nco.h

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#ifndef NCO
#define NCO
#include <spuc.h>
// 
// Copyright(c) 1993-1996 Tony Kirke
// author="Tony Kirke" *
/*
 * SPUC - Signal processing using C++ - A DSP library
 * Copyright (C) 1993-2001 Tony Kirke.
 * 
 * This program is free software; 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 2, 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
 * MERCHANTABILITY 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; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
namespace SPUC {












class nco
{
public:
        unsigned long phase;
//      char v[20];

protected:
        unsigned long acc;
        unsigned long fcw;
        unsigned long new_fcw;
        unsigned long mask_bits;

public:
        nco(long bits=8);
        inline void reset() { phase = new_fcw = fcw = acc = 0; }
        inline void set_frequency(unsigned long freq) { fcw = freq; }
        inline void reset_frequency(unsigned long freq) { new_fcw = fcw = freq; }
        inline long get_phase(void) { return(phase);}
        inline void load(long loop_filter_out) {new_fcw = fcw + loop_filter_out;}
        long clock(long loop_filter_out);
        long clock();
};
} // namespace SPUC 
#endif

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