| Line 90... |
Line 90... |
StartJam, StartBackoff, TxStartFrm, MTxClk, Reset, MinFL, MaxFL, HugEn,
|
StartJam, StartBackoff, TxStartFrm, MTxClk, Reset, MinFL, MaxFL, HugEn,
|
ExDfrEn, PacketFinished_q, DlyCrcEn, StateSFD, ByteCnt, NibCnt,
|
ExDfrEn, PacketFinished_q, DlyCrcEn, StateSFD, ByteCnt, NibCnt,
|
ExcessiveDefer, NibCntEq7, NibCntEq15, MaxFrame, NibbleMinFl, DlyCrcCnt
|
ExcessiveDefer, NibCntEq7, NibCntEq15, MaxFrame, NibbleMinFl, DlyCrcCnt
|
);
|
);
|
|
|
parameter Tp = 1;
|
|
|
|
input MTxClk; // Tx clock
|
input MTxClk; // Tx clock
|
input Reset; // Reset
|
input Reset; // Reset
|
input StatePreamble; // Preamble state
|
input StatePreamble; // Preamble state
|
input StateIPG; // IPG state
|
input StateIPG; // IPG state
|
input [1:0] StateData; // Data state
|
input [1:0] StateData; // Data state
|
| Line 150... |
Line 148... |
|
|
// Nibble Counter
|
// Nibble Counter
|
always @ (posedge MTxClk or posedge Reset)
|
always @ (posedge MTxClk or posedge Reset)
|
begin
|
begin
|
if(Reset)
|
if(Reset)
|
NibCnt <= #Tp 16'h0;
|
NibCnt <= 16'h0;
|
else
|
else
|
begin
|
begin
|
if(ResetNibCnt)
|
if(ResetNibCnt)
|
NibCnt <= #Tp 16'h0;
|
NibCnt <= 16'h0;
|
else
|
else
|
if(IncrementNibCnt)
|
if(IncrementNibCnt)
|
NibCnt <= #Tp NibCnt + 1'b1;
|
NibCnt <= NibCnt + 1'b1;
|
end
|
end
|
end
|
end
|
|
|
|
|
assign NibCntEq7 = &NibCnt[2:0];
|
assign NibCntEq7 = &NibCnt[2:0];
|
| Line 182... |
Line 180... |
|
|
// Transmit Byte Counter
|
// Transmit Byte Counter
|
always @ (posedge MTxClk or posedge Reset)
|
always @ (posedge MTxClk or posedge Reset)
|
begin
|
begin
|
if(Reset)
|
if(Reset)
|
ByteCnt[15:0] <= #Tp 16'h0;
|
ByteCnt[15:0] <= 16'h0;
|
else
|
else
|
begin
|
begin
|
if(ResetByteCnt)
|
if(ResetByteCnt)
|
ByteCnt[15:0] <= #Tp 16'h0;
|
ByteCnt[15:0] <= 16'h0;
|
else
|
else
|
if(IncrementByteCnt)
|
if(IncrementByteCnt)
|
ByteCnt[15:0] <= #Tp ByteCnt[15:0] + 1'b1;
|
ByteCnt[15:0] <= ByteCnt[15:0] + 1'b1;
|
end
|
end
|
end
|
end
|
|
|
|
|
assign MaxFrame = ByteCnt[15:0] == MaxFL[15:0] & ~HugEn;
|
assign MaxFrame = ByteCnt[15:0] == MaxFL[15:0] & ~HugEn;
|
| Line 203... |
Line 201... |
|
|
// Delayed CRC counter
|
// Delayed CRC counter
|
always @ (posedge MTxClk or posedge Reset)
|
always @ (posedge MTxClk or posedge Reset)
|
begin
|
begin
|
if(Reset)
|
if(Reset)
|
DlyCrcCnt <= #Tp 3'h0;
|
DlyCrcCnt <= 3'h0;
|
else
|
else
|
begin
|
begin
|
if(StateData[1] & DlyCrcCnt == 3'h4 | StartJam | PacketFinished_q)
|
if(StateData[1] & DlyCrcCnt == 3'h4 | StartJam | PacketFinished_q)
|
DlyCrcCnt <= #Tp 3'h0;
|
DlyCrcCnt <= 3'h0;
|
else
|
else
|
if(DlyCrcEn & (StateSFD | StateData[1] & (|DlyCrcCnt[2:0])))
|
if(DlyCrcEn & (StateSFD | StateData[1] & (|DlyCrcCnt[2:0])))
|
DlyCrcCnt <= #Tp DlyCrcCnt + 1'b1;
|
DlyCrcCnt <= DlyCrcCnt + 1'b1;
|
end
|
end
|
end
|
end
|
|
|
|
|
|
|
