de.wagner_ibw.iow.i2c
Class LM75

java.lang.Object
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  +--de.wagner_ibw.iow.i2c.AbstractI2CDevice
        |
        +--de.wagner_ibw.iow.i2c.LM75

All Implemented Interfaces:

I2CDevice

public class LM75

extends AbstractI2CDevice

This is the implemenation of the LM75 device , "Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface", by National Semiconductors.

This class almost supports features of the device:

• Read the current temperature.
• Setting OS and HYST temperature.
• Setting Comparator/Interrupt mode for the O.S. pin.
• Setting O.S. Polarity

Unsupported features are:

• Resetting the device.
• Setting the device to low power shutdown mode.
• Reporting the Fault Queue.

Author:

Thomas Wagner

Field Summary

static int	CLASS Group 1 part of slave address for LM75 (LM75 device specific constant).
static int	MODE_COMPARATOR Constant for 'Comparator' mode.
static int	MODE_INTERRUPT Constant for 'Interrupt' mode.
static java.lang.String	NAME PCF8570 device specific constants.
static int	POLARITY_ACTIVE_HIGH Constant for O.S. output polarity 'active high'.
static int	POLARITY_ACTIVE_LOW Constant for O.S. output polarity 'active low'.
static int	REG_CONFIG Constant for register pointer for 'Configuration' register (LM75 device specific constant).
static int	REG_TEMP Constant for register pointer for 'Temperature' register (LM75 device specific constant).
static int	REG_TEMP_HYST Constant for register pointer for 'THyst Set Point' register (LM75 device specific constant).
static int	REG_TEMP_OS Constant for register pointer for 'TOS Set Point' register (LM75 device specific constant).

Fields inherited from class de.wagner_ibw.iow.i2c.AbstractI2CDevice

MAX_I2C_LENGTH

Constructor Summary

LM75(int deviceAddress)
Constructor

Method Summary

boolean	equals(java.lang.Object o) Indicates whether some other LM75 object is "equal to" this one.
void	getConfiguration()
int	getMode() Getter for mode of this LM75 device.
int	getPolarity() Getter for polarity of this LM75 device.
double	getT() Returns Current temperature measured by this LM75.
double	getTHyst() Returns THYST set point stored in this LM75.
double	getTOs() Returns TOS set point stored in this LM75.
int	hashCode() Returns a hash code value for this LM75 object.
void	setConfiguration(int mode, int polarity)
void	setIowDevice(AbstractIowDevice iow) Sets the reference to an IO-Warrior device for write report operations.
void	setTHyst(double value) Sets THYST set point in this LM75.
void	setTOs(double value) Sets TOS set point in this LM75.
java.lang.String	toString() Returns Information about this LM75 as String.

Methods inherited from class de.wagner_ibw.iow.i2c.AbstractI2CDevice

getI2cAddress, getName, readI2C, reportReceived, setMonitor, writeI2C

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

NAME

public static final java.lang.String NAME

PCF8570 device specific constants.

See Also:

Constant Field Values

CLASS

public static final int CLASS

Group 1 part of slave address for LM75 (LM75 device specific constant).

See Also:

Constant Field Values

REG_TEMP

public static final int REG_TEMP

Constant for register pointer for 'Temperature' register (LM75 device specific constant).

See Also:

Constant Field Values

REG_CONFIG

public static final int REG_CONFIG

Constant for register pointer for 'Configuration' register (LM75 device specific constant).

See Also:

Constant Field Values

REG_TEMP_HYST

public static final int REG_TEMP_HYST

Constant for register pointer for 'THyst Set Point' register (LM75 device specific constant).

See Also:

Constant Field Values

REG_TEMP_OS

public static final int REG_TEMP_OS

Constant for register pointer for 'TOS Set Point' register (LM75 device specific constant).

See Also:

Constant Field Values

MODE_COMPARATOR

public static final int MODE_COMPARATOR

Constant for 'Comparator' mode.

See Also:

Constant Field Values

MODE_INTERRUPT

public static final int MODE_INTERRUPT

Constant for 'Interrupt' mode.

See Also:

Constant Field Values

POLARITY_ACTIVE_LOW

public static final int POLARITY_ACTIVE_LOW

Constant for O.S. output polarity 'active low'.

See Also:

Constant Field Values

POLARITY_ACTIVE_HIGH

public static final int POLARITY_ACTIVE_HIGH

Constant for O.S. output polarity 'active high'.

See Also:

Constant Field Values

Constructor Detail

LM75

public LM75(int deviceAddress)
     throws java.lang.Exception

Constructor

Parameters:

deviceAddress - Group 2 part of slave address (possible values 0...7).

Throws:

java.lang.Exception - If anything goes wrong.

Method Detail

getT

public double getT()
            throws java.lang.Exception

Returns Current temperature measured by this LM75.

Returns:

Temperature as double value from this LM75.

Throws:

java.lang.Exception - If anything goes wrong.

getConfiguration

public void getConfiguration()
                      throws java.lang.Exception

java.lang.Exception

getTHyst

public double getTHyst()
                throws java.lang.Exception

Returns THYST set point stored in this LM75.

Returns:

HYST temperature as double value from this LM75.

Throws:

java.lang.Exception - If anything goes wrong.

getTOs

public double getTOs()
              throws java.lang.Exception

Returns TOS set point stored in this LM75.

Returns:

OS temperature as double value from this LM75.

Throws:

java.lang.Exception - If anything goes wrong.

setConfiguration

public void setConfiguration(int mode,
                             int polarity)
                      throws java.lang.Exception

java.lang.Exception

setTHyst

public void setTHyst(double value)
              throws java.lang.Exception

Sets THYST set point in this LM75.

Parameters:

value - Desired HYST temperature as doubel value.

java.lang.Exception

setTOs

public void setTOs(double value)
            throws java.lang.Exception

Sets TOS set point in this LM75.

Parameters:

value - Desired OS temperature as doubel value.

java.lang.Exception

getMode

public int getMode()

Getter for mode of this LM75 device.

Returns:

Mode of this I2C device.

getPolarity

public int getPolarity()

Getter for polarity of this LM75 device.

Returns:

Polarity of this I2C device.

setIowDevice

public void setIowDevice(AbstractIowDevice iow)

Description copied from interface: I2CDevice

Sets the reference to an IO-Warrior device for write report operations.

Specified by:

setIowDevice in interface I2CDevice

Specified by:

setIowDevice in class AbstractI2CDevice

Parameters:

iow - Instance of an IO-Warrior device.

toString

public java.lang.String toString()

Returns Information about this LM75 as String.

Overrides:

toString in class AbstractI2CDevice

Returns:

String representation of information obout this LM75 (slave address, temperatures, ...).

equals

public boolean equals(java.lang.Object o)

Indicates whether some other LM75 object is "equal to" this one. Criterias are the i2c device class and i2c device address (in I2CAddress).

Overrides:

equals in class AbstractI2CDevice

Returns:

True if this object is the same as the obj argument; false otherwise.

Since:

0.9.4

hashCode

public int hashCode()

Returns a hash code value for this LM75 object. It is derived from the i2c device class and i2c device address.

Overrides:

hashCode in class AbstractI2CDevice

Returns:

a hash code value for this object.

Since:

0.9.4