hades.models.io
Class GalFuse

java.lang.Object
  hades.simulator.SimObject
      hades.models.gates.GenericGate
          hades.models.io.GalFuse

All Implemented Interfaces:

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

public class GalFuse

extends GenericGate

implements Simulatable

GalFuse: an interactive switch (with builtin diode) useful for demonstrating ROM, PLA, or GAL arrays. This model uses the std_logic levels to simulate the "bipolar" DIODE-based implementation of a active-low AND-matrix connection. (This differs from the actual NOR-NOR based single-NMOS-transistor realization in current MOS technologies, where the switch element is inverting...)

The behaviour is as follows: If the fuse is ok and the input is LOW (0), the output will be LOW (0). If the fuse is ok and the input is HIGH (1), the output will be TRISTATE (Z). If the fuse is ok and the input is UNDEFINED (X or U), the output will be X. If the fuse is blown, the output will be TRISTATE (Z).

See Also:

Serialized Form

Field Summary

(package private) static int[]	_active
protected static int	ACTIVE
protected ColoredPolyline	fuse
protected StdLogic1164	next_Y
protected static int	PASSIVE
protected PortStdLogic1164	port_A
protected PortStdLogic1164	port_Y
protected int	state

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

GalFuse()

Method Summary

void	elaborate(java.lang.Object arg) elaborate(): This method is called by the simulation engine to initialize the simulation object.
void	evaluate(java.lang.Object arg) calculate the StdLogic1164 negation of input A, schedule to Y after t_delay
boolean	initialize(java.lang.String s) initialize a GenericGate from a String that contains the integer version id of this gate and its propagation delay (in seconds), e.g.
void	mousePressed(java.awt.event.MouseEvent evt) react to a MouseEvent.
void	showState()
void	write(java.io.PrintWriter pw) write "versionId" and gate delay "t_delay"

Methods inherited from class hades.models.gates.GenericGate

configure, copy, getDelay, getToolTip, 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, 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

PASSIVE

protected static final int PASSIVE

See Also:

Constant Field Values

ACTIVE

protected static final int ACTIVE

See Also:

Constant Field Values

state

protected int state

fuse

protected ColoredPolyline fuse

port_A

protected PortStdLogic1164 port_A

port_Y

protected PortStdLogic1164 port_Y

next_Y

protected StdLogic1164 next_Y

_active

static final int[] _active

Constructor Detail

GalFuse

public GalFuse()

Method Detail

elaborate

public void elaborate(java.lang.Object arg)

Description copied from interface: Simulatable

elaborate(): This method is called by the simulation engine to initialize the simulation object.

Specified by:

elaborate in interface Simulatable

Overrides:

elaborate in class GenericGate

evaluate

public void evaluate(java.lang.Object arg)

calculate the StdLogic1164 negation of input A, schedule to Y after t_delay

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class SimObject

Parameters:

arg - an arbitrary object argument

mousePressed

public void mousePressed(java.awt.event.MouseEvent evt)

Description copied from class: SimObject

react to a MouseEvent. The base SimObject ignores MouseEvents.

Note that the HADES schematic editor will also deliver jfig.canvas.FigCanvasEvent object, which also include the world-coordinates of the Event.

Overrides:

mousePressed in class SimObject

write

public void write(java.io.PrintWriter pw)

Description copied from class: GenericGate

write "versionId" and gate delay "t_delay"

Overrides:

write in class GenericGate

initialize

public boolean initialize(java.lang.String s)

Description copied from class: GenericGate

initialize a GenericGate from a String that contains the integer version id of this gate and its propagation delay (in seconds), e.g. '1001 0.5E-8'.

Overrides:

initialize in class GenericGate

showState

public void showState()