LT_SPI.cpp File Reference

Library for LT_SPI: Routines to communicate with ATmega328P's hardware SPI port. More...

Detailed Description

Library for LT_SPI: Routines to communicate with ATmega328P's hardware SPI port.

Definition in file LT_SPI.cpp.

Go to the source code of this file.

Functions
void	spi_transfer_byte (uint8_t cs_pin, uint8_t tx, uint8_t *rx)
	Reads and sends a byte. More...
void	spi_transfer_word (uint8_t cs_pin, uint16_t tx, uint16_t *rx)
	Reads and sends a word. More...
void	spi_transfer_block (uint8_t cs_pin, uint8_t *tx, uint8_t *rx, uint8_t length)
	Reads and sends a byte array. More...
void	quikeval_SPI_connect ()
	Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C. More...
void	quikeval_SPI_init (void)
	Configure the SPI port for 4Mhz SCK. More...
void	spi_enable (uint8_t spi_clock_divider)
	Setup the processor for hardware SPI communication. More...
void	spi_disable ()
	Disable the SPI hardware port. More...
void	spi_write (int8_t data)
	Write a data byte using the SPI hardware. More...
int8_t	spi_read (int8_t data)
	The data byte to be written. More...

Function Documentation

quikeval_SPI_connect()

void quikeval_SPI_connect

(

)

Connect SPI pins to QuikEval connector through the Linduino MUX. This will disconnect I2C.

Definition at line 138 of file LT_SPI.cpp.

quikeval_SPI_init()

void quikeval_SPI_init

(

)

Configure the SPI port for 4Mhz SCK.

This function or spi_enable() must be called before using the other SPI routines.

Definition at line 151 of file LT_SPI.cpp.

spi_disable()

void spi_disable

(

)

Disable the SPI hardware port.

Definition at line 170 of file LT_SPI.cpp.

spi_enable()

void spi_enable

(

uint8_t

spi_clock_divider

)

Setup the processor for hardware SPI communication.

Must be called before using the other SPI routines. Alternatively, call quikeval_SPI_connect(), which automatically calls this function.

Parameters

spi_clock_divider

Configures SCK frequency. Use constant defined in header file.

Definition at line 160 of file LT_SPI.cpp.

spi_read()

int8_t spi_read

(

int8_t

data

)

The data byte to be written.

Read and write a data byte using the SPI hardware.

Parameters

data	The data byte to be written

Definition at line 189 of file LT_SPI.cpp.

spi_transfer_block()

void spi_transfer_block	(	uint8_t	cs_pin,
		uint8_t *	tx,
		uint8_t *	rx,
		uint8_t	length
	)

Reads and sends a byte array.

Returns

void

Parameters

cs_pin	Chip select pin
tx	Byte array to be transmitted
rx	Byte array to be received
length	Length of array

Definition at line 125 of file LT_SPI.cpp.

spi_transfer_byte()

void spi_transfer_byte	(	uint8_t	cs_pin,
		uint8_t	tx,
		uint8_t *	rx
	)

Reads and sends a byte.

Returns

void

Parameters

cs_pin	Chip select pin
tx	Byte to be transmitted
rx	Byte to be received

Definition at line 87 of file LT_SPI.cpp.

spi_transfer_word()

void spi_transfer_word	(	uint8_t	cs_pin,
		uint16_t	tx,
		uint16_t *	rx
	)

Reads and sends a word.

Returns

void

Parameters

cs_pin	Chip select pin
tx	Byte to be transmitted
rx	Byte to be received

Definition at line 98 of file LT_SPI.cpp.

spi_write()

void spi_write

(

int8_t

data

)

Write a data byte using the SPI hardware.

Parameters

data	Byte to be written to SPI port

Definition at line 176 of file LT_SPI.cpp.