diff options
Diffstat (limited to 'utils/rtl_fm.c')
| -rw-r--r-- | utils/rtl_fm.c | 41 |
1 files changed, 33 insertions, 8 deletions
diff --git a/utils/rtl_fm.c b/utils/rtl_fm.c index e89e42d..7c84332 100644 --- a/utils/rtl_fm.c +++ b/utils/rtl_fm.c @@ -193,6 +193,7 @@ void usage(void) "\t raw mode outputs 2x16 bit IQ pairs\n" "\t[-s sample_rate (default: 24k)]\n" "\t[-d device_index (default: 0)]\n" + "\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n" "\t[-g tuner_gain (default: automatic)]\n" "\t[-l squelch_level (default: 0/off)]\n" //"\t for fm squelch is inverted\n" @@ -200,11 +201,12 @@ void usage(void) "\t[-p ppm_error (default: 0)]\n" "\t[-E enable_option (default: none)]\n" "\t use multiple -E to enable multiple options\n" - "\t edge: enable lower edge tuning\n" - "\t dc: enable dc blocking filter\n" - "\t deemp: enable de-emphasis filter\n" - "\t direct: enable direct sampling\n" - "\t offset: enable offset tuning\n" + "\t edge: enable lower edge tuning\n" + "\t dc: enable dc blocking filter\n" + "\t deemp: enable de-emphasis filter\n" + "\t direct: enable direct sampling 1 (usually I)\n" + "\t direct2: enable direct sampling 2 (usually Q)\n" + "\t offset: enable offset tuning\n" "\tfilename ('-' means stdout)\n" "\t omitting the filename also uses stdout\n\n" "Experimental options:\n" @@ -502,7 +504,7 @@ int polar_disc_lut(int ar, int aj, int br, int bj) if (x_abs >= atan_lut_size) { /* we can use linear range, but it is not necessary */ - return (cj > 0) ? 1<<13 : -1<<13; + return (cj > 0) ? 1<<13 : -(1<<13); } if (x > 0) { @@ -891,7 +893,7 @@ static void *controller_thread_fn(void *arg) /* set up primary channel */ optimal_settings(s->freqs[0], demod.rate_in); if (dongle.direct_sampling) { - verbose_direct_sampling(dongle.dev, 1);} + verbose_direct_sampling(dongle.dev, dongle.direct_sampling);} if (dongle.offset_tuning) { verbose_offset_tuning(dongle.dev);} @@ -925,8 +927,21 @@ void frequency_range(struct controller_state *s, char *arg) int i; start = arg; stop = strchr(start, ':') + 1; + if (stop == (char *)1) { // no stop or step given + s->freqs[s->freq_len] = (uint32_t) atofs(start); + s->freq_len++; + return; + } stop[-1] = '\0'; step = strchr(stop, ':') + 1; + if (step == (char *)1) { // no step given + s->freqs[s->freq_len] = (uint32_t) atofs(start); + s->freq_len++; + s->freqs[s->freq_len] = (uint32_t) atofs(stop); + s->freq_len++; + stop[-1] = ':'; + return; + } step[-1] = '\0'; for(i=(int)atofs(start); i<=(int)atofs(stop); i+=(int)atofs(step)) { @@ -1042,12 +1057,13 @@ int main(int argc, char **argv) int r, opt; int dev_given = 0; int custom_ppm = 0; + int enable_biastee = 0; dongle_init(&dongle); demod_init(&demod); output_init(&output); controller_init(&controller); - while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:E:F:A:M:h")) != -1) { + while ((opt = getopt(argc, argv, "d:f:g:s:b:l:o:t:r:p:E:F:A:M:hT")) != -1) { switch (opt) { case 'd': dongle.dev_index = verbose_device_search(optarg); @@ -1104,6 +1120,8 @@ int main(int argc, char **argv) demod.deemph = 1;} if (strcmp("direct", optarg) == 0) { dongle.direct_sampling = 1;} + if (strcmp("direct2", optarg) == 0) { + dongle.direct_sampling = 2;} if (strcmp("offset", optarg) == 0) { dongle.offset_tuning = 1;} break; @@ -1142,6 +1160,9 @@ int main(int argc, char **argv) demod.deemph = 1; demod.squelch_level = 0;} break; + case 'T': + enable_biastee = 1; + break; case 'h': default: usage(); @@ -1205,6 +1226,10 @@ int main(int argc, char **argv) verbose_gain_set(dongle.dev, dongle.gain); } + rtlsdr_set_bias_tee(dongle.dev, enable_biastee); + if (enable_biastee) + fprintf(stderr, "activated bias-T on GPIO PIN 0\n"); + verbose_ppm_set(dongle.dev, dongle.ppm_error); if (strcmp(output.filename, "-") == 0) { /* Write samples to stdout */ |