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librtlsdr
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README mods and added extended gain cmd line option to rtl_fsk.c

development
David 2020-09-19 09:11:08 +09:30
parent 78f0cfd90e
commit 89f758437e
2 changed files with 20 additions and 5 deletions
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3
README.md
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@ -4,8 +4,9 @@
# Description
rtl-sdr turns your Realtek RTL2832 based DVB dongle into a SDR receiver
Fork of [librtlsdr](https://github.com/librtlsdr/librtlsdr) for Open VHF/UHF IP link using Pi and RTL-SDR.
Turns your Realtek RTL2832 based DVB dongle into a **FSK** receiver.
# For more information see:

22
src/rtl_fsk.c
View File

@ -105,6 +105,7 @@ void usage(void)
"Usage:\t -f frequency_to_tune_to [Hz]\n"
"\t[-s samplerate (default: %d Hz)]\n"
"\t[-d device_index (default: 0)]\n"
"\t[-e extended gain -e 0xlmi (l,m,i single hex digits 0-f)\n"
"\t[-g gain (default: 0 for auto)]\n"
"\t[-p ppm_error (default: 0)]\n"
"\t[-M modn order (default: 2)]\n"
@ -389,6 +390,8 @@ int main(int argc, char **argv)
int tone_spacing = 100;
int freq_est_mask = 0;
output_bits = 1;
int ext_gain = 0;
int gains_hex, lna_gain, mixer_gain, vga_gain;
while ((opt = getopt(argc, argv, "d:f:g:s:b:n:p:S:u:r:m:c:M:R:xt:")) != -1) {
switch (opt) {
@ -396,6 +399,12 @@ int main(int argc, char **argv)
dev_index = verbose_device_search(optarg);
dev_given = 1;
break;
case 'e':
ext_gain = 1;
gains_hex = (int)strtol(optarg, NULL, 16);
lna_gain = gains_hex >> 8; mixer_gain = (gains_hex >> 4) & 0xf; vga_gain = gains_hex & 0xf;
fprintf(stderr, "lna_gain: %d mixer_gain: %d vga_gain: %d\n", lna_gain, mixer_gain, vga_gain);
break;
case 'f':
frequency = (uint32_t)atofs(optarg);
break;
@ -532,14 +541,19 @@ int main(int argc, char **argv)
/* Set the frequency */
verbose_set_frequency(dev, frequency);
if (0 == gain) {
/* Enable automatic gain */
if (ext_gain == 0) {
if (0 == gain) {
/* Enable automatic gain */
verbose_auto_gain(dev);
} else {
} else {
/* Enable manual gain */
gain = nearest_gain(dev, gain);
verbose_gain_set(dev, gain);
}
}
} else {
fprintf(stderr, "setting extended gain....\n");
rtlsdr_set_tuner_gain_ext(dev, lna_gain, mixer_gain, vga_gain);
}
verbose_ppm_set(dev, ppm_error);