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/* -*- c++ -*- */
/*
* Copyright 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_COMEDI_SOURCE_S_H
#define INCLUDED_COMEDI_SOURCE_S_H
#include <gr_sync_block.h>
#include <string>
#include <comedilib.h>
#include <stdexcept>
class comedi_source_s;
typedef boost::shared_ptr<comedi_source_s> comedi_source_s_sptr;
/*!
* \brief make a COMEDI source.
*
* \param sampling_freq sampling rate in Hz
* \param dev COMEDI device name, e.g., "/dev/comedi0"
*/
comedi_source_s_sptr
comedi_make_source_s (int sampling_freq,
const std::string dev = "/dev/comedi0");
/*!
* \brief source using COMEDI
*
* The source has one to many input stream of signed short integers.
*
* Output samples will be in the range [-32768,32767].
*/
class comedi_source_s : public gr_sync_block {
friend comedi_source_s_sptr
comedi_make_source_s (int sampling_freq, const std::string device_name);
// typedef for pointer to class work method
typedef int (comedi_source_s::*work_t)(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
unsigned int d_sampling_freq;
std::string d_device_name;
comedi_t *d_dev;
int d_subdevice;
int d_n_chan;
void *d_map;
int d_buffer_size;
unsigned d_buf_front;
unsigned d_buf_back;
// random stats
int d_noverruns; // count of overruns
void output_error_msg (const char *msg, int err);
void bail (const char *msg, int err) throw (std::runtime_error);
protected:
comedi_source_s (int sampling_freq, const std::string device_name);
public:
~comedi_source_s ();
bool check_topology (int ninputs, int noutputs);
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_COMEDI_SOURCE_S_H */
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