com.dalsemi.onewire.container
Class OneWireContainer05

java.lang.Object
  |
  +--com.dalsemi.onewire.container.OneWireContainer
        |
        +--com.dalsemi.onewire.container.OneWireContainer05

All Implemented Interfaces:

OneWireSensor, SwitchContainer

public class OneWireContainer05

extends OneWireContainer

implements SwitchContainer

1-Wire® container for a Single Addressable Switch, DS2405. This container encapsulates the functionality of the 1-Wire family type 05 (hex)

Features

• Open drain PIO pin controlled through 1-Wire communication
• Logic level sensing of the PIO pin can be sensed
• Operating temperature range from -40°C to +85°C
• One channel with level sensing abilities
• Does not support activity sensing or 'Smart On' capabilities

Memory

The DS2405 has no memory beyond its 64-bit registration number.

Usage

The DS2405 supports level sensing, but not activity sensing. The code below reads the state of the DS2405, extracting the latch state and the sensed level of the PIO pin, then in the loop it toggles the latch state.

      // "ID" is a byte array of size 8 with an address of a part we
      // have already found with family code 05 hex
      // "access" is a DSPortAdapter

      int i=0;
      OneWireContainer05 ds2405 = (OneWireContainer05) access.getDeviceContainer(ID);
      ds2405.setupContainer(access,ID);

      byte[] state = ds2405.readDevice();

      // I know that the 2405 only has one channel (one switch)
      // and it doesn't support 'Smart On'

      boolean latch_state = ds2405.getLatchState(0,state);
      System.out.println("Current state of switch: "+latch_state);
      System.out.println("Current output level:    "+ds2405.getLevel(0,state));
      while (++i < 100)
      {
          System.out.println("Toggling switch");
          ds2405.setLatchState(0,!latch_state,false,state);
          ds2405.writeDevice(state);
          state = ds2405.readDevice();
          latch_state = ds2405.getLatchState(0,state);
          System.out.println("Current state of switch: "+latch_state);
          System.out.println("Current output level:    "+ds2405.getLevel(0,state));
          Thread.sleep(500);
      }

 

Also see the usage example in the SwithContainer interface.

DataSheet

http://pdfserv.maxim-ic.com/arpdf/DS2405.pdf

Also see the DS2406, a dual addressable switch (OneWireContainer12).

Version:

0.00, 28 Aug 2000

Author:

KLA,DSS

See Also:

OneWireSensor, SwitchContainer, OneWireContainer12

Constructor Summary

OneWireContainer05()
Creates a new OneWireContainer for communication with a DS2405.

OneWireContainer05(DSPortAdapter sourceAdapter, byte[] newAddress)
Creates a new OneWireContainer for communication with a DS2405.

OneWireContainer05(DSPortAdapter sourceAdapter, long newAddress)
Creates a new OneWireContainer for communication with a DS2405.

OneWireContainer05(DSPortAdapter sourceAdapter, String newAddress)
Creates a new OneWireContainer for communication with a DS2405.

Method Summary

void	clearActivity() Clears the activity latches the next time possible.
String	getAlternateNames() Retrieves the alternate Dallas Semiconductor part numbers or names.
String	getDescription() Gets a short description of the function of this iButton or 1-Wire Device type.
boolean	getLatchState(int channel, byte[] state) Checks the latch state of the indicated channel.
boolean	getLevel(int channel, byte[] state) Checks the sensed level on the indicated channel.
String	getName() Gets the Dallas Semiconductor part number of the iButton or 1-Wire Device as a java.lang.String.
int	getNumberChannels(byte[] state) Gets the number of channels supported by this switch.
boolean	getSensedActivity(int channel, byte[] state) Checks if the indicated channel has experienced activity.
boolean	hasActivitySensing() Checks if the channels of this switch support activity sensing.
boolean	hasLevelSensing() Checks if the channels of this switch support level sensing.
boolean	hasSmartOn() Checks if the channels of this switch support 'smart on'.
boolean	isHighSideSwitch() Checks if the channels of this switch are 'high side' switches.
boolean	onlySingleChannelOn() Checks if the channels of this switch require that only one channel is on at any one time.
byte[]	readDevice() Retrieves the 1-Wire device sensor state.
void	setLatchState(int channel, boolean latchState, boolean doSmart, byte[] state) Sets the latch state of the indicated channel.
void	writeDevice(byte[] state) Writes the 1-Wire device sensor state that have been changed by 'set' methods.

Methods inherited from class com.dalsemi.onewire.container.OneWireContainer

doSpeed, equals, getAdapter, getAddress, getAddressAsLong, getAddressAsString, getMaxSpeed, getMemoryBanks, hashCode, isAlarming, isPresent, setSpeed, setupContainer, setupContainer, setupContainer, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OneWireContainer05

public OneWireContainer05()

Creates a new OneWireContainer for communication with a DS2405. Note that the method setupContainer(com.dalsemi.onewire.adapter.DSPortAdapter,byte[]) must be called to set the correct DSPortAdapter device address.

See Also:

setupContainer(DSPortAdapter,byte[]), OneWireContainer05(DSPortAdapter,byte[]), OneWireContainer05(DSPortAdapter,long), OneWireContainer05(DSPortAdapter,String)

OneWireContainer05

public OneWireContainer05(DSPortAdapter sourceAdapter,
                          byte[] newAddress)

Creates a new OneWireContainer for communication with a DS2405.

Parameters:

sourceAdapter - adapter object required to communicate with this 1-Wire device

newAddress - address of this DS2405

See Also:

OneWireContainer05(), OneWireContainer05(DSPortAdapter,long), OneWireContainer05(DSPortAdapter,String)

OneWireContainer05

public OneWireContainer05(DSPortAdapter sourceAdapter,
                          long newAddress)

Creates a new OneWireContainer for communication with a DS2405.

Parameters:

sourceAdapter - adapter object required to communicate with this 1-Wire device

newAddress - address of this DS2405

See Also:

OneWireContainer05(), OneWireContainer05(DSPortAdapter,byte[]), OneWireContainer05(DSPortAdapter,String)

OneWireContainer05

public OneWireContainer05(DSPortAdapter sourceAdapter,
                          String newAddress)

Creates a new OneWireContainer for communication with a DS2405.

Parameters:

sourceAdapter - adapter object required to communicate with this 1-Wire device

newAddress - address of this DS2405

See Also:

OneWireContainer05(), OneWireContainer05(DSPortAdapter,byte[]), OneWireContainer05(DSPortAdapter,long)

Method Detail

getName

public String getName()

Gets the Dallas Semiconductor part number of the iButton or 1-Wire Device as a java.lang.String. For example "DS1992".

Overrides:

getName in class OneWireContainer

Returns:

iButton or 1-Wire device name

getAlternateNames

public String getAlternateNames()

Retrieves the alternate Dallas Semiconductor part numbers or names. A 'family' of MicroLAN devices may have more than one part number depending on packaging. There can also be nicknames such as "Crypto iButton".

Overrides:

getAlternateNames in class OneWireContainer

Returns:

the alternate names for this iButton or 1-Wire device

getDescription

public String getDescription()

Gets a short description of the function of this iButton or 1-Wire Device type.

Overrides:

getDescription in class OneWireContainer

Returns:

device description

getNumberChannels

public int getNumberChannels(byte[] state)

Gets the number of channels supported by this switch. Channel specific methods will use a channel number specified by an integer from [0 to (getNumberChannels(byte[]) - 1)]. Note that all devices of the same family will not necessarily have the same number of channels.

Specified by:

getNumberChannels in interface SwitchContainer

Parameters:

state - current state of the device returned from readDevice()

Returns:

the number of channels for this device

See Also:

OneWireSensor.readDevice()

isHighSideSwitch

public boolean isHighSideSwitch()

Checks if the channels of this switch are 'high side' switches. This indicates that when 'on' or true, the switch output is connect to the 1-Wire data. If this method returns false then when the switch is 'on' or true, the switch is connected to ground.

Specified by:

isHighSideSwitch in interface SwitchContainer

Returns:

true if the switch is a 'high side' switch, false if the switch is a 'low side' switch

See Also:

getLatchState(int,byte[])

hasActivitySensing

public boolean hasActivitySensing()

Checks if the channels of this switch support activity sensing. If this method returns true then the method getSensedActivity(int,byte[]) can be used.

Specified by:

hasActivitySensing in interface SwitchContainer

Returns:

true if channels support activity sensing

See Also:

getSensedActivity(int,byte[]), clearActivity()

hasLevelSensing

public boolean hasLevelSensing()

Checks if the channels of this switch support level sensing. If this method returns true then the method getLevel(int,byte[]) can be used.

Specified by:

hasLevelSensing in interface SwitchContainer

Returns:

true if channels support level sensing

See Also:

getLevel(int,byte[])

hasSmartOn

public boolean hasSmartOn()

Checks if the channels of this switch support 'smart on'. Smart on is the ability to turn on a channel such that only 1-Wire device on this channel are awake and ready to do an operation. This greatly reduces the time to discover the device down a branch. If this method returns true then the method setLatchState(int,boolean,boolean,byte[]) can be used with the doSmart parameter true.

Specified by:

hasSmartOn in interface SwitchContainer

Returns:

true if channels support 'smart on'

See Also:

setLatchState(int,boolean,boolean,byte[])

onlySingleChannelOn

public boolean onlySingleChannelOn()

Checks if the channels of this switch require that only one channel is on at any one time. If this method returns true then the method setLatchState(int,boolean,boolean,byte[]) will not only affect the state of the given channel but may affect the state of the other channels as well to insure that only one channel is on at a time.

Specified by:

onlySingleChannelOn in interface SwitchContainer

Returns:

true if only one channel can be on at a time.

See Also:

setLatchState(int,boolean,boolean,byte[])

getLevel

public boolean getLevel(int channel,
                        byte[] state)

Checks the sensed level on the indicated channel. To avoid an exception, verify that this switch has level sensing with the hasLevelSensing(). Level sensing means that the device can sense the logic level on its PIO pin.

Specified by:

getLevel in interface SwitchContainer

Parameters:

channel - channel to execute this operation, in the range [0 to (getNumberChannels(byte[]) - 1)]

state - current state of the device returned from readDevice()

Returns:

true if level sensed is 'high' and false if level sensed is 'low'

See Also:

OneWireSensor.readDevice(), hasLevelSensing()

getLatchState

public boolean getLatchState(int channel,
                             byte[] state)

Checks the latch state of the indicated channel.

Specified by:

getLatchState in interface SwitchContainer

Parameters:

channel - channel to execute this operation, in the range [0 to (getNumberChannels(byte[]) - 1)]

state - current state of the device returned from readDevice()

Returns:

true if channel latch is 'on' or conducting and false if channel latch is 'off' and not conducting. Note that the actual output when the latch is 'on' is returned from the isHighSideSwitch() method.

See Also:

OneWireSensor.readDevice(), isHighSideSwitch(), setLatchState(int,boolean,boolean,byte[])

getSensedActivity

public boolean getSensedActivity(int channel,
                                 byte[] state)
                          throws OneWireException

Checks if the indicated channel has experienced activity. This occurs when the level on the PIO pins changes. To clear the activity that is reported, call clearActivity(). To avoid an exception, verify that this device supports activity sensing by calling the method hasActivitySensing().

Specified by:

getSensedActivity in interface SwitchContainer

Parameters:

channel - channel to execute this operation, in the range [0 to (getNumberChannels(byte[]) - 1)]

state - current state of the device returned from readDevice()

Returns:

true if activity was detected and false if no activity was detected

Throws:

OneWireException - if this device does not have activity sensing

See Also:

hasActivitySensing(), clearActivity()

clearActivity

public void clearActivity()
                   throws OneWireException

Clears the activity latches the next time possible. For example, on a DS2406/07, this happens the next time the status is read with readDevice().

Specified by:

clearActivity in interface SwitchContainer

Throws:

OneWireException - if this device does not support activity sensing

See Also:

OneWireSensor.readDevice(), getSensedActivity(int,byte[])

setLatchState

public void setLatchState(int channel,
                          boolean latchState,
                          boolean doSmart,
                          byte[] state)

Sets the latch state of the indicated channel. The method writeDevice() must be called to finalize changes to the device. Note that multiple 'set' methods can be called before one call to writeDevice().

Specified by:

setLatchState in interface SwitchContainer

Parameters:

channel - channel to execute this operation, in the range [0 to (getNumberChannels(byte[]) - 1)]

latchState - true to set the channel latch 'on' (conducting) and false to set the channel latch 'off' (not conducting). Note that the actual output when the latch is 'on' is returned from the isHighSideSwitch() method.

doSmart - If latchState is 'on'/true then doSmart indicates if a 'smart on' is to be done. To avoid an exception check the capabilities of this device using the hasSmartOn() method.

state - current state of the device returned from readDevice()

See Also:

hasSmartOn(), getLatchState(int,byte[]), OneWireSensor.writeDevice(byte[])

readDevice

public byte[] readDevice()
                  throws OneWireIOException,
                         OneWireException

Retrieves the 1-Wire device sensor state. This state is returned as a byte array. Pass this byte array to the 'get' and 'set' methods. If the device state needs to be changed then call the 'writeDevice' to finalize the changes.

Specified by:

readDevice in interface OneWireSensor

Returns:

1-Wire device sensor state

Throws:

OneWireIOException - on a 1-Wire communication error such as reading an incorrect CRC from a 1-Wire device. This could be caused by a physical interruption in the 1-Wire Network due to shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.

OneWireException - on a communication or setup error with the 1-Wire adapter

writeDevice

public void writeDevice(byte[] state)
                 throws OneWireIOException,
                        OneWireException

Writes the 1-Wire device sensor state that have been changed by 'set' methods. Only the state registers that changed are updated. This is done by referencing a field information appended to the state data.

Specified by:

writeDevice in interface OneWireSensor

Parameters:

state - 1-Wire device sensor state

Throws:

OneWireIOException - on a 1-Wire communication error such as reading an incorrect CRC from a 1-Wire device. This could be caused by a physical interruption in the 1-Wire Network due to shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.

OneWireException - on a communication or setup error with the 1-Wire adapter