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/* -*- c++ -*- */
/*
* Copyright 2008,2009 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <msdd_source_simple.h>
#include <gr_io_signature.h>
#include <string.h>
msdd_source_simple_sptr
msdd_make_source_simple (const char *src, unsigned short port_src)
{
return msdd_source_simple_sptr (new msdd_source_simple ( src, port_src));
}
msdd_source_simple::msdd_source_simple (const char *src,
unsigned short port_src)
: gr_sync_block("MSDD_SOURCE_SIMPLE",
gr_make_io_signature (0,0,0),
gr_make_io_signature (1, 1, sizeof (short))),
rcv(new MSDD6000((char*) src)), d_lastseq(0), d_firstrun(true)
{
set_output_multiple(MSDD_COMPLEX_SAMPLES_PER_PACKET*2);
}
msdd_source_simple::~msdd_source_simple ()
{
}
int
msdd_source_simple::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
#define BUF_LEN (MSDD_COMPLEX_SAMPLES_PER_PACKET*sizeof(short)*2 + 6)
signed short* out1 =(signed short*) output_items[0];
for(int i=0; i<floor(noutput_items*1.0/(2*MSDD_COMPLEX_SAMPLES_PER_PACKET));i++){
char buffer[BUF_LEN];
rcv->read( &buffer[0], BUF_LEN );
int seq = *((int*) &buffer[2]);
if(d_lastseq == -MSDD_COMPLEX_SAMPLES_PER_PACKET){
// not started case
if(seq == 0){
d_lastseq = 0;
} else {
// THROW AWAY SAMPLES WE ARE NOT STARTED YET!
return 0;
}
} else {
// started case
int samples_missed = seq - d_lastseq - MSDD_COMPLEX_SAMPLES_PER_PACKET;
if(samples_missed > 0){
if(d_firstrun == true){
// we may have missed some initial samples off the beginning of
// a stream but there are no drop outs in the middle of what we have
} else {
printf("dropped %d samples.\n", samples_missed);
}
}
d_lastseq = seq;
}
int out_idx = i*MSDD_COMPLEX_SAMPLES_PER_PACKET*2;
memcpy(&out1[out_idx], &buffer[6], BUF_LEN - 6);
d_firstrun = false;
}
return noutput_items;
}
bool msdd_source_simple::set_decim_rate(unsigned int rate)
{
rcv->set_decim((int) floor(log2(rate)));
return true;
}
bool msdd_source_simple::set_rx_freq(int channel, double freq)
{
long new_fc = (long)freq;
rcv->set_fc( new_fc/1000000, new_fc%1000000);
return true;
}
bool msdd_source_simple::set_pga(int which, double gain)
{
if(gain < 0 || gain > 10){
printf("GAIN IS OUTSIDE ACCEPTABLE RANGE!\n");
return false;
}
// ok i lied this is not really a pga, its decimation gain
rcv->set_ddc_gain((int)gain);
return true;
}
bool msdd_source_simple::start()
{
rcv->start();
return true;
}
bool msdd_source_simple::stop()
{
rcv->stop();
return true;
}
long msdd_source_simple::adc_freq()
{
return 102400000;
}
int msdd_source_simple::decim_rate()
{
return 1 << rcv->d_decim;
}
std::vector<int> msdd_source_simple::gain_range()
{
static std::vector<int> r;
r.push_back(0);
r.push_back(12);
return r;
}
std::vector<float> msdd_source_simple::freq_range()
{
std::vector<float> r;
r.push_back(30.0*1000*1000);
r.push_back(6.0*1000*1000*1000);
return r;
}
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