SPI

Functions
void	littleWire::spi_init ()
unsigned char	littleWire::spi_sendMessage (unsigned char message)
void	littleWire::spi_sendMessageMulti (unsigned char *sendBuffer, unsigned char *inputBuffer, unsigned char length, unsigned char mode)
void	littleWire::spi_updateDelay (unsigned int duration)

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Detailed Description

SPI functions

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Function Documentation

void littleWire::spi_init

(

)

Initialize the SPI module on the Little-Wire

Returns:

(none)

unsigned char littleWire::spi_sendMessage

(

unsigned char

message

)

Send and receive a single byte SPI message. Chip select is always manual

Parameters:

message

Message to send

Returns:

Response byte

void littleWire::spi_sendMessageMulti	(	unsigned char *	sendBuffer,
		unsigned char *	inputBuffer,
		unsigned char	length,
		unsigned char	mode
	)

Send and receive multiple (up to 4 bytes) SPI messages. Chip select is automatic or manual.
If automatic chip select is selected, RESET_PIN stays HIGH in idle time , and goes to LOW while sending the messages over SPI

Parameters:

sendBuffer	Pointer of the array which has your messages to send.
inputBuffer	Pointer of the array which you want to store SPI response messages.
length	Length of the messages. ( Maximum is 4)
mode	Chip select mode. (AUTO_CS or MANUAL_CS )

Returns:

(none)

void littleWire::spi_updateDelay

(

unsigned int

duration

)

Change the SPI message frequency by adjusting delay duration. By default, Little-Wire sends the SPI messages with maximum speed.
If your hardware can't catch up with the speed, increase the duration value to lower the SPI speed.

Parameters:

duration

Amount of delay.

Returns:

(none)