com.pi4j.io.i2c

Interface I2CDevice

All Known Implementing Classes:

I2CDeviceImpl

public interface I2CDevice

This is abstraction of an i2c device. It allows data to be read or written to the device.

Author:

Daniel Sendula

Method Summary

Methods

Modifier and Type	Method and Description
int	read() This method reads one byte from the i2c device.
int	read(byte[] buffer, int offset, int size) This method reads bytes directly from the i2c device to given buffer at asked offset.
int	read(int address) This method reads one byte from the i2c device.
int	read(int address, byte[] buffer, int offset, int size) This method reads bytes from the i2c device to given buffer at asked offset.
void	write(byte b) This method writes one byte directly to i2c device.
void	write(byte[] buffer, int offset, int size) This method writes several bytes directly to the i2c device from given buffer at given offset.
void	write(int address, byte b) This method writes one byte to i2c device.
void	write(int address, byte[] buffer, int offset, int size) This method writes several bytes to the i2c device from given buffer at given offset.

Method Detail

write

void write(byte b)
           throws IOException

This method writes one byte directly to i2c device.

Parameters:

b - byte to be written

Throws:

IOException - thrown in case byte cannot be written to the i2c device or i2c bus

write

void write(byte[] buffer,
         int offset,
         int size)
           throws IOException

This method writes several bytes directly to the i2c device from given buffer at given offset.

Parameters:

buffer - buffer of data to be written to the i2c device in one go

offset - offset in buffer

size - number of bytes to be written

Throws:

IOException - thrown in case byte cannot be written to the i2c device or i2c bus

write

void write(int address,
         byte b)
           throws IOException

This method writes one byte to i2c device.

Parameters:

address - local address in the i2c device

b - byte to be written

Throws:

IOException - thrown in case byte cannot be written to the i2c device or i2c bus

write

void write(int address,
         byte[] buffer,
         int offset,
         int size)
           throws IOException

This method writes several bytes to the i2c device from given buffer at given offset.

Parameters:

address - local address in the i2c device

buffer - buffer of data to be written to the i2c device in one go

offset - offset in buffer

size - number of bytes to be written

Throws:

IOException - thrown in case byte cannot be written to the i2c device or i2c bus

read

int read()
         throws IOException

This method reads one byte from the i2c device. Result is between -128 and 127.

Returns:

read byte

Throws:

IOException - thrown in case byte cannot be read from the i2c device or i2c bus

read

int read(byte[] buffer,
       int offset,
       int size)
         throws IOException

This method reads bytes directly from the i2c device to given buffer at asked offset.

Parameters:

buffer - buffer of data to be read from the i2c device in one go

offset - offset in buffer

size - number of bytes to be read

Returns:

number of bytes read

Throws:

IOException - thrown in case byte cannot be read from the i2c device or i2c bus

read

int read(int address)
         throws IOException

This method reads one byte from the i2c device. Result is between -128 and 127.

Parameters:

address - local address in the i2c device

Returns:

Throws:

IOException - thrown in case byte cannot be read from the i2c device or i2c bus

read

int read(int address,
       byte[] buffer,
       int offset,
       int size)
         throws IOException

This method reads bytes from the i2c device to given buffer at asked offset.

Parameters:

address - local address in the i2c device

buffer - buffer of data to be read from the i2c device in one go

offset - offset in buffer

size - number of bytes to be read

Returns:

number of bytes read

Throws:

IOException - thrown in case byte cannot be read from the i2c device or i2c bus