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Rev 221 → Rev 220

/trunk/rtl/verilog/eth_wishbone.v
41,11 → 41,6
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.39 2002/10/11 15:35:20 mohor
// txfifo_cnt and rxfifo_cnt counters width is defined in the eth_define.v file,
// TxDone and TxRetry are generated after the current WISHBONE access is
// finished.
//
// Revision 1.38 2002/10/10 16:29:30 mohor
// BIST added.
//
363,11 → 358,8
reg TxAbort_wb_q;
reg TxRetry_wb_q;
reg TxRetryPacket;
reg TxRetryPacket_NotCleared;
reg TxDonePacket;
reg TxDonePacket_NotCleared;
reg TxDonePulse_q;
reg TxAbortPacket;
reg TxAbortPacket_NotCleared;
reg RxBDReady;
reg RxReady;
reg TxBDReady;
630,7 → 622,7
 
 
// Reading the Tx buffer descriptor
assign StartTxBDRead = (TxRetryPacket_NotCleared | TxStatusWrite) & ~BlockingTxBDRead & ~TxBDReady;
assign StartTxBDRead = (TxRetry_wb | TxStatusWrite) & ~BlockingTxBDRead & ~TxBDReady;
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
663,7 → 655,7
 
 
// Writing status back to the Tx buffer descriptor
assign TxStatusWrite = (TxDonePacket_NotCleared | TxAbortPacket_NotCleared) & TxEn & TxEn_q & ~BlockingTxStatusWrite;
assign TxStatusWrite = (TxDone_wb | TxAbort_wb) & TxEn & TxEn_q & ~BlockingTxStatusWrite;
 
 
 
887,10 → 879,7
ReadTxDataFromMemory <=#Tp 1'b1;
end
 
reg BlockingLastReadOn_Abort_Retry;
 
wire ReadTxDataFromMemory_2 = ReadTxDataFromMemory & ~BlockReadTxDataFromMemory & ~BlockingLastReadOn_Abort_Retry;
 
wire ReadTxDataFromMemory_2 = ReadTxDataFromMemory & ~BlockReadTxDataFromMemory;
wire [31:0] TxData_wb;
wire ReadTxDataFromFifo_wb;
 
899,29 → 888,15
if(Reset)
BlockReadTxDataFromMemory <=#Tp 1'b0;
else
if((TxBufferAlmostFull | TxLength <= 4)& MasterWbTX & (!(TxAbortPacket | TxRetryPacket)))
if((TxBufferAlmostFull | TxLength <= 4)& MasterWbTX)
BlockReadTxDataFromMemory <=#Tp 1'b1;
else
if(ReadTxDataFromFifo_wb | TxDonePacket | TxAbortPacket | TxRetryPacket)
if(ReadTxDataFromFifo_wb | TxDonePulse_q | TxAbortPacket | TxRetryPacket)
BlockReadTxDataFromMemory <=#Tp 1'b0;
end
 
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
BlockingLastReadOn_Abort_Retry <=#Tp 1'b0;
else
if(TxAbortPacket | TxRetryPacket)
BlockingLastReadOn_Abort_Retry <=#Tp 1'b0;
else
if(((TxAbort_wb & !TxAbortPacket_NotCleared) | (TxRetry_wb & !TxRetryPacket_NotCleared)) & !TxBDReady)
BlockingLastReadOn_Abort_Retry <=#Tp 1'b1;
end
 
 
 
 
assign MasterAccessFinished = m_wb_ack_i | m_wb_err_i;
wire [`ETH_TX_FIFO_CNT_WIDTH-1:0] txfifo_cnt;
wire [`ETH_RX_FIFO_CNT_WIDTH-1:0] rxfifo_cnt;
1036,7 → 1011,6
MasterWbRX <=#Tp 1'b0;
m_wb_cyc_o <=#Tp 1'b0;
m_wb_stb_o <=#Tp 1'b0;
cyc_cleared<=#Tp 1'b0;
IncrTxPointer<=#Tp 1'b0;
end
default: // Don't touch
1154,7 → 1128,7
if(Reset)
TxEndFrm_wb <=#Tp 1'b0;
else
if(TxLengthEq0 & TxBufferAlmostEmpty & TxUsedData)
if(TxLengthLt4 & TxBufferAlmostEmpty & TxUsedData)
TxEndFrm_wb <=#Tp 1'b1;
else
if(TxRetryPulse | TxDonePulse | TxAbortPulse)
1280,6 → 1254,7
TxDone_wb_q <=#Tp 1'b0;
TxAbort_wb_q <=#Tp 1'b0;
TxRetry_wb_q <=#Tp 1'b0;
TxDonePulse_q <=#Tp 1'b0;
end
else
begin
1286,6 → 1261,7
TxDone_wb_q <=#Tp TxDone_wb;
TxAbort_wb_q <=#Tp TxAbort_wb;
TxRetry_wb_q <=#Tp TxRetry_wb;
TxDonePulse_q <=#Tp TxDonePulse;
end
end
 
1306,18 → 1282,6
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxAbortPacket_NotCleared <=#Tp 1'b0;
else
if(TxAbort_wb & (MasterWbTX & MasterAccessFinished | (!MasterWbTX)))
TxAbortPacket_NotCleared <=#Tp 1'b1;
else
TxAbortPacket_NotCleared <=#Tp 1'b0;
end
 
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxAbortPacketBlocked <=#Tp 1'b0;
else
if(TxAbortPacket)
1344,18 → 1308,6
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxRetryPacket_NotCleared <=#Tp 1'b0;
else
if(TxRetry_wb & (MasterWbTX & MasterAccessFinished | (!MasterWbTX)))
TxRetryPacket_NotCleared <=#Tp 1'b1;
else
TxRetryPacket_NotCleared <=#Tp 1'b0;
end
 
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxRetryPacketBlocked <=#Tp 1'b0;
else
if(TxRetryPacket)
1366,44 → 1318,6
end
 
 
reg TxDonePacketBlocked;
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxDonePacket <=#Tp 1'b0;
else
if(TxDone_wb & (!TxDonePacketBlocked) & (MasterWbTX & MasterAccessFinished | (!MasterWbTX)))
TxDonePacket <=#Tp 1'b1;
else
TxDonePacket <=#Tp 1'b0;
end
 
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxDonePacket_NotCleared <=#Tp 1'b0;
else
if(TxDone_wb & (MasterWbTX & MasterAccessFinished | (!MasterWbTX)))
TxDonePacket_NotCleared <=#Tp 1'b1;
else
TxDonePacket_NotCleared <=#Tp 1'b0;
end
 
 
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxDonePacketBlocked <=#Tp 1'b0;
else
if(TxDonePacket)
TxDonePacketBlocked <=#Tp 1'b1;
else
if(!TxDone_wb & TxDone_wb_q)
TxDonePacketBlocked <=#Tp 1'b0;
end
 
 
// Sinchronizing and evaluating tx data
//assign SetGotData = (TxStartFrm_wb | NewTxDataAvaliable_wb & ~TxAbort_wb & ~TxRetry_wb) & ~WB_CLK_I;
assign SetGotData = (TxStartFrm_wb);
2095,6 → 2009,7
assign WriteRxDataToMemory = ~RxBufferEmpty;
 
 
 
// Generation of the end-of-frame signal
always @ (posedge MRxClk or posedge Reset)
begin

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