---

i2c.h File Reference

I2C interface using AVR Two-Wire Interface (TWI) hardware. More...

#include <avr/twi.h>
#include "global.h"
#include "i2cconf.h"

Go to the source code of this file.

Defines
#define	TWCR_CMD_MASK   0x0F
#define	TWSR_STATUS_MASK   0xF8
#define	I2C_OK   0x00
#define	I2C_ERROR_NODEV   0x01
Enumerations
enum	eI2cStateType {   I2C_IDLE = 0, I2C_BUSY = 1, I2C_MASTER_TX = 2, I2C_MASTER_RX = 3,   I2C_SLAVE_TX = 4, I2C_SLAVE_RX = 5 }
Functions
void	i2cInit (void)
	Initialize I2C (TWI) interface.
void	i2cSetBitrate (u16 bitrateKHz)
	Set the I2C transaction bitrate (in KHz).
void	i2cSetLocalDeviceAddr (u08 deviceAddr, u08 genCallEn)
	Set the local (AVR processor's) I2C device address.
void	i2cSetSlaveReceiveHandler (void(*i2cSlaveRx_func)(u08 receiveDataLength, u08 *recieveData))
	Set the user function which handles receiving (incoming) data as a slave.
void	i2cSetSlaveTransmitHandler (u08(*i2cSlaveTx_func)(u08 transmitDataLengthMax, u08 *transmitData))
	Set the user function which handles transmitting (outgoing) data as a slave.
void	i2cSendStart (void)
	Send an I2C start condition in Master mode.
void	i2cSendStop (void)
	Send an I2C stop condition in Master mode.
void	i2cWaitForComplete (void)
	Wait for current I2C operation to complete.
void	i2cSendByte (u08 data)
	Send an (address|R/W) combination or a data byte over I2C.
void	i2cReceiveByte (u08 ackFlag)
	Receive a data byte over I2C.
u08	i2cGetReceivedByte (void)
	Pick up the data that was received with i2cReceiveByte().
u08	i2cGetStatus (void)
	Get current I2c bus status from TWSR.
void	i2cMasterSend (u08 deviceAddr, u08 length, u08 *data)
	send I2C data to a device on the bus
void	i2cMasterReceive (u08 deviceAddr, u08 length, u08 *data)
	receive I2C data from a device on the bus
u08	i2cMasterSendNI (u08 deviceAddr, u08 length, u08 *data)
	send I2C data to a device on the bus (non-interrupt based)
u08	i2cMasterReceiveNI (u08 deviceAddr, u08 length, u08 *data)
	receive I2C data from a device on the bus (non-interrupt based)
eI2cStateType	i2cGetState (void)
	Get the current high-level state of the I2C interface.

---

Detailed Description

I2C interface using AVR Two-Wire Interface (TWI) hardware.

Definition in file i2c.h.

---