| Line 43... |
Line 43... |
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//
|
//
|
`timescale 1ns / 1ps
|
`timescale 1ns / 1ps
|
`include "usbConstants_h.v"
|
`include "usbConstants_h.v"
|
|
|
module sendPacketCheckPreamble (clk, fullSpeedBitRate, fullSpeedPolarity, grabLineControl, preAmbleEnable, rst, sendPacketCPPID, sendPacketCPReady, sendPacketCPWEn, sendPacketPID, sendPacketRdy, sendPacketWEn);
|
module sendPacketCheckPreamble (clk, preAmbleEnable, rst, sendPacketCPPID, sendPacketCPReady, sendPacketCPWEn, sendPacketPID, sendPacketRdy, sendPacketWEn);
|
input clk;
|
input clk;
|
input preAmbleEnable;
|
input preAmbleEnable;
|
input rst;
|
input rst;
|
input [3:0]sendPacketCPPID;
|
input [3:0]sendPacketCPPID;
|
input sendPacketCPWEn;
|
input sendPacketCPWEn;
|
input sendPacketRdy;
|
input sendPacketRdy;
|
output fullSpeedBitRate;
|
|
output fullSpeedPolarity;
|
|
output grabLineControl; // mux select
|
|
output sendPacketCPReady;
|
output sendPacketCPReady;
|
output [3:0]sendPacketPID;
|
output [3:0]sendPacketPID;
|
output sendPacketWEn;
|
output sendPacketWEn;
|
|
|
wire clk;
|
wire clk;
|
reg fullSpeedBitRate, next_fullSpeedBitRate;
|
|
reg fullSpeedPolarity, next_fullSpeedPolarity;
|
|
reg grabLineControl, next_grabLineControl;
|
|
wire preAmbleEnable;
|
wire preAmbleEnable;
|
wire rst;
|
wire rst;
|
wire [3:0]sendPacketCPPID;
|
wire [3:0]sendPacketCPPID;
|
reg sendPacketCPReady, next_sendPacketCPReady;
|
reg sendPacketCPReady, next_sendPacketCPReady;
|
wire sendPacketCPWEn;
|
wire sendPacketCPWEn;
|
| Line 77... |
Line 71... |
`define SPC_WAIT_EN 4'b0000
|
`define SPC_WAIT_EN 4'b0000
|
`define START_SPC 4'b0001
|
`define START_SPC 4'b0001
|
`define CHK_PREAM 4'b0010
|
`define CHK_PREAM 4'b0010
|
`define PREAM_PKT_SND_PREAM 4'b0011
|
`define PREAM_PKT_SND_PREAM 4'b0011
|
`define PREAM_PKT_WAIT_RDY1 4'b0100
|
`define PREAM_PKT_WAIT_RDY1 4'b0100
|
`define PREAM_PKT_WAIT_RDY2 4'b0101
|
`define PREAM_PKT_PREAM_SENT 4'b0101
|
`define PREAM_PKT_SND_PID 4'b0110
|
`define PREAM_PKT_SND_PID 4'b0110
|
`define PREAM_PKT_WAIT_RDY3 4'b0111
|
`define PREAM_PKT_PID_SENT 4'b0111
|
`define REG_PKT_SEND_PID 4'b1000
|
`define REG_PKT_SEND_PID 4'b1000
|
`define REG_PKT_WAIT_RDY1 4'b1001
|
`define REG_PKT_WAIT_RDY1 4'b1001
|
`define REG_PKT_WAIT_RDY 4'b1010
|
`define REG_PKT_WAIT_RDY 4'b1010
|
`define READY 4'b1011
|
`define READY 4'b1011
|
|
`define PREAM_PKT_WAIT_RDY2 4'b1100
|
|
`define PREAM_PKT_WAIT_RDY3 4'b1101
|
|
|
reg [3:0]CurrState_sendPktCP, NextState_sendPktCP;
|
reg [3:0]CurrState_sendPktCP, NextState_sendPktCP;
|
|
|
|
|
// Machine: sendPktCP
|
// Machine: sendPktCP
|
|
|
// NextState logic (combinatorial)
|
// NextState logic (combinatorial)
|
always @ (sendPacketCPWEn or preAmbleEnable or sendPacketRdy or sendPacketCPPID or sendPacketCPReady or sendPacketWEn or sendPacketPID or fullSpeedBitRate or fullSpeedPolarity or grabLineControl or CurrState_sendPktCP)
|
always @ (sendPacketCPWEn or preAmbleEnable or sendPacketRdy or sendPacketCPPID or sendPacketCPReady or sendPacketWEn or sendPacketPID or CurrState_sendPktCP)
|
begin
|
begin
|
NextState_sendPktCP <= CurrState_sendPktCP;
|
NextState_sendPktCP <= CurrState_sendPktCP;
|
// Set default values for outputs and signals
|
// Set default values for outputs and signals
|
next_sendPacketCPReady <= sendPacketCPReady;
|
next_sendPacketCPReady <= sendPacketCPReady;
|
next_sendPacketWEn <= sendPacketWEn;
|
next_sendPacketWEn <= sendPacketWEn;
|
next_sendPacketPID <= sendPacketPID;
|
next_sendPacketPID <= sendPacketPID;
|
next_fullSpeedBitRate <= fullSpeedBitRate;
|
|
next_fullSpeedPolarity <= fullSpeedPolarity;
|
|
next_grabLineControl <= grabLineControl;
|
|
case (CurrState_sendPktCP) // synopsys parallel_case full_case
|
case (CurrState_sendPktCP) // synopsys parallel_case full_case
|
`SPC_WAIT_EN:
|
`SPC_WAIT_EN:
|
begin
|
begin
|
if (sendPacketCPWEn == 1'b1)
|
if (sendPacketCPWEn == 1'b1)
|
begin
|
begin
|
| Line 134... |
Line 127... |
end
|
end
|
`PREAM_PKT_SND_PREAM:
|
`PREAM_PKT_SND_PREAM:
|
begin
|
begin
|
next_sendPacketWEn <= 1'b1;
|
next_sendPacketWEn <= 1'b1;
|
next_sendPacketPID <= `PREAMBLE;
|
next_sendPacketPID <= `PREAMBLE;
|
NextState_sendPktCP <= `PREAM_PKT_WAIT_RDY2;
|
NextState_sendPktCP <= `PREAM_PKT_PREAM_SENT;
|
next_sendPacketWEn <= 1'b0;
|
|
end
|
end
|
`PREAM_PKT_WAIT_RDY1:
|
`PREAM_PKT_WAIT_RDY1:
|
begin
|
begin
|
if (sendPacketRdy == 1'b1)
|
if (sendPacketRdy == 1'b1)
|
begin
|
begin
|
NextState_sendPktCP <= `PREAM_PKT_SND_PREAM;
|
NextState_sendPktCP <= `PREAM_PKT_SND_PREAM;
|
next_fullSpeedBitRate <= 1'b1;
|
|
next_fullSpeedPolarity <= 1'b1;
|
|
next_grabLineControl <= 1'b1;
|
|
end
|
end
|
end
|
end
|
`PREAM_PKT_WAIT_RDY2:
|
`PREAM_PKT_PREAM_SENT:
|
begin
|
|
if (sendPacketRdy == 1'b1)
|
|
begin
|
begin
|
NextState_sendPktCP <= `PREAM_PKT_SND_PID;
|
next_sendPacketWEn <= 1'b0;
|
next_fullSpeedBitRate <= 1'b1;
|
NextState_sendPktCP <= `PREAM_PKT_WAIT_RDY2;
|
end
|
|
end
|
end
|
`PREAM_PKT_SND_PID:
|
`PREAM_PKT_SND_PID:
|
begin
|
begin
|
next_sendPacketWEn <= 1'b1;
|
next_sendPacketWEn <= 1'b1;
|
next_sendPacketPID <= sendPacketCPPID;
|
next_sendPacketPID <= sendPacketCPPID;
|
NextState_sendPktCP <= `PREAM_PKT_WAIT_RDY3;
|
NextState_sendPktCP <= `PREAM_PKT_PID_SENT;
|
|
end
|
|
`PREAM_PKT_PID_SENT:
|
|
begin
|
next_sendPacketWEn <= 1'b0;
|
next_sendPacketWEn <= 1'b0;
|
|
NextState_sendPktCP <= `PREAM_PKT_WAIT_RDY3;
|
|
end
|
|
`PREAM_PKT_WAIT_RDY2:
|
|
begin
|
|
if (sendPacketRdy == 1'b1)
|
|
begin
|
|
NextState_sendPktCP <= `PREAM_PKT_SND_PID;
|
|
end
|
end
|
end
|
`PREAM_PKT_WAIT_RDY3:
|
`PREAM_PKT_WAIT_RDY3:
|
begin
|
begin
|
if (sendPacketRdy == 1'b1)
|
if (sendPacketRdy == 1'b1)
|
begin
|
begin
|
NextState_sendPktCP <= `READY;
|
NextState_sendPktCP <= `READY;
|
next_grabLineControl <= 1'b0;
|
|
end
|
end
|
end
|
end
|
`REG_PKT_SEND_PID:
|
`REG_PKT_SEND_PID:
|
begin
|
begin
|
next_sendPacketWEn <= 1'b1;
|
next_sendPacketWEn <= 1'b1;
|
| Line 208... |
Line 204... |
if (rst)
|
if (rst)
|
begin
|
begin
|
sendPacketCPReady <= 1'b1;
|
sendPacketCPReady <= 1'b1;
|
sendPacketWEn <= 1'b0;
|
sendPacketWEn <= 1'b0;
|
sendPacketPID <= 4'b0;
|
sendPacketPID <= 4'b0;
|
fullSpeedBitRate <= 1'b0;
|
|
fullSpeedPolarity <= 1'b0;
|
|
grabLineControl <= 1'b0;
|
|
end
|
end
|
else
|
else
|
begin
|
begin
|
sendPacketCPReady <= next_sendPacketCPReady;
|
sendPacketCPReady <= next_sendPacketCPReady;
|
sendPacketWEn <= next_sendPacketWEn;
|
sendPacketWEn <= next_sendPacketWEn;
|
sendPacketPID <= next_sendPacketPID;
|
sendPacketPID <= next_sendPacketPID;
|
fullSpeedBitRate <= next_fullSpeedBitRate;
|
|
fullSpeedPolarity <= next_fullSpeedPolarity;
|
|
grabLineControl <= next_grabLineControl;
|
|
end
|
end
|
end
|
end
|
|
|
endmodule
|
endmodule
|
No newline at end of file
|
No newline at end of file
|
