diff options
| author | Jiří Pinkava <j-pi@seznam.cz> | 2015-03-17 13:21:09 +0100 |
|---|---|---|
| committer | Steve Markgraf <steve@steve-m.de> | 2015-05-16 00:38:01 +0200 |
| commit | 92df068dc5acae9e671eefe1f80626319819c52b (patch) | |
| tree | 8a8df5c05b8c237c2d97dbd9807da6b582c21af5 /src/librtlsdr.c | |
| parent | d892279085491f9c610388da89bc701ef6ac632c (diff) | |
New functions rtlsdr_set_tuner_bandwidth()
Signed-off-by: Steve Markgraf <steve@steve-m.de>
Diffstat (limited to 'src/librtlsdr.c')
| -rw-r--r-- | src/librtlsdr.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/src/librtlsdr.c b/src/librtlsdr.c index 0ee4123..0650606 100644 --- a/src/librtlsdr.c +++ b/src/librtlsdr.c @@ -113,6 +113,7 @@ struct rtlsdr_dev { rtlsdr_tuner_iface_t *tuner; uint32_t tun_xtal; /* Hz */ uint32_t freq; /* Hz */ + uint32_t bw; uint32_t offs_freq; /* Hz */ int corr; /* ppm */ int gain; /* tenth dB */ @@ -1008,6 +1009,24 @@ int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains) } } +int rtlsdr_set_tuner_bandwidth(rtlsdr_dev_t *dev, uint32_t bw) +{ + int r = 0; + + if (!dev || !dev->tuner) + return -1; + + if (dev->tuner->set_bw) { + rtlsdr_set_i2c_repeater(dev, 1); + r = dev->tuner->set_bw(dev, bw > 0 ? bw : dev->rate); + rtlsdr_set_i2c_repeater(dev, 0); + if (r) + return r; + dev->bw = bw; + } + return r; +} + int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain) { int r = 0; @@ -1095,14 +1114,14 @@ int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate) if ( ((double)samp_rate) != real_rate ) fprintf(stderr, "Exact sample rate is: %f Hz\n", real_rate); + dev->rate = (uint32_t)real_rate; + if (dev->tuner && dev->tuner->set_bw) { rtlsdr_set_i2c_repeater(dev, 1); - dev->tuner->set_bw(dev, (int)real_rate); + dev->tuner->set_bw(dev, dev->bw > 0 ? dev->bw : dev->rate); rtlsdr_set_i2c_repeater(dev, 0); } - dev->rate = (uint32_t)real_rate; - tmp = (rsamp_ratio >> 16); r |= rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2); tmp = rsamp_ratio & 0xffff; @@ -1219,6 +1238,7 @@ int rtlsdr_get_direct_sampling(rtlsdr_dev_t *dev) int rtlsdr_set_offset_tuning(rtlsdr_dev_t *dev, int on) { int r = 0; + int bw; if (!dev) return -1; @@ -1236,7 +1256,14 @@ int rtlsdr_set_offset_tuning(rtlsdr_dev_t *dev, int on) if (dev->tuner && dev->tuner->set_bw) { rtlsdr_set_i2c_repeater(dev, 1); - dev->tuner->set_bw(dev, on ? (2 * dev->offs_freq) : dev->rate); + if (on) { + bw = 2 * dev->offs_freq; + } else if (dev->bw > 0) { + bw = dev->bw; + } else { + bw = dev->rate; + } + dev->tuner->set_bw(dev, bw); rtlsdr_set_i2c_repeater(dev, 0); } |