Class OneWireContainer1C

java.lang.Object
com.dalsemi.onewire.container.OneWireContainer
com.dalsemi.onewire.container.OneWireContainer1C
All Implemented Interfaces:
OneWireSensor, SwitchContainer

public class OneWireContainer1C extends OneWireContainer implements SwitchContainer

1-Wire® container for a Addressable 1-Wire 4K-bit EEPROM, DS28E04. This container encapsulates the functionality of the 1-Wire family type 1C (hex)

Features

  • 4096 bits of EEPROM memory partitioned into 16 pages of 256 bits.
  • Seven address inputs for physical location configuration.
  • 2 general-purpose I/O pins with pulse generation capability.
  • Individual Memory pages can be permanently write-protected or put in OTP EPROM-emulation mode ("write to 0").
  • Supports 1-Wire Conditional Search command with response controlled by programmable PIO conditions
  • Supports Overdrive mode which boosts communication speed up to 125k bits per second.

Usage

See Also:
  • Field Details

    • PIO_ACCESS_READ

      public static final byte PIO_ACCESS_READ
      Reads the PIO logical status in an endless loops
      See Also:
    • PIO_ACCESS_WRITE

      public static final byte PIO_ACCESS_WRITE
      Writes the PIO output latch
      See Also:
    • PIO_ACCESS_PULSE

      public static final byte PIO_ACCESS_PULSE
      Generates a pulse on the selected PIOs
      See Also:
    • RESET_ACTIVITY_LATCHES

      public static final byte RESET_ACTIVITY_LATCHES
      Generates a pulse on the selected PIOs
      See Also:
    • WRITE_REGISTER

      public static final byte WRITE_REGISTER
      Writes the value to the Conditional Search registers or Control/Status register
      See Also:
  • Constructor Details

  • Method Details

    • getName

      public String getName()
      Gets the Maxim Integrated Products part number of the iButton or 1-Wire Device as a java.lang.String.
      Overrides:
      getName in class OneWireContainer
      Returns:
      iButton or 1-Wire device name
    • getMemoryBanks

      public Enumeration<MemoryBank> getMemoryBanks()
      Gets an enumeration of memory bank instances that implement one or more of the following interfaces: MemoryBank, PagedMemoryBank, and OTPMemoryBank.
      Overrides:
      getMemoryBanks in class OneWireContainer
      Returns:
      Enumeration of memory banks
      See Also:
    • getAlternateNames

      public String getAlternateNames()
      Retrieves the alternate Maxim Integrated Products 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • 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:
    • setLatchState

      public void setLatchState(byte set, byte[] state)
      Sets the latch state for all of the channels. 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().
      Parameters:
      set - the state to set all of the channels, in the range [0 to (getNumberChannels(byte[]) - 1)]
      state - current state of the device returned from readDevice()
      See Also:
    • 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
    • readRegister

      public byte[] readRegister() throws OneWireIOException, OneWireException
      Retrieves the 1-Wire device register mask. This register is returned as a byte array. Pass this byte array to the 'get' and 'set' methods. If the device register mask needs to be changed then call the 'writeRegister' to finalize the changes.
      Returns:
      1-Wire device register mask
      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
      Updates the latch state for the 2 general purpose PIO pins. This has the side-effect of also sampling the PIO pins level after updating the latch, so the state buffer is updated with this new level information.
      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
    • writeRegister

      public void writeRegister(byte[] register) throws OneWireIOException, OneWireException
      Writes the 1-Wire device register mask that have been changed by 'set' methods.
      Parameters:
      register - 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
    • isVccPowered

      public boolean isVccPowered(byte[] register) throws OneWireIOException, OneWireException
      Retrieves the state of the VCC pin. If the pin is powered 'TRUE' is returned else 'FALSE' is returned if the pin is grounded.
      Returns:
      true if VCC is powered and false if it is grounded.
      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
    • getDefaultPolarity

      public boolean getDefaultPolarity(byte[] register)
    • getPowerOnResetLatch

      public boolean getPowerOnResetLatch(byte[] register)
    • clearPowerOnReset

      public void clearPowerOnReset(byte[] register)
      Checks if the Power On Reset if on and if so clears it.
      Parameters:
      register - current register for conditional search, which if returned from readRegister()
    • orConditionalSearch

      public void orConditionalSearch(byte[] register)
      Checks if the 'or' Condition Search is set and if not sets it.
      Parameters:
      register - current register for conditional search, which if returned from readRegister()
    • andConditionalSearch

      public void andConditionalSearch(byte[] register)
      Checks if the 'and' Conditional Search is set and if not sets it.
      Parameters:
      register - current register for conditional search, which if returned from readRegister()
    • setConditionalSearchLogicLevel

      public void setConditionalSearchLogicLevel(byte[] register)
      Checks if the 'PIO Level' Conditional Search is set for input and if not sets it.
      Parameters:
      register - current register for conditional search, which if returned from readRegister()
    • setConditionalSearchActivity

      public void setConditionalSearchActivity(byte[] register)
      Checks if the 'PIO Activity latches' are set for Conditional Search and if not sets it.
      Parameters:
      register - current register for conditional search, which if returned from readRegister()
    • setChannelMask

      public void setChannelMask(int channel, boolean set, byte[] register)
      Sets the channel passed to the proper state depending on the set parameter for responding to the Conditional Search.
      Parameters:
      channel - current channel to set
      set - whether to turn the channel on/off for Conditional Search
      register - current register for conditional search, which if returned from readRegister()
    • setChannelPolarity

      public void setChannelPolarity(int channel, boolean set, byte[] register)
      Sets the channel passed to the proper state depending on the set parameter for the correct polarity in the Conditional Search.
      Parameters:
      channel - current channel to set
      set - whether to turn the channel on/off for polarity Conditional Search
      register - current register for conditional search, which if returned from readRegister()
    • getChannelMask

      public boolean getChannelMask(int channel, byte[] register)
      Retrieves the information if the channel is masked for the Conditional Search.
      Parameters:
      channel - current channel to set
      register - current register for conditional search, which if returned from readRegister()
      Returns:
      true if the channel is masked and false other wise.
    • getChannelPolarity

      public boolean getChannelPolarity(int channel, byte[] register)
      Retrieves the polarity of the channel for the Conditional Search.
      Parameters:
      channel - current channel to set
      register - current register for conditional search, which if returned from readRegister()
      Returns:
      true if the channel is masked and false other wise.