN
BYTE a, ord = 0xFF, sum = 0xFF;
#endif
res = FR_NO_FILE;
while (dj->sect) {
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
dir = dj->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
#if _USE_LFN /* LFN configuration */
a = dir[DIR_Attr] & AM_MASK;
if (c == 0xE5 || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
ord = 0xFF;
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (c & 0x40) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= 0xBF; ord = c;
dj->lfn_idx = dj->index;
}
/* Check LFN validity and capture it */
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
} else { /* An SFN entry is found */
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
dj->lfn_idx = 0xFFFF; /* It has no LFN. */
break;
}
}
#else /* Non LFN configuration */
if (c != 0xE5 && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
break;
#endif
res = dir_next(dj, FALSE); /* Next entry */
if (res != FR_OK) break;
}
if (res != FR_OK) dj->sect = 0;
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Register an object to the directory */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
eDIR *dj /* Target directory with object name to be created */
)
{
FRESULT res;
BYTE c, *dir;
#if _USE_LFN /* LFN configuration */
WORD n, ne, is;
BYTE sn[12], *fn, sum;
WCHAR *lfn;
fn = dj->fn; lfn = dj->lfn;
mem_cpy(sn, fn, 12);
if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
fn[NS] = 0; dj->lfn = NULL; /* Find only SFN */
for (n = 1; n < 100; n++) {
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
res = dir_find(dj); /* Check if the name collides with existing SFN */
if (res != FR_OK) break;
}
if (n == 100) return FR_DENIED; /* Abort if too many collisions */
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
fn[NS] = sn[NS]; dj->lfn = lfn;
}
if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */
for (ne = 0; lfn[ne]; ne++) ;
ne = (ne + 25) / 13;
} else { /* Otherwise reserve only an SFN entry. */
ne = 1;
}
/* Reserve contiguous entries */
res = dir_seek(dj, 0);
if (res != FR_OK) return res;
n = is = 0;
do {
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
c = *dj->dir; /* Check the entry status */
if (c == 0xE5 || c == 0) { /* Is it a blank entry? */
if (n == 0) is = dj->index; /* First index of the contigulus entry */
if (++n == ne) break; /* A contiguous entry that requiered count is found */
} else {
n = 0; /* Not a blank entry. Restart to search */
}
res = dir_next(dj, TRUE); /* Next entry with table streach */
} while (res == FR_OK);
if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
res = dir_seek(dj, is);
if (res == FR_OK) {
sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
ne--;
do { /* Store LFN entries in bottom first */
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
dj->fs->wflag = 1;
res = dir_next(dj, FALSE); /* Next entry */
} while (res == FR_OK && --ne);
}
}
#else /* Non LFN configuration */
res = dir_seek(dj, 0);
if (res == FR_OK) {
do { /* Find a blank entry for the SFN */
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
c = *dj->dir;
if (c == 0xE5 || c == 0) break; /* Is it a blank entry? */
res = dir_next(dj, TRUE); /* Next entry with table streach */
} while (res == FR_OK);
}
#endif
if (res == FR_OK) { /* Initialize the SFN entry */
res = move_window(dj->fs, dj->sect);
if (res == FR_OK) {
dir = dj->dir;
mem_set(dir, 0, 32); /* Clean the entry */
mem_cpy(dir, dj->fn, 11); /* Put SFN */
dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
dj->fs->wflag = 1;
}
}
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Remove an object from the directory */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY && !_FS_MINIMIZE
static
FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
eDIR *dj /* Directory object pointing the entry to be removed */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
WORD i;
i = dj->index; /* SFN index */
res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
if (res == FR_OK) {
do {
res = move_window(dj->fs, dj->sect);
if (res != FR_OK) break;
*dj->dir = 0xE5; /* Mark the entry "deleted" */
dj->fs->wflag = 1;
if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
res = dir_next(dj, FALSE); /* Next entry */
} while (res == FR_OK);
if (res == FR_NO_FILE) res = FR_INT_ERR;
}
#else /* Non LFN configuration */
res = dir_seek(dj, dj->index);
if (res == FR_OK) {
res = move_window(dj->fs, dj->sect);
if (res == FR_OK) {
*dj->dir = 0xE5; /* Mark the entry "deleted" */
dj->fs->wflag = 1;
}
}
#endif
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Pick a segment and create the object name in directory form */
/*-----------------------------------------------------------------------*/
static
FRESULT create_name (
eDIR *dj, /* Pointer to the directory object */
const XCHAR **path /* Pointer to pointer to the segment in the path string */
)
{
#ifdef _EXCVT
static const BYTE cvt[] = _EXCVT;
#endif
#if _USE_LFN /* LFN configuration */
BYTE b, cf;
WCHAR w, *lfn;
int i, ni, si, di;
const XCHAR *p;
/* Create LFN in Unicode */
si = di = 0;
p = *path;
lfn = dj->lfn;
for (;;) {
w = p[si++]; /* Get a character */
if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
if (di >= _MAX_LFN) /* Reject too long name */
return FR_INVALID_NAME;
#if !_LFN_UNICODE
w &= 0xFF;
if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
b = p[si++]; /* Get 2nd byte */
if (!IsDBCS2(b)) /* Reject invalid code for DBC */
return FR_INVALID_NAME;
w = (w << 8) + b;
}
w = ff_convert(w, 1); /* Convert OEM to Unicode */
if (!w) return FR_INVALID_NAME; /* Reject invalid code */
#endif
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
return FR_INVALID_NAME;
lfn[di++] = w; /* Store the Unicode char */
}
*path = &p[si]; /* Rerurn pointer to the next segment */
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
#if _FS_RPATH
if ((di == 1 && lfn[di - 1] == '.') || /* Is this a dot entry? */
(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
lfn[di] = 0;
for (i = 0; i < 11; i++)
dj->fn[i] = (i < di) ? '.' : ' ';
dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
return FR_OK;
}
#endif
while (di) { /* Strip trailing spaces and dots */
w = lfn[di - 1];
if (w != ' ' && w != '.') break;
di--;
}
if (!di) return FR_INVALID_NAME; /* Reject null string */
lfn[di] = 0; /* LFN is created */
/* Create SFN in directory form */
mem_set(dj->fn, ' ', 11);
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
if (si) cf |= NS_LOSS | NS_LFN;
while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
b = i = 0; ni = 8;
for (;;) {
w = lfn[si++]; /* Get an LFN char */
if (!w) break; /* Break on enf of the LFN */
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
cf |= NS_LOSS | NS_LFN; continue;
}
if (i >= ni || si == di) { /* Extension or end of SFN */
if (ni == 11) { /* Long extension */
cf |= NS_LOSS | NS_LFN; break;
}
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
if (si > di) break; /* No extension */
si = di; i = 8; ni = 11; /* Enter extension section */
b <<= 2; continue;
}
if (w >= 0x80) { /* Non ASCII char */
#ifdef _EXCVT
w = ff_convert(w, 0); /* Unicode -> OEM code */
if (w) w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
#else
w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
#endif
cf |= NS_LFN; /* Force create LFN entry */
}
if (_DF1S && w >= 0x100) { /* Double byte char */
if (i >= ni - 1) {
cf |= NS_LOSS | NS_LFN; i = ni; continue;
}
dj->fn[i++] = (BYTE)(w >> 8);
} else { /* Single byte char */
if (!w || chk_chr("+,;[=]", w)) { /* Replace illegal chars for SFN */
w = '_'; cf |= NS_LOSS | NS_LFN; /* Lossy conversion */
} else {
if (IsUpper(w)) { /* ASCII large capital */
b |= 2;
} else {
if (IsLower(w)) { /* ASCII small capital */
b |= 1; w -= 0x20;
}
}
}
}
dj->fn[i++] = (BYTE)w;
}
if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
if (ni == 8) b <<= 2;
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
cf |= NS_LFN;
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
}
dj->fn[NS] = cf; /* SFN is created */
return FR_OK;
#else /* Non-LFN configuration */
BYTE b, c, d, *sfn;
int ni, si, i;
const char *p;
/* Create file name in directory form */
sfn = dj->fn;
mem_set(sfn, ' ', 11);
si = i = b = 0; ni = 8;
p = *path;
#if _FS_RPATH
if (p[si] == '.') { /* Is this a dot entry? */
for (;;) {
c = p[si++];
if (c != '.' || si >= 3) break;
sfn[i++] = c;
}
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
*path = &p[si]; /* Rerurn pointer to the next segment */
sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
return FR_OK;
}
#endif
for (;;) {
c = p[si++];
if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
if (c == '.' || i >= ni) {
if (ni != 8 || c != '.') return FR_INVALID_NAME;
i = 8; ni = 11;
b <<= 2; continue;
}
if (c >= 0x80) { /* Extended char */
#ifdef _EXCVT
c = cvt[c - 0x80]; /* Convert extend char (SBCS) */
#else
b |= 3; /* Eliminate NT flag if ext char is exist */
#if !_DF1S /* ASCII only cfg */
return FR_INVALID_NAME;
#endif
#endif
}
if (IsDBCS1(c)) { /* DBC 1st byte? */
d = p[si++]; /* Get 2nd byte */
if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
return FR_INVALID_NAME;
sfn[i++] = c;
sfn[i++] = d;
} else { /* Single byte code */
if (chk_chr(" \"*+,[=]|\x7F", c)) /* Reject illegal chrs for SFN */
return FR_INVALID_NAME;
if (IsUpper(c)) { /* ASCII large capital? */
b |= 2;
} else {
if (IsLower(c)) { /* ASCII small capital? */
b |= 1; c -= 0x20;
}
}
sfn[i++] = c;
}
}
*path = &p[si]; /* Rerurn pointer to the next segment */
c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
if (!i) return FR_INVALID_NAME; /* Reject null string */
if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
if (ni == 8) b <<= 2;
if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Extension has only small capital) */
if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Filename has only small capital) */
sfn[NS] = c; /* Store NT flag, File name is created */
return FR_OK;
#endif
}
/*-----------------------------------------------------------------------*/
/* Get file information from directory entry */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1
static
void get_fileinfo ( /* No return code */
eDIR *dj, /* Pointer to the directory object */
FILINFO *fno /* Pointer to the file information to be filled */
)
{
int i;
BYTE c, nt, *dir;
char *p;
p = fno->fname;
if (dj->sect) {
dir = dj->dir;
nt = dir[DIR_NTres]; /* NT flag */
for (i = 0; i < 8; i++) { /* Copy name body */
c = dir[i];
if (c == ' ') break;
if (c == 0x05) c = 0xE5;
if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
*p++ = c;
}
if (dir[8] != ' ') { /* Copy name extension */
*p++ = '.';
for (i = 8; i < 11; i++) {
c = dir[i];
if (c == ' ') break;
if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
*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;
#if _USE_LFN
if (fno->lfname) {
XCHAR *tp = fno->lfname;
WCHAR w, *lfn;
i = 0;
if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
lfn = dj->lfn;
while ((w = *lfn++) != 0) { /* Get an LFN char */
#if !_LFN_UNICODE
w = ff_convert(w, 0); /* Unicode -> OEM conversion */
if (!w) { i = 0; break; } /* Could not convert, no LFN */
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
tp[i++] = (XCHAR)(w >> 8);
#endif
if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
tp[i++] = (XCHAR)w;
}
}
tp[i] = 0; /* Terminator */
}
#endif
}
#endif /* _FS_MINIMIZE <= 1 */
/*-----------------------------------------------------------------------*/
/* Follow a file path */
/*-----------------------------------------------------------------------*/
static
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
eDIR *dj, /* Directory object to return last directory and found object */
const XCHAR *path /* Full-path string to find a file or directory */
)
{
FRESULT res;
BYTE *dir, last;
while (!_USE_LFN && *path == ' ') path++; /* Skip leading spaces */
#if _FS_RPATH
if (*path == '/' || *path == '\\') { /* There is a heading separator */
path++; dj->sclust = 0; /* Strip it and start from the root dir */
} else { /* No heading saparator */
dj->sclust = dj->fs->cdir; /* Start from the current dir */
}
#else
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
path++;
dj->sclust = 0; /* Start from the root dir */
#endif
if ((UINT)*path < ' ') { /* Null path means the start directory itself */
res = dir_seek(dj, 0);
dj->dir = NULL;
} else { /* Follow path */
for (;;) {
res = create_name(dj, &path); /* Get a segment */
if (res != FR_OK) break;
res = dir_find(dj); /* Find it */
last = *(dj->fn+NS) & NS_LAST;
if (res != FR_OK) { /* Could not find the object */
if (res == FR_NO_FILE && !last)
res = FR_NO_PATH;
break;
}
if (last) break; /* Last segment match. Function completed. */
dir = dj->dir; /* 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 = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* 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, 3: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 3;
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 ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
return 0;
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
return 0;
return 1;
}
/*-----------------------------------------------------------------------*/
/* Make sure that the file system is valid */
/*-----------------------------------------------------------------------*/
FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occured */
const XCHAR **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 fmt, *tbl;
UINT vol;
DSTATUS stat;
DWORD bsect, fsize, tsect, mclst;
const XCHAR *p = *path;
FATFS *fs;
/* Get logical drive number from the path name */
vol = p[0] - '0'; /* Is there a drive number? */
if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
p += 2; *path = p; /* Return pointer to the path name */
} else { /* No drive number is given */
#if _FS_RPATH
vol = Drive; /* Use current drive */
#else
vol = 0; /* Use drive 0 */
#endif
}
/* Check if the logical drive is valid or not */
if (vol >= _DRIVES) /* Is the drive number valid? */
return FR_INVALID_DRIVE;
*rfs = fs = FatFs[vol]; /* Returen pointer to the corresponding file system object */
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
ENTER_FF(fs); /* Lock file system */
if (fs->fs_type) { /* If the logical drive has been mounted */
stat = disk_status(fs->drive);
if (!(stat & STA_NOINIT)) { /* and the 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 mounted. Following code attempts to mount the volume */
fs->fs_type = 0; /* Clear the file system object */
fs->drive = (BYTE)LD2PD(vol); /* 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 _MAX_SS != 512 /* Get disk sector size if needed */
if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
return FR_NO_FILESYSTEM;
#endif
#if !_FS_READONLY
if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
return FR_WRITE_PROTECTED;
#endif
/* Search FAT partition on the drive */
fmt = check_fs(fs, bsect = 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(vol) * 16]; /* Partition table */
if (tbl[4]) { /* Is the partition existing? */
bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
fmt = check_fs(fs, bsect); /* Check the partition */
}
}
if (fmt == 3) return FR_DISK_ERR;
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 */
fsize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32);
fs->sects_fat = fsize;
fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
fsize *= fs->n_fats; /* (Number of sectors in FAT area) */
fs->fatbase = bsect + 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 */
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
fs->max_clust = mclst = (tsect /* Last cluster# + 1 (Number of clusters + 2) */
- LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32)
) / fs->csize + 2;
fmt = FS_FAT12; /* Determine the FAT sub type */
if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
if (mclst >= 0xFFF7) fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */
if (fmt == FS_FAT32)
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
else
fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */
#if !_FS_READONLY
/* Initialize allocation information */
fs->free_clust = 0xFFFFFFFF;
fs->wflag = 0;
/* Get fsinfo if needed */
if (fmt == FS_FAT32) {
fs->fsi_flag = 0;
fs->fsi_sector = bsect + 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
fs->fs_type = fmt; /* FAT sub-type */
fs->winsect = 0; /* Invalidate sector cache */
#if _FS_RPATH
fs->cdir = 0; /* Current directory (root dir) */
#endif
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 */
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;
ENTER_FF(fs); /* Lock file system */
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 vol, /* Logical drive number to be mounted/unmounted */
FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
)
{
FATFS *rfs;
if (vol >= _DRIVES) /* Check if the drive number is valid */
return FR_INVALID_DRIVE;
rfs = FatFs[vol]; /* Get current fs object */
if (rfs) {
#if _FS_REENTRANT /* Discard sync object of the current volume */
if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
#endif
rfs->fs_type = 0; /* Clear old fs object */
}
if (fs) {
fs->fs_type = 0; /* Clear new fs object */
#if _FS_REENTRANT /* Create sync object for the new volume */
if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
#endif
}
FatFs[vol] = fs; /* Register new fs object */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Open or Create a File */
/*-----------------------------------------------------------------------*/
FRESULT f_open (
FIL *fp, /* Pointer to the blank file object */
const XCHAR *path, /* Pointer to the file name */
BYTE mode /* Access mode and file open mode flags */
)
{
FRESULT res;
eDIR dj;
NAMEBUF(sfn, lfn);
BYTE *dir;
fp->fs = NULL; /* Clear file object */
#if !_FS_READONLY
mode &= (FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW);
res = chk_mounted(&path, &dj.fs, (BYTE)(mode & (FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)));
#else
mode &= FA_READ;
res = chk_mounted(&path, &dj.fs, 0);
#endif
if (res != FR_OK) LEAVE_FF(dj.fs, res);
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
#if !_FS_READONLY
/* Create or Open a file */
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
DWORD ps, cl;
if (res != FR_OK) { /* No file, create new */
if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
res = dir_register(&dj);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
mode |= FA_CREATE_ALWAYS;
dir = dj.dir; /* Created entry (SFN entry) */
}
else { /* Any object is already existing */
if (mode & FA_CREATE_NEW) /* Cannot create new */
LEAVE_FF(dj.fs, FR_EXIST);
dir = dj.dir;
if (!dir || (dir[DIR_Attr] & (AM_RDO | AM_DIR))) /* Cannot overwrite it (R/O or DIR) */
LEAVE_FF(dj.fs, FR_DENIED);
if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero on over write mode */
cl = ((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->wflag = 1;
ps = dj.fs->winsect; /* Remove the cluster chain */
if (cl) {
res = remove_chain(dj.fs, cl);
if (res) LEAVE_FF(dj.fs, res);
dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
}
res = move_window(dj.fs, ps);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
}
}
if (mode & FA_CREATE_ALWAYS) {
dir[DIR_Attr] = 0; /* Reset attribute */
ps = get_fattime();
ST_DWORD(dir+DIR_CrtTime, ps); /* Created time */
dj.fs->wflag = 1;
mode |= FA__WRITTEN; /* Set file changed flag */
}
}
/* Open an existing file */
else {
#endif /* !_FS_READONLY */
if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
dir = dj.dir;
if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
LEAVE_FF(dj.fs, FR_NO_FILE);
#if !_FS_READONLY
if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
LEAVE_FF(dj.fs, FR_DENIED);
}
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
fp->dir_ptr = dj.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->dsect = 0;
fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
LEAVE_FF(dj.fs, 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 clst, sect, remain;
UINT rcnt, cc;
BYTE *rbuff = (BYTE *)buff;
*br = 0; /* Initialize bytes read */
res = validate(fp->fs, fp->id); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->flag & FA__ERROR) /* Check abort flag */
LEAVE_FF(fp->fs, FR_INT_ERR);
if (!(fp->flag & FA_READ)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
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? */
clst = (fp->fptr == 0) ? /* On the top of the file? */
fp->org_clust : get_fat(fp->fs, fp->curr_clust);
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->curr_clust = clst; /* Update current cluster */
fp->csect = 0; /* Reset sector offset in the cluster */
}
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += fp->csect;
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)
ABORT(fp->fs, FR_DISK_ERR);
#if !_FS_READONLY && _FS_MINIMIZE <= 2
#if _FS_TINY
if (fp->fs->wflag && fp->fs->winsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
#else
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
#endif
#endif
fp->csect += (BYTE)cc; /* Next sector address in the cluster */
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
if (fp->dsect != sect) { /* Fill sector buffer with file data */
if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = sect;
fp->csect++; /* Next sector address in the cluster */
}
rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
if (rcnt > btr) rcnt = btr;
#if _FS_TINY
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#else
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#endif
}
LEAVE_FF(fp->fs, FR_OK);
}
#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 clst, sect;
UINT wcnt, cc;
const BYTE *wbuff = (const BYTE *)buff;
*bw = 0; /* Initialize bytes written */
res = validate(fp->fs, fp->id); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->flag & FA__ERROR) /* Check abort flag */
LEAVE_FF(fp->fs, FR_INT_ERR);
if (!(fp->flag & FA_WRITE)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
if (fp->fsize + btw < fp->fsize) btw = 0; /* 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? */
clst = fp->org_clust; /* Follow from the origin */
if (clst == 0) /* When there is no cluster chain, */
fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
} else { /* Middle or end of the file */
clst = create_chain(fp->fs, fp->curr_clust); /* Follow or streach cluster chain */
}
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->curr_clust = clst; /* Update current cluster */
fp->csect = 0; /* Reset sector address in the cluster */
}
#if _FS_TINY
if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
ABORT(fp->fs, FR_DISK_ERR);
#else
if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += fp->csect;
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)
ABORT(fp->fs, FR_DISK_ERR);
#if _FS_TINY
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->fs->wflag = 0;
}
#else
if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->flag &= ~FA__DIRTY;
}
#endif
fp->csect += (BYTE)cc; /* Next sector address in the cluster */
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if _FS_TINY
if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
fp->fs->winsect = sect;
}
#else
if (fp->dsect != sect) { /* Fill sector buffer with file data */
if (fp->fptr < fp->fsize &&
disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = 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;
#if _FS_TINY
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->fs->wflag = 1;
#else
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->flag |= FA__DIRTY;
#endif
}
if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
fp->flag |= FA__WRITTEN; /* Set file changed flag */
LEAVE_FF(fp->fs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* 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? */
#if !_FS_TINY /* Write-back dirty buffer */
if (fp->flag & FA__DIRTY) {
if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
LEAVE_FF(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
/* Update the directory entry */
res = move_window(fp->fs, fp->dir_sect);
if (res == FR_OK) {
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 &= ~FA__WRITTEN;
fp->fs->wflag = 1;
res = sync(fp->fs);
}
}
}
LEAVE_FF(fp->fs, 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 = validate(fp->fs, fp->id);
if (res == FR_OK) fp->fs = NULL;
LEAVE_FF(fp->fs, res);
#else
res = f_sync(fp);
if (res == FR_OK) fp->fs = NULL;
return res;
#endif
}
/*-----------------------------------------------------------------------*/
/* Change Current Drive/Directory */
/*-----------------------------------------------------------------------*/
#if _FS_RPATH
FRESULT f_chdrive (
BYTE drv /* Drive number */
)
{
if (drv >= _DRIVES) return FR_INVALID_DRIVE;
Drive = drv;
return FR_OK;
}
FRESULT f_chdir (
const XCHAR *path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
NAMEBUF(sfn, lfn);
BYTE *dir;
res = chk_mounted(&path, &dj.fs, 0);
if (res == FR_OK) {
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (res == FR_OK) { /* Follow completed */
dir = dj.dir; /* Pointer to the entry */
if (!dir) {
dj.fs->cdir = 0; /* No entry (root dir) */
} else {
if (dir[DIR_Attr] & AM_DIR) /* Reached to the dir */
dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
else
res = FR_NO_PATH; /* Could not reach the dir (it is a file) */
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
LEAVE_FF(dj.fs, res);
}
#endif
#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 clst, bcs, nsect, ifptr;
res = validate(fp->fs, fp->id); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->flag & FA__ERROR) /* Check abort flag */
LEAVE_FF(fp->fs, FR_INT_ERR);
// if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
//#if !_FS_READONLY /* LAJ: Always clip offset with file size */
// && !(fp->flag & FA_WRITE)
//#endif
if (ofs > fp->fsize)
ofs = fp->fsize; /* LAJ: Always clip offset with file size */
ifptr = fp->fptr;
fp->fptr = nsect = 0; fp->csect = 255;
if (ofs > 0) {
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
if (ifptr > 0 &&
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
ofs -= fp->fptr;
clst = fp->curr_clust;
} else { /* When seek to back cluster, */
clst = fp->org_clust; /* start from the first cluster */
#if !_FS_READONLY
if (clst == 0) { /* If no cluster chain, create a new chain */
clst = create_chain(fp->fs, 0);
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->org_clust = clst;
}
#endif
fp->curr_clust = clst;
}
if (clst != 0) {
while (ofs > bcs) { /* Cluster following loop */
#if !_FS_READONLY
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
clst = create_chain(fp->fs, clst); /* Force streached if in write mode */
if (clst == 0) { /* When disk gets full, clip file size */
ofs = bcs; break;
}
} else
#endif
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
if (clst <= 1 || clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR);
fp->curr_clust = clst;
fp->fptr += bcs;
ofs -= bcs;
}
fp->fptr += ofs;
fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */
if (ofs % SS(fp->fs)) {
nsect = clust2sect(fp->fs, clst); /* Current sector */
if (!nsect) ABORT(fp->fs, FR_INT_ERR);
nsect += fp->csect;
fp->csect++;
}
}
}
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */
if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
#endif
fp->dsect = nsect;
}
#if !_FS_READONLY
if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
fp->fsize = fp->fptr;
fp->flag |= FA__WRITTEN;
}
#endif
LEAVE_FF(fp->fs, res);
}
#if _FS_MINIMIZE <= 1
/*-----------------------------------------------------------------------*/
/* Create a Directroy Object */
/*-----------------------------------------------------------------------*/
FRESULT f_opendir (
eDIR *dj, /* Pointer to directory object to create */
const XCHAR *path /* Pointer to the directory path */
)
{
FRESULT res;
NAMEBUF(sfn, lfn);
BYTE *dir;
res = chk_mounted(&path, &dj->fs, 0);
if (res == FR_OK) {
INITBUF((*dj), sfn, lfn);
res = follow_path(dj, path); /* Follow the path to the directory */
if (res == FR_OK) { /* Follow completed */
dir = dj->dir;
if (dir) { /* It is not the root dir */
if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
} else { /* The object is not a directory */
res = FR_NO_PATH;
}
}
if (res == FR_OK) {
dj->id = dj->fs->id;
res = dir_seek(dj, 0); /* Rewind dir */
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
LEAVE_FF(dj->fs, res);
}
/*-----------------------------------------------------------------------*/
/* Read Directory Entry in Sequense */
/*-----------------------------------------------------------------------*/
FRESULT f_readdir (
eDIR *dj, /* Pointer to the open directory object */
FILINFO *fno /* Pointer to file information to return */
)
{
FRESULT res;
NAMEBUF(sfn, lfn);
res = validate(dj->fs, dj->id); /* Check validity of the object */
if (res == FR_OK) {
INITBUF((*dj), sfn, lfn);
if (!fno) {
res = dir_seek(dj, 0);
} 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, FALSE); /* Increment index for next */
if (res == FR_NO_FILE) {
dj->sect = 0;
res = FR_OK;
}
}
}
}
LEAVE_FF(dj->fs, res);
}
#if _FS_MINIMIZE == 0
/*-----------------------------------------------------------------------*/
/* Get File Status */
/*-----------------------------------------------------------------------*/
FRESULT f_stat (
const XCHAR *path, /* Pointer to the file path */
FILINFO *fno /* Pointer to file information to return */
)
{
FRESULT res;
eDIR dj;
NAMEBUF(sfn, lfn);
res = chk_mounted(&path, &dj.fs, 0);
if (res == FR_OK) {
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (res == FR_OK) { /* Follwo completed */
if (dj.dir) /* Found an object */
get_fileinfo(&dj, fno);
else /* It is root dir */
res = FR_INVALID_NAME;
}
}
LEAVE_FF(dj.fs, res);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Get Number of Free Clusters */
/*-----------------------------------------------------------------------*/
FRESULT f_getfree (
const XCHAR *path, /* Pointer to the logical drive number (root dir) */
DWORD *nclst, /* 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, clst, sect, stat;
UINT i;
BYTE fat, *p;
/* Get drive number */
res = chk_mounted(&path, fatfs, 0);
if (res != FR_OK) LEAVE_FF(*fatfs, res);
/* If number of free cluster is valid, return it without cluster scan. */
if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) {
*nclst = (*fatfs)->free_clust;
LEAVE_FF(*fatfs, FR_OK);
}
/* Get number of free clusters */
fat = (*fatfs)->fs_type;
n = 0;
if (fat == FS_FAT12) {
clst = 2;
do {
stat = get_fat(*fatfs, clst);
if (stat == 0xFFFFFFFF) LEAVE_FF(*fatfs, FR_DISK_ERR);
if (stat == 1) LEAVE_FF(*fatfs, FR_INT_ERR);
if (stat == 0) n++;
} while (++clst < (*fatfs)->max_clust);
} else {
clst = (*fatfs)->max_clust;
sect = (*fatfs)->fatbase;
i = 0; p = 0;
do {
if (!i) {
res = move_window(*fatfs, sect++);
if (res != FR_OK)
LEAVE_FF(*fatfs, res);
p = (*fatfs)->win;
i = SS(*fatfs);
}
if (fat == FS_FAT16) {
if (LD_WORD(p) == 0) n++;
p += 2; i -= 2;
} else {
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
p += 4; i -= 4;
}
} while (--clst);
}
(*fatfs)->free_clust = n;
if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
*nclst = n;
LEAVE_FF(*fatfs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* 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) LEAVE_FF(fp->fs, res);
if (fp->flag & FA__ERROR) /* Check abort flag */
LEAVE_FF(fp->fs, FR_INT_ERR);
if (!(fp->flag & FA_WRITE)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
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 */
res = remove_chain(fp->fs, fp->org_clust);
fp->org_clust = 0;
} else { /* When truncate a part of the file, remove remaining clusters */
ncl = get_fat(fp->fs, fp->curr_clust);
res = FR_OK;
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
if (ncl == 1) res = FR_INT_ERR;
if (res == FR_OK && ncl < fp->fs->max_clust) {
res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
if (res == FR_OK) res = remove_chain(fp->fs, ncl);
}
}
}
if (res != FR_OK) fp->flag |= FA__ERROR;
LEAVE_FF(fp->fs, res);
}
/*-----------------------------------------------------------------------*/
/* Delete a File or Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_unlink (
const XCHAR *path /* Pointer to the file or directory path */
)
{
FRESULT res;
eDIR dj, sdj;
NAMEBUF(sfn, lfn);
BYTE *dir;
DWORD dclst;
res = chk_mounted(&path, &dj.fs, 1);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
res = FR_INVALID_NAME;
if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
dir = dj.dir;
if (!dir) /* Is it the root directory? */
LEAVE_FF(dj.fs, FR_INVALID_NAME);
if (dir[DIR_Attr] & AM_RDO) /* Is it a R/O object? */
LEAVE_FF(dj.fs, FR_DENIED);
dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) | LD_WORD(dir+DIR_FstClusLO);
if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR);
mem_cpy(&sdj, &dj, sizeof(eDIR)); /* Check if the sub-dir is empty or not */
sdj.sclust = dclst;
res = dir_seek(&sdj, 2);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
res = dir_read(&sdj);
if (res == FR_OK) res = FR_DENIED; /* Not empty sub-dir */
if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res);
}
res = dir_remove(&dj); /* Remove directory entry */
if (res == FR_OK) {
if (dclst)
res = remove_chain(dj.fs, dclst); /* Remove the cluster chain */
if (res == FR_OK) res = sync(dj.fs);
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Create a Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_mkdir (
const XCHAR *path /* Pointer to the directory path */
)
{
FRESULT res;
eDIR dj;
NAMEBUF(sfn, lfn);
BYTE *dir, n;
DWORD dsect, dclst, pclst, tim;
res = chk_mounted(&path, &dj.fs, 1);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (res == FR_OK) res = FR_EXIST; /* Any file or directory is already existing */
if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
res = FR_INVALID_NAME;
if (res != FR_NO_FILE) /* Any error occured */
LEAVE_FF(dj.fs, res);
dclst = create_chain(dj.fs, 0); /* Allocate a new cluster for new directory table */
res = FR_OK;
if (dclst == 0) res = FR_DENIED;
if (dclst == 1) res = FR_INT_ERR;
if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR;
if (res == FR_OK)
res = move_window(dj.fs, 0);
if (res != FR_OK) LEAVE_FF(dj.fs, res);
dsect = clust2sect(dj.fs, dclst);
dir = dj.fs->win; /* Initialize the new directory table */
mem_set(dir, 0, SS(dj.fs));
mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
dir[DIR_Name] = '.';
dir[DIR_Attr] = AM_DIR;
tim = get_fattime();
ST_DWORD(dir+DIR_WrtTime, tim);
ST_WORD(dir+DIR_FstClusLO, dclst);
ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
mem_cpy(dir+32, dir, 32); /* Create ".." entry */
dir[33] = '.';
pclst = dj.sclust;
if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase)
pclst = 0;
ST_WORD(dir+32+DIR_FstClusLO, pclst);
ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16);
for (n = 0; n < dj.fs->csize; n++) { /* Write dot entries and clear left sectors */
dj.fs->winsect = dsect++;
dj.fs->wflag = 1;
res = move_window(dj.fs, 0);
if (res) LEAVE_FF(dj.fs, res);
mem_set(dir, 0, SS(dj.fs));
}
res = dir_register(&dj);
if (res != FR_OK) {
remove_chain(dj.fs, dclst);
} else {
dir = dj.dir;
dir[DIR_Attr] = AM_DIR; /* Attribute */
ST_DWORD(dir+DIR_WrtTime, tim); /* Crated time */
ST_WORD(dir+DIR_FstClusLO, dclst); /* Table start cluster */
ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
dj.fs->wflag = 1;
res = sync(dj.fs);
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change File Attribute */
/*-----------------------------------------------------------------------*/
FRESULT f_chmod (
const XCHAR *path, /* Pointer to the file path */
BYTE value, /* Attribute bits */
BYTE mask /* Attribute mask to change */
)
{
FRESULT res;
eDIR dj;
NAMEBUF(sfn, lfn);
BYTE *dir;
res = chk_mounted(&path, &dj.fs, 1);
if (res == FR_OK) {
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
res = FR_INVALID_NAME;
if (res == FR_OK) {
dir = dj.dir;
if (!dir) { /* Is it a root directory? */
res = FR_INVALID_NAME;
} else { /* File or sub directory */
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 */
dj.fs->wflag = 1;
res = sync(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change Timestamp */
/*-----------------------------------------------------------------------*/
FRESULT f_utime (
const XCHAR *path, /* Pointer to the file/directory name */
const FILINFO *fno /* Pointer to the timestamp to be set */
)
{
FRESULT res;
eDIR dj;
NAMEBUF(sfn, lfn);
BYTE *dir;
res = chk_mounted(&path, &dj.fs, 1);
if (res == FR_OK) {
INITBUF(dj, sfn, lfn);
res = follow_path(&dj, path); /* Follow the file path */
if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
res = FR_INVALID_NAME;
if (res == FR_OK) {
dir = dj.dir;
if (!dir) { /* Root directory */
res = FR_INVALID_NAME;
} else { /* File or sub-directory */
ST_WORD(dir+DIR_WrtTime, fno->ftime);
ST_WORD(dir+DIR_WrtDate, fno->fdate);
dj.fs->wflag = 1;
res = sync(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Rename File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_rename (
const XCHAR *path_old, /* Pointer to the old name */
const XCHAR *path_new /* Pointer to the new name */
)
{
FRESULT res;
eDIR dj_old, dj_new;
NAMEBUF(sfn, lfn);
BYTE buf[21], *dir;
DWORD dw;
INITBUF(dj_old, sfn, lfn);
res = chk_mounted(&path_old, &dj_old.fs, 1);
if (res == FR_OK) {
dj_new.fs = dj_old.fs;
res = follow_path(&dj_old, path_old); /* Check old object */
if (_FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT))
res = FR_INVALID_NAME;
}
if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */
if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE); /* Is root dir? */
mem_cpy(buf, dj_old.dir+DIR_Attr, 21); /* Save the object information */
mem_cpy(&dj_new, &dj_old, sizeof(eDIR));
res = follow_path(&dj_new, path_new); /* Check new object */
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
res = dir_register(&dj_new); /* Register the new object */
if (res == FR_OK) {
dir = dj_new.dir; /* Copy object information into new entry */
mem_cpy(dir+13, buf+2, 19);
dir[DIR_Attr] = buf[0] | AM_ARC;
dj_old.fs->wflag = 1;
if (dir[DIR_Attr] & AM_DIR) { /* Update .. entry in the directory if needed */
dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) | LD_WORD(dir+DIR_FstClusLO));
if (!dw) {
res = FR_INT_ERR;
} else {
res = move_window(dj_new.fs, dw);
dir = dj_new.fs->win+32;
if (res == FR_OK && dir[1] == '.') {
dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust;
ST_WORD(dir+DIR_FstClusLO, dw);
ST_WORD(dir+DIR_FstClusHI, dw >> 16);
dj_new.fs->wflag = 1;
}
}
}
if (res == FR_OK) {
res = dir_remove(&dj_old); /* Remove old entry */
if (res == FR_OK)
res = sync(dj_old.fs);
}
}
}
LEAVE_FF(dj_old.fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _FS_MINIMIZE == 0 */
#endif /* _FS_MINIMIZE <= 1 */
#endif /* _FS_MINIMIZE <= 2 */
/*-----------------------------------------------------------------------*/
/* Forward data to the stream directly (Available on only _FS_TINY cfg) */
/*-----------------------------------------------------------------------*/
#if _USE_FORWARD && _FS_TINY
FRESULT f_forward (
FIL *fp, /* Pointer to the file object */
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
UINT btr, /* Number of bytes to forward */
UINT *bf /* Pointer to number of bytes forwarded */
)
{
FRESULT res;
DWORD remain, clst, sect;
UINT rcnt;
*bf = 0;
res = validate(fp->fs, fp->id); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->flag & FA__ERROR) /* Check error flag */
LEAVE_FF(fp->fs, FR_INT_ERR);
if (!(fp->flag & FA_READ)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
remain = fp->fsize - fp->fptr;
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
for ( ; btr && (*func)(NULL, 0); /* Repeat until all data transferred or stream becomes busy */
fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
clst = (fp->fptr == 0) ? /* On the top of the file? */
fp->org_clust : get_fat(fp->fs, fp->curr_clust);
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->curr_clust = clst; /* Update current cluster */
fp->csect = 0; /* Reset sector address in the cluster */
}
fp->csect++; /* Next sector address in the cluster */
}
sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += fp->csect - 1;
if (move_window(fp->fs, sect)) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
fp->dsect = sect;
rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
if (rcnt > btr) rcnt = btr;
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
}
LEAVE_FF(fp->fs, FR_OK);
}
#endif /* _USE_FORWARD */
#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 131072000UL /* 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] */
)
{
static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 };
static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 };
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_clst, d, n;
WORD as;
FATFS *fs;
DSTATUS stat;
/* Check validity of the parameters */
if (drv >= _DRIVES) return FR_INVALID_DRIVE;
if (partition >= 2) 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 _MAX_SS != 512 /* Get disk sector size */
if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
|| SS(fs) > _MAX_SS)
return FR_MKFS_ABORTED;
#endif
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;
for (d = 512; d <= 32768U && d != allocsize; d <<= 1) ; /* Check validity of the allocation unit size */
if (d != allocsize) allocsize = 0;
if (!allocsize) { /* Auto selection of cluster size */
d = n_part;
for (as = SS(fs); as > 512U; as >>= 1) d >>= 1;
for (n = 0; d < sstbl[n]; n++) ;
allocsize = cstbl[n];
}
if (allocsize < SS(fs)) allocsize = SS(fs);
allocsize /= SS(fs); /* Number of sectors per cluster */
/* Pre-compute number of clusters and FAT type */
n_clst = n_part / allocsize;
fmt = FS_FAT12;
if (n_clst >= 0xFF5) fmt = FS_FAT16;
if (n_clst >= 0xFFF5) fmt = FS_FAT32;
/* Determine offset and size of FAT structure */
switch (fmt) {
case FS_FAT12:
n_fat = ((n_clst * 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_clst * 2) + 4 + SS(fs) - 1) / SS(fs);
n_rsv = 1 + partition;
n_dir = N_ROOTDIR * 32 / SS(fs);
break;
default:
n_fat = ((n_clst * 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_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
if ( (fmt == FS_FAT16 && n_clst < 0xFF5)
|| (fmt == FS_FAT32 && n_clst < 0xFFF5))
return FR_MKFS_ABORTED;
/* Create partition table if needed */
if (!partition) {
DWORD n_disk = b_part + n_part;
mem_set(fs->win, 0, SS(fs));
tbl = fs->win+MBR_Table;
ST_DWORD(tbl, 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_DISK_ERR;
partition = 0xF8;
} else {
partition = 0xF0;
}
/* Create boot record */
tbl = fs->win; /* Clear buffer */
mem_set(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] = partition; /* 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 */
mem_cpy(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 offset (bs+1) */
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (bs+6) */
tbl[BS_DrvNum32] = 0x80; /* Drive number */
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */
}
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature */
if (SS(fs) > 512U) {
ST_WORD(tbl+SS(fs)-2, 0xAA55);
}
if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
return FR_DISK_ERR;
if (fmt == FS_FAT32)
disk_write(drv, tbl, b_part+6, 1);
/* Initialize FAT area */
for (m = 0; m < N_FATS; m++) {
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
if (fmt != FS_FAT32) {
n = (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
n |= partition;
ST_DWORD(tbl, 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_DISK_ERR;
mem_set(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_DISK_ERR;
}
}
/* Initialize Root directory */
m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
do {
if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
return FR_DISK_ERR;
} 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_clst - 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, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR;
}
#endif /* _USE_MKFS && !_FS_READONLY */
#if _USE_STRFUNC
/*-----------------------------------------------------------------------*/
/* Get a string from the file */
/*-----------------------------------------------------------------------*/
char* f_gets (
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 : NULL; /* When no data read (eof or error), return with error. */
}
#if !_FS_READONLY
#include <stdarg.h>
/*-----------------------------------------------------------------------*/
/* Put a character to the file */
/*-----------------------------------------------------------------------*/
int f_putc (
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') f_putc ('\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 result */
}
/*-----------------------------------------------------------------------*/
/* Put a string to the file */
/*-----------------------------------------------------------------------*/
int f_puts (
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 (f_putc(*str, fil) == EOF) return EOF;
}
return n;
}
/*-----------------------------------------------------------------------*/
/* Put a formatted string to the file */
/*-----------------------------------------------------------------------*/
int f_printf (
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 = f_putc(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 = f_puts(va_arg(arp, char*), fil);
continue;
}
if (c == 'c') { /* Type is character */
cc = f_putc(va_arg(arp, int), 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 = f_puts(&s[i], fil);
}
va_end(arp);
return (cc == EOF) ? cc : res;
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC */