Wire.h File Reference

TWI/I2C (Wire) library, master and slave, for Arduino and Wiring. More...

#include <functional>
#include "Arduino.h"
#include "api/HardwareI2C.h"
#include "utility/twi.h"

Classes
class	TwoWire
	TWI/I2C (Wire) controller, usable as master or slave. More...

Macros
#define	BUFFER_LENGTH   32
	Minimal Rx/Tx buffer length in bytes.
#define	WIRE_MAX_TX_BUFF_LENGTH   1024U
	Maximum Tx buffer length in bytes.
#define	WIRE_HAS_END   1
	Defined when Wire provides end().

Variables
TwoWire	Wire

Detailed Description

TWI/I2C (Wire) library, master and slave, for Arduino and Wiring.

Macro Definition Documentation

BUFFER_LENGTH

#define BUFFER_LENGTH   32

Minimal Rx/Tx buffer length in bytes.

Note

Buffers length is increased when needed, but the Tx buffer is limited to WIRE_MAX_TX_BUFF_LENGTH to avoid too much stack consumption. Buffer length and maximum buffer length are limited by the uint16_t type.

WIRE_MAX_TX_BUFF_LENGTH

#define WIRE_MAX_TX_BUFF_LENGTH   1024U

Maximum Tx buffer length in bytes.

Can be overridden before including Wire.h.

Note

Limited by the uint16_t type.