tb.h

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
  more contributor license agreements.  See the NOTICE file distributed
  with this work for additional information regarding copyright ownership.
  Accellera licenses this file to you under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with the
  License.  You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  implied.  See the License for the specific language governing
  permissions and limitations under the License.
 
 *****************************************************************************/
 
/*****************************************************************************
 
  tb.h -- 
 
  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
 
 *****************************************************************************/
 
/*****************************************************************************
 
  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.
 
      Name, Affiliation, Date:
  Description of Modification:
 
 *****************************************************************************/
 
#include "common.h"
 
SC_MODULE( testbench )
{
    SC_HAS_PROCESS( testbench );
 
    sc_in_clk clk;
 
    sc_out<bool>       reset;
    sc_out<bool>       x_ok;
    sc_out<bool>       y_ok;
    sc_in<bool>        data_ready;
    sc_in<bool>        select_xy;
    sc_in<bool_vector> coord_xy;
 
    void entry();
 
    testbench( sc_module_name            name_,
               const sc_clock&           clk_,
               sc_signal<bool>&          reset_,
               sc_signal<bool>&          x_ok_,
               sc_signal<bool>&          y_ok_,
               const sc_signal<bool>&    data_ready_,
               const sc_signal<bool>&    select_xy_,
               const signal_bool_vector& coord_xy_ )
        : sc_module( name_ )
    {
          clk( clk_ );
          reset( reset_ );
          x_ok( x_ok_ );
          y_ok( y_ok_ );
          data_ready( data_ready_ );
          select_xy( select_xy_ );
          coord_xy( coord_xy_ );
        SC_CTHREAD( entry, clk.neg() );
    }
};
 
sc_bv<16> mem[17];
 
void
testbench::entry()
{
    bool_vector x_coord;
    bool_vector y_coord;
    int x_flag = 0;
    int y_flag = 0;
    int i;              // Counter variable
    int x = 0;          // Memory location of x_coord
    int y = 1;          // Memory location of y_coord
    
    // reset initialization
    
    reset.write(1);
    x_ok.write(0);
    y_ok.write(0);
    wait();
    reset.write(0);
    wait();
 
    // fill display memory with zeros
 
    for (i = 1; i < 17; i++)
        mem[i] = 0;
 
    // capture of (x,y) coordinates
 
    while(true) {
 
        // wait for new x or y coordinate to be calculated
 
        do { wait(); } while (data_ready == 0);
 
        // capture x coordinate
 
        if(select_xy.read() == 0) {
            x_coord = coord_xy.read(); 
            x_flag = x_flag + 1;
            x_ok.write(1);
        }
 
        // capture y coordinate
 
        if(select_xy.read() == 1) {
            y_coord = coord_xy.read(); 
            y_flag = y_flag + 1;
            y_ok.write(1);
        }
 
        wait();
        x_ok.write(0);
        y_ok.write(0);
 
        // debug display of coordinate sets
        /*
        if (x_flag == y_flag) {
            cout << " Coordinate Set #" << x_flag
                 << " X = " << x_coord.to_int() 
                 << " Y = " << y_coord.to_int()
                 << endl;
        }
        */
 
        // conversion of x coordinate values to memory column locations
 
        if (x_coord.to_int() == -8) x = 15;
        if (x_coord.to_int() == -7) x = 14;
        if (x_coord.to_int() == -6) x = 13;
        if (x_coord.to_int() == -5) x = 12;
        if (x_coord.to_int() == -4) x = 11;
        if (x_coord.to_int() == -3) x = 10;
        if (x_coord.to_int() == -2) x = 9;
        if (x_coord.to_int() == -1) x = 8;
        if (x_coord.to_int() == 0) x = 7;
        if (x_coord.to_int() == 1) x = 6;
        if (x_coord.to_int() == 2) x = 5;
        if (x_coord.to_int() == 3) x = 4;
        if (x_coord.to_int() == 4) x = 3;
        if (x_coord.to_int() == 5) x = 2;
        if (x_coord.to_int() == 6) x = 1;
        if (x_coord.to_int() == 7) x = 0;
 
        // conversion of y coordinate values to memory row locations
 
        if (y_coord.to_int() == -8) y = 16;
        if (y_coord.to_int() == -7) y = 15;
        if (y_coord.to_int() == -6) y = 14;
        if (y_coord.to_int() == -5) y = 13;
        if (y_coord.to_int() == -4) y = 12;
        if (y_coord.to_int() == -3) y = 11;
        if (y_coord.to_int() == -2) y = 10;
        if (y_coord.to_int() == -1) y = 9;
        if (y_coord.to_int() == 0) y = 8;
        if (y_coord.to_int() == 1) y = 7;
        if (y_coord.to_int() == 2) y = 6;
        if (y_coord.to_int() == 3) y = 5;
        if (y_coord.to_int() == 4) y = 4;
        if (y_coord.to_int() == 5) y = 3;
        if (y_coord.to_int() == 6) y = 2;
        if (y_coord.to_int() == 7) y = 1;
 
        // turn bit high in memory for calculated coordinate
 
        mem[y][x] = 1;
 
        // stop simulation after 100 coordinates
 
        if (y_flag == 100) break;
 
    } // End of while loop
 
    cout << "\n\t FINAL MEMORY VALUES" << endl;
 
    for (i = 1; i < 17; i++)
        cout << "Memory Location " << i 
             << " : \t" << mem[i] << endl;
 
    sc_stop();
}