Frequency hopping
"-f" can be given multiple times, e.g. "-f 433761931 -f 868198412". After 2 successfull decodings or 10 minutes, whichever happens earlier, the program tunes to the next frequency. This way, both ISM bands can be decoded with 1 stick.
This commit is contained in:
Sven Killig
parent
7f2491b391
commit
1439fd3fba
1 changed files with 43 additions and 16 deletions
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@ -61,6 +61,7 @@
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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 <time.h>
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#ifndef _WIN32
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#include <unistd.h>
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@ -88,6 +89,10 @@
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#define BITBUF_ROWS 15
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static int do_exit = 0;
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static int do_exit_async=0, frequencies=0, events=0;
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uint32_t frequency[MAX_PROTOCOLS];
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time_t rawtime_old;
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int flag;
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uint32_t samp_rate=DEFAULT_SAMPLE_RATE;
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static uint32_t bytes_to_read = 0;
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static rtlsdr_dev_t *dev = NULL;
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@ -533,13 +538,13 @@ struct dm_state {
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void usage(void)
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{
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fprintf(stderr,
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"rtl_433, a 433.92MHz generic data receiver for RTL2832 based DVB-T receivers\n\n"
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"rtl_433, an ISM band generic data receiver for RTL2832 based DVB-T receivers\n\n"
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"Usage:\t[-d device_index (default: 0)]\n"
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"\t[-g gain (default: 0 for auto)]\n"
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"\t[-a analyze mode, print a textual description of the signal]\n"
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"\t[-t signal auto save, use it together with analyze mode (-a -t)\n"
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"\t[-l change the detection level used to determine pulses (0-3200) default: %i]\n"
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"\t[-f change the receive frequency, default: %i Hz]\n"
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"\t[-f [-f...] receive frequency[s], default: %i Hz]\n"
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"\t[-s samplerate (default: %i Hz)]\n"
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"\t[-S force sync output (default: async)]\n"
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"\t[-r read data from file instead of from a receiver]\n"
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@ -801,7 +806,7 @@ static void pwm_d_decode(struct dm_state *demod, struct protocol_state* p, int16
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p->sample_counter = 0;
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p->pulse_distance = 0;
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if (p->callback)
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p->callback(p->bits_buffer);
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events+=p->callback(p->bits_buffer);
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else
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demod_print_bits_packet(p);
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@ -867,7 +872,7 @@ static void pwm_p_decode(struct dm_state *demod, struct protocol_state* p, int16
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p->sample_counter = 0;
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//demod_print_bits_packet(p);
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if (p->callback)
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p->callback(p->bits_buffer);
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events+=p->callback(p->bits_buffer);
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else
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demod_print_bits_packet(p);
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demod_reset_bits_packet(p);
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@ -922,7 +927,7 @@ static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
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uint16_t* sbuf = (uint16_t*) buf;
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int i;
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if (demod->file || !demod->save_data) {
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if (do_exit)
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if (do_exit || do_exit_async)
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return;
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if ((bytes_to_read > 0) && (bytes_to_read < len)) {
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@ -973,6 +978,17 @@ static void rtlsdr_callback(unsigned char *buf, uint32_t len, void *ctx)
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if (bytes_to_read > 0)
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bytes_to_read -= len;
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if(frequencies>1) {
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time_t rawtime;
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time(&rawtime);
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if(difftime(rawtime, rawtime_old)>60*10 || events>=2) {
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rawtime_old=rawtime;
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events=0;
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do_exit_async=1;
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rtlsdr_cancel_async(dev);
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}
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}
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}
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}
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@ -992,7 +1008,7 @@ int main(int argc, char **argv)
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struct dm_state* demod;
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uint8_t *buffer;
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uint32_t dev_index = 0;
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uint32_t frequency = DEFAULT_FREQUENCY;
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int frequency_current=0;
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uint32_t out_block_size = DEFAULT_BUF_LENGTH;
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int device_count;
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char vendor[256], product[256], serial[256];
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@ -1014,7 +1030,8 @@ int main(int argc, char **argv)
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dev_index = atoi(optarg);
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break;
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case 'f':
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frequency = (uint32_t)atof(optarg);
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if(frequencies<MAX_PROTOCOLS) frequency[frequencies++] = (uint32_t)atof(optarg);
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else fprintf(stderr, "Max number of frequencies reached %d\n",MAX_PROTOCOLS);
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break;
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case 'g':
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gain = (int)(atof(optarg) * 10); /* tenths of a dB */
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@ -1134,13 +1151,6 @@ int main(int argc, char **argv)
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fprintf(stderr, "Sample rate decimation set to %d. %d->%d\n",demod->decimation_level, samp_rate, samp_rate>>demod->decimation_level);
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fprintf(stderr, "Bit detection level set to %d.\n", demod->level_limit);
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/* Set the frequency */
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r = rtlsdr_set_center_freq(dev, frequency);
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if (r < 0)
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fprintf(stderr, "WARNING: Failed to set center freq.\n");
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else
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fprintf(stderr, "Tuned to %u Hz.\n", frequency);
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if (0 == gain) {
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/* Enable automatic gain */
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r = rtlsdr_set_tuner_gain_mode(dev, 0);
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@ -1232,9 +1242,26 @@ int main(int argc, char **argv)
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bytes_to_read -= n_read;
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}
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} else {
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if(frequencies==0) {
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frequency[0] = DEFAULT_FREQUENCY;
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frequencies=1;
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} else {
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time(&rawtime_old);
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}
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fprintf(stderr, "Reading samples in async mode...\n");
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r = rtlsdr_read_async(dev, rtlsdr_callback, (void *)demod,
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DEFAULT_ASYNC_BUF_NUMBER, out_block_size);
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while(!do_exit) {
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/* Set the frequency */
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r = rtlsdr_set_center_freq(dev, frequency[frequency_current]);
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if (r < 0)
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fprintf(stderr, "WARNING: Failed to set center freq.\n");
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else
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fprintf(stderr, "Tuned to %u Hz.\n", rtlsdr_get_center_freq(dev));
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r = rtlsdr_read_async(dev, rtlsdr_callback, (void *)demod,
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DEFAULT_ASYNC_BUF_NUMBER, out_block_size);
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do_exit_async=0;
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frequency_current++;
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if(frequency_current>frequencies-1) frequency_current=0;
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}
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}
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if (do_exit)
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