spibus_at91.h File Reference

AT91 specific SPI bus declarations. More...

#include <dev/spibus.h>

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Data Structures
struct	_AT91SPIREG
Typedefs
typedef struct _AT91SPIREG	AT91SPIREG
Functions
int	At91Spi0ChipSelect (uint_fast8_t cs, uint_fast8_t hi)
	Set the specified chip select to a given level.
void	At91SpiBus0Interrupt (void *arg)
int	At91Spi1ChipSelect (uint_fast8_t cs, uint_fast8_t hi)
void	At91SpiBus1Interrupt (void *arg)
int	At91SpiSetup (NUTSPINODE *node)
	Update SPI shadow registers.
int	At91SpiBusNodeInit (NUTSPINODE *node)
	Initialize an SPI bus node.
int	At91SpiBusTransfer (NUTSPINODE *node, CONST void *txbuf, void *rxbuf, int xlen)
int	At91SpiBusDblBufTransfer (NUTSPINODE *node, CONST void *txbuf, void *rxbuf, int xlen)
int	At91SpiBusPollTransfer (NUTSPINODE *node, CONST void *txbuf, void *rxbuf, int xlen)
int	At91SpiBusWait (NUTSPINODE *node, uint32_t tmo)
Variables
NUTSPIBUS	spiBus0At91
	AT91 SPI bus driver implementation structure.
NUTSPIBUS	spiBus1At91

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Detailed Description

AT91 specific SPI bus declarations.

 * $Id: spibus_at91.h 2614 2009-04-15 13:53:30Z haraldkipp $
 * 

Definition in file spibus_at91.h.

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Typedef Documentation

typedef struct _AT91SPIREG AT91SPIREG

Definition at line 48 of file spibus_at91.h.

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Function Documentation

int At91Spi0ChipSelect	(	uint_fast8_t	cs,
		uint_fast8_t	hi
	)

Set the specified chip select to a given level.

Definition at line 169 of file spibus0at91.c.

References EIO, and errno.

Referenced by At91SpiBus0Deselect(), At91SpiBus0Select(), and At91SpiBusNodeInit().

void At91SpiBus0Interrupt

(

void *

arg

)

Definition at line 314 of file spibus0at91.c.

References inb, NutEventPostFromIrq, and outb.

Referenced by At91SpiBusNodeInit().

int At91Spi1ChipSelect	(	uint_fast8_t	cs,
		uint_fast8_t	hi
	)

Referenced by At91SpiBusNodeInit().

void At91SpiBus1Interrupt

(

void *

arg

)

Referenced by At91SpiBusNodeInit().

int At91SpiSetup

(

NUTSPINODE *

node

)

Update SPI shadow registers.

Parameters:

node	Specifies the SPI bus node.

Returns:

Always 0.

Definition at line 74 of file spibus_at91.c.

References _AT91SPIREG::at91spi_csr, _AT91SPIREG::at91spi_mr, _NUTSPIBUS::bus_base, _NUTSPINODE::node_bits, _NUTSPINODE::node_bus, _NUTSPINODE::node_mode, _NUTSPINODE::node_rate, _NUTSPINODE::node_stat, NUT_HWCLK_PERIPHERAL, NUTASSERT, NutClockGet, SPI_BITS, SPI_BITS_LSB, SPI_CPOL, SPI_CSAAT, SPI_LLB, SPI_MODE_CPHA, SPI_MODE_CPOL, SPI_MODE_CSKEEP, SPI_MODE_FAULT, SPI_MODE_LOOPBACK, SPI_MODE_UPDATE, SPI_MODFDIS, SPI_NCPHA, SPI_SCBR, and SPI_SCBR_LSB.

Referenced by At91SpiBus0Select(), and At91SpiBusNodeInit().

int At91SpiBusNodeInit

(

NUTSPINODE *

node

)

Initialize an SPI bus node.

This routine is called for each SPI node, which is registered via NutRegisterSpiDevice().

Parameters:

node	Specifies the SPI bus node.

Returns:

0 on success or -1 if there is no valid chip select.

Definition at line 139 of file spibus_at91.c.

References At91Spi0ChipSelect(), At91Spi1ChipSelect(), _AT91SPIREG::at91spi_csr, _AT91SPIREG::at91spi_mr, At91SpiBus0Interrupt(), At91SpiBus1Interrupt(), At91SpiSetup(), _NUTSPIBUS::bus_base, _NUTSPIBUS::bus_ready, _NUTSPIBUS::bus_sig, malloc(), _NUTSPINODE::node_bus, _NUTSPINODE::node_cs, _NUTSPINODE::node_mode, _NUTSPINODE::node_stat, NUTASSERT, NutIrqEnable(), NutRegisterIrqHandler(), outr, SPI1_BASE, SPI_IDR_OFF, SPI_MODE_CSHIGH, SPI_MODFDIS, SPI_MSTR, SPI_PCS_0, SPI_PCS_1, SPI_PCS_2, and SPI_PCS_3.

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int At91SpiBusTransfer	(	NUTSPINODE *	node,
		CONST void *	txbuf,
		void *	rxbuf,
		int	xlen
	)

int At91SpiBusDblBufTransfer	(	NUTSPINODE *	node,
		CONST void *	txbuf,
		void *	rxbuf,
		int	xlen
	)

int At91SpiBusPollTransfer	(	NUTSPINODE *	node,
		CONST void *	txbuf,
		void *	rxbuf,
		int	xlen
	)

int At91SpiBusWait	(	NUTSPINODE *	node,
		uint32_t	tmo
	)

Referenced by At91SpiBus0Deselect().

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Variable Documentation

NUTSPIBUS spiBus0At91

AT91 SPI bus driver implementation structure.

Definition at line 382 of file spibus0at91.c.

NUTSPIBUS spiBus1At91