cork.module.ti
Class PCF8574

java.lang.Object
  |
  +--cork.device.AbstractDevice
        |
        +--cork.net.i2c.AbstractI2CDevice
              |
              +--cork.module.ti.PCF8574

All Implemented Interfaces:

Device, I2CDevice

public class PCF8574

extends AbstractI2CDevice

Driver for controlling a Texas Instruments PCF8574 Remote 8-Bit I/O Expander chip.

The IO port can be controlled as an array of 8 boolean values, or as a byte value where the binary representation of a number between 0 and 255 sets the bits of the port. e.g. setting the byte to 0 (binary=00000000) will set all 8 physical buts to logic low, and setting the byte to 255 (binary=11111111) will set all 8 bits on teh physical device to logic high.

Version:

0.1.1

Author:

Brill Pappin

Field Summary

static int	ADDRESS_56 Description of the Field
static int	ADDRESS_57 Description of the Field
static int	ADDRESS_58 Description of the Field
static int	ADDRESS_59 Description of the Field
static int	ADDRESS_60 Description of the Field
static int	ADDRESS_61 Description of the Field
static int	ADDRESS_62 Description of the Field
static int	ADDRESS_63 Description of the Field

Constructor Summary

PCF8574(int address)
Constructor for the PCF8574 object.

Method Summary

void	getBits(boolean[] buffer) Gets the bits of the PCF8574 object.
int	getByte() Gets the bits of the PCF8574 object.
java.lang.String	getDeviceDestription() Gets the deviceDestription attribute of the CMPS03 object
java.lang.String	getDeviceName() Gets the deviceName attribute of the CMPS03 object
I2CDevice	getI2CDevice() Gets this instance.
void	setBits(boolean[] bits) Sets the bits of the PCF8574 object.
void	setByte(int bits) Sets the bits of the PCF8574 object.

Methods inherited from class cork.net.i2c.AbstractI2CDevice

capture, destroy, getBusMaster, getDeviceAddress, isCaptured, read, release, start, stop, tick, write

Methods inherited from class cork.device.AbstractDevice

addEventListener, removeEventListener, sendDeviceEvent

Methods inherited from class java.lang.Object

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

Field Detail

ADDRESS_56

public static final int ADDRESS_56

Description of the Field

Since:

ADDRESS_57

public static final int ADDRESS_57

Description of the Field

Since:

ADDRESS_58

public static final int ADDRESS_58

Description of the Field

Since:

ADDRESS_59

public static final int ADDRESS_59

Description of the Field

Since:

ADDRESS_60

public static final int ADDRESS_60

Description of the Field

Since:

ADDRESS_61

public static final int ADDRESS_61

Description of the Field

Since:

ADDRESS_62

public static final int ADDRESS_62

Description of the Field

Since:

ADDRESS_63

public static final int ADDRESS_63

Description of the Field

Since:

Constructor Detail

PCF8574

public PCF8574(int address)

Constructor for the PCF8574 object. Select the address from the constants in this class that correspond to the phyisical address set on your device. If no address is set, teh device will default to ADDRESS_56.

Parameters:

address - The address that the physical device has been pinstrapped to. The default if no pins are strapped is ADDRESS_56.

Since:

0.1.0

Method Detail

getBits

public void getBits(boolean[] buffer)
             throws I2CException

Gets the bits of the PCF8574 object. The boolean values correspond to P0-P7 on the physical device.

Parameters:

buffer - The buffer to put the bits into. The buffer should have a length of at least 8.

Throws:

I2CException - if the bits can not be returned for some reason.

Since:

0.1.0

getByte

public int getByte()
            throws I2CException

Gets the bits of the PCF8574 object.

Returns:

int all 8 bits as a byte

Throws:

I2CException - Description of Exception

Since:

0.1.1

getDeviceName

public java.lang.String getDeviceName()

Gets the deviceName attribute of the CMPS03 object

Returns:

The deviceName value

Since:

0.1.0

getDeviceDestription

public java.lang.String getDeviceDestription()

Gets the deviceDestription attribute of the CMPS03 object

Returns:

The deviceDestription value

Since:

0.1.0

getI2CDevice

public I2CDevice getI2CDevice()

Gets this instance.

Overrides:

getI2CDevice in class AbstractI2CDevice

Returns:

The i2CDevice value

Since:

0.1.0

setByte

public void setByte(int bits)
             throws I2CException

Sets the bits of the PCF8574 object.

Parameters:

bits - int all 8 bits as a byte.

Throws:

I2CException - if the bits can not be set for some reason.

Since:

0.1.1

setBits

public final void setBits(boolean[] bits)
                   throws I2CException

Sets the bits of the PCF8574 object. The boolean values correspond to P0-P7 on the physical device.

Parameters:

bits - a boolean array with a length of at least 8.

Throws:

I2CException - if the bits can not be set for some reason.

Since:

0.1.0