| Line 41... |
Line 41... |
//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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//
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// CVS Revision History
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// CVS Revision History
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//
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//
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// $Log: not supported by cvs2svn $
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// $Log: not supported by cvs2svn $
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// Revision 1.4 2002/01/23 10:28:16 mohor
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// Link in the header changed.
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//
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// Revision 1.3 2001/10/19 08:43:51 mohor
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// Revision 1.3 2001/10/19 08:43:51 mohor
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// eth_timescale.v changed to timescale.v This is done because of the
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// eth_timescale.v changed to timescale.v This is done because of the
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// simulation of the few cores in a one joined project.
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// simulation of the few cores in a one joined project.
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//
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//
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// Revision 1.2 2001/09/11 14:17:00 mohor
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// Revision 1.2 2001/09/11 14:17:00 mohor
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| Line 160... |
Line 163... |
// Defining the next state
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// Defining the next state
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assign StartIPG = StateDefer & ~ExcessiveDefer & ~CarrierSense;
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assign StartIPG = StateDefer & ~ExcessiveDefer & ~CarrierSense;
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assign StartIdle = StateIPG & (Rule1 & NibCnt[6:0] >= IPGT | ~Rule1 & NibCnt[6:0] >= IPGR2);
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assign StartIdle = StateIPG & (Rule1 & NibCnt[6:0] >= IPGT | ~Rule1 & NibCnt[6:0] >= IPGR2);
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assign StartPreamble = StateIdle & TxStartFrm;
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assign StartPreamble = StateIdle & TxStartFrm & ~CarrierSense;
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assign StartData[0] = ~Collision & (StatePreamble & NibCntEq15 | StateData[1] & ~TxEndFrm);
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assign StartData[0] = ~Collision & (StatePreamble & NibCntEq15 | StateData[1] & ~TxEndFrm);
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assign StartData[1] = ~Collision & StateData[0] & ~TxUnderRun & ~MaxFrame;
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assign StartData[1] = ~Collision & StateData[0] & ~TxUnderRun & ~MaxFrame;
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assign StartPAD = ~Collision & StateData[1] & TxEndFrm & Pad & ~NibbleMinFl;
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assign StartPAD = ~Collision & StateData[1] & TxEndFrm & Pad & ~NibbleMinFl;
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assign StartFCS = ~Collision & StateData[1] & TxEndFrm & (~Pad & CrcEn | Pad & NibbleMinFl)
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assign StartFCS = ~Collision & StateData[1] & TxEndFrm & (~Pad | Pad & NibbleMinFl) & CrcEn
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| ~Collision & StatePAD & NibbleMinFl;
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| ~Collision & StatePAD & NibbleMinFl & CrcEn;
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assign StartJam = (Collision | UnderRun) & ((StatePreamble & NibCntEq15) | (|StateData[1:0]) | StatePAD | StateFCS);
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assign StartJam = (Collision | UnderRun) & ((StatePreamble & NibCntEq15) | (|StateData[1:0]) | StatePAD | StateFCS);
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assign StartBackoff = StateJam & ~RandomEq0 & ColWindow & ~RetryMax & NibCntEq7 & ~NoBckof;
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assign StartBackoff = StateJam & ~RandomEq0 & ColWindow & ~RetryMax & NibCntEq7 & ~NoBckof;
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assign StartDefer = StateIPG & ~Rule1 & CarrierSense & NibCnt[6:0] <= IPGR1 & NibCnt[6:0] != IPGR2
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assign StartDefer = StateIPG & ~Rule1 & CarrierSense & NibCnt[6:0] <= IPGR1 & NibCnt[6:0] != IPGR2
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| StateIdle & ~TxStartFrm & CarrierSense
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| StateIdle & CarrierSense
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| StateJam & NibCntEq7 & (NoBckof | RandomEq0 | ~ColWindow | RetryMax)
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| StateJam & NibCntEq7 & (NoBckof | RandomEq0 | ~ColWindow | RetryMax)
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| StateBackOff & (TxUnderRun | RandomEqByteCnt)
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| StateBackOff & (TxUnderRun | RandomEqByteCnt)
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| StartTxDone | TooBig;
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| StartTxDone | TooBig;
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