SPI

Serial peripheral interface functions. More...

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

Detailed Description

Serial peripheral interface functions.

Function Documentation

unsigned char debugSpi	(	littleWire *	lwHandle,
		unsigned char	message
	)

Send one byte SPI message over MOSI pin. Slightly slower than the actual one.
There isn't any chip select control involved. Useful for debug console app

Parameters

lwHandle	littleWire device pointer
message	Message to send

Returns

Received SPI message

Definition at line 270 of file littleWire.c.

void spi_init

(

littleWire *

lwHandle)

Initialize the SPI module on the Little-Wire

Parameters

lwHandle

littleWire device pointer

Returns

(none)

Definition at line 254 of file littleWire.c.

void spi_sendMessage	(	littleWire *	lwHandle,
		unsigned char *	sendBuffer,
		unsigned char *	inputBuffer,
		unsigned char	length,
		unsigned char	mode
	)

Send SPI message(s). SPI Mode is 0.

Parameters

lwHandle	littleWire device pointer
sendBuffer	Message array to send
inputBuffer	Returned answer message
length	Message length - maximum 4
mode	AUTO_CS or MANUAL_CS

Returns

(none)

Definition at line 259 of file littleWire.c.

void spi_updateDelay	(	littleWire *	lwHandle,
		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

lwHandle	littleWire device pointer
duration	Amount of delay.

Returns

(none)

Definition at line 277 of file littleWire.c.