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/dbg_comm_vpi.v
0,0 → 1,162
//////////////////////////////////////////////////////////////////////
//// ////
//// dbg_comm_vpi.v ////
//// ////
//// ////
//// This file is part of the SoC/OpenRISC Development Interface ////
//// http://www.opencores.org/cores/DebugInterface/ ////
//// ////
//// ////
//// Author(s): ////
//// Igor Mohor (igorm@opencores.org) ////
//// Gyorgy Jeney (nog@sdf.lonestar.net) ////
//// Nathan Yawn (nathan.yawn@opencores.org) ////
//// Raul Fajardo (rfajardo@gmail.com) ////
//// ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2000-2008 Authors ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: dbg_comm_vpi.v,v $
// Revision 1.2.1 2009/09/08 14:57 rfajardo
// Changed clock and reset outputs to inputs for minsoc
//
// $Log: dbg_comm_vpi.v,v $
// Revision 1.2 2009/05/17 20:55:57 Nathan
// Changed email address to opencores.org
//
// Revision 1.1 2008/07/26 17:33:20 Nathan
// Added debug comm module for use with VPI / network communication.
//
// Revision 1.1 2002/03/28 19:59:54 lampret
// Added bench directory
//
// Revision 1.1.1.1 2001/11/04 18:51:07 lampret
// First import.
//
// Revision 1.3 2001/09/24 14:06:13 mohor
// Changes connected to the OpenRISC access (SPR read, SPR write).
//
// Revision 1.2 2001/09/20 10:10:30 mohor
// Working version. Few bugs fixed, comments added.
//
// Revision 1.1.1.1 2001/09/13 13:49:19 mohor
// Initial official release.
//
//
//
//
//
 
`include "timescale.v"
 
`define JP_PORT "4567"
`define TIMEOUT_COUNT 6'd20 // 1/2 of a TCK clock will be this many SYS_CLK ticks. Must be less than 6 bits.
module dbg_comm_vpi (
SYS_CLK,
P_TMS,
P_TCK,
P_TRST,
P_TDI,
P_TDO
);
 
//parameter Tp = 20;
 
input SYS_CLK;
output P_TMS;
output P_TCK;
output P_TRST;
output P_TDI;
input P_TDO;
reg [4:0] memory; // [0:0];
 
 
wire P_TCK;
wire P_TRST;
wire P_TDI;
wire P_TMS;
wire P_TDO;
reg [3:0] in_word_r;
reg [5:0] clk_count;
 
// Handle commands from the upper level
initial
begin
in_word_r = 5'b0;
memory = 5'b0;
$jp_init(`JP_PORT);
#5500; // Wait until reset is complete
while(1)
begin
#1;
$jp_in(memory); // This will not change memory[][] if no command has been sent from jp
if(memory[4]) // was memory[0][4]
begin
in_word_r = memory[3:0];
memory = memory & 4'b1111;
clk_count = 6'b000000; // Reset the timeout clock in case jp wants to wait for a timeout / half TCK period
end
end
end
 
 
 
// Send the output bit to the upper layer
always @ (P_TDO)
begin
$jp_out(P_TDO);
end
 
 
assign P_TCK = in_word_r[0];
assign P_TRST = in_word_r[1];
assign P_TDI = in_word_r[2];
assign P_TMS = in_word_r[3];
 
 
// Send timeouts / wait periods to the upper layer
always @ (posedge SYS_CLK)
begin
if(clk_count < `TIMEOUT_COUNT) clk_count[5:0] = clk_count[5:0] + 1;
else if(clk_count == `TIMEOUT_COUNT) begin
$jp_wait_time();
clk_count[5:0] = clk_count[5:0] + 1;
end
// else it's already timed out, don't do anything
end
 
endmodule
 
dbg_comm_vpi.v Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property

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