hades.models.register
Class LFSRGenerator

java.lang.Object
  hades.simulator.SimObject
      hades.models.gates.GenericGate
          hades.models.register.LFSRGenerator

All Implemented Interfaces:

java.lang.Cloneable, ContextToolTip, java.io.Serializable, Simulatable

Direct Known Subclasses:

LFSRGenerator16, LFSRGenerator24, LFSRGenerator32, LFSRGenerator8

public class LFSRGenerator

extends GenericGate

implements Simulatable

LFSRGenerator: abstract base class for LFSR pseudorandom value generators based on the (31 3 0) polynom. Subclasses will output some of the (lower) bits of the LFSR to ports. Use setValue() and getValue() to initialize and read-out the generator.

See Also:

Serialized Form

Field Summary

protected int	n_outputs
protected PortStdLogic1164	port_CLK
protected PortStdLogic1164	port_NRESET

Fields inherited from class hades.models.gates.GenericGate

t_delay

Fields inherited from class hades.simulator.SimObject

classloader, console, debug, editor, name, parent, ports, propertySheet, simulator, symbol, versionId, visible

Constructor Summary

LFSRGenerator(int n_outputs)

Method Summary

void	configure() create and display a 'ConfigDialog' to set the parameters for a SimObject.
void	elaborate(java.lang.Object arg) on elaboration, set the initial value of the LFSR32 to "seed".
void	evaluate(java.lang.Object arg) evaluate: on a rising-edge of the CLK input calculate a new shift-register value, and put the lower bits of the new value on the Q outputs.
int	getSeed()
java.lang.String	getToolTip(java.awt.Point position, long millis) construct a (short) tool tip message for a logic gate with name, class name, and gate delay.
int	getValue()
boolean	initialize(java.lang.String s) initialize the LFSR from a String that contains the integer version id of this gate, its propagation delay (in seconds), and the initial (seed) value for the shift-register, e.g.
void	setSeed(int seed)
void	setSeed(java.lang.String s)
void	setValue(int value)
void	setValue(java.lang.String s)
void	write(java.io.PrintWriter ps) write "versionId", gate delay "t_delay", seed "seed"

Methods inherited from class hades.models.gates.GenericGate

copy, getDelay, scheduleEvent, scheduleEventAfter, scheduleOutputValue, scheduleOutputValueAfter, setDelay, setDelay

Methods inherited from class hades.simulator.SimObject

constructDynamicSymbol, getBindkey, getClassLoader, getDebug, getEditor, getExternalResources, getFullName, getName, getParent, getPort, getPorts, getPropertySheet, getResourceAsStream, getSimulator, getSymbol, getSymbolResourceName, getVersionId, isVisible, keyPressed, message, mousePressed, needsDynamicSymbol, needsExternalResources, setClassLoader, setConsole, setDebug, setEditor, setName, setParent, setPorts, setSimulator, setSymbol, setVersionId, setVisible, tearDown, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface hades.simulator.Simulatable

message

Field Detail

n_outputs

protected int n_outputs

port_CLK

protected PortStdLogic1164 port_CLK

port_NRESET

protected PortStdLogic1164 port_NRESET

Constructor Detail

LFSRGenerator

public LFSRGenerator(int n_outputs)

Method Detail

elaborate

public void elaborate(java.lang.Object arg)

on elaboration, set the initial value of the LFSR32 to "seed".

Specified by:

elaborate in interface Simulatable

Overrides:

elaborate in class GenericGate

evaluate

public void evaluate(java.lang.Object arg)

evaluate: on a rising-edge of the CLK input calculate a new shift-register value, and put the lower bits of the new value on the Q outputs.

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class SimObject

Parameters:

arg - an arbitrary object argument

write

public void write(java.io.PrintWriter ps)

write "versionId", gate delay "t_delay", seed "seed"

Overrides:

write in class GenericGate

initialize

public boolean initialize(java.lang.String s)

initialize the LFSR from a String that contains the integer version id of this gate, its propagation delay (in seconds), and the initial (seed) value for the shift-register, e.g. '1001 0.5E-8 12343775'.

Overrides:

initialize in class GenericGate

getValue

public int getValue()

setValue

public void setValue(java.lang.String s)

setValue

public void setValue(int value)

getSeed

public int getSeed()

setSeed

public void setSeed(java.lang.String s)

setSeed

public void setSeed(int seed)

configure

public void configure()

Description copied from class: SimObject

create and display a 'ConfigDialog' to set the parameters for a SimObject. The default ConfigDialog for the base class (SimObject) itself is empty except for the 'instance name' of the SimObject.

Overrides:

configure in class GenericGate

getToolTip

public java.lang.String getToolTip(java.awt.Point position,
                                   long millis)

Description copied from class: GenericGate

construct a (short) tool tip message for a logic gate with name, class name, and gate delay.

Specified by:

getToolTip in interface ContextToolTip

Overrides:

getToolTip in class GenericGate