Kyle Keen
12 years ago
committed by
Steve Markgraf
parent
53775a2ebf
commit
dbc49549a0
@ -0,0 +1,870 @@ |
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/*
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* rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver |
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* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de> |
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* Copyright (C) 2012 by Hoernchen <la@tfc-server.de> |
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* Copyright (C) 2012 by Kyle Keen <keenerd@gmail.com> |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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|
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/*
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* rtl_power: general purpose FFT integrator |
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* -f low_freq:high_freq:max_bin_size |
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* -i seconds |
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* outputs CSV |
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* time, low, high, step, db, db, db ... |
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* db optional? raw output might be better for noise correction |
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* todo: |
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* threading |
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* randomized hopping |
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* noise correction |
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* continuous IIR |
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* general astronomy usefulness |
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* multiple dongles |
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* multiple FFT workers |
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* fft bins smaller than 61Hz |
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* bandwidths smaller than 1MHz |
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* check edge cropping for off-by-one and rounding errors |
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*/ |
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#include <errno.h> |
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#include <signal.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#include <time.h> |
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#ifndef _WIN32 |
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#include <unistd.h> |
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#else |
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#include <Windows.h> |
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#include <fcntl.h> |
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#include <io.h> |
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#include "getopt/getopt.h" |
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#define usleep(x) Sleep(x/1000) |
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#define round(x) (x > 0.0 ? floor(x + 0.5): ceil(x - 0.5)) |
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#endif |
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#include <pthread.h> |
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#include <libusb.h> |
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#include "rtl-sdr.h" |
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#define DEFAULT_SAMPLE_RATE 24000 |
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#define DEFAULT_ASYNC_BUF_NUMBER 32 |
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#define DEFAULT_BUF_LENGTH (1 * 16384) |
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#define MAXIMUM_OVERSAMPLE 16 |
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#define MAXIMUM_BUF_LENGTH (MAXIMUM_OVERSAMPLE * DEFAULT_BUF_LENGTH) |
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#define AUTO_GAIN -100 |
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#define BUFFER_DUMP (1<<12) |
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static volatile int do_exit = 0; |
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static rtlsdr_dev_t *dev = NULL; |
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FILE *file; |
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int16_t* Sinewave; |
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double* power_table; |
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int N_WAVE, LOG2_N_WAVE; |
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int next_power; |
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int16_t *fft_buf; |
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int *window_coefs; |
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struct tuning_state |
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/* one per tuning range */ |
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{ |
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int freq; |
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int rate; |
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int bin_e; |
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long *avg; /* length == 2^bin_e */ |
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int samples; |
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long mega_samples; |
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//pthread_rwlock_t avg_lock;
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//pthread_mutex_t avg_mutex;
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/* having the iq buffer here is wasteful, but will avoid contention */ |
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uint8_t *buf8; |
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int buf_len; |
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//pthread_rwlock_t buf_lock;
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//pthread_mutex_t buf_mutex;
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}; |
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/* 3000 is enough for 3GHz b/w worst case */ |
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#define MAX_TUNES 3000 |
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struct tuning_state tunes[MAX_TUNES]; |
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int tune_count = 0; |
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void usage(void) |
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{ |
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fprintf(stderr, |
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"rtl_power, a simple FFT logger for RTL2832 based DVB-T receivers\n\n" |
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"Use:\trtl_power -f freq_range [-options] [filename]\n" |
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"\t-f lower:upper:bin_size [Hz]\n" |
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"\t (bin size is a maximum, smaller more convenient bins\n" |
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"\t will be used. valid range 61-2M)\n" |
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"\t[-i integration_interval (default: 10 seconds)]\n" |
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"\t (buggy if a full sweep takes longer than the interval)\n" |
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"\t[-1 enables single-shot mode (default: off)]\n" |
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"\t[-e exit_timer (default: off/0)]\n" |
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//"\t[-s avg/iir smoothing (default: avg)]\n"
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//"\t[-t threads (default: 1)]\n"
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"\t[-d device_index (default: 0)]\n" |
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"\t[-g tuner_gain (default: automatic)]\n" |
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"\t[-p ppm_error (default: 0)]\n" |
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"\tfilename (a '-' dumps samples to stdout)\n" |
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"\t (omitting the filename also uses stdout)\n" |
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"\n" |
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"Experimental options:\n" |
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"\t[-w window (default: rectangle)]\n" |
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"\t (hamming, blackman, blackman-harris, hann-poisson, bartlett, youssef)\n" |
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// kaiser
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"\t[-c crop_percent (default: 0%, recommended: 20%%-50%%)]\n" |
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"\t (discards data at the edges, 100%% discards everything)\n" |
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"\t (has no effect in rms bin mode)\n" |
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"\n" |
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"CSV FFT output columns:\n" |
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"\tdate, time, Hz low, Hz high, Hz step, samples, dbm, dbm, ...\n\n" |
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"Examples:\n" |
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"\trtl_power -f 88M:108M:125k fm_stations.csv\n" |
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"\t (creates 160 bins across the FM band,\n" |
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"\t individual stations should be visible)\n" |
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"\trtl_power -f 100M:1G:1M -i 5m -1 survey.csv\n" |
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"\t (a five minute low res scan of nearly everything)\n" |
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"\trtl_power -f ... -i 15m -1 log.csv\n" |
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"\t (integrate for 15 minutes and exit afterwards)\n" |
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"\trtl_power -f ... -e 1h | gzip > log.csv.gz\n" |
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"\t (collect data for one hour and compress it on the fly)\n" |
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"Convert CSV to a waterfall graphic with\n" |
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"\thttp://kmkeen.com/tmp/heatmap.py.txt\n" |
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""); |
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exit(1); |
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} |
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#ifdef _WIN32 |
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BOOL WINAPI |
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sighandler(int signum) |
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{ |
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if (CTRL_C_EVENT == signum) { |
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fprintf(stderr, "Signal caught, exiting!\n"); |
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do_exit = 1; |
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return TRUE; |
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} |
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return FALSE; |
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} |
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#else |
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static void sighandler(int signum) |
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{ |
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fprintf(stderr, "Signal caught, exiting!\n"); |
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do_exit = 1; |
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} |
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#endif |
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/* more cond dumbness */ |
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#define safe_cond_signal(n, m) pthread_mutex_lock(m); pthread_cond_signal(n); pthread_mutex_unlock(m) |
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#define safe_cond_wait(n, m) pthread_mutex_lock(m); pthread_cond_wait(n, m); pthread_mutex_unlock(m) |
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/* FFT based on fix_fft.c by Roberts, Slaney and Bouras
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http://www.jjj.de/fft/fftpage.html
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16 bit ints for everything |
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-32768..+32768 maps to -1.0..+1.0 |
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*/ |
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void sine_table(int size) |
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{ |
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int i; |
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double d; |
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LOG2_N_WAVE = size; |
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N_WAVE = 1 << LOG2_N_WAVE; |
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Sinewave = malloc(sizeof(int16_t) * N_WAVE*3/4); |
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power_table = malloc(sizeof(double) * N_WAVE); |
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for (i=0; i<N_WAVE*3/4; i++) |
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{ |
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d = (double)i * 2.0 * M_PI / N_WAVE; |
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Sinewave[i] = (int)round(32767*sin(d)); |
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//printf("%i\n", Sinewave[i]);
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} |
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} |
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inline int16_t FIX_MPY(int16_t a, int16_t b) |
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/* fixed point multiply and scale */ |
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{ |
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int c = ((int)a * (int)b) >> 14; |
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b = c & 0x01; |
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return (c >> 1) + b; |
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} |
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int fix_fft(int16_t iq[], int16_t m) |
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/* interleaved iq[], 0 <= n < 2**m, changes in place */ |
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{ |
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int mr, nn, i, j, l, k, istep, n, shift; |
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int16_t qr, qi, tr, ti, wr, wi; |
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n = 1 << m; |
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if (n > N_WAVE) |
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{return -1;} |
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mr = 0; |
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nn = n - 1; |
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/* decimation in time - re-order data */ |
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for (m=1; m<=nn; ++m) { |
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l = n; |
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do |
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{l >>= 1;} |
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while (mr+l > nn); |
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mr = (mr & (l-1)) + l; |
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if (mr <= m) |
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{continue;} |
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// real = 2*m, imag = 2*m+1
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tr = iq[2*m]; |
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iq[2*m] = iq[2*mr]; |
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iq[2*mr] = tr; |
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ti = iq[2*m+1]; |
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iq[2*m+1] = iq[2*mr+1]; |
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iq[2*mr+1] = ti; |
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} |
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l = 1; |
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k = LOG2_N_WAVE-1; |
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while (l < n) { |
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shift = 1; |
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istep = l << 1; |
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for (m=0; m<l; ++m) { |
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j = m << k; |
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wr = Sinewave[j+N_WAVE/4]; |
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wi = -Sinewave[j]; |
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if (shift) { |
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wr >>= 1; wi >>= 1;} |
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for (i=m; i<n; i+=istep) { |
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j = i + l; |
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tr = FIX_MPY(wr,iq[2*j]) - FIX_MPY(wi,iq[2*j+1]); |
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ti = FIX_MPY(wr,iq[2*j+1]) + FIX_MPY(wi,iq[2*j]); |
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qr = iq[2*i]; |
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qi = iq[2*i+1]; |
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if (shift) { |
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qr >>= 1; qi >>= 1;} |
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iq[2*j] = qr - tr; |
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iq[2*j+1] = qi - ti; |
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iq[2*i] = qr + tr; |
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iq[2*i+1] = qi + ti; |
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} |
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} |
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--k; |
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l = istep; |
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} |
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return 0; |
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} |
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double rectangle(int i, int length) |
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{ |
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return 1.0; |
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} |
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double hamming(int i, int length) |
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{ |
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double a, b, w, N1; |
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a = 25.0/46.0; |
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b = 21.0/46.0; |
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N1 = (double)(length-1); |
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w = a - b*cos(2*i*M_PI/N1); |
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return w; |
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} |
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double blackman(int i, int length) |
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{ |
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double a0, a1, a2, w, N1; |
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a0 = 7938.0/18608.0; |
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a1 = 9240.0/18608.0; |
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a2 = 1430.0/18608.0; |
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N1 = (double)(length-1); |
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w = a0 - a1*cos(2*i*M_PI/N1) + a2*cos(4*i*M_PI/N1); |
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return w; |
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} |
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double blackman_harris(int i, int length) |
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{ |
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double a0, a1, a2, a3, w, N1; |
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a0 = 0.35875; |
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a1 = 0.48829; |
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a2 = 0.14128; |
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a3 = 0.01168; |
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N1 = (double)(length-1); |
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w = a0 - a1*cos(2*i*M_PI/N1) + a2*cos(4*i*M_PI/N1) - a3*cos(6*i*M_PI/N1); |
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return w; |
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} |
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double hann_poisson(int i, int length) |
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{ |
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double a, N1, w; |
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a = 2.0; |
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N1 = (double)(length-1); |
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w = 0.5 * (1 - cos(2*M_PI*i/N1)) * \
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pow(M_E, (-a*(double)abs((int)(N1-1-2*i)))/N1); |
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return w; |
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} |
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double youssef(int i, int length) |
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/* really a blackman-harris-poisson window, but that is a mouthful */ |
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{ |
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double a, a0, a1, a2, a3, w, N1; |
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a0 = 0.35875; |
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a1 = 0.48829; |
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a2 = 0.14128; |
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a3 = 0.01168; |
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N1 = (double)(length-1); |
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w = a0 - a1*cos(2*i*M_PI/N1) + a2*cos(4*i*M_PI/N1) - a3*cos(6*i*M_PI/N1); |
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a = 0.0025; |
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w *= pow(M_E, (-a*(double)abs((int)(N1-1-2*i)))/N1); |
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return w; |
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} |
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double kaiser(int i, int length) |
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// todo, become more smart
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{ |
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return 1.0; |
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} |
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double bartlett(int i, int length) |
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{ |
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double N1, L, w; |
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L = (double)length; |
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N1 = L - 1; |
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w = (i - N1/2) / (L/2); |
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if (w < 0) { |
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w = -w;} |
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w = 1 - w; |
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return w; |
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} |
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void rms_power(struct tuning_state *ts) |
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/* for bins between 1MHz and 2MHz */ |
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{ |
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int i, s; |
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uint8_t *buf = ts->buf8; |
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int buf_len = ts->buf_len; |
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long p, t; |
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int ln, lp; |
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double dc, err; |
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p = t = 0L; |
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for (i=0; i<buf_len; i++) { |
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s = (int)buf[i] - 127; |
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t += (long)s; |
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p += (long)(s * s); |
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} |
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/* correct for dc offset in squares */ |
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dc = (double)t / (double)buf_len; |
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err = t * 2 * dc - dc * dc * buf_len; |
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p -= (long)round(err); |
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ts->avg[0] += p; |
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ts->samples += 1; |
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/* complex pairs, half length */ |
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ts->mega_samples += (long)(buf_len/2); |
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} |
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double atofs(char *f) |
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/* standard suffixes */ |
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{ |
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char last; |
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int len; |
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double suff = 1.0; |
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len = strlen(f); |
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last = f[len-1]; |
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f[len-1] = '\0'; |
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switch (last) { |
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case 'g': |
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case 'G': |
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suff *= 1e3; |
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case 'm': |
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case 'M': |
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suff *= 1e3; |
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case 'k': |
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case 'K': |
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suff *= 1e3; |
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suff *= atof(f); |
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f[len-1] = last; |
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return suff; |
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} |
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f[len-1] = last; |
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return atof(f); |
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} |
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double atoft(char *f) |
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/* time suffixes */ |
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{ |
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char last; |
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int len; |
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double suff = 1.0; |
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len = strlen(f); |
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last = f[len-1]; |
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f[len-1] = '\0'; |
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switch (last) { |
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case 'h': |
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case 'H': |
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suff *= 60; |
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case 'm': |
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case 'M': |
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suff *= 60; |
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case 's': |
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case 'S': |
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suff *= atof(f); |
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f[len-1] = last; |
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return suff; |
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} |
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f[len-1] = last; |
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return atof(f); |
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} |
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double atofp(char *f) |
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/* percent suffixes */ |
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{ |
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char last; |
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int len; |
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double suff = 1.0; |
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len = strlen(f); |
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last = f[len-1]; |
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f[len-1] = '\0'; |
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switch (last) { |
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case '%': |
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suff *= 0.01; |
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suff *= atof(f); |
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f[len-1] = last; |
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return suff; |
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} |
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f[len-1] = last; |
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return atof(f); |
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} |
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int nearest_gain(int target_gain) |
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{ |
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int i, err1, err2, count, close_gain; |
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int* gains; |
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count = rtlsdr_get_tuner_gains(dev, NULL); |
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if (count <= 0) { |
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return 0; |
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} |
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gains = malloc(sizeof(int) * count); |
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count = rtlsdr_get_tuner_gains(dev, gains); |
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close_gain = gains[0]; |
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for (i=0; i<count; i++) { |
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err1 = abs(target_gain - close_gain); |
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err2 = abs(target_gain - gains[i]); |
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if (err2 < err1) { |
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close_gain = gains[i]; |
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} |
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} |
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free(gains); |
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return close_gain; |
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} |
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void frequency_range(char *arg, double crop) |
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/* flesh out the tunes[] for scanning */ |
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// do we want the fewest ranges (easy) or the fewest bins (harder)?
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{ |
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char *start, *stop, *step; |
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int i, j, upper, lower, max_size, bw_seen, bw_used, bin_size, bin_e, buf_len; |
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struct tuning_state *ts; |
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/* hacky string parsing */ |
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start = arg; |
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stop = strchr(start, ':') + 1; |
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stop[-1] = '\0'; |
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step = strchr(stop, ':') + 1; |
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step[-1] = '\0'; |
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lower = (int)atofs(start); |
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upper = (int)atofs(stop); |
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max_size = (int)atofs(step); |
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stop[-1] = ':'; |
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step[-1] = ':'; |
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/* evenly sized ranges, as close to 2MHz as possible */ |
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for (i=1; i<1500; i++) { |
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bw_seen = (upper - lower) / i; |
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bw_used = (int)((double)(bw_seen) / (1.0 - crop)); |
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if (bw_used > 2000000) { |
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continue;} |
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tune_count = i; |
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break; |
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} |
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/* number of bins is power-of-two, bin size is under limit */ |
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for (i=1; i<=21; i++) { |
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bin_e = i; |
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bin_size = bw_used / (1<<i); |
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if (bin_size <= max_size) { |
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break;} |
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} |
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/* unless giant bins */ |
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if (max_size >= 1000000) { |
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bw_seen = max_size; |
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bw_used = max_size; |
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tune_count = (upper - lower) / bw_seen; |
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bin_e = 0; |
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} |
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if (tune_count > MAX_TUNES) { |
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fprintf(stderr, "Error: bandwidth too wide.\n"); |
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exit(1); |
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} |
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buf_len = DEFAULT_BUF_LENGTH; |
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if ((2<<bin_e) > buf_len) { |
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buf_len = (2<<bin_e); |
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} |
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/* build the array */ |
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for (i=0; i<tune_count; i++) { |
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ts = &tunes[i]; |
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ts->freq = lower + i*bw_seen + bw_seen/2; |
||||
ts->rate = bw_used; |
||||
ts->bin_e = bin_e; |
||||
ts->samples = 0; |
||||
ts->mega_samples = 0L; |
||||
ts->avg = (long*)malloc((1<<bin_e) * sizeof(long)); |
||||
if (!ts->avg) { |
||||
fprintf(stderr, "Error: malloc.\n"); |
||||
exit(1); |
||||
} |
||||
for (j=0; j<(1<<bin_e); j++) { |
||||
ts->avg[j] = 0L; |
||||
} |
||||
ts->buf8 = (uint8_t*)malloc(buf_len * sizeof(uint8_t)); |
||||
if (!ts->buf8) { |
||||
fprintf(stderr, "Error: malloc.\n"); |
||||
exit(1); |
||||
} |
||||
ts->buf_len = buf_len; |
||||
} |
||||
/* report */ |
||||
fprintf(stderr, "Number of frequency hops: %i\n", tune_count); |
||||
fprintf(stderr, "Dongle bandwidth: %iHz\n", bw_used); |
||||
fprintf(stderr, "Total FFT bins: %i\n", tune_count * (1<<bin_e)); |
||||
fprintf(stderr, "Logged FFT bins: %i\n", \
|
||||
(int)((double)(tune_count * (1<<bin_e)) * (1.0-crop))); |
||||
fprintf(stderr, "FFT bin size: %iHz\n", bin_size); |
||||
fprintf(stderr, "Buffer size: %0.2fms\n", 1000 * 0.5 * (float)buf_len / (float)bw_used); |
||||
} |
||||
|
||||
void retune(rtlsdr_dev_t *d, int freq) |
||||
{ |
||||
uint8_t dump[BUFFER_DUMP]; |
||||
int n_read; |
||||
rtlsdr_set_center_freq(d, (uint32_t)freq); |
||||
/* wait for settling and flush buffer */ |
||||
usleep(5000); |
||||
rtlsdr_read_sync(d, &dump, BUFFER_DUMP, &n_read); |
||||
if (n_read != BUFFER_DUMP) { |
||||
fprintf(stderr, "Error: bad retune.\n");} |
||||
} |
||||
|
||||
void scanner(void) |
||||
{ |
||||
int i, j, f, n_read, offset, bin_e, bin_len, buf_len; |
||||
struct tuning_state *ts; |
||||
bin_e = tunes[0].bin_e; |
||||
bin_len = 1 << bin_e; |
||||
buf_len = tunes[0].buf_len; |
||||
for (i=0; i<tune_count; i++) { |
||||
if (do_exit) { |
||||
break;} |
||||
ts = &tunes[i]; |
||||
f = (int)rtlsdr_get_center_freq(dev); |
||||
if (f != ts->freq) { |
||||
retune(dev, ts->freq);} |
||||
rtlsdr_read_sync(dev, ts->buf8, buf_len, &n_read); |
||||
if (n_read != buf_len) { |
||||
fprintf(stderr, "Error: dropped samples.\n");} |
||||
/* rms */ |
||||
if (bin_len == 1) { |
||||
rms_power(ts); |
||||
continue; |
||||
} |
||||
/* fft */ |
||||
for (j=0; j<buf_len; j++) { |
||||
fft_buf[j] = (int16_t)ts->buf8[j] - 127; |
||||
} |
||||
for (offset=0; offset<buf_len; offset+=(2*bin_len)) { |
||||
// todo, let rect skip this
|
||||
for (j=0; j<bin_len; j++) { |
||||
fft_buf[offset+j*2] *= window_coefs[j]; |
||||
fft_buf[offset+j*2+1] *= window_coefs[j]; |
||||
} |
||||
fix_fft(fft_buf+offset, bin_e); |
||||
for (j=0; j<bin_len; j++) { |
||||
ts->avg[j] += (long) abs(fft_buf[offset+j*2]); |
||||
} |
||||
ts->samples += 1; |
||||
} |
||||
} |
||||
} |
||||
|
||||
void csv_dbm(struct tuning_state *ts, double crop) |
||||
{ |
||||
int i, len, i1, i2, bw2; |
||||
long tmp; |
||||
double dbm; |
||||
len = 1 << ts->bin_e; |
||||
/* fix FFT stuff quirks */ |
||||
if (ts->bin_e > 0) { |
||||
/* nuke DC component (not effective for all windows) */ |
||||
ts->avg[0] = ts->avg[1]; |
||||
/* FFT is translated by 180 degrees */ |
||||
for (i=0; i<len/2; i++) { |
||||
tmp = ts->avg[i]; |
||||
ts->avg[i] = ts->avg[i+len/2]; |
||||
ts->avg[i+len/2] = tmp; |
||||
} |
||||
} |
||||
/* Hz low, Hz high, Hz step, samples, dbm, dbm, ... */ |
||||
bw2 = (int)((double)ts->rate * (1.0-crop) * 0.5); |
||||
fprintf(file, "%i, %i, %.2f, %i, ", ts->freq - bw2, ts->freq + bw2, |
||||
(double)ts->rate / (double)len, ts->samples); |
||||
// something seems off with the dbm math
|
||||
i1 = 0 + (int)((double)len * crop * 0.5); |
||||
i2 = (len-1) - (int)((double)len * crop * 0.5); |
||||
for (i=i1; i<i2; i++) { |
||||
dbm = (double)ts->avg[i]; |
||||
dbm /= (double)ts->rate; |
||||
dbm /= (double)ts->samples; |
||||
dbm = 10 * log10(dbm); |
||||
fprintf(file, "%.2f, ", dbm); |
||||
} |
||||
dbm = (double)ts->avg[i2] / ((double)ts->rate * (double)ts->samples); |
||||
if (ts->bin_e == 0) { |
||||
dbm = ((double)ts->avg[0] / \
|
||||
((double)ts->rate * (double)ts->samples));} |
||||
dbm = 10 * log10(dbm); |
||||
fprintf(file, "%.2f\n", dbm); |
||||
for (i=0; i<len; i++) { |
||||
ts->avg[i] = 0L; |
||||
} |
||||
ts->samples = 0; |
||||
ts->mega_samples = 0L; |
||||
} |
||||
|
||||
int main(int argc, char **argv) |
||||
{ |
||||
#ifndef _WIN32 |
||||
struct sigaction sigact; |
||||
#endif |
||||
char *filename = NULL; |
||||
int i, length, n_read, r, opt, wb_mode = 0; |
||||
int gain = AUTO_GAIN; // tenths of a dB
|
||||
uint8_t *buffer; |
||||
uint32_t dev_index = 0; |
||||
int device_count; |
||||
int ppm_error = 0; |
||||
int interval = 10; |
||||
int fft_threads = 1; |
||||
int smoothing = 0; |
||||
int single = 0; |
||||
double crop = 0.1; |
||||
char vendor[256], product[256], serial[256]; |
||||
char *freq_optarg; |
||||
time_t next_tick; |
||||
time_t time_now; |
||||
time_t exit_time = 0; |
||||
char t_str[50]; |
||||
struct tm *cal_time; |
||||
double (*window_fn)(int, int) = rectangle; |
||||
|
||||
while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:1h")) != -1) { |
||||
switch (opt) { |
||||
case 'f': // lower:upper:bin_size
|
||||
freq_optarg = strdup(optarg); |
||||
break; |
||||
case 'd': |
||||
dev_index = atoi(optarg); |
||||
break; |
||||
case 'g': |
||||
gain = (int)(atof(optarg) * 10); |
||||
break; |
||||
case 'c': |
||||
crop = atofp(optarg); |
||||
break; |
||||
case 'i': |
||||
interval = (int)round(atoft(optarg)); |
||||
break; |
||||
case 'e': |
||||
exit_time = (time_t)((int)round(atoft(optarg))); |
||||
break; |
||||
case 's': |
||||
if (strcmp("avg", optarg) == 0) { |
||||
smoothing = 0;} |
||||
if (strcmp("iir", optarg) == 0) { |
||||
smoothing = 1;} |
||||
break; |
||||
case 'w': |
||||
if (strcmp("rectangle", optarg) == 0) { |
||||
window_fn = rectangle;} |
||||
if (strcmp("hamming", optarg) == 0) { |
||||
window_fn = hamming;} |
||||
if (strcmp("blackman", optarg) == 0) { |
||||
window_fn = blackman;} |
||||
if (strcmp("blackman-harris", optarg) == 0) { |
||||
window_fn = blackman_harris;} |
||||
if (strcmp("hann-poisson", optarg) == 0) { |
||||
window_fn = hann_poisson;} |
||||
if (strcmp("youssef", optarg) == 0) { |
||||
window_fn = youssef;} |
||||
if (strcmp("kaiser", optarg) == 0) { |
||||
window_fn = kaiser;} |
||||
if (strcmp("bartlett", optarg) == 0) { |
||||
window_fn = bartlett;} |
||||
break; |
||||
case 't': |
||||
fft_threads = atoi(optarg); |
||||
break; |
||||
case 'p': |
||||
ppm_error = atoi(optarg); |
||||
break; |
||||
case '1': |
||||
single = 1; |
||||
break; |
||||
case 'h': |
||||
default: |
||||
usage(); |
||||
break; |
||||
} |
||||
} |
||||
|
||||
frequency_range(freq_optarg, crop); |
||||
|
||||
if (tune_count == 0) { |
||||
usage();} |
||||
|
||||
if (argc <= optind) { |
||||
filename = "-"; |
||||
} else { |
||||
filename = argv[optind]; |
||||
} |
||||
|
||||
if (interval < 1) { |
||||
interval = 1;} |
||||
|
||||
fprintf(stderr, "Reporting every %i seconds\n", interval); |
||||
|
||||
device_count = rtlsdr_get_device_count(); |
||||
if (!device_count) { |
||||
fprintf(stderr, "No supported devices found.\n"); |
||||
exit(1); |
||||
} |
||||
|
||||
fprintf(stderr, "Found %d device(s):\n", device_count); |
||||
for (i = 0; i < device_count; i++) { |
||||
rtlsdr_get_device_usb_strings(i, vendor, product, serial); |
||||
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial); |
||||
} |
||||
fprintf(stderr, "\n"); |
||||
|
||||
fprintf(stderr, "Using device %d: %s\n", |
||||
dev_index, rtlsdr_get_device_name(dev_index)); |
||||
|
||||
r = rtlsdr_open(&dev, dev_index); |
||||
if (r < 0) { |
||||
fprintf(stderr, "Failed to open rtlsdr device #%d.\n", dev_index); |
||||
exit(1); |
||||
} |
||||
#ifndef _WIN32 |
||||
sigact.sa_handler = sighandler; |
||||
sigemptyset(&sigact.sa_mask); |
||||
sigact.sa_flags = 0; |
||||
sigaction(SIGINT, &sigact, NULL); |
||||
sigaction(SIGTERM, &sigact, NULL); |
||||
sigaction(SIGQUIT, &sigact, NULL); |
||||
sigaction(SIGPIPE, &sigact, NULL); |
||||
#else |
||||
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE ); |
||||
#endif |
||||
|
||||
/* Set the tuner gain */ |
||||
if (gain == AUTO_GAIN) { |
||||
r = rtlsdr_set_tuner_gain_mode(dev, 0); |
||||
} else { |
||||
r = rtlsdr_set_tuner_gain_mode(dev, 1); |
||||
gain = nearest_gain(gain); |
||||
r = rtlsdr_set_tuner_gain(dev, gain); |
||||
} |
||||
if (r != 0) { |
||||
fprintf(stderr, "WARNING: Failed to set tuner gain.\n"); |
||||
} else if (gain == AUTO_GAIN) { |
||||
fprintf(stderr, "Tuner gain set to automatic.\n"); |
||||
} else { |
||||
fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0); |
||||
} |
||||
r = rtlsdr_set_freq_correction(dev, ppm_error); |
||||
|
||||
if (strcmp(filename, "-") == 0) { /* Write log to stdout */ |
||||
file = stdout; |
||||
#ifdef _WIN32 |
||||
_setmode(_fileno(file), _O_BINARY); |
||||
#endif |
||||
} else { |
||||
file = fopen(filename, "wb"); |
||||
if (!file) { |
||||
fprintf(stderr, "Failed to open %s\n", filename); |
||||
exit(1); |
||||
} |
||||
} |
||||
|
||||
/* Reset endpoint before we start reading from it (mandatory) */ |
||||
r = rtlsdr_reset_buffer(dev); |
||||
if (r < 0) { |
||||
fprintf(stderr, "WARNING: Failed to reset buffers.\n");} |
||||
|
||||
/* actually do stuff */ |
||||
rtlsdr_set_sample_rate(dev, (uint32_t)tunes[0].rate); |
||||
sine_table(tunes[0].bin_e); |
||||
next_tick = time(NULL) + interval; |
||||
if (exit_time) { |
||||
exit_time = time(NULL) + exit_time;} |
||||
fft_buf = malloc(tunes[0].buf_len * sizeof(int16_t)); |
||||
length = 1 << tunes[0].bin_e; |
||||
window_coefs = malloc(length * sizeof(int)); |
||||
for (i=0; i<length; i++) { |
||||
window_coefs[i] = (int)(256*window_fn(i, length)); |
||||
} |
||||
while (!do_exit) { |
||||
scanner(); |
||||
time_now = time(NULL); |
||||
if (time_now <= next_tick) { |
||||
continue;} |
||||
// time, Hz low, Hz high, Hz step, samples, dbm, dbm, ...
|
||||
cal_time = localtime(&time_now); |
||||
strftime(t_str, 50, "%Y-%m-%d, %H:%M:%S", cal_time); |
||||
for (i=0; i<tune_count; i++) { |
||||
fprintf(file, "%s, ", t_str); |
||||
csv_dbm(&tunes[i], crop); |
||||
} |
||||
fflush(file); |
||||
while (time(NULL) >= next_tick) { |
||||
next_tick += interval;} |
||||
if (single) { |
||||
do_exit = 1;} |
||||
if (exit_time && time(NULL) >= exit_time) { |
||||
do_exit = 1;} |
||||
} |
||||
|
||||
/* clean up */ |
||||
|
||||
if (do_exit) { |
||||
fprintf(stderr, "\nUser cancel, exiting...\n");} |
||||
else { |
||||
fprintf(stderr, "\nLibrary error %d, exiting...\n", r);} |
||||
|
||||
if (file != stdout) { |
||||
fclose(file);} |
||||
|
||||
rtlsdr_close(dev); |
||||
free(fft_buf); |
||||
free(window_coefs); |
||||
//for (i=0; i<tune_count; i++) {
|
||||
// free(tunes[i].avg);
|
||||
// free(tunes[i].buf8);
|
||||
//}
|
||||
return r >= 0 ? r : -r; |
||||
} |
||||
|
||||
// vim: tabstop=8:softtabstop=8:shiftwidth=8:noexpandtab
|
||||
Loading…
Reference in new issue