diff options
Diffstat (limited to 'utils/rtl_adsb.c')
| -rw-r--r-- | utils/rtl_adsb.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/utils/rtl_adsb.c b/utils/rtl_adsb.c index 7de9204..7aea8dd 100644 --- a/utils/rtl_adsb.c +++ b/utils/rtl_adsb.c @@ -96,6 +96,7 @@ void usage(void) "\t[-e allowed_errors (default: 5)]\n" "\t[-g tuner_gain (default: automatic)]\n" "\t[-p ppm_error (default: 0)]\n" + "\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n" "\tfilename (a '-' dumps samples to stdout)\n" "\t (omitting the filename also uses stdout)\n\n" "Streaming with netcat:\n" @@ -182,7 +183,7 @@ int magnitute(uint8_t *buf, int len) return len/2; } -uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d) +static inline uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d) /* takes 4 consecutive real samples, return 0 or 1, BADSAMPLE on error */ { int bit, bit_p; @@ -223,17 +224,17 @@ uint16_t single_manchester(uint16_t a, uint16_t b, uint16_t c, uint16_t d) return BADSAMPLE; } -inline uint16_t min16(uint16_t a, uint16_t b) +static inline uint16_t min16(uint16_t a, uint16_t b) { return a<b ? a : b; } -inline uint16_t max16(uint16_t a, uint16_t b) +static inline uint16_t max16(uint16_t a, uint16_t b) { return a>b ? a : b; } -int preamble(uint16_t *buf, int i) +static inline int preamble(uint16_t *buf, int i) /* returns 0/1 for preamble at index i */ { int i2; @@ -371,11 +372,12 @@ int main(int argc, char **argv) int dev_index = 0; int dev_given = 0; int ppm_error = 0; + int enable_biastee = 0; pthread_cond_init(&ready, NULL); pthread_mutex_init(&ready_m, NULL); squares_precompute(); - while ((opt = getopt(argc, argv, "d:g:p:e:Q:VS")) != -1) + while ((opt = getopt(argc, argv, "d:g:p:e:Q:VST")) != -1) { switch (opt) { case 'd': @@ -400,6 +402,9 @@ int main(int argc, char **argv) case 'Q': quality = (int)(atof(optarg) * 10); break; + case 'T': + enable_biastee = 1; + break; default: usage(); return 0; @@ -470,6 +475,10 @@ int main(int argc, char **argv) /* Set the sample rate */ verbose_set_sample_rate(dev, ADSB_RATE); + rtlsdr_set_bias_tee(dev, enable_biastee); + if (enable_biastee) + fprintf(stderr, "activated bias-T on GPIO PIN 0\n"); + /* Reset endpoint before we start reading from it (mandatory) */ verbose_reset_buffer(dev); @@ -483,6 +492,8 @@ int main(int argc, char **argv) else { fprintf(stderr, "\nLibrary error %d, exiting...\n", r);} rtlsdr_cancel_async(dev); + pthread_cancel(demod_thread); + pthread_join(demod_thread, NULL); pthread_cond_destroy(&ready); pthread_mutex_destroy(&ready_m); |