|
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// SIETransmitter
|
//// SIETransmitter
|
//// ////
|
//// ////
|
//// This file is part of the usbhostslave opencores effort.
|
//// This file is part of the usbhostslave opencores effort.
|
//// http://www.opencores.org/cores/usbhostslave/ ////
|
//// http://www.opencores.org/cores/usbhostslave/ ////
|
//// ////
|
//// ////
|
//// Module Description: ////
|
//// Module Description: ////
|
////
|
////
|
//// ////
|
//// ////
|
//// To Do: ////
|
//// To Do: ////
|
////
|
////
|
//// ////
|
//// ////
|
//// Author(s): ////
|
//// Author(s): ////
|
//// - Steve Fielding, sfielding@base2designs.com ////
|
//// - Steve Fielding, sfielding@base2designs.com ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// Copyright (C) 2004 Steve Fielding and OPENCORES.ORG ////
|
//// Copyright (C) 2004 Steve Fielding and OPENCORES.ORG ////
|
//// ////
|
//// ////
|
//// This source file may be used and distributed without ////
|
//// This source file may be used and distributed without ////
|
//// restriction provided that this copyright statement is not ////
|
//// restriction provided that this copyright statement is not ////
|
//// removed from the file and that any derivative work contains ////
|
//// removed from the file and that any derivative work contains ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// ////
|
//// ////
|
//// This source file is free software; you can redistribute it ////
|
//// This source file is free software; you can redistribute it ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// later version. ////
|
//// later version. ////
|
//// ////
|
//// ////
|
//// This source is distributed in the hope that it will be ////
|
//// This source is distributed in the hope that it will be ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// details. ////
|
//// details. ////
|
//// ////
|
//// ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// Public License along with this source; if not, download it ////
|
//// Public License along with this source; if not, download it ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//
|
//
|
// $Id: SIETransmitter.v,v 1.2 2004-12-18 14:36:14 sfielding Exp $
|
// $Id: SIETransmitter.v,v 1.3 2004-12-31 14:40:43 sfielding Exp $
|
//
|
//
|
// CVS Revision History
|
// CVS Revision History
|
//
|
//
|
// $Log: not supported by cvs2svn $
|
// $Log: not supported by cvs2svn $
|
//
|
//
|
`timescale 1ns / 1ps
|
`timescale 1ns / 1ps
|
`include "usbSerialInterfaceEngine_h.v"
|
`include "usbSerialInterfaceEngine_h.v"
|
`include "usbConstants_h.v"
|
`include "usbConstants_h.v"
|
|
|
|
|
module SIETransmitter (clk, CRC16En, CRC16Result, CRC16UpdateRdy, CRC5_8Bit, CRC5En, CRC5Result, CRC5UpdateRdy, CRCData, JBit, KBit, processTxByteRdy, processTxByteWEn, rst, rstCRC, SIEPortCtrlIn, SIEPortDataIn, SIEPortTxRdy, SIEPortWEn, TxByteOut, TxByteOutCtrl, USBWireCtrl, USBWireData, USBWireGnt, USBWireRdy, USBWireReq, USBWireWEn);
|
module SIETransmitter (clk, CRC16En, CRC16Result, CRC16UpdateRdy, CRC5_8Bit, CRC5En, CRC5Result, CRC5UpdateRdy, CRCData, JBit, KBit, processTxByteRdy, processTxByteWEn, rst, rstCRC, SIEPortCtrlIn, SIEPortDataIn, SIEPortTxRdy, SIEPortWEn, TxByteOut, TxByteOutCtrl, USBWireCtrl, USBWireData, USBWireGnt, USBWireRdy, USBWireReq, USBWireWEn);
|
input clk;
|
input clk;
|
input [15:0]CRC16Result;
|
input [15:0]CRC16Result;
|
input CRC16UpdateRdy;
|
input CRC16UpdateRdy;
|
input [4:0]CRC5Result;
|
input [4:0]CRC5Result;
|
input CRC5UpdateRdy;
|
input CRC5UpdateRdy;
|
input [1:0]JBit;
|
input [1:0]JBit;
|
input [1:0]KBit;
|
input [1:0]KBit;
|
input processTxByteRdy;
|
input processTxByteRdy;
|
input rst;
|
input rst;
|
input [7:0]SIEPortCtrlIn;
|
input [7:0]SIEPortCtrlIn;
|
input [7:0]SIEPortDataIn;
|
input [7:0]SIEPortDataIn;
|
input SIEPortWEn;
|
input SIEPortWEn;
|
input USBWireGnt;
|
input USBWireGnt;
|
input USBWireRdy;
|
input USBWireRdy;
|
output CRC16En;
|
output CRC16En;
|
output CRC5_8Bit;
|
output CRC5_8Bit;
|
output CRC5En;
|
output CRC5En;
|
output [7:0]CRCData;
|
output [7:0]CRCData;
|
output processTxByteWEn;
|
output processTxByteWEn;
|
output rstCRC;
|
output rstCRC;
|
output SIEPortTxRdy;
|
output SIEPortTxRdy;
|
output [7:0]TxByteOut;
|
output [7:0]TxByteOut;
|
output [7:0]TxByteOutCtrl;
|
output [7:0]TxByteOutCtrl;
|
output USBWireCtrl;
|
output USBWireCtrl;
|
output [1:0]USBWireData;
|
output [1:0]USBWireData;
|
output USBWireReq;
|
output USBWireReq;
|
output USBWireWEn;
|
output USBWireWEn;
|
|
|
wire clk;
|
wire clk;
|
reg CRC16En, next_CRC16En;
|
reg CRC16En, next_CRC16En;
|
wire [15:0]CRC16Result;
|
wire [15:0]CRC16Result;
|
wire CRC16UpdateRdy;
|
wire CRC16UpdateRdy;
|
reg CRC5_8Bit, next_CRC5_8Bit;
|
reg CRC5_8Bit, next_CRC5_8Bit;
|
reg CRC5En, next_CRC5En;
|
reg CRC5En, next_CRC5En;
|
wire [4:0]CRC5Result;
|
wire [4:0]CRC5Result;
|
wire CRC5UpdateRdy;
|
wire CRC5UpdateRdy;
|
reg [7:0]CRCData, next_CRCData;
|
reg [7:0]CRCData, next_CRCData;
|
wire [1:0]JBit;
|
wire [1:0]JBit;
|
wire [1:0]KBit;
|
wire [1:0]KBit;
|
wire processTxByteRdy;
|
wire processTxByteRdy;
|
reg processTxByteWEn, next_processTxByteWEn;
|
reg processTxByteWEn, next_processTxByteWEn;
|
wire rst;
|
wire rst;
|
reg rstCRC, next_rstCRC;
|
reg rstCRC, next_rstCRC;
|
wire [7:0]SIEPortCtrlIn;
|
wire [7:0]SIEPortCtrlIn;
|
wire [7:0]SIEPortDataIn;
|
wire [7:0]SIEPortDataIn;
|
reg SIEPortTxRdy, next_SIEPortTxRdy;
|
reg SIEPortTxRdy, next_SIEPortTxRdy;
|
wire SIEPortWEn;
|
wire SIEPortWEn;
|
reg [7:0]TxByteOut, next_TxByteOut;
|
reg [7:0]TxByteOut, next_TxByteOut;
|
reg [7:0]TxByteOutCtrl, next_TxByteOutCtrl;
|
reg [7:0]TxByteOutCtrl, next_TxByteOutCtrl;
|
reg USBWireCtrl, next_USBWireCtrl;
|
reg USBWireCtrl, next_USBWireCtrl;
|
reg [1:0]USBWireData, next_USBWireData;
|
reg [1:0]USBWireData, next_USBWireData;
|
wire USBWireGnt;
|
wire USBWireGnt;
|
wire USBWireRdy;
|
wire USBWireRdy;
|
reg USBWireReq, next_USBWireReq;
|
reg USBWireReq, next_USBWireReq;
|
reg USBWireWEn, next_USBWireWEn;
|
reg USBWireWEn, next_USBWireWEn;
|
|
|
// diagram signals declarations
|
// diagram signals declarations
|
reg [4:0]i, next_i;
|
reg [4:0]i, next_i;
|
reg [7:0]SIEPortCtrl, next_SIEPortCtrl;
|
reg [7:0]SIEPortCtrl, next_SIEPortCtrl;
|
reg [7:0]SIEPortData, next_SIEPortData;
|
reg [7:0]SIEPortData, next_SIEPortData;
|
|
|
// BINARY ENCODED state machine: SIETx
|
// BINARY ENCODED state machine: SIETx
|
// State codes definitions:
|
// State codes definitions:
|
`define DIR_CTL_CHK_FIN 6'b000000
|
`define RES_ST_CHK_FIN 6'b000000
|
`define IDLE_CHK_FIN 6'b000001
|
`define IDLE_CHK_FIN 6'b000001
|
`define RES_ST_CHK_FIN 6'b000010
|
`define DIR_CTL_CHK_FIN 6'b000010
|
`define PKT_ST_CHK_PID 6'b000011
|
`define PKT_ST_CHK_PID 6'b000011
|
`define PKT_ST_DATA_DATA_CHK_STOP 6'b000100
|
`define PKT_ST_DATA_DATA_CHK_STOP 6'b000100
|
`define PKT_ST_HS_PKT_SENT 6'b000101
|
`define PKT_ST_SPCL_PKT_SENT 6'b000101
|
`define PKT_ST_TKN_CRC_PKT_SENT 6'b000110
|
`define PKT_ST_TKN_CRC_PKT_SENT 6'b000110
|
`define PKT_ST_DATA_DATA_PKT_SENT 6'b000111
|
`define PKT_ST_TKN_PID_PKT_SENT 6'b000111
|
`define PKT_ST_DATA_PID_PKT_SENT 6'b001000
|
`define PKT_ST_DATA_DATA_PKT_SENT 6'b001000
|
`define PKT_ST_SPCL_PKT_SENT 6'b001001
|
`define PKT_ST_DATA_PID_PKT_SENT 6'b001001
|
`define PKT_ST_TKN_PID_PKT_SENT 6'b001010
|
`define PKT_ST_HS_PKT_SENT 6'b001010
|
`define PKT_ST_DATA_CRC_PKT_SENT1 6'b001011
|
`define PKT_ST_DATA_CRC_PKT_SENT1 6'b001011
|
`define PKT_ST_TKN_BYTE1_PKT_SENT1 6'b001100
|
`define PKT_ST_TKN_BYTE1_PKT_SENT1 6'b001100
|
`define PKT_ST_DATA_CRC_PKT_SENT2 6'b001101
|
`define PKT_ST_DATA_CRC_PKT_SENT2 6'b001101
|
`define RES_ST_S1 6'b001110
|
`define RES_ST_S1 6'b001110
|
`define RES_ST_S3 6'b001111
|
`define RES_ST_S3 6'b001111
|
`define RES_ST_S4 6'b010000
|
`define RES_ST_S4 6'b010000
|
`define RES_ST_S5 6'b010001
|
`define RES_ST_S5 6'b010001
|
`define RES_ST_S6 6'b010010
|
`define RES_ST_S6 6'b010010
|
`define PKT_ST_SPCL_SEND_IDLE1 6'b010011
|
`define PKT_ST_SPCL_SEND_IDLE1 6'b010011
|
`define PKT_ST_SPCL_SEND_IDLE2 6'b010100
|
`define PKT_ST_SPCL_SEND_IDLE2 6'b010100
|
`define PKT_ST_SPCL_SEND_IDLE3 6'b010101
|
`define PKT_ST_SPCL_SEND_IDLE3 6'b010101
|
`define START_SIETX 6'b010110
|
`define START_SIETX 6'b010110
|
`define STX_CHK_ST 6'b010111
|
`define STX_CHK_ST 6'b010111
|
`define STX_WAIT_BYTE 6'b011000
|
`define STX_WAIT_BYTE 6'b011000
|
`define IDLE_STX_WAIT_GNT 6'b011001
|
`define IDLE_STX_WAIT_GNT 6'b011001
|
`define IDLE_STX_WAIT_RDY 6'b011010
|
`define IDLE_STX_WAIT_RDY 6'b011010
|
`define PKT_ST_TKN_CRC_UPD_CRC 6'b011011
|
`define PKT_ST_TKN_CRC_UPD_CRC 6'b011011
|
`define PKT_ST_TKN_BYTE1_UPD_CRC 6'b011100
|
`define PKT_ST_DATA_DATA_UPD_CRC 6'b011100
|
`define PKT_ST_DATA_DATA_UPD_CRC 6'b011101
|
`define PKT_ST_TKN_BYTE1_UPD_CRC 6'b011101
|
`define PKT_ST_TKN_CRC_WAIT_BYTE 6'b011110
|
`define PKT_ST_TKN_CRC_WAIT_BYTE 6'b011110
|
`define PKT_ST_TKN_BYTE1_WAIT_BYTE 6'b011111
|
`define PKT_ST_TKN_BYTE1_WAIT_BYTE 6'b011111
|
`define PKT_ST_DATA_DATA_WAIT_BYTE 6'b100000
|
`define PKT_ST_DATA_DATA_WAIT_BYTE 6'b100000
|
`define RES_ST_WAIT_GNT 6'b100001
|
`define DIR_CTL_WAIT_GNT 6'b100001
|
`define DIR_CTL_WAIT_GNT 6'b100010
|
`define RES_ST_WAIT_GNT 6'b100010
|
`define PKT_ST_TKN_BYTE1_WAIT_RDY 6'b100011
|
`define PKT_ST_HS_WAIT_RDY 6'b100011
|
`define PKT_ST_DATA_DATA_WAIT_RDY 6'b100100
|
`define PKT_ST_DATA_PID_WAIT_RDY 6'b100100
|
`define PKT_ST_TKN_CRC_WAIT_RDY 6'b100101
|
`define PKT_ST_SPCL_WAIT_RDY 6'b100101
|
`define PKT_ST_HS_WAIT_RDY 6'b100110
|
`define RES_ST_WAIT_RDY 6'b100110
|
`define RES_ST_WAIT_RDY 6'b100111
|
`define PKT_ST_DATA_DATA_WAIT_RDY 6'b100111
|
`define PKT_ST_TKN_PID_WAIT_RDY 6'b101000
|
`define PKT_ST_TKN_PID_WAIT_RDY 6'b101000
|
`define PKT_ST_DATA_PID_WAIT_RDY 6'b101001
|
`define PKT_ST_TKN_CRC_WAIT_RDY 6'b101001
|
`define PKT_ST_SPCL_WAIT_RDY 6'b101010
|
`define PKT_ST_TKN_BYTE1_WAIT_RDY 6'b101010
|
`define DIR_CTL_WAIT_RDY 6'b101011
|
`define DIR_CTL_WAIT_RDY 6'b101011
|
`define PKT_ST_DATA_CRC_WAIT_RDY1 6'b101100
|
`define PKT_ST_DATA_CRC_WAIT_RDY1 6'b101100
|
`define PKT_ST_DATA_CRC_WAIT_RDY2 6'b101101
|
`define PKT_ST_DATA_CRC_WAIT_RDY2 6'b101101
|
`define PKT_ST_WAIT_RDY_PKT 6'b101110
|
`define PKT_ST_WAIT_RDY_PKT 6'b101110
|
`define PKT_ST_SPCL_WAIT_WIRE 6'b101111
|
`define PKT_ST_SPCL_WAIT_WIRE 6'b101111
|
`define PKT_ST_WAIT_RDY_WIRE 6'b110000
|
`define PKT_ST_WAIT_RDY_WIRE 6'b110000
|
`define PKT_ST_WAIT_GNT 6'b110001
|
`define PKT_ST_WAIT_GNT 6'b110001
|
`define PKT_ST_TKN_CRC_WAIT_CRC_RDY 6'b110010
|
`define PKT_ST_TKN_CRC_WAIT_CRC_RDY 6'b110010
|
`define PKT_ST_DATA_DATA_WAIT_CRC_RDY 6'b110011
|
`define PKT_ST_DATA_DATA_WAIT_CRC_RDY 6'b110011
|
`define PKT_ST_TKN_BYTE1_WAIT_CRC_RDY 6'b110100
|
`define PKT_ST_TKN_BYTE1_WAIT_CRC_RDY 6'b110100
|
|
|
reg [5:0]CurrState_SIETx, NextState_SIETx;
|
reg [5:0]CurrState_SIETx, NextState_SIETx;
|
|
|
|
|
// Machine: SIETx
|
// Machine: SIETx
|
|
|
// NextState logic (combinatorial)
|
// NextState logic (combinatorial)
|
always @ (i or SIEPortData or SIEPortCtrl or USBWireRdy or JBit or SIEPortWEn or SIEPortDataIn or SIEPortCtrlIn or USBWireGnt or processTxByteRdy or CRC5Result or KBit or CRC16Result or CRC5UpdateRdy or CRC16UpdateRdy or USBWireWEn or USBWireReq or processTxByteWEn or rstCRC or USBWireData or USBWireCtrl or TxByteOut or TxByteOutCtrl or CRCData or CRC5En or CRC5_8Bit or CRC16En or SIEPortTxRdy or CurrState_SIETx)
|
always @ (i or SIEPortData or SIEPortCtrl or USBWireRdy or JBit or SIEPortWEn or SIEPortDataIn or SIEPortCtrlIn or USBWireGnt or processTxByteRdy or KBit or CRC5Result or CRC16Result or CRC5UpdateRdy or CRC16UpdateRdy or USBWireWEn or USBWireReq or processTxByteWEn or rstCRC or USBWireData or USBWireCtrl or TxByteOut or TxByteOutCtrl or CRCData or CRC5En or CRC5_8Bit or CRC16En or SIEPortTxRdy or CurrState_SIETx)
|
begin
|
begin
|
NextState_SIETx <= CurrState_SIETx;
|
NextState_SIETx <= CurrState_SIETx;
|
// Set default values for outputs and signals
|
// Set default values for outputs and signals
|
next_USBWireWEn <= USBWireWEn;
|
next_USBWireWEn <= USBWireWEn;
|
next_i <= i;
|
next_i <= i;
|
next_USBWireReq <= USBWireReq;
|
next_USBWireReq <= USBWireReq;
|
next_processTxByteWEn <= processTxByteWEn;
|
next_processTxByteWEn <= processTxByteWEn;
|
next_rstCRC <= rstCRC;
|
next_rstCRC <= rstCRC;
|
next_USBWireData <= USBWireData;
|
next_USBWireData <= USBWireData;
|
next_USBWireCtrl <= USBWireCtrl;
|
next_USBWireCtrl <= USBWireCtrl;
|
next_TxByteOut <= TxByteOut;
|
next_TxByteOut <= TxByteOut;
|
next_TxByteOutCtrl <= TxByteOutCtrl;
|
next_TxByteOutCtrl <= TxByteOutCtrl;
|
next_CRCData <= CRCData;
|
next_CRCData <= CRCData;
|
next_CRC5En <= CRC5En;
|
next_CRC5En <= CRC5En;
|
next_CRC5_8Bit <= CRC5_8Bit;
|
next_CRC5_8Bit <= CRC5_8Bit;
|
next_CRC16En <= CRC16En;
|
next_CRC16En <= CRC16En;
|
next_SIEPortTxRdy <= SIEPortTxRdy;
|
next_SIEPortTxRdy <= SIEPortTxRdy;
|
next_SIEPortData <= SIEPortData;
|
next_SIEPortData <= SIEPortData;
|
next_SIEPortCtrl <= SIEPortCtrl;
|
next_SIEPortCtrl <= SIEPortCtrl;
|
case (CurrState_SIETx) // synopsys parallel_case full_case
|
case (CurrState_SIETx) // synopsys parallel_case full_case
|
`START_SIETX:
|
`START_SIETX:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
next_TxByteOut <= 8'h00;
|
next_TxByteOut <= 8'h00;
|
next_TxByteOutCtrl <= 8'h00;
|
next_TxByteOutCtrl <= 8'h00;
|
next_USBWireData <= 2'b00;
|
next_USBWireData <= 2'b00;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireReq <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_rstCRC <= 1'b0;
|
next_rstCRC <= 1'b0;
|
next_CRCData <= 8'h00;
|
next_CRCData <= 8'h00;
|
next_CRC5En <= 1'b0;
|
next_CRC5En <= 1'b0;
|
next_CRC5_8Bit <= 1'b0;
|
next_CRC5_8Bit <= 1'b0;
|
next_CRC16En <= 1'b0;
|
next_CRC16En <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortData <= 8'h00;
|
next_SIEPortData <= 8'h00;
|
next_SIEPortCtrl <= 8'h00;
|
next_SIEPortCtrl <= 8'h00;
|
next_i <= 5'h0;
|
next_i <= 5'h0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`STX_CHK_ST:
|
`STX_CHK_ST:
|
begin
|
begin
|
if (SIEPortCtrl == `TX_PACKET_START)
|
if (SIEPortCtrl == `TX_PACKET_START)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_WAIT_GNT;
|
NextState_SIETx <= `PKT_ST_WAIT_GNT;
|
next_USBWireReq <= 1'b1;
|
next_USBWireReq <= 1'b1;
|
end
|
end
|
else if (SIEPortCtrl == `TX_DIRECT_CONTROL)
|
else if (SIEPortCtrl == `TX_IDLE)
|
begin
|
begin
|
NextState_SIETx <= `DIR_CTL_WAIT_GNT;
|
NextState_SIETx <= `IDLE_STX_WAIT_GNT;
|
next_USBWireReq <= 1'b1;
|
next_USBWireReq <= 1'b1;
|
end
|
end
|
else if (SIEPortCtrl == `TX_IDLE)
|
else if (SIEPortCtrl == `TX_DIRECT_CONTROL)
|
begin
|
begin
|
NextState_SIETx <= `IDLE_STX_WAIT_GNT;
|
NextState_SIETx <= `DIR_CTL_WAIT_GNT;
|
next_USBWireReq <= 1'b1;
|
next_USBWireReq <= 1'b1;
|
end
|
end
|
else if (SIEPortCtrl == `TX_RESUME_START)
|
else if (SIEPortCtrl == `TX_RESUME_START)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_WAIT_GNT;
|
NextState_SIETx <= `RES_ST_WAIT_GNT;
|
next_USBWireReq <= 1'b1;
|
next_USBWireReq <= 1'b1;
|
next_i <= 5'h0;
|
next_i <= 5'h0;
|
end
|
end
|
end
|
end
|
`STX_WAIT_BYTE:
|
`STX_WAIT_BYTE:
|
begin
|
begin
|
next_SIEPortTxRdy <= 1'b1;
|
next_SIEPortTxRdy <= 1'b1;
|
if (SIEPortWEn == 1'b1)
|
if (SIEPortWEn == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `STX_CHK_ST;
|
NextState_SIETx <= `STX_CHK_ST;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
end
|
end
|
end
|
end
|
`DIR_CTL_CHK_FIN:
|
`DIR_CTL_CHK_FIN:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_i <= i + 1'b1;
|
next_i <= i + 1'b1;
|
if (i == 5'h7)
|
if (i == 5'h7)
|
begin
|
begin
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
next_USBWireReq <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
NextState_SIETx <= `DIR_CTL_WAIT_RDY;
|
NextState_SIETx <= `DIR_CTL_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`DIR_CTL_WAIT_GNT:
|
`DIR_CTL_WAIT_GNT:
|
begin
|
begin
|
next_i <= 5'h0;
|
next_i <= 5'h0;
|
if (USBWireGnt == 1'b1)
|
if (USBWireGnt == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `DIR_CTL_WAIT_RDY;
|
NextState_SIETx <= `DIR_CTL_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`DIR_CTL_WAIT_RDY:
|
`DIR_CTL_WAIT_RDY:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `DIR_CTL_CHK_FIN;
|
NextState_SIETx <= `DIR_CTL_CHK_FIN;
|
next_USBWireData <= SIEPortData[1:0];
|
next_USBWireData <= SIEPortData[1:0];
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`IDLE_CHK_FIN:
|
`IDLE_CHK_FIN:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_i <= i + 1'b1;
|
next_i <= i + 1'b1;
|
if (i == 5'h7)
|
if (i == 5'h7)
|
begin
|
begin
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
next_USBWireReq <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
NextState_SIETx <= `IDLE_STX_WAIT_RDY;
|
NextState_SIETx <= `IDLE_STX_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`IDLE_STX_WAIT_GNT:
|
`IDLE_STX_WAIT_GNT:
|
begin
|
begin
|
next_i <= 5'h0;
|
next_i <= 5'h0;
|
if (USBWireGnt == 1'b1)
|
if (USBWireGnt == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `IDLE_STX_WAIT_RDY;
|
NextState_SIETx <= `IDLE_STX_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`IDLE_STX_WAIT_RDY:
|
`IDLE_STX_WAIT_RDY:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `IDLE_CHK_FIN;
|
NextState_SIETx <= `IDLE_CHK_FIN;
|
next_USBWireData <= 2'b00;
|
next_USBWireData <= 2'b00;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_CHK_PID:
|
`PKT_ST_CHK_PID:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
if (SIEPortData[1:0] == `TOKEN)
|
if (SIEPortData[1:0] == `HANDSHAKE)
|
begin
|
|
NextState_SIETx <= `PKT_ST_TKN_PID_WAIT_RDY;
|
|
end
|
|
else if (SIEPortData[1:0] == `HANDSHAKE)
|
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_HS_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_HS_WAIT_RDY;
|
end
|
end
|
else if (SIEPortData[1:0] == `DATA)
|
else if (SIEPortData[1:0] == `TOKEN)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_PID_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_TKN_PID_WAIT_RDY;
|
end
|
end
|
else if (SIEPortData[1:0] == `SPECIAL)
|
else if (SIEPortData[1:0] == `SPECIAL)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_SPCL_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_SPCL_WAIT_RDY;
|
end
|
end
|
|
else if (SIEPortData[1:0] == `DATA)
|
|
begin
|
|
NextState_SIETx <= `PKT_ST_DATA_PID_WAIT_RDY;
|
|
end
|
end
|
end
|
`PKT_ST_WAIT_RDY_PKT:
|
`PKT_ST_WAIT_RDY_PKT:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_CHK_PID;
|
NextState_SIETx <= `PKT_ST_CHK_PID;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= `SYNC_BYTE;
|
next_TxByteOut <= `SYNC_BYTE;
|
next_TxByteOutCtrl <= `DATA_START;
|
next_TxByteOutCtrl <= `DATA_START;
|
end
|
end
|
end
|
end
|
`PKT_ST_WAIT_RDY_WIRE:
|
`PKT_ST_WAIT_RDY_WIRE:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_WAIT_RDY_PKT;
|
NextState_SIETx <= `PKT_ST_WAIT_RDY_PKT;
|
//actively drive the first J bit
|
//actively drive the first J bit
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_WAIT_GNT:
|
`PKT_ST_WAIT_GNT:
|
begin
|
begin
|
if (USBWireGnt == 1'b1)
|
if (USBWireGnt == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_WAIT_RDY_WIRE;
|
NextState_SIETx <= `PKT_ST_WAIT_RDY_WIRE;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_CRC_PKT_SENT1:
|
`PKT_ST_DATA_CRC_PKT_SENT1:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `PKT_ST_DATA_CRC_WAIT_RDY2;
|
NextState_SIETx <= `PKT_ST_DATA_CRC_WAIT_RDY2;
|
end
|
end
|
`PKT_ST_DATA_CRC_PKT_SENT2:
|
`PKT_ST_DATA_CRC_PKT_SENT2:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_DATA_CRC_WAIT_RDY1:
|
`PKT_ST_DATA_CRC_WAIT_RDY1:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_CRC_PKT_SENT1;
|
NextState_SIETx <= `PKT_ST_DATA_CRC_PKT_SENT1;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= ~CRC16Result[7:0];
|
next_TxByteOut <= ~CRC16Result[7:0];
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_CRC_WAIT_RDY2:
|
`PKT_ST_DATA_CRC_WAIT_RDY2:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_CRC_PKT_SENT2;
|
NextState_SIETx <= `PKT_ST_DATA_CRC_PKT_SENT2;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= ~CRC16Result[15:8];
|
next_TxByteOut <= ~CRC16Result[15:8];
|
next_TxByteOutCtrl <= `DATA_STOP;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_DATA_CHK_STOP:
|
`PKT_ST_DATA_DATA_CHK_STOP:
|
begin
|
begin
|
if (SIEPortCtrl == `TX_PACKET_STOP)
|
if (SIEPortCtrl == `TX_PACKET_STOP)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_CRC_WAIT_RDY1;
|
NextState_SIETx <= `PKT_ST_DATA_CRC_WAIT_RDY1;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_CRC_RDY;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_CRC_RDY;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_DATA_PKT_SENT:
|
`PKT_ST_DATA_DATA_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_BYTE;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_DATA_DATA_UPD_CRC:
|
`PKT_ST_DATA_DATA_UPD_CRC:
|
begin
|
begin
|
next_CRCData <= SIEPortData;
|
next_CRCData <= SIEPortData;
|
next_CRC16En <= 1'b1;
|
next_CRC16En <= 1'b1;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_RDY;
|
end
|
end
|
`PKT_ST_DATA_DATA_WAIT_BYTE:
|
`PKT_ST_DATA_DATA_WAIT_BYTE:
|
begin
|
begin
|
next_SIEPortTxRdy <= 1'b1;
|
next_SIEPortTxRdy <= 1'b1;
|
if (SIEPortWEn == 1'b1)
|
if (SIEPortWEn == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_DATA_CHK_STOP;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_CHK_STOP;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_DATA_WAIT_RDY:
|
`PKT_ST_DATA_DATA_WAIT_RDY:
|
begin
|
begin
|
next_CRC16En <= 1'b0;
|
next_CRC16En <= 1'b0;
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_DATA_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_DATA_WAIT_CRC_RDY:
|
`PKT_ST_DATA_DATA_WAIT_CRC_RDY:
|
begin
|
begin
|
if (CRC16UpdateRdy == 1'b1)
|
if (CRC16UpdateRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_DATA_UPD_CRC;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_UPD_CRC;
|
end
|
end
|
end
|
end
|
`PKT_ST_DATA_PID_PKT_SENT:
|
`PKT_ST_DATA_PID_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
next_rstCRC <= 1'b0;
|
next_rstCRC <= 1'b0;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_BYTE;
|
NextState_SIETx <= `PKT_ST_DATA_DATA_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_DATA_PID_WAIT_RDY:
|
`PKT_ST_DATA_PID_WAIT_RDY:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_DATA_PID_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_DATA_PID_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_rstCRC <= 1'b1;
|
next_rstCRC <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_HS_PKT_SENT:
|
`PKT_ST_HS_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_HS_WAIT_RDY:
|
`PKT_ST_HS_WAIT_RDY:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_HS_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_HS_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
end
|
end
|
end
|
end
|
`PKT_ST_SPCL_PKT_SENT:
|
`PKT_ST_SPCL_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `PKT_ST_SPCL_WAIT_WIRE;
|
NextState_SIETx <= `PKT_ST_SPCL_WAIT_WIRE;
|
end
|
end
|
`PKT_ST_SPCL_SEND_IDLE1:
|
`PKT_ST_SPCL_SEND_IDLE1:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE2;
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE2;
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_SPCL_SEND_IDLE2:
|
`PKT_ST_SPCL_SEND_IDLE2:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE3;
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE3;
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_SPCL_SEND_IDLE3:
|
`PKT_ST_SPCL_SEND_IDLE3:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_SPCL_WAIT_RDY:
|
`PKT_ST_SPCL_WAIT_RDY:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_SPCL_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_SPCL_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
end
|
end
|
end
|
end
|
`PKT_ST_SPCL_WAIT_WIRE:
|
`PKT_ST_SPCL_WAIT_WIRE:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE1;
|
NextState_SIETx <= `PKT_ST_SPCL_SEND_IDLE1;
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_BYTE1_PKT_SENT1:
|
`PKT_ST_TKN_BYTE1_PKT_SENT1:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_BYTE;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_TKN_BYTE1_UPD_CRC:
|
`PKT_ST_TKN_BYTE1_UPD_CRC:
|
begin
|
begin
|
next_CRCData <= SIEPortData;
|
next_CRCData <= SIEPortData;
|
next_CRC5_8Bit <= 1'b1;
|
next_CRC5_8Bit <= 1'b1;
|
next_CRC5En <= 1'b1;
|
next_CRC5En <= 1'b1;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_RDY;
|
end
|
end
|
`PKT_ST_TKN_BYTE1_WAIT_BYTE:
|
`PKT_ST_TKN_BYTE1_WAIT_BYTE:
|
begin
|
begin
|
next_SIEPortTxRdy <= 1'b1;
|
next_SIEPortTxRdy <= 1'b1;
|
if (SIEPortWEn == 1'b1)
|
if (SIEPortWEn == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_CRC_RDY;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_CRC_RDY;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_BYTE1_WAIT_RDY:
|
`PKT_ST_TKN_BYTE1_WAIT_RDY:
|
begin
|
begin
|
next_CRC5En <= 1'b0;
|
next_CRC5En <= 1'b0;
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_PKT_SENT1;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_PKT_SENT1;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_BYTE1_WAIT_CRC_RDY:
|
`PKT_ST_TKN_BYTE1_WAIT_CRC_RDY:
|
begin
|
begin
|
if (CRC5UpdateRdy == 1'b1)
|
if (CRC5UpdateRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_UPD_CRC;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_UPD_CRC;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_CRC_PKT_SENT:
|
`PKT_ST_TKN_CRC_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_TKN_CRC_UPD_CRC:
|
`PKT_ST_TKN_CRC_UPD_CRC:
|
begin
|
begin
|
next_CRCData <= SIEPortData;
|
next_CRCData <= SIEPortData;
|
next_CRC5_8Bit <= 1'b0;
|
next_CRC5_8Bit <= 1'b0;
|
next_CRC5En <= 1'b1;
|
next_CRC5En <= 1'b1;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_RDY;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_RDY;
|
end
|
end
|
`PKT_ST_TKN_CRC_WAIT_BYTE:
|
`PKT_ST_TKN_CRC_WAIT_BYTE:
|
begin
|
begin
|
next_SIEPortTxRdy <= 1'b1;
|
next_SIEPortTxRdy <= 1'b1;
|
if (SIEPortWEn == 1'b1)
|
if (SIEPortWEn == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_CRC_RDY;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_WAIT_CRC_RDY;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortData <= SIEPortDataIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortCtrl <= SIEPortCtrlIn;
|
next_SIEPortTxRdy <= 1'b0;
|
next_SIEPortTxRdy <= 1'b0;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_CRC_WAIT_RDY:
|
`PKT_ST_TKN_CRC_WAIT_RDY:
|
begin
|
begin
|
next_CRC5En <= 1'b0;
|
next_CRC5En <= 1'b0;
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_CRC_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= {~CRC5Result, SIEPortData[2:0] };
|
next_TxByteOut <= {~CRC5Result, SIEPortData[2:0] };
|
next_TxByteOutCtrl <= `DATA_STOP;
|
next_TxByteOutCtrl <= `DATA_STOP;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_CRC_WAIT_CRC_RDY:
|
`PKT_ST_TKN_CRC_WAIT_CRC_RDY:
|
begin
|
begin
|
if (CRC5UpdateRdy == 1'b1)
|
if (CRC5UpdateRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_CRC_UPD_CRC;
|
NextState_SIETx <= `PKT_ST_TKN_CRC_UPD_CRC;
|
end
|
end
|
end
|
end
|
`PKT_ST_TKN_PID_PKT_SENT:
|
`PKT_ST_TKN_PID_PKT_SENT:
|
begin
|
begin
|
next_processTxByteWEn <= 1'b0;
|
next_processTxByteWEn <= 1'b0;
|
next_rstCRC <= 1'b0;
|
next_rstCRC <= 1'b0;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_BYTE;
|
NextState_SIETx <= `PKT_ST_TKN_BYTE1_WAIT_BYTE;
|
end
|
end
|
`PKT_ST_TKN_PID_WAIT_RDY:
|
`PKT_ST_TKN_PID_WAIT_RDY:
|
begin
|
begin
|
if (processTxByteRdy == 1'b1)
|
if (processTxByteRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `PKT_ST_TKN_PID_PKT_SENT;
|
NextState_SIETx <= `PKT_ST_TKN_PID_PKT_SENT;
|
next_processTxByteWEn <= 1'b1;
|
next_processTxByteWEn <= 1'b1;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOut <= SIEPortData;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_TxByteOutCtrl <= `DATA_STREAM;
|
next_rstCRC <= 1'b1;
|
next_rstCRC <= 1'b1;
|
end
|
end
|
end
|
end
|
`RES_ST_CHK_FIN:
|
`RES_ST_CHK_FIN:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (i == `RESUME_LEN)
|
if (i == `RESUME_LEN)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_S1;
|
NextState_SIETx <= `RES_ST_S1;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_WAIT_RDY;
|
NextState_SIETx <= `RES_ST_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`RES_ST_S1:
|
`RES_ST_S1:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_S3;
|
NextState_SIETx <= `RES_ST_S3;
|
next_USBWireData <= `SE0;
|
next_USBWireData <= `SE0;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`RES_ST_S3:
|
`RES_ST_S3:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_S4;
|
NextState_SIETx <= `RES_ST_S4;
|
next_USBWireData <= `SE0;
|
next_USBWireData <= `SE0;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`RES_ST_S4:
|
`RES_ST_S4:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_S5;
|
NextState_SIETx <= `RES_ST_S5;
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`RES_ST_S5:
|
`RES_ST_S5:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_S6;
|
NextState_SIETx <= `RES_ST_S6;
|
next_USBWireData <= JBit;
|
next_USBWireData <= JBit;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireCtrl <= `TRI_STATE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
end
|
end
|
end
|
end
|
`RES_ST_S6:
|
`RES_ST_S6:
|
begin
|
begin
|
next_USBWireWEn <= 1'b0;
|
next_USBWireWEn <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
next_USBWireReq <= 1'b0;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
NextState_SIETx <= `STX_WAIT_BYTE;
|
end
|
end
|
`RES_ST_WAIT_GNT:
|
`RES_ST_WAIT_GNT:
|
begin
|
begin
|
if (USBWireGnt == 1'b1)
|
if (USBWireGnt == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_WAIT_RDY;
|
NextState_SIETx <= `RES_ST_WAIT_RDY;
|
end
|
end
|
end
|
end
|
`RES_ST_WAIT_RDY:
|
`RES_ST_WAIT_RDY:
|
begin
|
begin
|
if (USBWireRdy == 1'b1)
|
if (USBWireRdy == 1'b1)
|
begin
|
begin
|
NextState_SIETx <= `RES_ST_CHK_FIN;
|
NextState_SIETx <= `RES_ST_CHK_FIN;
|
next_USBWireData <= KBit;
|
next_USBWireData <= KBit;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireCtrl <= `DRIVE;
|
next_USBWireWEn <= 1'b1;
|
next_USBWireWEn <= 1'b1;
|
next_i <= i + 1'b1;
|
next_i <= i + 1'b1;
|
end
|
end
|
end
|
end
|
endcase
|
endcase
|
end
|
end
|
|
|
// Current State Logic (sequential)
|
// Current State Logic (sequential)
|
always @ (posedge clk)
|
always @ (posedge clk)
|
begin
|
begin
|
if (rst)
|
if (rst)
|
CurrState_SIETx <= `START_SIETX;
|
CurrState_SIETx <= `START_SIETX;
|
else
|
else
|
CurrState_SIETx <= NextState_SIETx;
|
CurrState_SIETx <= NextState_SIETx;
|
end
|
end
|
|
|
// Registered outputs logic
|
// Registered outputs logic
|
always @ (posedge clk)
|
always @ (posedge clk)
|
begin
|
begin
|
if (rst)
|
if (rst)
|
begin
|
begin
|
USBWireWEn <= 1'b0;
|
USBWireWEn <= 1'b0;
|
USBWireReq <= 1'b0;
|
USBWireReq <= 1'b0;
|
processTxByteWEn <= 1'b0;
|
processTxByteWEn <= 1'b0;
|
rstCRC <= 1'b0;
|
rstCRC <= 1'b0;
|
USBWireData <= 2'b00;
|
USBWireData <= 2'b00;
|
USBWireCtrl <= `TRI_STATE;
|
USBWireCtrl <= `TRI_STATE;
|
TxByteOut <= 8'h00;
|
TxByteOut <= 8'h00;
|
TxByteOutCtrl <= 8'h00;
|
TxByteOutCtrl <= 8'h00;
|
CRCData <= 8'h00;
|
CRCData <= 8'h00;
|
CRC5En <= 1'b0;
|
CRC5En <= 1'b0;
|
CRC5_8Bit <= 1'b0;
|
CRC5_8Bit <= 1'b0;
|
CRC16En <= 1'b0;
|
CRC16En <= 1'b0;
|
SIEPortTxRdy <= 1'b0;
|
SIEPortTxRdy <= 1'b0;
|
i <= 5'h0;
|
i <= 5'h0;
|
SIEPortData <= 8'h00;
|
SIEPortData <= 8'h00;
|
SIEPortCtrl <= 8'h00;
|
SIEPortCtrl <= 8'h00;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
USBWireWEn <= next_USBWireWEn;
|
USBWireWEn <= next_USBWireWEn;
|
USBWireReq <= next_USBWireReq;
|
USBWireReq <= next_USBWireReq;
|
processTxByteWEn <= next_processTxByteWEn;
|
processTxByteWEn <= next_processTxByteWEn;
|
rstCRC <= next_rstCRC;
|
rstCRC <= next_rstCRC;
|
USBWireData <= next_USBWireData;
|
USBWireData <= next_USBWireData;
|
USBWireCtrl <= next_USBWireCtrl;
|
USBWireCtrl <= next_USBWireCtrl;
|
TxByteOut <= next_TxByteOut;
|
TxByteOut <= next_TxByteOut;
|
TxByteOutCtrl <= next_TxByteOutCtrl;
|
TxByteOutCtrl <= next_TxByteOutCtrl;
|
CRCData <= next_CRCData;
|
CRCData <= next_CRCData;
|
CRC5En <= next_CRC5En;
|
CRC5En <= next_CRC5En;
|
CRC5_8Bit <= next_CRC5_8Bit;
|
CRC5_8Bit <= next_CRC5_8Bit;
|
CRC16En <= next_CRC16En;
|
CRC16En <= next_CRC16En;
|
SIEPortTxRdy <= next_SIEPortTxRdy;
|
SIEPortTxRdy <= next_SIEPortTxRdy;
|
i <= next_i;
|
i <= next_i;
|
SIEPortData <= next_SIEPortData;
|
SIEPortData <= next_SIEPortData;
|
SIEPortCtrl <= next_SIEPortCtrl;
|
SIEPortCtrl <= next_SIEPortCtrl;
|
end
|
end
|
end
|
end
|
|
|
|
|
