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/* -*- c++ -*- */
/*
* Copyright 2005,2008,2009 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <usb.h> /* needed for usb functions */
#include <getopt.h>
#include <assert.h>
#include <math.h>
#include <boost/scoped_ptr.hpp>
#include <usrp/usrp_local_sighandler.h>
#include <usrp/usrp_standard.h>
#include <usrp/usrp_bytesex.h>
char *prog_name;
static void
run_cal(usrp_standard_rx_sptr u, int which_side, int decim, bool verbose_p)
{
static const int BUFSIZE = u->block_size();
static const int N = BUFSIZE/sizeof (short);
short buf[N];
bool cal_done = false;
bool overrun;
int noverruns = 0;
static const double K = 1e-4;
long integrator[2];
int offset[2];
integrator[0] = 0;
integrator[1] = 0;
offset[0] = 0;
offset[1] = 0;
u->start(); // start data xfers
while(!cal_done){
int ret = u->read (buf, sizeof (buf), &overrun);
if (ret != (int) sizeof (buf)){
fprintf (stderr, "usrp_cal_dc_offset: error, ret = %d\n", ret);
continue;
}
if (overrun){
fprintf (stderr, "O");
noverruns++;
}
else {
// fputc('.', stderr);
}
static const int MAX = (1L << 30); // 1G
for (int i = 0; i < N/2; i++){
for (int n = 0; n < 2; n++){
integrator[n] = integrator[n] + buf[2*i + n];
if (integrator[n] > MAX)
integrator[n] = MAX;
else if (integrator[n] < -MAX)
integrator[n] = -MAX;
}
}
#if 1
for (int n = 0; n < 2; n++){
offset[n] = (int) rint(integrator[n] * K);
if (offset[n] > 32767)
offset[n] = 32767;
else if (offset[n] < -32767)
offset[n] = -32767;
u->set_adc_offset(which_side * 2 + n, offset[n]);
}
#else
offset[0] = (int) rint(integrator[0] * K);
if (offset[0] > 32767)
offset[0] = 32767;
else if (offset[0] < -32767)
offset[0] = -32767;
u->set_adc_offset(which_side * 2 + 0, offset[0]);
u->set_adc_offset(which_side * 2 + 1, offset[0]);
#endif
printf ("%9ld : %6d\t\t%9ld : %6d\n",
integrator[0], offset[0], integrator[1], offset[1]);
}
u->stop();
}
static void
set_progname (char *path)
{
char *p = strrchr (path, '/');
if (p != 0)
prog_name = p+1;
else
prog_name = path;
}
static void
usage ()
{
fprintf(stderr, "usage: %s [-v] [-w which_side] [-D decim] [-c ddc_freq] [-g gain]\n", prog_name);
fprintf(stderr, " [-S fusb_block_size] [-N fusb_nblocks]\n");
exit (1);
}
static void
die (const char *msg)
{
fprintf (stderr, "die: %s: %s\n", prog_name, msg);
exit (1);
}
int
main (int argc, char **argv)
{
int ch;
int decim = 128; // 500 kS/sec
bool verbose_p = false;
int which_board = 0;
int which_side = 0;
double ddc_freq = 0;
int fusb_block_size = 1024;
int fusb_nblocks = 4;
double pga_gain = 0.0;
set_progname(argv[0]);
while ((ch = getopt (argc, argv, "vw:D:c:S:N:g:")) != EOF){
switch (ch){
case 'w':
which_side = strtol (optarg, 0, 0);
if (which_side < 0 || which_side > 1)
usage();
break;
case 'D':
decim = strtol (optarg, 0, 0);
if (decim < 1)
usage();
break;
case 'c':
ddc_freq = strtod (optarg, 0);
break;
case 'v':
verbose_p = true;
break;
case 'S':
fusb_block_size = strtol(optarg, 0, 0);
break;
case 'N':
fusb_nblocks = strtol(optarg, 0, 0);
break;
case 'g':
pga_gain = strtod (optarg, 0);
break;
default:
usage ();
}
}
int nchannels = 1;
int mode = usrp_standard_rx::FPGA_MODE_NORMAL;
int mux;
if (which_side == 0)
mux = 0x00000010;
else
mux = 0x00000032;
#ifdef SIGINT
usrp_local_sighandler sigint (SIGINT, usrp_local_sighandler::throw_signal);
#endif
#ifdef SIGQUIT
usrp_local_sighandler sigquit (SIGQUIT, usrp_local_sighandler::throw_signal);
#endif
usrp_standard_rx_sptr urx =
usrp_standard_rx::make(which_board, decim,
nchannels, mux, mode,
fusb_block_size, fusb_nblocks);
if (!urx)
die("usrp_standard_rx::make");
try {
if (!urx->set_rx_freq(0, ddc_freq))
die("urx->set_rx_freq");
urx->set_pga(2 * which_side + 0, pga_gain);
urx->set_pga(2 * which_side + 1, pga_gain);
run_cal(urx, which_side, decim, verbose_p);
}
catch (usrp_signal &sig){
fprintf (stderr, "usrp_cal_dc_offset: caught %s\n", sig.name().c_str());
}
catch(...){
fprintf (stderr, "usrp_cal_dc_offset: caught something\n");
}
}
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