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////////////////////////////////////////////////////////////////////////////////

//

// Filename:    erxscope.cpp

//

// Project:     XuLA2-LX25 SoC based upon the ZipCPU

//

// Purpose:     This file decodes the debug bits produced by the enetpackets.v

//              Verilog module, and stored in a Wishbone Scope.  It is useful

//      for determining if the packet transmitter works at all or not.

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2016, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with this program.  (It's in the $(ROOT)/doc directory, run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <strings.h>

#include <ctype.h>

#include <string.h>

#include <signal.h>

#include <assert.h>

#include "port.h"

#include "regdefs.h"

#include "scopecls.h"

#define WBSCOPE         R_NETSCOPE

#define WBSCOPEDATA     R_NETSCOPED

FPGA    *m_fpga;

void    closeup(int v) {

        m_fpga->kill();

        exit(0);

}

class   ERXSCOPE : public SCOPE {

public:

        ERXSCOPE(FPGA *fpga, unsigned addr, bool vecread = true)

                : SCOPE(fpga, addr, false, vecread) {};

        ~ERXSCOPE(void) {}

        virtual void    decode(DEVBUS::BUSW val) const {

                int     trigger, nerr, wr, nprev, crcv, mace, bcast, clear,

                        rxerr, miss, rxvalid, rxbusy, crs, dv, rxd, macv,

                        pred, crcd, macd, neop;

                trigger= (val>>31)&1;

                neop   = (val>>30)&1;

                wr     = (val>>29)&1;

                nprev  = (val>>28)&1;

                pred   = (val>>24)&15;

                crcv   = (val>>23)&1;

                crcd   = (val>>19)&15;

                mace   = (val>>18)&1;

                bcast  = (val>>17)&1;

                macv   = (val>>16)&1;

                macd   = (val>>12)&15;

                clear  = (val>>11)&1;

                rxerr  = (val>>10)&1;

                miss   = (val>> 9)&1;

                nerr   = (val>> 8)&1;

                rxvalid= (val>> 7)&1;

                rxbusy = (val>> 6)&1;

                crs    = (val>> 5)&1;

                dv     = (val>> 4)&1;

                rxd    = (val    )&15;

                printf("%s [%s%s%s%x] p[%s%x] c[%s%x] m[%s%s%s%x] ![%s-] %s%s%s%s%s%s",

                        (trigger)?"TR":"  ",

                        (rxerr)?"RXER":"    ",

                        (crs)?"CRS":"   ",

                        (dv)?"DV":"  ",  rxd,

                        (nprev)?"P":" ", pred,

                        (crcv)?"C":" ",  crcd,

                        (bcast)?"B":" ", (mace)?"E":" ", (macv)?"M":" ",  macd,

                        (wr)?"WR":"  ", (nerr)?"ER":"  ", (rxbusy)?"BSY":"   ",

                        (neop)?"EOP":"   ",

                        (miss)?"MISS":"    ", (clear)?"CLEAR":"     ",

                        (rxvalid)?"VALID":"     ");

        }

};

int main(int argc, char **argv) {

        FPGAOPEN(m_fpga);

        signal(SIGSTOP, closeup);

        signal(SIGHUP, closeup);

        ERXSCOPE *scope = new ERXSCOPE(m_fpga, WBSCOPE);

        if (!scope->ready()) {

                printf("Scope is not yet ready:\n");

                scope->decode_control();

        } else

                scope->read();

        delete  m_fpga;

}