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/* -*- c++ -*- */
/*
* Copyright 2003,2005 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_OSCOPE_GUTS_H
#define INCLUDED_GR_OSCOPE_GUTS_H
#include <gr_core_api.h>
#include <gr_trigger_mode.h>
#include <gr_msg_queue.h>
/*!
* \brief guts of oscilloscope trigger and buffer module
*
* This module processes sets of samples provided the \p process_sample
* method. When appropriate given the updateRate, sampleRate and
* trigger conditions, process_sample will periodically write output
* records of captured data to output_fd. For each trigger event,
* nchannels records will be written. Each record consists of
* get_samples_per_output_record binary floats. The trigger instant
* occurs at the 1/2 way point in the buffer. Thus, output records
* consist of 50% pre-trigger data and 50% post-trigger data.
*/
class GR_CORE_API gr_oscope_guts {
public:
static const int MAX_CHANNELS = 8;
private:
enum scope_state { HOLD_OFF, LOOK_FOR_TRIGGER, POST_TRIGGER };
int d_nchannels; // how many channels
gr_msg_queue_sptr d_msgq; // message queue we stuff output records into
gr_trigger_mode d_trigger_mode;
gr_trigger_slope d_trigger_slope;
int d_trigger_channel; // which channel to watch for trigger condition
double d_sample_rate; // input sample rate in Hz
double d_update_rate; // approx freq to produce an output record (Hz)
double d_trigger_level;
int d_obi; // output buffer index
float *d_buffer[MAX_CHANNELS];
scope_state d_state;
int d_decimator_count;
int d_decimator_count_init;
int d_hold_off_count;
int d_hold_off_count_init;
int d_pre_trigger_count;
int d_post_trigger_count;
int d_post_trigger_count_init;
float d_trigger_off; //%sample trigger is off
// NOT IMPLEMENTED
gr_oscope_guts (const gr_oscope_guts &rhs); // no copy constructor
gr_oscope_guts &operator= (const gr_oscope_guts &rhs); // no assignment operator
void trigger_changed ();
void update_rate_or_decimation_changed ();
bool found_trigger (); // returns true if found
void write_output_records ();
void enter_hold_off (); // called on state entry
void enter_look_for_trigger ();
void enter_post_trigger ();
public:
// CREATORS
gr_oscope_guts (double sample_rate, gr_msg_queue_sptr msgq);
~gr_oscope_guts ();
// MANIPULATORS
/*!
* \p channel_data points to nchannels float values. These are the values
* for each channel at this sample time.
*/
void process_sample (const float *channel_data);
bool set_update_rate (double update_rate);
bool set_decimation_count (int decimation_count);
bool set_trigger_channel (int channel);
bool set_trigger_mode (gr_trigger_mode mode);
bool set_trigger_slope (gr_trigger_slope slope);
bool set_trigger_level (double trigger_level);
bool set_trigger_level_auto (); // set to 50% level
bool set_sample_rate(double sample_rate);
bool set_num_channels(int nchannels);
// ACCESSORS
int num_channels () const;
double sample_rate () const;
double update_rate () const;
int get_decimation_count () const;
int get_trigger_channel () const;
gr_trigger_mode get_trigger_mode () const;
gr_trigger_slope get_trigger_slope () const;
double get_trigger_level () const;
// # of samples written to each output record.
int get_samples_per_output_record () const;
};
#endif /* INCLUDED_GR_OSCOPE_GUTS_H */
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