i2c.h File Reference

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Macros
#define	START   1
#define	STOP   2
#define	SLA   3
#define	DATA   4
#define	ACK   5
#define	NACK   6
#define	WRITE   0
#define	READ   1

Functions
uint8_t	i2c_send (const uint8_t code, const uint8_t data)
void	i2c_init (void)
void	i2c_shut (void)
uint8_t	i2c_master_send_b (const uint8_t addr, const uint8_t data)
uint8_t	i2c_master_send_w (const uint8_t addr, const uint8_t msb, const uint8_t lsb)
	i2c master send a word. Send a word to the i2c slave with stop at the end. More...
uint8_t	i2c_master_read_b (const uint8_t addr, uint8_t *byte)
	i2c master read byte. More...
uint8_t	i2c_master_read_w (const uint8_t addr, uint16_t *code)

Macro Definition Documentation

ACK

#define ACK   5

define the i2c ACK value

DATA

#define DATA   4

define the i2c DATA value

NACK

#define NACK   6

define the i2c NACK value

READ

#define READ   1

define READ value

SLA

#define SLA   3

define the i2c SLA value

START

#define START   1

define the i2c START value

STOP

#define STOP   2

define the i2c STOP value

WRITE

#define WRITE   0

define WRITE value

Function Documentation

i2c_init()

void i2c_init

(

void

)

Initialize the i2c bus

i2c_master_read_b()

uint8_t i2c_master_read_b	(	const uint8_t	addr,
		uint8_t *	byte
	)

i2c master read byte.

Read a byte from the slave with a stop at the end.

Parameters

addr	address of the slave.
byte	ptr to a pre-allocated byte.

Returns

1 - value OK, 0 - Error.

i2c_master_read_w()

uint8_t i2c_master_read_w	(	const uint8_t	addr,
		uint16_t *	code
	)

Read a word (2 byte) from the slave.

Parameters

addr	address of the slave.
code	ptr to a pre-allocated word.

Returns

1 - value OK, 0 - Error.

i2c_master_send_b()

uint8_t i2c_master_send_b	(	const uint8_t	addr,
		const uint8_t	data
	)

Send a byte to the i2c slave.

Parameters

addr	address of the slave.
data	byte to send.

i2c_master_send_w()

uint8_t i2c_master_send_w	(	const uint8_t	addr,
		const uint8_t	msb,
		const uint8_t	lsb
	)

i2c master send a word. Send a word to the i2c slave with stop at the end.

Parameters

addr	address of the slave.
msb	byte to send first.
lsb	byte to send last.

Returns

0 - OK, 1 - Error

i2c_send()

uint8_t i2c_send	(	const uint8_t	code,
		const uint8_t	data
	)

Send the i2c status to the bus.

Parameters

code	the i2c code to send.
data	the byte to send.

i2c_shut()

void i2c_shut

(

void

)

Shutdown the i2c bus