at25df.c File Reference

#include <cfg/os.h>
#include <cfg/memory.h>
#include <sys/timer.h>
#include <string.h>
#include <stdlib.h>
#include <dev/at25df.h>
#include <dev/blockdev.h>
#include <dev/spibus.h>
#include <sys/nutdebug.h>

Include dependency graph for at25df.c:

Defines
#define	MAX_AT25_CMDLEN   6
#define	AT25_ERASE_WAIT   3000
#define	AT25_CHIP_ERASE_WAIT   50000
#define	AT25_WRITE_POLLS   1000
#define	MOUNT_OFFSET_AT45D0   0
#define	MOUNT_TOP_RESERVE_AT45D0   0
Functions
int	At25dfInit (NUTDEVICE *dev)
	Initialize dataflash at specified interface and chip select.
int	SpiAt25PageRead (NUTDEVICE *dev, uint32_t pgn, void *data, int len)
int	SpiAt25PageWrite (NUTDEVICE *dev, uint32_t pgn, const void *data, int len)
int	SpiAt25PageWrite_P (NUTDEVICE *dev, uint32_t pgn, PGM_P data, int len)
int	SpiAt25IOCtl (NUTDEVICE *dev, int req, void *conf)
Variables
AT25D_INFO	at25d_info []
	Parameter table of known DataFlash types.
uint_fast8_t	at25d_known_types = sizeof(at25d_info) / sizeof(AT25D_INFO)
	Number of known Dataflash types.
NUTSPINODE	at25df
NUTDEVICE	devDataFlash0
AT25 DataFlash Commands
#define	DFCMD_READ_PAGE   0x0B
	Continuos read (high frequency).
#define	DFCMD_BLOCK_ERASE_4K   0x20
	Block erase 4k.
#define	DFCMD_BLOCK_ERASE_32K   0x52
	Block erase 32k.
#define	DFCMD_BLOCK_ERASE_64K   0xd8
	Block erase 64k.
#define	DFCMD_CHIP_ERASE   0xC7
	Chip erase.
#define	DFCMD_WRITE   0x02
	Write bytes/page.
#define	DFCMD_READ_STATUS   0x05
	Read status register.
#define	DFCMD_READ_DEVICEID   0x9F
#define	DFCMD_WRITE_ENABLE   0x06
#define	DFCMD_WRITE_DISABLE   0x04

---

Define Documentation

#define MAX_AT25_CMDLEN   6

#define AT25_ERASE_WAIT   3000

#define AT25_CHIP_ERASE_WAIT   50000

#define AT25_WRITE_POLLS   1000

Referenced by SpiAt25PageWrite().

#define DFCMD_READ_PAGE   0x0B

Continuos read (high frequency).

Reads a continous stream in high speed mode.

Referenced by SpiAt25PageRead().

#define DFCMD_BLOCK_ERASE_4K   0x20

Block erase 4k.

Referenced by SpiAt25PageWrite().

#define DFCMD_BLOCK_ERASE_32K   0x52

Block erase 32k.

#define DFCMD_BLOCK_ERASE_64K   0xd8

Block erase 64k.

#define DFCMD_CHIP_ERASE   0xC7

Chip erase.

#define DFCMD_WRITE   0x02

Write bytes/page.

Referenced by SpiAt25PageWrite().

#define DFCMD_READ_STATUS   0x05

Read status register.

#define DFCMD_READ_DEVICEID   0x9F

#define DFCMD_WRITE_ENABLE   0x06

Referenced by SpiAt25PageWrite().

#define DFCMD_WRITE_DISABLE   0x04

#define MOUNT_OFFSET_AT45D0   0

#define MOUNT_TOP_RESERVE_AT45D0   0

---

Function Documentation

int At25dfInit

(

NUTDEVICE *

dev

)

Initialize dataflash at specified interface and chip select.

Parameters:

spibas	Interface base address. For ARM MCUs this may be the I/O base address of the hardware SPI.
spipcs	Device chip select.

Returns:

Device descriptor or -1 in case of an error.

References at25d_known_types, _AT25D_INFO::at25d_pages, _AT25D_INFO::at25d_psize, _NUTBLOCKIO::blkio_blk_cnt, _NUTBLOCKIO::blkio_blk_siz, _NUTBLOCKIO::blkio_info, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, NULL, and NUTASSERT.

int SpiAt25PageRead	(	NUTDEVICE *	dev,
		uint32_t	pgn,
		void *	data,
		int	len
	)

References _AT25D_INFO::at25d_pages, _AT25D_INFO::at25d_pshft, _NUTBLOCKIO::blkio_info, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, DFCMD_READ_PAGE, NULL, and NUTASSERT.

int SpiAt25PageWrite	(	NUTDEVICE *	dev,
		uint32_t	pgn,
		const void *	data,
		int	len
	)

References AT25_WRITE_POLLS, _NUTBLOCKIO::blkio_info, _NUTDEVICE::dev_dcb, _NUTDEVICE::dev_icb, DFCMD_BLOCK_ERASE_4K, DFCMD_WRITE, DFCMD_WRITE_ENABLE, NULL, NUTASSERT, and rc.

int SpiAt25PageWrite_P	(	NUTDEVICE *	dev,
		uint32_t	pgn,
		PGM_P	data,
		int	len
	)

int SpiAt25IOCtl	(	NUTDEVICE *	dev,
		int	req,
		void *	conf
	)

References NULL, NUTASSERT, NUTBLKDEV_MEDIAAVAIL, NUTBLKDEV_MEDIACHANGE, and rc.

---

Variable Documentation

AT25D_INFO at25d_info[]

Initial value:

 {
    {12, 2048, 4096, 0x48}, 
}

Parameter table of known DataFlash types.

uint_fast8_t at25d_known_types = sizeof(at25d_info) / sizeof(AT25D_INFO)

Number of known Dataflash types.

Referenced by At25dfInit().

NUTSPINODE at25df

Initial value:

 {
    NULL,   
    NULL,   
    1000000,
    0,  
    8,  
    0   
}

NUTDEVICE devDataFlash0

Initial value:

 {
    0,                  
    {'a', 't', '2', '5', 'd', 'f', '0', 0, 0},    
    IFTYP_BLKIO,         
    0,                  
    0,                  
    &at25df,            
    &blkIoAt25df,       
    At25dfInit,       
    NutBlockDeviceIOCtl,       
    NutBlockDeviceRead,        
    NutBlockDeviceWrite,       

    NutBlockDeviceWrite_P,     

    NutBlockDeviceOpen,        
    NutBlockDeviceClose,       
    NutBlockDeviceSize                
}