Disk IO

Low level disk I/O module skeleton for FatFs. More...

Collaboration diagram for Disk IO:

Files
file	diskio.c
	Low level disk I/O module skeleton for FatFs.
file	diskio.c
	Low level disk I/O module skeleton for FatFs.

Macros
#define	_USE_WRITE   1
#define	_USE_IOCTL   1
#define	STA_NOINIT   0x01
#define	STA_NODISK   0x02
#define	STA_PROTECT   0x04
#define	CTRL_SYNC   0
#define	GET_SECTOR_COUNT   1
#define	GET_SECTOR_SIZE   2
#define	GET_BLOCK_SIZE   3
#define	CTRL_ERASE_SECTOR   4
#define	CTRL_POWER   5
#define	CTRL_LOCK   6
#define	CTRL_EJECT   7
#define	CTRL_FORMAT   8
#define	MMC_GET_TYPE   10
#define	MMC_GET_CSD   11
#define	MMC_GET_CID   12
#define	MMC_GET_OCR   13
#define	MMC_GET_SDSTAT   14
#define	ATA_GET_REV   20
#define	ATA_GET_MODEL   21
#define	ATA_GET_SN   22
#define	CT_MMC   0x01
#define	CT_SD1   0x02
#define	CT_SD2   0x04
#define	CT_SDC   (CT_SD1|CT_SD2)
#define	CT_BLOCK   0x08
#define	BLOCK_SIZE   512

Typedefs
typedef BYTE	DSTATUS
	Status of Disk Functions.

Enumerations
enum	DRESULT {   RES_OK = 0, RES_ERROR, RES_WRPRT, RES_NOTRDY,   RES_PARERR }
	Results of Disk Functions. More...

Functions
DSTATUS	disk_initialize (BYTE drv)
	Initialize the SD Card Returns the disk status. More...
DSTATUS	disk_status (BYTE drv)
	Return disk status. More...
DRESULT	disk_read (BYTE drv, BYTE *buff, DWORD sector, UINT count)
	Read from the SD Card. More...
DRESULT	disk_write (BYTE drv, const BYTE *buff, DWORD sector, BYTE count)
DRESULT	disk_ioctl (BYTE drv, BYTE cmd, void *buff)

Detailed Description

Low level disk I/O module skeleton for FatFs.

Macro Definition Documentation

#define _USE_IOCTL   1

1: Enable disk_ioctl function

Definition at line 53 of file diskio.h.

#define _USE_WRITE   1

1: Enable disk_write function

Definition at line 52 of file diskio.h.

#define ATA_GET_MODEL   21

Get model name

Definition at line 90 of file diskio.h.

#define ATA_GET_REV   20

Get F/W revision

Definition at line 89 of file diskio.h.

#define ATA_GET_SN   22

Get serial number

Definition at line 91 of file diskio.h.

#define BLOCK_SIZE   512

Block Size in Bytes

Definition at line 53 of file diskio.c.

#define CT_BLOCK   0x08

Block addressing

Definition at line 99 of file diskio.h.

#define CT_MMC   0x01

MMC ver 3

Definition at line 95 of file diskio.h.

#define CT_SD1   0x02

SD ver 1

Definition at line 96 of file diskio.h.

#define CT_SD2   0x04

SD ver 2

Definition at line 97 of file diskio.h.

#define CT_SDC   (CT_SD1|CT_SD2)

SD

Definition at line 98 of file diskio.h.

#define CTRL_EJECT   7

Eject media

Definition at line 78 of file diskio.h.

#define CTRL_ERASE_SECTOR   4

Force erased a block of sectors (for only _USE_ERASE)

Definition at line 71 of file diskio.h.

#define CTRL_FORMAT   8

Create physical format on the media

Definition at line 79 of file diskio.h.

#define CTRL_LOCK   6

Lock/Unlock media removal

Definition at line 77 of file diskio.h.

#define CTRL_POWER   5

Get/Set power status

Definition at line 76 of file diskio.h.

#define CTRL_SYNC   0

Flush disk cache (for write functions)

Definition at line 63 of file diskio.h.

#define GET_BLOCK_SIZE   3

Get erase block size (for only f_mkfs())

Definition at line 68 of file diskio.h.

#define GET_SECTOR_COUNT   1

Get media size (for only f_mkfs())

Definition at line 64 of file diskio.h.

#define GET_SECTOR_SIZE   2

Get sector size (for multiple sector size (_MAX_SS >= 1024))

Definition at line 65 of file diskio.h.

#define MMC_GET_CID   12

Get CID

Definition at line 84 of file diskio.h.

#define MMC_GET_CSD   11

Get CSD

Definition at line 83 of file diskio.h.

#define MMC_GET_OCR   13

Get OCR

Definition at line 85 of file diskio.h.

#define MMC_GET_SDSTAT   14

Get SD status

Definition at line 86 of file diskio.h.

#define MMC_GET_TYPE   10

Get card type

Definition at line 82 of file diskio.h.

#define STA_NODISK   0x02

No medium in the drive

Definition at line 57 of file diskio.h.

#define STA_NOINIT   0x01

Drive not initialized

Definition at line 56 of file diskio.h.

#define STA_PROTECT   0x04

Write protected

Definition at line 58 of file diskio.h.

Enumeration Type Documentation

enum DRESULT

Results of Disk Functions.

Enumerator
RES_OK	0: Successful
RES_ERROR	1: R/W Error
RES_WRPRT	2: Write Protected
RES_NOTRDY	3: Not Ready
RES_PARERR	4: Invalid Parameter

Definition at line 112 of file diskio.h.

Function Documentation

DSTATUS disk_initialize

(

BYTE

drv

)

Initialize the SD Card
Returns the disk status.

Parameters

[in]

drv

Physical drive number (0..)

Returns

DSTATUS

Definition at line 71 of file diskio.c.

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DRESULT disk_read	(	BYTE	drv,
		BYTE *	buff,
		DWORD	sector,
		UINT	count
	)

Read from the SD Card.

Parameters

[in]	drv	Physical drive number (0..)
[out]	buff	Data buffer to store read data
[in]	sector	Sector address (LBA)
[in]	count	Number of sectors to read (1..128)

Returns

DRESULT

Definition at line 127 of file diskio.c.

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DSTATUS disk_status

(

BYTE

drv

)

Return disk status.

Parameters

[in]

drv

Physical drive number (0..)

Returns

DSTATUS

Definition at line 103 of file diskio.c.

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