GNU Radio 2.x: gr_oscope_guts.h Source File

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# gr_oscope_guts.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2003,2005 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023
    00024 #ifndef INCLUDED_GR_OSCOPE_GUTS_H
    00025 #define INCLUDED_GR_OSCOPE_GUTS_H
    00026
    00027 #include <gr_trigger_mode.h>
    00028 #include <gr_msg_queue.h>
    00029
    00043 class gr_oscope_guts {
    00044 private:
    00045   static const int      MAX_CHANNELS = 16;
    00046   enum scope_state      { HOLD_OFF, LOOK_FOR_TRIGGER, POST_TRIGGER };
    00047
    00048   int                   d_nchannels;            // how many channels
    00049   gr_msg_queue_sptr     d_msgq;                 // message queue we stuff output records into
    00050   gr_trigger_mode       d_trigger_mode;
    00051   int                   d_trigger_channel;      // which channel to watch for trigger condition
    00052   double                d_sample_rate;          // input sample rate in Hz
    00053   double                d_update_rate;          // approx freq to produce an output record (Hz)
    00054   double                d_trigger_level;
    00055
    00056   int                   d_obi;                  // output buffer index
    00057   float                *d_buffer[MAX_CHANNELS];
    00058
    00059   scope_state           d_state;
    00060   int                   d_decimator_count;
    00061   int                   d_decimator_count_init;
    00062   int                   d_hold_off_count;
    00063   int                   d_hold_off_count_init;
    00064   int                   d_post_trigger_count;
    00065   int                   d_post_trigger_count_init;
    00066   float                 d_prev_sample;                  // used for trigger checking
    00067
    00068   // NOT IMPLEMENTED
    00069   gr_oscope_guts (const gr_oscope_guts &rhs);                   // no copy constructor
    00070   gr_oscope_guts &operator= (const gr_oscope_guts &rhs);        // no assignment operator
    00071
    00072   void trigger_changed ();
    00073   void update_rate_or_decimation_changed ();
    00074   int  found_trigger (float sample);    // returns -1, 0, +1
    00075   void write_output_records ();
    00076
    00077   void enter_hold_off ();                       // called on state entry
    00078   void enter_look_for_trigger ();
    00079   void enter_post_trigger ();
    00080
    00081 public:
    00082   // CREATORS
    00083   gr_oscope_guts (int nchannels, double sample_rate, gr_msg_queue_sptr msgq);
    00084   ~gr_oscope_guts ();
    00085
    00086   // MANIPULATORS
    00087
    00092   void process_sample (const float *channel_data);
    00093
    00094   bool set_update_rate (double update_rate);
    00095   bool set_decimation_count (int decimation_count);
    00096   bool set_trigger_channel (int channel);
    00097   bool set_trigger_mode (gr_trigger_mode mode);
    00098   bool set_trigger_level (double trigger_level);
    00099   bool set_trigger_level_auto ();                               // set to 50% level
    00100
    00101
    00102   // ACCESSORS
    00103   int num_channels () const;
    00104   double sampling_rate () const;
    00105   double update_rate () const;
    00106   int get_decimation_count () const;
    00107   int get_trigger_channel () const;
    00108   gr_trigger_mode get_trigger_mode () const;
    00109   double get_trigger_level () const;
    00110
    00111   // # of samples written to each output record.
    00112   int get_samples_per_output_record () const;
    00113 };
    00114
    00115 #endif /* INCLUDED_GR_OSCOPE_GUTS_H */