diff options
Diffstat (limited to 'utils/rtl_power.c')
| -rw-r--r-- | utils/rtl_power.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/utils/rtl_power.c b/utils/rtl_power.c index 23b516c..6204de2 100644 --- a/utils/rtl_power.c +++ b/utils/rtl_power.c @@ -133,6 +133,7 @@ void usage(void) "\t[-d device_index (default: 0)]\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" @@ -249,7 +250,7 @@ void sine_table(int size) } } -int16_t FIX_MPY(int16_t a, int16_t b) +static inline int16_t FIX_MPY(int16_t a, int16_t b) /* fixed point multiply and scale */ { int c = ((int)a * (int)b) >> 14; @@ -436,8 +437,16 @@ void frequency_range(char *arg, double crop) /* hacky string parsing */ start = arg; stop = strchr(start, ':') + 1; + if (stop == (char *)1) { + fprintf(stderr, "Bad frequency range specification: %s\n", arg); + exit(1); + } stop[-1] = '\0'; step = strchr(stop, ':') + 1; + if (step == (char *)1) { + fprintf(stderr, "Bad frequency range specification: %s\n", arg); + exit(1); + } step[-1] = '\0'; lower = (int)atofs(start); upper = (int)atofs(stop); @@ -771,6 +780,7 @@ int main(int argc, char **argv) int single = 0; int direct_sampling = 0; int offset_tuning = 0; + int enable_biastee = 0; double crop = 0.0; char *freq_optarg; time_t next_tick; @@ -781,7 +791,7 @@ int main(int argc, char **argv) double (*window_fn)(int, int) = rectangle; freq_optarg = ""; - while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:F:1PDOh")) != -1) { + while ((opt = getopt(argc, argv, "f:i:s:t:d:g:p:e:w:c:F:1PDOhT")) != -1) { switch (opt) { case 'f': // lower:upper:bin_size freq_optarg = strdup(optarg); @@ -849,6 +859,9 @@ int main(int argc, char **argv) boxcar = 0; comp_fir_size = atoi(optarg); break; + case 'T': + enable_biastee = 1; + break; case 'h': default: usage(); @@ -925,6 +938,10 @@ int main(int argc, char **argv) verbose_ppm_set(dev, ppm_error); + rtlsdr_set_bias_tee(dev, enable_biastee); + if (enable_biastee) + fprintf(stderr, "activated bias-T on GPIO PIN 0\n"); + if (strcmp(filename, "-") == 0) { /* Write log to stdout */ file = stdout; #ifdef _WIN32 |