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Line 88... |
module eth_rxstatem (MRxClk, Reset, MRxDV, ByteCntEq0, ByteCntGreat2, Transmitting, MRxDEq5, MRxDEqD,
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module eth_rxstatem (MRxClk, Reset, MRxDV, ByteCntEq0, ByteCntGreat2, Transmitting, MRxDEq5, MRxDEqD,
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IFGCounterEq24, ByteCntMaxFrame, StateData, StateIdle, StatePreamble, StateSFD,
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IFGCounterEq24, ByteCntMaxFrame, StateData, StateIdle, StatePreamble, StateSFD,
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StateDrop
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StateDrop
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);
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);
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parameter Tp = 1;
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input MRxClk;
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input MRxClk;
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input Reset;
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input Reset;
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input MRxDV;
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input MRxDV;
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input ByteCntEq0;
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input ByteCntEq0;
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input ByteCntGreat2;
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input ByteCntGreat2;
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Line 140... |
// Rx State Machine
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// Rx State Machine
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always @ (posedge MRxClk or posedge Reset)
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always @ (posedge MRxClk or posedge Reset)
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begin
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begin
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if(Reset)
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if(Reset)
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begin
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begin
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StateIdle <= #Tp 1'b0;
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StateIdle <= 1'b0;
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StateDrop <= #Tp 1'b1;
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StateDrop <= 1'b1;
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StatePreamble <= #Tp 1'b0;
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StatePreamble <= 1'b0;
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StateSFD <= #Tp 1'b0;
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StateSFD <= 1'b0;
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StateData0 <= #Tp 1'b0;
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StateData0 <= 1'b0;
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StateData1 <= #Tp 1'b0;
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StateData1 <= 1'b0;
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end
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end
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else
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else
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begin
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begin
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if(StartPreamble | StartSFD | StartDrop)
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if(StartPreamble | StartSFD | StartDrop)
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StateIdle <= #Tp 1'b0;
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StateIdle <= 1'b0;
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else
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else
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if(StartIdle)
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if(StartIdle)
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StateIdle <= #Tp 1'b1;
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StateIdle <= 1'b1;
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if(StartIdle)
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if(StartIdle)
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StateDrop <= #Tp 1'b0;
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StateDrop <= 1'b0;
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else
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else
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if(StartDrop)
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if(StartDrop)
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StateDrop <= #Tp 1'b1;
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StateDrop <= 1'b1;
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if(StartSFD | StartIdle | StartDrop)
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if(StartSFD | StartIdle | StartDrop)
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StatePreamble <= #Tp 1'b0;
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StatePreamble <= 1'b0;
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else
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else
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if(StartPreamble)
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if(StartPreamble)
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StatePreamble <= #Tp 1'b1;
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StatePreamble <= 1'b1;
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if(StartPreamble | StartIdle | StartData0 | StartDrop)
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if(StartPreamble | StartIdle | StartData0 | StartDrop)
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StateSFD <= #Tp 1'b0;
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StateSFD <= 1'b0;
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else
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else
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if(StartSFD)
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if(StartSFD)
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StateSFD <= #Tp 1'b1;
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StateSFD <= 1'b1;
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if(StartIdle | StartData1 | StartDrop)
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if(StartIdle | StartData1 | StartDrop)
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StateData0 <= #Tp 1'b0;
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StateData0 <= 1'b0;
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else
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else
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if(StartData0)
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if(StartData0)
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StateData0 <= #Tp 1'b1;
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StateData0 <= 1'b1;
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if(StartIdle | StartData0 | StartDrop)
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if(StartIdle | StartData0 | StartDrop)
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StateData1 <= #Tp 1'b0;
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StateData1 <= 1'b0;
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else
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else
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if(StartData1)
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if(StartData1)
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StateData1 <= #Tp 1'b1;
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StateData1 <= 1'b1;
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end
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end
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end
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end
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assign StateData[1:0] = {StateData1, StateData0};
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assign StateData[1:0] = {StateData1, StateData0};
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