byucc.jhdl.DRC.Rules
Class IOBufs

java.lang.Object
  byucc.jhdl.DRC.DesignRule
      byucc.jhdl.DRC.Rules.IOBufs

All Implemented Interfaces:

DesignRuleConstants

Direct Known Subclasses:

IOBufsVirtex, IOBufsXC4000

public abstract class IOBufs

extends DesignRule

This class implements a DesignRule. It checks all iobufs (and their variants) to make sure that they are driven only by iopads or nothing at all.

Author:

Anthony L. Slade

Field Summary

Fields inherited from class byucc.jhdl.DRC.DesignRule

cellList, checker, checkOk, description, enabled, failureReport, name, oneLineDescription, violatingCells

Fields inherited from interface byucc.jhdl.DRC.DesignRuleConstants

MSGHEADER_ERROR, MSGHEADER_NOTICE, MSGHEADER_STATUS, MSGHEADER_WARNING, MSGTYPE_ERR_ALL, MSGTYPE_ERR_EXPERTWARN, MSGTYPE_ERR_NOEXPERT, MSGTYPE_ERROR_BITS, MSGTYPE_MUTE, MSGTYPE_NOTICE, MSGTYPE_NOTICE_BITS, MSGTYPE_NOTICE_NOEXPERT, MSGTYPE_STATUS, MSGTYPE_STATUS_BITS, MSGTYPE_STATUS_NOEXPERT, MSGTYPE_WARN_ALL, MSGTYPE_WARN_NOEXPERT, MSGTYPE_WARNING_BITS, SHOW_NUM_RULES_CHECKED_EVERY

Constructor Summary

IOBufs()

Method Summary

boolean	doCheck() Initiates the design rule check on topCell.
abstract boolean	isIOBuf(Cell cl) Returns true if cl is an instance of a platform-specific iobuf-type cell.
protected boolean	isIOPad(Cell sourceCell)
protected void	sortCell(Cell cl) Sorts Cells according to type.

Methods inherited from class byucc.jhdl.DRC.DesignRule

addToCellList, addToCellList, addViolatingCell, checkOk, displayMsgHeader, getDescription, getDesignRuleChecker, getName, getOneLineDescription, getReport, getViolatingCells, msg, msg, msg, msg, msgln, msgln, registerViolation, resetState, setCurrentMsgType, setDesignRuleCheckerReference, setName, setReport, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IOBufs

public IOBufs()

Method Detail

doCheck

public boolean doCheck()

Initiates the design rule check on topCell. The design rules for IOBufs are checked by this method.

Specified by:

doCheck in class DesignRule

Returns:

true if the design rules for IOBufs are kept, otherwise false.

sortCell

protected void sortCell(Cell cl)

Sorts Cells according to type. ibufs and obufs and iobufs go into respective lists. This method overrides sortCell of the superclass because Virtex has iobufs and XC4000 doesn't.

Specified by:

sortCell in class DesignRule

Parameters:

cl - Cell to be sorted

isIOBuf

public abstract boolean isIOBuf(Cell cl)

Returns true if cl is an instance of a platform-specific iobuf-type cell.

Parameters:

cl - Cell to check its class to see if is an iobuf type

Returns:

true if cl is an iobuf-type cell, otherwise false

isIOPad

protected boolean isIOPad(Cell sourceCell)