XgSpiNodeAt45d

Data Structures
struct	_AT45D_DCB
Defines
#define	SPI_RATE_AT45D0   33000000
#define	SPI_MODE_AT45D0   SPI_MODE_3
#define	SPI_RATE_AT45D1   33000000
#define	SPI_MODE_AT45D1   SPI_MODE_3
#define	SPI_RATE_AT45D2   33000000
#define	SPI_MODE_AT45D2   SPI_MODE_3
#define	SPI_RATE_AT45D3   33000000
#define	SPI_MODE_AT45D3   SPI_MODE_3
Typedefs
typedef struct _AT45D_DCB	AT45D_DCB
Functions
int	At45dNodeLock (NUTSPINODE *node)
void	At45dNodeUnlock (NUTSPINODE *node)
int	At45dNodeTransfer (NUTSPINODE *node, uint8_t op, uint32_t parm, uint_fast8_t oplen, const void *txbuf, void *rxbuf, int xlen)
	Execute DataFlash command with data transfer.
int	At45dNodeCommand (NUTSPINODE *node, uint8_t op, uint32_t parm, uint_fast8_t oplen)
	Execute DataFlash command without data.
uint8_t	At45dNodeStatus (NUTSPINODE *node)
	Query the status of the serial flash.
int	At45dNodeWaitReady (NUTSPINODE *node, uint32_t tmo, int poll)
	Wait until DataFlash memory cycle finished.
AT45D_INFO *	At45dNodeProbe (NUTSPINODE *node)
	Determine the DataFlash type.
Variables
NUTSPINODE	nodeAt45d0
	First AT45D DataFlash SPI node implementation structure.
NUTSPINODE	nodeAt45d1
	Second AT45D DataFlash SPI node implementation structure.
NUTSPINODE	nodeAt45d2
	Third AT45D DataFlash SPI node implementation structure.
NUTSPINODE	nodeAt45d3
	Forth AT45D DataFlash SPI node implementation structure.

---

Define Documentation

#define SPI_RATE_AT45D0   33000000

#define SPI_MODE_AT45D0   SPI_MODE_3

#define SPI_RATE_AT45D1   33000000

#define SPI_MODE_AT45D1   SPI_MODE_3

#define SPI_RATE_AT45D2   33000000

#define SPI_MODE_AT45D2   SPI_MODE_3

#define SPI_RATE_AT45D3   33000000

#define SPI_MODE_AT45D3   SPI_MODE_3

---

Typedef Documentation

typedef struct _AT45D_DCB AT45D_DCB

---

Function Documentation

int At45dNodeLock

(

NUTSPINODE *

node

)

References _AT45D_DCB::dcb_lock, _NUTSPINODE::node_dcb, NUT_WAIT_INFINITE, and NutEventWait().

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void At45dNodeUnlock

(

NUTSPINODE *

node

)

References _AT45D_DCB::dcb_lock, _NUTSPINODE::node_dcb, and NutEventPost().

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int At45dNodeTransfer	(	NUTSPINODE *	node,
		uint8_t	op,
		uint32_t	parm,
		uint_fast8_t	oplen,
		const void *	txbuf,
		void *	rxbuf,
		int	xlen
	)

Execute DataFlash command with data transfer.

Parameters:

node	Specifies the SPI node.
op	Command code.
parm	Command parameter.
oplen	Command length.
txbuf	Pointer to the transmit data buffer, may be set to NULL.
rxbuf	Pointer to the receive data buffer, may be set to NULL.
xlen	Number of byte to receive and/or transmit.

Returns:

0 on success, -1 on errors.

References _NUTSPIBUS::bus_alloc, _NUTSPIBUS::bus_release, _NUTSPIBUS::bus_transfer, _NUTSPINODE::node_bus, NULL, NUTASSERT, and rc.

Referenced by At45dNodeCommand().

int At45dNodeCommand	(	NUTSPINODE *	node,
		uint8_t	op,
		uint32_t	parm,
		uint_fast8_t	oplen
	)

Execute DataFlash command without data.

Parameters:

node	Specifies the SPI node.
op	Command operation code.
parm	Optional command parameter.
oplen	Command length.

Returns:

0 on success, -1 on errors.

References At45dNodeTransfer(), and NULL.

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uint8_t At45dNodeStatus

(

NUTSPINODE *

node

)

Query the status of the serial flash.

Parameters:

node	Specifies the SPI node.

Returns:

0 on success or -1 in case of an error.

References _NUTSPIBUS::bus_alloc, _NUTSPIBUS::bus_release, _NUTSPIBUS::bus_transfer, _NUTSPIBUS::bus_wait, DFCMD_READ_STATUS, _NUTSPINODE::node_bus, NULL, NUT_WAIT_INFINITE, NUTASSERT, and rc.

Referenced by At45dNodeProbe(), and At45dNodeWaitReady().

int At45dNodeWaitReady	(	NUTSPINODE *	node,
		uint32_t	tmo,
		int	poll
	)

Wait until DataFlash memory cycle finished.

Parameters:

node	Specifies the SPI node.
tmo	Number of loops (or milliseconds) to wait at max.
poll	If 0, the current thread will be suspended for 1 millisecond between each retry. Otherwise the polling loop will not sleep, but may be still suspended by the lower level SPI bus driver.

Returns:

0 on success or -1 in case of an error.

References At45dNodeStatus(), and NutSleep().

Referenced by At45dNodeProbe().

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AT45D_INFO* At45dNodeProbe

(

NUTSPINODE *

node

)

Determine the DataFlash type.

If the board contains a known DataFlash chip, but couldn't be determined by this routine, then most probably the chip select configuration is wrong.

Parameters:

node	Specifies the SPI node.

Returns:

Pointer to a AT45D_INFO structure, which contains the relevant DataFlash parameters. If no known DataFlash is available, then NULL is returned.

References at45d_info, at45d_known_types, AT45D_STATUS_DENSITY, AT45D_STATUS_PAGE_SIZE, At45dNodeStatus(), At45dNodeWaitReady(), and NULL.

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Variable Documentation

NUTSPINODE nodeAt45d0

Initial value:

 {
    NULL,                       
    NULL,                       
    SPI_RATE_AT45D0,            
    SPI_MODE_AT45D0,            
    8,                          
    0,                          
    &dcbAt45d0                  
}

First AT45D DataFlash SPI node implementation structure.

NUTSPINODE nodeAt45d1

Initial value:

 {
    NULL,                       
    NULL,                       
    SPI_RATE_AT45D1,            
    SPI_MODE_AT45D1,            
    8,                          
    0,                          
    &dcbAt45d1                  
}

Second AT45D DataFlash SPI node implementation structure.

NUTSPINODE nodeAt45d2

Initial value:

 {
    NULL,                       
    NULL,                       
    SPI_RATE_AT45D2,            
    SPI_MODE_AT45D2,            
    8,                          
    0,                          
    &dcbAt45d2                  
}

Third AT45D DataFlash SPI node implementation structure.

NUTSPINODE nodeAt45d3

Initial value:

 {
    NULL,                       
    NULL,                       
    SPI_RATE_AT45D3,            
    SPI_MODE_AT45D3,            
    8,                          
    0,                          
    &dcbAt45d3                  
}

Forth AT45D DataFlash SPI node implementation structure.