Subversion Repositories wbuart32

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

//

// Filename:    helloworld.cpp

//

// Project:     wbuart32, a full featured UART with simulator

//

// Purpose:     To demonstrate a useful Verilog file which could be used as a

//              toplevel program later, to demo the transmit UART.

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

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

//

// Copyright (C) 2015-2019, 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 <verilatedos.h>

#include <stdio.h>

#include <fcntl.h>

#include <unistd.h>

#include <string.h>

#include <time.h>

#include <sys/types.h>

#include <signal.h>

#include "verilated.h"

#include "verilated_vcd_c.h"

#include "Vhelloworld.h"

#include "uartsim.h"

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

        Verilated::commandArgs(argc, argv);

        Vhelloworld     tb;

        UARTSIM         *uart;

        int             port = 0;

        unsigned        setup = 868, clocks = 0, baudclocks;

        tb.i_setup = setup;

        uart = new UARTSIM(port);

        uart->setup(tb.i_setup);

        baudclocks = tb.i_setup & 0xfffffff;

#define VCDTRACE

#ifdef  VCDTRACE

        Verilated::traceEverOn(true);

        VerilatedVcdC* tfp = new VerilatedVcdC;

        tb.trace(tfp, 99);

        tfp->open("helloworld.vcd");

#define TRACE_POSEDGE   tfp->dump(10*clocks)

#define TRACE_NEGEDGE   tfp->dump(10*clocks+5)

#define TRACE_CLOSE     tfp->close()

#else

#define TRACE_POSEDGE

#define TRACE_NEGEDGE

#define TRACE_CLOSE

#endif

        clocks = 0;

        while(clocks < 16*32*baudclocks) {

                tb.i_clk = 1;

                tb.eval();

                TRACE_POSEDGE;

                tb.i_clk = 0;

                tb.eval();

                TRACE_NEGEDGE;

                (*uart)(tb.o_uart_tx);

                clocks++;

        }

        TRACE_CLOSE;

        printf("\n\nSimulation complete\n");

}