spibus_gpio.h File Reference

GPIO SPI bus declarations. More...

#include <dev/spibus.h>

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Data Structures
struct	_GSPIREG
Typedefs
typedef struct _GSPIREG	GSPIREG
Functions
uint_fast32_t	GpioSpiBusSetRate (NUTSPINODE *node, uint_fast32_t rate)
	Set clock rate of a specified SPI device.
int	GpioSpiSetup (NUTSPINODE *node)
	Update SPI settings.
Variables
NUTSPIBUS	spiBus0Gpio
	AVR SPI bus driver implementation structure.

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Detailed Description

GPIO SPI bus declarations.

 * $Id: spibus_gpio.h 4470 2012-08-20 14:06:43Z haraldkipp $
 * 

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Typedef Documentation

typedef struct _GSPIREG GSPIREG

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Function Documentation

uint_fast32_t GpioSpiBusSetRate	(	NUTSPINODE *	node,
		uint_fast32_t	rate
	)

Set clock rate of a specified SPI device.

The new clock rate will be used for the next transfer. If the given rate is beyond the capabilities of the bus controller, it will automatically adjusted before the transfer starts.

Parameters:

node	Specifies the SPI bus node.
rate	New clock rate, given in bits per second. If the value is SPI_CURRENT_RATE, then the current rate is kept.

Returns:

Previous rate.

References _GSPIREG::gspi_dly_rate, _NUTSPINODE::node_mode, _NUTSPINODE::node_rate, _NUTSPINODE::node_stat, NULL, NUTASSERT, rc, SPI_CURRENT_RATE, and SPI_MODE_UPDATE.

Referenced by GpioSpiSetup().

int GpioSpiSetup

(

NUTSPINODE *

node

)

Update SPI settings.

References GpioSpiBusSetRate(), _NUTSPINODE::node_bits, _NUTSPINODE::node_mode, _NUTSPINODE::node_rate, and SPI_MODE_UPDATE.

Referenced by GpioSpiBus0NodeInit(), and GpioSpiBus0Select().

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Variable Documentation

NUTSPIBUS spiBus0Gpio

AVR SPI bus driver implementation structure.