jdk.dio.i2cbus

Class I2CDeviceConfig

java.lang.Object

jdk.dio.i2cbus.I2CDeviceConfig

All Implemented Interfaces:

DeviceConfig<I2CDevice>, DeviceConfig.HardwareAddressing

public final class I2CDeviceConfig
extends java.lang.Object
implements DeviceConfig<I2CDevice>, DeviceConfig.HardwareAddressing

The I2CDeviceConfig class encapsulates the hardware addressing information, and static and dynamic configuration parameters of an I2C slave device.

Some hardware addressing parameter, and static and dynamic configuration parameters may be set to DeviceConfig.DEFAULT. Whether such default settings are supported is platform- as well as device driver-dependent.

An instance of I2CDeviceConfig can be passed to the DeviceManager.open(DeviceConfig) or DeviceManager.open(Class, DeviceConfig) method to open the designated I2C slave device with the specified configuration. A InvalidDeviceConfigException is thrown when attempting to open a device with an invalid or unsupported configuration.

See Also:

DeviceManager.open(DeviceConfig), DeviceManager.open(Class, DeviceConfig)

Nested Class Summary

Nested classes/interfaces inherited from interface jdk.dio.DeviceConfig

DeviceConfig.HardwareAddressing

Field Summary

Fields

Modifier and Type	Field and Description
static int	ADDR_SIZE_10 10 bit slave address.
static int	ADDR_SIZE_7 7 bit slave address.

Fields inherited from interface jdk.dio.DeviceConfig

DEFAULT

Constructor Summary

Constructors

Constructor and Description
I2CDeviceConfig(int controllerNumber, int address, int addressSize, int clockFrequency) Creates a new I2CDeviceConfig with the specified hardware addressing information and configuration parameters.
I2CDeviceConfig(java.lang.String controllerName, int address, int addressSize, int clockFrequency) Creates a new I2CDeviceConfig with the specified hardware addressing information and configuration parameters.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Checks two I2CDeviceConfig objects for equality.
int	getAddress() Gets the configured address of the I2C slave device.
int	getAddressSize() Gets the configured address size of the I2C slave device.
int	getClockFrequency() Gets the configured clock frequency (in Hz) supported by the I2C slave device.
java.lang.String	getControllerName() Gets the configured controller name (such as its device file name on UNIX systems).
int	getControllerNumber() Gets the configured controller number (the controller number the I2C bus adapter the I2C slave device is connected to).
int	hashCode() Returns the hash code value for this object.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

ADDR_SIZE_7

public static final int ADDR_SIZE_7

7 bit slave address.

See Also:

Constant Field Values

ADDR_SIZE_10

public static final int ADDR_SIZE_10

10 bit slave address.

See Also:

Constant Field Values

Constructor Detail

I2CDeviceConfig

public I2CDeviceConfig(int controllerNumber,
               int address,
               int addressSize,
               int clockFrequency)

Creates a new I2CDeviceConfig with the specified hardware addressing information and configuration parameters.

Parameters:

controllerNumber - the number of the bus the slave device is connected to (a positive or zero integer) or DeviceConfig.DEFAULT.

address - the address of the slave device on the bus (a positive or zero integer).

addressSize - the address size: ADDR_SIZE_7 bits, ADDR_SIZE_10 bits or DeviceConfig.DEFAULT.

clockFrequency - the clock frequency of the slave device in Hz (a positive integer) or DeviceConfig.DEFAULT.

Throws:

java.lang.IllegalArgumentException - if any of the following is true:

• controllerNumber is not in the defined range;
• address is not in the defined range;
• addressSize is not in the defined range;
• clockFrequency is not in the defined range.

I2CDeviceConfig

public I2CDeviceConfig(java.lang.String controllerName,
               int address,
               int addressSize,
               int clockFrequency)

Creates a new I2CDeviceConfig with the specified hardware addressing information and configuration parameters.

Parameters:

controllerName - the controller name (such as its device file name on UNIX systems).

address - the address of the slave device on the bus (a positive or zero integer).

addressSize - the address size: ADDR_SIZE_7 bits, ADDR_SIZE_10 bits or DeviceConfig.DEFAULT.

clockFrequency - the clock frequency of the slave device in Hz (a positive integer) or DeviceConfig.DEFAULT.

Throws:

java.lang.IllegalArgumentException - if any of the following is true:

• address is not in the defined range;
• addressSize is not in the defined range;
• clockFrequency is not in the defined range.

java.lang.NullPointerException - if controllerName is null.

Method Detail

getAddress

public int getAddress()

Gets the configured address of the I2C slave device.

Returns:

the address of the slave device on the bus (a positive or zero integer).

getAddressSize

public int getAddressSize()

Gets the configured address size of the I2C slave device.

Returns:

the address size: ADDR_SIZE_7 bits, ADDR_SIZE_10 bits or DeviceConfig.DEFAULT.

getControllerNumber

public int getControllerNumber()

Gets the configured controller number (the controller number the I2C bus adapter the I2C slave device is connected to).

Specified by:

getControllerNumber in interface DeviceConfig.HardwareAddressing

Returns:

the controller number (a positive or zero integer) or DeviceConfig.DEFAULT.

getControllerName

public java.lang.String getControllerName()

Gets the configured controller name (such as its device file name on UNIX systems).

Specified by:

getControllerName in interface DeviceConfig.HardwareAddressing

Returns:

the controller name or null.

getClockFrequency

public int getClockFrequency()

Gets the configured clock frequency (in Hz) supported by the I2C slave device.

Returns:

the clock frequency of the slave device in Hz (a positive integer) or DeviceConfig.DEFAULT.

hashCode

public int hashCode()

Returns the hash code value for this object.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.

equals

public boolean equals(java.lang.Object obj)

Checks two I2CDeviceConfig objects for equality.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object to test for equality with this object.

Returns:

true if obj is a I2CDeviceConfig and has the same hardware addressing information and configuration parameter values as this I2CDeviceConfig object.