Spi Class Reference

Classes
struct	Settings

Public Types
enum	Mode { MODE0 = SPI_MODE_0 , MODE1 = SPI_MODE_1 , MODE2 = SPI_MODE_2 , MODE3 = SPI_MODE_3 }

Public Member Functions
int	setup (const Settings &settings)
int	transfer (unsigned char *send, unsigned char *receive, size_t numBytes)
int	setMode (unsigned char mode)
int	setNumBits (unsigned char numBits)
int	setSpeed (unsigned long speed)
void	cleanup ()

Detailed Description

Examples

Communication/Spi/render.cpp.

Member Function Documentation

setup()

int Spi::setup

(

const Settings &

settings

)

Initialize the device

Returns

0 on success, an error code otherwise.

Examples

Communication/Spi/render.cpp.

transfer()

int Spi::transfer	(	unsigned char *	send,
		unsigned char *	receive,
		size_t	numBytes )

Perform one SPI transaction.

@send: Points to the buffer containing the data to be sent @receive: Points to the buffer into which the received bytes will be stored @numBytes: length of buffers in bytes.

Returns

0 on success, -1 on failure

setMode()

int Spi::setMode

(

unsigned char

mode

)

Set the device mode.

Parameters

mode	a set of flags that will be passed to ioctl(... SPI_IOC_xx_MODE ...)

Returns

0 upon success or an error code otherwise.

setNumBits()

int Spi::setNumBits

(

unsigned char

numBits

)

Set the number of bits per word.

Parameters

numBits

the number of bits. Valid values are 8, 16, 24, 32

Returns

0 upon success or an error code otherwise.

setSpeed()

int Spi::setSpeed

(

unsigned long

speed

)

Set the clock frequency of the SPI bus.

Parameters

speed

the clock frequency.

Returns

0 upon success or an error code otherwise.

cleanup()

void Spi::cleanup

(

)

Close the device.

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The documentation for this class was generated from the following files:

• libraries/Spi/Spi.h
• libraries/Spi/Spi.cpp