/* Copyright 2011,2012 Jun WAKO This software is licensed with a Modified BSD License. All of this is supposed to be Free Software, Open Source, DFSG-free, GPL-compatible, and OK to use in both free and proprietary applications. Additions and corrections to this file are welcome. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* M0110A Support was contributed by skagon@github */ #include #include #include #include #include "m0110.h" #include "debug.h" static inline uint8_t raw2scan(uint8_t raw); static inline uint8_t inquiry(void); static inline uint8_t instant(void); static inline void clock_lo(void); static inline void clock_hi(void); static inline bool clock_in(void); static inline void data_lo(void); static inline void data_hi(void); static inline bool data_in(void); static inline uint16_t wait_clock_lo(uint16_t us); static inline uint16_t wait_clock_hi(uint16_t us); static inline uint16_t wait_data_lo(uint16_t us); static inline uint16_t wait_data_hi(uint16_t us); static inline void idle(void); static inline void request(void); #define WAIT_US(stat, us, err) do { \ if (!wait_##stat(us)) { \ m0110_error = err; \ goto ERROR; \ } \ } while (0) #define WAIT_MS(stat, ms, err) do { \ uint16_t _ms = ms; \ while (_ms) { \ if (wait_##stat(1000)) { \ break; \ } \ _ms--; \ } \ if (_ms == 0) { \ m0110_error = err; \ goto ERROR; \ } \ } while (0) #define KEY(raw) ((raw) & 0x7f) #define IS_BREAK(raw) (((raw) & 0x80) == 0x80) uint8_t m0110_error = 0; void m0110_init(void) { idle(); _delay_ms(1000); /* Not needed to initialize in fact. uint8_t data; m0110_send(M0110_MODEL); data = m0110_recv(); print("m0110_init model: "); phex(data); print("\n"); m0110_send(M0110_TEST); data = m0110_recv(); print("m0110_init test: "); phex(data); print("\n"); */ } uint8_t m0110_send(uint8_t data) { m0110_error = 0; request(); WAIT_MS(clock_lo, 250, 1); // keyboard may block long time for (uint8_t bit = 0x80; bit; bit >>= 1) { WAIT_US(clock_lo, 250, 3); if (data&bit) { data_hi(); } else { data_lo(); } WAIT_US(clock_hi, 200, 4); } _delay_us(100); // hold last bit for 80us idle(); return 1; ERROR: print("m0110_send err: "); phex(m0110_error); print("\n"); _delay_ms(500); idle(); return 0; } uint8_t m0110_recv(void) { uint8_t data = 0; m0110_error = 0; WAIT_MS(clock_lo, 250, 1); // keyboard may block long time for (uint8_t i = 0; i < 8; i++) { data <<= 1; WAIT_US(clock_lo, 200, 2); WAIT_US(clock_hi, 200, 3); if (data_in()) { data |= 1; } } idle(); return data; ERROR: print("m0110_recv err: "); phex(m0110_error); print("\n"); _delay_ms(500); idle(); return 0xFF; } /* Handling for exceptional case of key combinations for M0110A Shift and Calc/Arrow key could be operated simultaneously: Case Shift Arrow Events Interpret ------------------------------------------------------------------- 1 Down Down 71, 79, DD Calc(d)*a *b 2 Down Up 71, 79, UU Arrow&Calc(u)*a 3 Up Down F1, 79, DD Shift(u) *c 4 Up Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a Case Shift Calc Events Interpret ------------------------------------------------------------------- 5(1) Down Down 71, 71, 79, DD Shift(d) and Cacl(d) 6(2) Down Up F1, 71, 79, UU Shift(u) and Arrow&Calc(u)*a 7(1) Up Down F1, 71, 79, DD Shift(u) and Calc(d) 8(4) Up Up F1, F1, 79, UU Shift(ux2) and Arrow&Calc(u)*a During Calc key is hold: Case Shift Arrow Events Interpret ------------------------------------------------------------------- A(3) ---- Down F1, 79, DD Shift(u) *c B ---- Up 79, UU Arrow&Calc(u)*a C Down ---- F1, 71 Shift(u) and Shift(d) D Up ---- F1 Shift(u) E Hold Down 79, DD Normal F Hold Up 79, UU Arrow&Calc(u)*a G(1) Down Down F1, 71, 79, DD Shift(u)*b and Calc(d)*a H(2) Down Up F1, 71, 79, UU Shift(u) and Arrow&Calc(u)*a I(3) Up Down F1, F1, 79, DD Shift(ux2) *c J(4) Up Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a Case Shift Calc Events Interpret ------------------------------------------------------------------- K(1) ---- Down 71, 79, DD Calc(d)*a L(4) ---- Up F1, 79, UU Shift(u) and Arrow&Calc(u)*a M(1) Hold Down 71, 79, DD Calc(d)*a N Hold Up 79, UU Arrow&Calc(u)*a Where DD/UU indicates part of Keypad Down/Up event. *a: Impossible to distinguish btween Arrow and Calc event. *b: Shift(d) event is ignored. *c: Arrow/Calc(d) event is ignored. */ uint8_t m0110_recv_key(void) { static uint8_t keybuf = 0x00; static uint8_t keybuf2 = 0x00; static uint8_t rawbuf = 0x00; uint8_t raw, raw2, raw3; if (keybuf) { raw = keybuf; keybuf = 0x00; return raw; } if (keybuf2) { raw = keybuf2; keybuf2 = 0x00; return raw; } if (rawbuf) { raw = rawbuf; rawbuf = 0x00; } else { raw = instant(); // Use INSTANT for better response. Should be INQUIRY ? } switch (KEY(raw)) { case M0110_KEYPAD: raw2 = instant(); switch (KEY(raw2)) { case M0110_ARROW_UP: case M0110_ARROW_DOWN: case M0110_ARROW_LEFT: case M0110_ARROW_RIGHT: if (IS_BREAK(raw2)) { // Case B,F,N: keybuf = (raw2scan(raw2) | M0110_CALC_OFFSET); // Calc(u) return (raw2scan(raw2) | M0110_KEYPAD_OFFSET); // Arrow(u) } break; } // Keypad or Arrow return (raw2scan(raw2) | M0110_KEYPAD_OFFSET); break; case M0110_SHIFT: raw2 = instant(); switch (KEY(raw2)) { case M0110_SHIFT: // Case: 5-8,C,G,H rawbuf = raw2; return raw2scan(raw); // Shift(d/u) break; case M0110_KEYPAD: // Shift + Arrow, Calc, or etc. raw3 = instant(); switch (KEY(raw3)) { case M0110_ARROW_UP: case M0110_ARROW_DOWN: case M0110_ARROW_LEFT: case M0110_ARROW_RIGHT: if (IS_BREAK(raw)) { if (IS_BREAK(raw3)) { // Case 4: print("(4)\n"); keybuf2 = raw2scan(raw); // Shift(u) keybuf = (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(u) return (raw2scan(raw3) | M0110_KEYPAD_OFFSET); // Arrow(u) } else { // Case 3: print("(3)\n"); return (raw2scan(raw)); // Shift(u) } } else { if (IS_BREAK(raw3)) { // Case 2: print("(2)\n"); keybuf = (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(u) return (raw2scan(raw3) | M0110_KEYPAD_OFFSET); // Arrow(u) } else { // Case 1: print("(1)\n"); return (raw2scan(raw3) | M0110_CALC_OFFSET); // Calc(d) } } break; default: // Shift + Keypad keybuf = (raw2scan(raw3) | M0110_KEYPAD_OFFSET); return raw2scan(raw); // Shift(d/u) break; } break; default: // Shift + Normal keys keybuf = raw2scan(raw2); return raw2scan(raw); // Shift(d/u) break; } break; default: // Normal keys return raw2scan(raw); break; } } static inline uint8_t raw2scan(uint8_t raw) { return (raw == M0110_NULL) ? M0110_NULL : ( (raw == M0110_ERROR) ? M0110_ERROR : ( ((raw&0x80) | ((raw&0x7F)>>1)) ) ); } static inline uint8_t inquiry(void) { m0110_send(M0110_INQUIRY); return m0110_recv(); } static inline uint8_t instant(void) { m0110_send(M0110_INSTANT); uint8_t data = m0110_recv(); if (data != M0110_NULL) { debug_hex(data); debug(" "); } return data; } static inline void clock_lo() { M0110_CLOCK_PORT &= ~(1<HOST: HOST reads bit on rising edge. CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~ DATA ~~~~~~~~~~~~X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~ <--> 160us(clock low) <---> 180us(clock high) 3) HOST->KEYBOARD: HOST asserts bit on falling edge. CLOCK ~~~~~~~~~~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~|__|~~~~~~~~~~~ DATA ~~~~~~|_____X777777X666666X555555X444444X333333X222222X111111X000000X~~~~~~~ <----> 840us(request to send by host) <---> 80us(hold DATA) <--> 180us(clock low) <---> 220us(clock high) Protocol -------- COMMAND: Inquiry 0x10 get key event with block Instant 0x12 get key event Model 0x14 get model number(M0110 responds with 0x09) bit 7 1 if another device connected(used when keypad exists?) bit4-6 next device model number bit1-3 keyboard model number bit 0 always 1 Test 0x16 test(ACK:0x7D/NAK:0x77) KEY EVENT: bit 7 key state(0:press 1:release) bit 6-1 scan code(see below) bit 0 always 1 To get scan code use this: ((bits&(1<<7)) | ((bits&0x7F))>>1). Note: On the M0110A, Keypad keys and Arrow keys are preceded by 0x79. Moreover, some Keypad keys(=, /, * and +) are preceded by 0x71 on press and 0xF1 on release. ARROW KEYS: Arrow keys and Calc keys(+,*,/,= on keypad) share same byte sequence and preceding byte of Calc keys(0x71 and 0xF1) means press and release event of SHIFT. This causes a very confusing situation, it is difficult or impossible to tell Calc key from Arrow key plus SHIFT in some cases. Raw key events: press release ---------------- ---------------- Left: 0x79, 0x0D 0x79, 0x8D Right: 0x79, 0x05 0x79, 0x85 Up: 0x79, 0x1B 0x79, 0x9B Down: 0x79, 0x11
/*---------------------------------------------------------------------------/
/  FatFs - FAT file system module include file  R0.09a    (C)ChaN, 2012
/----------------------------------------------------------------------------/
/ 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 terms.
/
/  Copyright (C) 2012, 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 product UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice.
/
/----------------------------------------------------------------------------*/

#ifndef _FATFS
#define _FATFS	4004	/* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include "integer.h"	/* Basic integer types */
#include "ffconf.h"		/* FatFs configuration options */

#if _FATFS != _FFCONF
#error Wrong configuration file (ffconf.h).
#endif



/* Definitions of volume management */

#if _MULTI_PARTITION		/* Multiple partition configuration */
typedef struct {
	BYTE pd;	/* Physical drive number */
	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */
} PARTITION;
extern PARTITION VolToPart[];	/* Volume - Partition resolution table */
#define LD2PD(vol) (VolToPart[vol].pd)	/* Get physical drive number */
#define LD2PT(vol) (VolToPart[vol].pt)	/* Get partition index */

#else							/* Single partition configuration */
#define LD2PD(vol) (BYTE)(vol)	/* Each logical drive is bound to the same physical drive number */
#define LD2PT(vol) 0			/* Always mounts the 1st partition or in SFD */

#endif



/* Type of path name strings on FatFs API */

#if _LFN_UNICODE			/* Unicode string */
#if !_USE_LFN
#error _LFN_UNICODE must be 0 in non-LFN cfg.
#endif
#ifndef _INC_TCHAR
typedef WCHAR TCHAR;
#define _T(x) L ## x
#define _TEXT(x) L ## x
#endif

#else						/* ANSI/OEM string */
#ifndef _INC_TCHAR
typedef char TCHAR;
#define _T(x) x
#define _TEXT(x) x
#endif

#endif



/* File system object structure (FATFS) */

typedef struct {
	BYTE	fs_type;		/* FAT sub-type (0:Not mounted) */
	BYTE	drv;			/* Physical drive number */
	BYTE	csize;			/* Sectors per cluster (1,2,4...128) */
	BYTE	n_fats;			/* Number of FAT copies (1,2) */
	BYTE	wflag;			/* win[] dirty flag (1:must be written back) */
	BYTE	fsi_flag;		/* fsinfo dirty flag (1:must be written back) */
	WORD	id;				/* File system mount ID */
	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
#if _MAX_SS != 512
	WORD	ssize;			/* Bytes per sector (512, 1024, 2048 or 4096) */
#endif
#if _FS_REENTRANT
	_SYNC_t	sobj;			/* Identifier of sync object */
#endif
#if !_FS_READONLY
	DWORD	last_clust;		/* Last allocated cluster */
	DWORD	free_clust;		/* Number of free clusters */
	DWORD	fsi_sector;		/* fsinfo sector (FAT32) */
#endif
#if _FS_RPATH
	DWORD	cdir;			/* Current directory start cluster (0:root) */
#endif
	DWORD	n_fatent;		/* Number of FAT entries (= number of clusters + 2) */
	DWORD	fsize;			/* Sectors per FAT */
	DWORD	fatbase;		/* FAT start sector */
	DWORD	dirbase;		/* Root directory start sector (FAT32:Cluster#) */
	DWORD	database;		/* Data start sector */
	DWORD	winsect;		/* Current sector appearing in the win[] */
	BYTE	win[_MAX_SS];	/* Disk access window for Directory, FAT (and Data on tiny cfg) */
} FATFS;



/* File object structure (FIL) */

typedef struct {
	FATFS*	fs;				/* Pointer to the related file system object */
	WORD	id;				/* File system mount ID of the related file system object */
	BYTE	flag;			/* File status flags */
	BYTE	pad1;
	DWORD	fptr;			/* File read/write pointer (0ed on file open) */
	DWORD	fsize;			/* File size */
	DWORD	sclust;			/* File data start cluster (0:no data cluster, always 0 when fsize is 0) */
	DWORD	clust;			/* Current cluster of fpter */
	DWORD	dsect;			/* Current data sector of fpter */
#if !_FS_READONLY
	DWORD	dir_sect;		/* Sector containing the directory entry */
	BYTE*	dir_ptr;		/* Pointer to the directory entry in the window */
#endif
#if _USE_FASTSEEK
	DWORD*	cltbl;			/* Pointer to the cluster link map table (null on file open) */
#endif
#if _FS_LOCK
	UINT	lockid;			/* File lock ID (index of file semaphore table Files[]) */
#endif
#if !_FS_TINY
	BYTE	buf[_MAX_SS];	/* File data read/write buffer */
#endif
} FIL;



/* Directory object structure (DIR) */

typedef struct {
	FATFS*	fs;				/* Pointer to the owner file system object */
	WORD	id;				/* Owner file system mount ID */
	WORD	index;			/* Current read/write index number */
	DWORD	sclust;			/* Table start cluster (0:Root dir) */
	DWORD	clust;			/* Current cluster */
	DWORD	sect;			/* Current sector */
	BYTE*	dir;			/* Pointer to the current SFN entry in the win[] */
	BYTE*	fn;				/* Pointer to the SFN (in/out) {file[8],ext[3],status[1]} */
#if _USE_LFN
	WCHAR*	lfn;			/* Pointer to the LFN working buffer */
	WORD	lfn_idx;		/* Last matched LFN index number (0xFFFF:No LFN) */
#endif
} DIR;



/* File status structure (FILINFO) */

typedef struct {
	DWORD	fsize;			/* File size */
	WORD	fdate;			/* Last modified date */
	WORD	ftime;			/* Last modified time */
	BYTE	fattrib;		/* Attribute */
	TCHAR	fname[13];		/* Short file name (8.3 format) */
#if _USE_LFN
	TCHAR*	lfname;			/* Pointer to the LFN buffer */
	UINT 	lfsize;			/* Size of LFN buffer in TCHAR */
#endif
} FILINFO;



/* File function return code (FRESULT) */

typedef enum {
	FR_OK = 0,				/* (0) Succeeded */
	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
	FR_INT_ERR,				/* (2) Assertion failed */
	FR_NOT_READY,			/* (3) The physical drive cannot work */
	FR_NO_FILE,				/* (4) Could not find the file */
	FR_NO_PATH,				/* (5) Could not find the path */
	FR_INVALID_NAME,		/* (6) The path name format is invalid */
	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
	FR_EXIST,				/* (8) Access denied due to prohibited access */
	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
	FR_NOT_ENABLED,			/* (12) The volume has no work area */
	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any parameter error */
	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */
	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > _FS_SHARE */
	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
} FRESULT;



/*--------------------------------------------------------------*/
/* FatFs module application interface                           */

FRESULT f_mount (BYTE, FATFS*);						/* Mount/Unmount a logical drive */
FRESULT f_open (FIL*, const TCHAR*, BYTE);			/* Open or create a file */
FRESULT f_read (FIL*, void*, UINT, UINT*);			/* Read data from a file */
FRESULT f_lseek (FIL*, DWORD);						/* Move file pointer of a file object */
FRESULT f_close (FIL*);								/* Close an open file object */
FRESULT f_opendir (DIR*, const TCHAR*);				/* Open an existing directory */
FRESULT f_readdir (DIR*, FILINFO*);					/* Read a directory item */
FRESULT f_stat (const TCHAR*, FILINFO*);			/* Get file status */
FRESULT f_write (FIL*, const void*, UINT, UINT*);	/* Write data to a file */
FRESULT f_getfree (const TCHAR*, DWORD*, FATFS**);	/* Get number of free clusters on the drive */
FRESULT f_truncate (FIL*);							/* Truncate file */
FRESULT f_sync (FIL*);								/* Flush cached data of a writing file */
FRESULT f_unlink (const TCHAR*);					/* Delete an existing file or directory */
FRESULT	f_mkdir (const TCHAR*);						/* Create a new directory */
FRESULT f_chmod (const TCHAR*, BYTE, BYTE);			/* Change attribute of the file/dir */
FRESULT f_utime (const TCHAR*, const FILINFO*);		/* Change times-tamp of the file/dir */
FRESULT f_rename (const TCHAR*, const TCHAR*);		/* Rename/Move a file or directory */
FRESULT f_chdrive (BYTE);							/* Change current drive */
FRESULT f_chdir (const TCHAR*);						/* Change current directory */
FRESULT f_getcwd (TCHAR*, UINT);					/* Get current directory */
FRESULT f_forward (FIL*, UINT(*)(const BYTE*,UINT), UINT, UINT*);	/* Forward data to the stream */
FRESULT f_mkfs (BYTE, BYTE, UINT);					/* Create a file system on the drive */
FRESULT	f_fdisk (BYTE, const DWORD[], void*);		/* Divide a physical drive into some partitions */
int f_putc (TCHAR, FIL*);							/* Put a character to the file */
int f_puts (const TCHAR*, FIL*);					/* Put a string to the file */
int f_printf (FIL*, const TCHAR*, ...);				/* Put a formatted string to the file */
TCHAR* f_gets (TCHAR*, int, FIL*);					/* Get a string from the file */

#define f_eof(fp) (((fp)->fptr == (fp)->fsize) ? 1 : 0)
#define f_error(fp) (((fp)->flag & FA__ERROR) ? 1 : 0)
#define f_tell(fp) ((fp)->fptr)
#define f_size(fp) ((fp)->fsize)

#ifndef EOF
#define EOF (-1)
#endif




/*--------------------------------------------------------------*/
/* Additional user defined functions                            */

/* RTC function */
#if !_FS_READONLY
DWORD get_fattime (void);
#endif

/* Unicode support functions */
#if _USE_LFN						/* Unicode - OEM code conversion */
WCHAR ff_convert (WCHAR, UINT);		/* OEM-Unicode bidirectional conversion */
WCHAR ff_wtoupper (WCHAR);			/* Unicode upper-case conversion */
#if _USE_LFN == 3					/* Memory functions */
void* ff_memalloc (UINT);			/* Allocate memory block */
void ff_memfree (void*);			/* Free memory block */
#endif
#endif

/* Sync functions */
#if _FS_REENTRANT
int ff_cre_syncobj (BYTE, _SYNC_t*);/* Create a sync object */
int ff_req_grant (_SYNC_t);			/* Lock sync object */
void ff_rel_grant (_SYNC_t);		/* Unlock sync object */
int ff_del_syncobj (_SYNC_t);		/* Delete a sync object */
#endif




/*--------------------------------------------------------------*/
/* Flags and offset address                                     */


/* File access control and file status flags (FIL.flag) */

#define	FA_READ				0x01
#define	FA_OPEN_EXISTING	0x00
#define FA__ERROR			0x80

#if !_FS_READONLY
#define	FA_WRITE			0x02
#define	FA_CREATE_NEW		0x04
#define	FA_CREATE_ALWAYS	0x08
#define	FA_OPEN_ALWAYS		0x10
#define FA__WRITTEN			0x20
#define FA__DIRTY			0x40
#endif


/* FAT sub type (FATFS.fs_type) */

#define FS_FAT12	1
#define FS_FAT16	2
#define FS_FAT32	3


/* File attribute bits for directory entry */

#define	AM_RDO	0x01	/* Read only */
#define	AM_HID	0x02	/* Hidden */
#define	AM_SYS	0x04	/* System */
#define	AM_VOL	0x08	/* Volume label */
#define AM_LFN	0x0F	/* LFN entry */
#define AM_DIR	0x10	/* Directory */
#define AM_ARC	0x20	/* Archive */
#define AM_MASK	0x3F	/* Mask of defined bits */


/* Fast seek feature */
#define CREATE_LINKMAP	0xFFFFFFFF



/*--------------------------------*/
/* Multi-byte word access macros  */

#if _WORD_ACCESS == 1	/* Enable word access to the FAT structure */
#define	LD_WORD(ptr)		(WORD)(*(WORD*)(BYTE*)(ptr))
#define	LD_DWORD(ptr)		(DWORD)(*(DWORD*)(BYTE*)(ptr))
#define	ST_WORD(ptr,val)	*(WORD*)(BYTE*)(ptr)=(WORD)(val)
#define	ST_DWORD(ptr,val)	*(DWORD*)(BYTE*)(ptr)=(DWORD)(val)
#else					/* Use byte-by-byte access to the FAT structure */
#define	LD_WORD(ptr)		(WORD)(((WORD)*((BYTE*)(ptr)+1)<<8)|(WORD)*(BYTE*)(ptr))
#define	LD_DWORD(ptr)		(DWORD)(((DWORD)*((BYTE*)(ptr)+3)<<24)|((DWORD)*((BYTE*)(ptr)+2)<<16)|((WORD)*((BYTE*)(ptr)+1)<<8)|*(BYTE*)(ptr))
#define	ST_WORD(ptr,val)	*(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8)
#define	ST_DWORD(ptr,val)	*(BYTE*)(ptr)=(BYTE)(val); *((BYTE*)(ptr)+1)=(BYTE)((WORD)(val)>>8); *((BYTE*)(ptr)+2)=(BYTE)((DWORD)(val)>>16); *((BYTE*)(ptr)+3)=(BYTE)((DWORD)(val)>>24)
#endif

#ifdef __cplusplus
}
#endif

#endif /* _FATFS */
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-23 21:44:11 +0000