main__.c

this program for sd mmc card in fat file system

				if (!xmit_datablock(buff, 0xFC)) break;
				buff += 512;
			} while (--count);
			if (!xmit_datablock(0, 0xFD))	/* STOP_TRAN token */
				count = 1;
		}
	}
	release_spi();

	return count ? RES_ERROR : RES_OK;
}
#endif /* _READONLY == 0 */



/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

#if _USE_IOCTL != 0
DRESULT disk_ioctl (
	BYTE drv,		/* Physical drive nmuber (0) */
	BYTE ctrl,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
	DRESULT res;
	BYTE n, csd[16], *ptr = buff;
	WORD csize;


	if (drv) return RES_PARERR;

	res = RES_ERROR;

	if (ctrl == CTRL_POWER) {
		switch (*ptr) {
		case 0:		/* Sub control code == 0 (POWER_OFF) */
			if (chk_power())
				power_off();		/* Power off */
			res = RES_OK;
			break;
		case 1:		/* Sub control code == 1 (POWER_ON) */
			power_on();				/* Power on */
			res = RES_OK;
			break;
		case 2:		/* Sub control code == 2 (POWER_GET) */
			*(ptr+1) = (BYTE)chk_power();
			res = RES_OK;
			break;
		default :
			res = RES_PARERR;
		}
	}
	else {
		if (Stat & STA_NOINIT) return RES_NOTRDY;

		switch (ctrl) {
		case CTRL_SYNC :		/* Make sure that no pending write process */
			SELECT();
			if (wait_ready() == 0xFF)
				res = RES_OK;
			break;

		case GET_SECTOR_COUNT :	/* Get number of sectors on the disk (DWORD) */
			if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
				if ((csd[0] >> 6) == 1) {	/* SDC ver 2.00 */
					csize = csd[9] + ((WORD)csd[8] << 8) + 1;
					*(DWORD*)buff = (DWORD)csize << 10;
				} else {					/* SDC ver 1.XX or MMC*/
					n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
					csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
					*(DWORD*)buff = (DWORD)csize << (n - 9);
				}
				res = RES_OK;
			}
			break;

		case GET_SECTOR_SIZE :	/* Get R/W sector size (WORD) */
			*(WORD*)buff = 512;
			res = RES_OK;
			break;

		case GET_BLOCK_SIZE :	/* Get erase block size in unit of sector (DWORD) */
			if (CardType & 4) {			/* SDC ver 2.00 */
				if (send_cmd(ACMD13, 0) == 0) {		/* Read SD status */
					rcvr_spi();
					if (rcvr_datablock(csd, 16)) {				/* Read partial block */
						for (n = 64 - 16; n; n--) rcvr_spi();	/* Purge trailing data */
						*(DWORD*)buff = 16UL << (csd[10] >> 4);
						res = RES_OK;
					}
				}
			} else {					/* SDC ver 1.XX or MMC */
				if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {	/* Read CSD */
					if (CardType & 2) {			/* SDC ver 1.XX */
#pragma warn-
						*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
					} else {					/* MMC */
						*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
#pragma warn+
					}
					res = RES_OK;
				}
			}
			break;

		case MMC_GET_TYPE :		/* Get card type flags (1 byte) */
			*ptr = CardType;
			res = RES_OK;
			break;

		case MMC_GET_CSD :		/* Receive CSD as a data block (16 bytes) */
			if (send_cmd(CMD9, 0) == 0		/* READ_CSD */
				&& rcvr_datablock(ptr, 16))
				res = RES_OK;
			break;

		case MMC_GET_CID :		/* Receive CID as a data block (16 bytes) */
			if (send_cmd(CMD10, 0) == 0		/* READ_CID */
				&& rcvr_datablock(ptr, 16))
				res = RES_OK;
			break;

		case MMC_GET_OCR :		/* Receive OCR as an R3 resp (4 bytes) */
			if (send_cmd(CMD58, 0) == 0) {	/* READ_OCR */
				for (n = 4; n; n--) *ptr++ = rcvr_spi();
				res = RES_OK;
			}
			break;

		case MMC_GET_SDSTAT :	/* Receive SD statsu as a data block (64 bytes) */
			if (send_cmd(ACMD13, 0) == 0) {	/* SD_STATUS */
				rcvr_spi();
				if (rcvr_datablock(ptr, 64))
					res = RES_OK;
			}
			break;

		default:
			res = RES_PARERR;
		}

		release_spi();
	}

	return res;
}
#endif /* _USE_IOCTL != 0 */


/*-----------------------------------------------------------------------*/
/* Device Timer Interrupt Procedure  (Platform dependent)                */
/*-----------------------------------------------------------------------*/
/* This function must be called in period of 10ms                        */

void disk_timerproc (void)
{
	static BYTE pv;
	BYTE n, s;


	n = Timer1;						/* 100Hz decrement timer */
	if (n) Timer1 = --n;
	n = Timer2;
	if (n) Timer2 = --n;

	n = pv;
	pv = SOCKPORT & (SOCKWP | SOCKINS);	/* Sample socket switch */

	if (n == pv) {					/* Have contacts stabled? */
		s = Stat;

		if (pv & SOCKWP)			/* WP is H (write protected) */
			s |= STA_PROTECT;
		else						/* WP is L (write enabled) */
			s &= ~STA_PROTECT;

		if (pv & SOCKINS)			/* INS = H (Socket empty) */
			s |= (STA_NODISK | STA_NOINIT);
		else						/* INS = L (Card inserted) */
			s &= ~STA_NODISK;

		Stat = s;
	}
}

#include "tff.c"
/*--------------------------------------------------------------------------/
/  FatFs - Tiny FAT file system module  R0.05                 (C)ChaN, 2007
/
/  Ported To CodevisionAVR By Behzad Khazama www.khazama.com Sabzevar-IRAN 2007
/  tff.c current Port ver:1.0
/
/---------------------------------------------------------------------------/
/ The FatFs module is an experimenal project to implement FAT file system to
/ cheap microcontrollers. This is a free software and is opened for education,
/ research and development under license policy of following trems.
/
/  Copyright (C) 2007, ChaN, all right reserved.
/
/ * The FatFs module is a free software and there is no warranty.
/ * You can use, modify and/or redistribute it for personal, non-profit or
/   profit use without any restriction under your responsibility.
/ * Redistributions of source code must retain the above copyright notice.
/
/---------------------------------------------------------------------------/
/  Feb 26, 2006  R0.00  Prototype.
/  Apr 29, 2006  R0.01  First stable version.
/  Jun 01, 2006  R0.02  Added FAT12 support.
/                       Removed unbuffered mode.
/                       Fixed a problem on small (<32M) patition.
/  Jun 10, 2006  R0.02a Added a configuration option (_FS_MINIMUM).
/  Sep 22, 2006  R0.03  Added f_rename().
/                       Changed option _FS_MINIMUM to _FS_MINIMIZE.
/  Dec 09, 2006  R0.03a Improved cluster scan algolithm to write files fast.
/  Feb 04, 2007  R0.04  Added FAT32 supprt.
/                       Changed some interfaces incidental to FatFs.
/                       Changed f_mountdrv() to f_mount().
/  Apr 01, 2007  R0.04a Added a capability of extending file size to f_lseek().
/                       Added minimization level 3.
/                       Fixed a problem in FAT32 support.
/  May 05, 2007  R0.04b Added a configuration option _USE_NTFLAG.
/                       Added FSInfo support.
/                       Fixed some problems corresponds to FAT32 support.
/                       Fixed DBCS name can result FR_INVALID_NAME.
/                       Fixed short seek (<= csize) collapses the file object.
/  Aug 25, 2007  R0.05  Changed arguments of f_read() and f_write().
/---------------------------------------------------------------------------*/

#include <string.h>
#include "tff.h"		/* Tiny-FatFs declarations */
#include "diskio.h"		/* Include file for user provided disk functions */


static
FATFS *FatFs;			/* Pointer to the file system objects (logical drive) */
static
WORD fsid;				/* File system mount ID */


/*-------------------------------------------------------------------------

  Module Private Functions

-------------------------------------------------------------------------*/


/*-----------------------------------------------------------------------*/
/* Change window offset                                                  */
/*-----------------------------------------------------------------------*/

static
BOOL move_window (		/* TRUE: successful, FALSE: failed */
	DWORD sector		/* Sector number to make apperance in the FatFs->win */
)						/* Move to zero only writes back dirty window */
{
	DWORD wsect;
	FATFS *fs = FatFs;


	wsect = fs->winsect;
	if (wsect != sector) {	/* Changed current window */
#if !_FS_READONLY
		BYTE n;
		if (fs->winflag) {	/* Write back dirty window if needed */
			if (disk_write(0, fs->win, wsect, 1) != RES_OK)
				return FALSE;
			fs->winflag = 0;
			if (wsect < (fs->fatbase + fs->sects_fat)) {	/* In FAT area */
				for (n = fs->n_fats; n >= 2; n--) {	/* Refrect the change to all FAT copies */
					wsect += fs->sects_fat;
					disk_write(0, fs->win, wsect, 1);
				}
			}
		}
#endif
		if (sector) {
			if (disk_read(0, fs->win, sector, 1) != RES_OK)
				return FALSE;
			fs->winsect = sector;
		}
	}
	return TRUE;
}




/*-----------------------------------------------------------------------*/
/* Clean-up cached data                                                  */
/*-----------------------------------------------------------------------*/

#if !_FS_READONLY
static
FRESULT sync (void)		/* FR_OK: successful, FR_RW_ERROR: failed */
{
	FATFS *fs = FatFs;


	fs->winflag = 1;
	if (!move_window(0)) return FR_RW_ERROR;
#if _USE_FSINFO
	/* Update FSInfo sector if needed */
	if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
		fs->winsect = 0;
		memset(fs->win, 0, 512);
		ST_WORD(&fs->win[BS_55AA], 0xAA55);
		ST_DWORD(&fs->win[FSI_LeadSig], 0x41615252);
		ST_DWORD(&fs->win[FSI_StrucSig], 0x61417272);
		ST_DWORD(&fs->win[FSI_Free_Count], fs->free_clust);
		ST_DWORD(&fs->win[FSI_Nxt_Free], fs->last_clust);
		disk_write(0, fs->win, fs->fsi_sector, 1);
		fs->fsi_flag = 0;
	}
#endif
	/* Make sure that no pending write process in the physical drive */
	if (disk_ioctl(0, CTRL_SYNC, NULL) != RES_OK) return FR_RW_ERROR;
	return FR_OK;
}
#endif




/*-----------------------------------------------------------------------*/
/* Get a cluster status                                                  */
/*-----------------------------------------------------------------------*/

static
CLUST get_cluster (		/* 0,>=2: successful, 1: failed */
	CLUST clust			/* Cluster# to get the link information */
)
{
	WORD wc, bc;
	DWORD fatsect;
	FATFS *fs = FatFs;


	if (clust >= 2 && clust < fs->max_clust) {		/* Valid cluster# */
		fatsect = fs->fatbase;
		switch (fs->fs_type) {
		case FS_FAT12 :
			bc = (WORD)clust * 3 / 2;
			if (!move_window(fatsect + bc / 512)) break;
			wc = fs->win[bc % 512]; bc++;
			if (!move_window(fatsect + bc / 512)) break;
			wc |= (WORD)fs->win[bc % 512] << 8;
			return (clust & 1) ? (wc >> 4) : (wc & 0xFFF);

		case FS_FAT16 :
			if (!move_window(fatsect + clust / 256)) break;
			return LD_WORD(&fs->win[((WORD)clust * 2) % 512]);
#if _FAT32
		case FS_FAT32 :
			if (!move_window(fatsect + clust / 128)) break;
			return LD_DWORD(&fs->win[((WORD)clust * 4) % 512]) & 0x0FFFFFFF;
#endif
		}
	}

	return 1;	/* There is no cluster information, or an error occured */
}




/*-----------------------------------------------------------------------*/
/* Change a cluster status                                               */
/*-----------------------------------------------------------------------*/

#if !_FS_READONLY
static
BOOL put_cluster (		/* TRUE: successful, FALSE: failed */
	CLUST clust,		/* Cluster# to change */
	CLUST val			/* New value to mark the cluster */
)
{
	WORD bc;
	BYTE *p;
	DWORD fatsect;
	FATFS *fs = FatFs;


	fatsect = fs->fatbase;
	switch (fs->fs_type) {
	case FS_FAT12 :
		bc = (WORD)clust * 3 / 2;
		if (!move_window(fatsect + bc / 512)) return FALSE;
		p = &fs->win[bc % 512];
		*p = (clust & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
		bc++;
		fs->winflag = 1;
		if (!move_window(fatsect + bc / 512)) return FALSE;
		p = &fs->win[bc % 512];
		*p = (clust & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
		break;

	case FS_FAT16 :
		if (!move_window(fatsect + clust / 256)) return FALSE;
		ST_WORD(&fs->win[((WORD)clust * 2) % 512], (WORD)val);
		break;
#if _FAT32
	case FS_FAT32 :
		if (!move_window(fatsect + clust / 128)) return FALSE;
		ST_DWORD(&fs->win[((WORD)clust * 4) % 512], val);
		break;
#endif
	default :
		return FALSE;
	}
	fs->winflag = 1;
	return TRUE;
}
#endif /* !_FS_READONLY */




/*-----------------------------------------------------------------------*/
/* Remove a cluster chain                                                */
/*-----------------------------------------------------------------------*/

#if !_FS_READONLY