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-rw-r--r--src/common/sdr.c200
1 files changed, 111 insertions, 89 deletions
diff --git a/src/common/sdr.c b/src/common/sdr.c
index e18ef92..d1b53fb 100644
--- a/src/common/sdr.c
+++ b/src/common/sdr.c
@@ -81,7 +81,7 @@ void *sdr_open(const char __attribute__((__unused__)) *audiodev, double *tx_freq
{
sdr_t *sdr;
double bandwidth;
- double tx_center_frequency, rx_center_frequency;
+ double tx_center_frequency = 0.0, rx_center_frequency = 0.0;
int rc;
int c;
@@ -117,103 +117,125 @@ void *sdr_open(const char __attribute__((__unused__)) *audiodev, double *tx_freq
PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
goto error;
}
- for (c = 0; c < channels; c++) {
- PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: TX = %.6f MHz, RX = %.6f MHz\n", c, tx_frequency[c] / 1e6, rx_frequency[c] / 1e6);
- sdr->chan[c].tx_frequency = tx_frequency[c];
- sdr->chan[c].rx_frequency = rx_frequency[c];
- }
- if (sdr->paging_channel) {
- PDEBUG(DSDR, DEBUG_INFO, "Paging Frequency: TX = %.6f MHz\n", paging_frequency / 1e6);
- sdr->chan[sdr->paging_channel].tx_frequency = paging_frequency;
- }
- /* calculate required bandwidth (IQ rate) */
- double tx_low_frequency = sdr->chan[0].tx_frequency, tx_high_frequency = sdr->chan[0].tx_frequency;
- double rx_low_frequency = sdr->chan[0].rx_frequency, rx_high_frequency = sdr->chan[0].rx_frequency;
- double range;
- for (c = 1; c < channels; c++) {
- if (sdr->chan[c].tx_frequency < tx_low_frequency)
- tx_low_frequency = sdr->chan[c].tx_frequency;
- if (sdr->chan[c].tx_frequency > tx_high_frequency)
- tx_high_frequency = sdr->chan[c].tx_frequency;
- if (sdr->chan[c].rx_frequency < rx_low_frequency)
- rx_low_frequency = sdr->chan[c].rx_frequency;
- if (sdr->chan[c].rx_frequency > rx_high_frequency)
- rx_high_frequency = sdr->chan[c].rx_frequency;
- }
- if (sdr->paging_channel) {
- if (sdr->chan[sdr->paging_channel].tx_frequency < tx_low_frequency)
- tx_low_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
- if (sdr->chan[sdr->paging_channel].tx_frequency > tx_high_frequency)
- tx_high_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
- }
- /* range of TX */
- range = tx_high_frequency - tx_low_frequency;
- if (range)
- PDEBUG(DSDR, DEBUG_DEBUG, "Range between all TX Frequencies: %.6f MHz\n", range / 1e6);
- if (range * 2 > sdr->samplerate) {
- // why that? actually i don't know. i just want to be safe....
- PDEBUG(DSDR, DEBUG_NOTICE, "The sample rate must be at least twice the range between frequencies.\n");
- PDEBUG(DSDR, DEBUG_NOTICE, "The given rate is %.6f MHz, but required rate must be >= %.6f MHz\n", sdr->samplerate / 1e6, range * 2.0 / 1e6);
- PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
- goto error;
- }
- tx_center_frequency = (tx_high_frequency + tx_low_frequency) / 2.0;
- /* range of RX */
- range = rx_high_frequency - rx_low_frequency;
- if (range)
- PDEBUG(DSDR, DEBUG_DEBUG, "Range between all RX Frequencies: %.6f MHz\n", range / 1e6);
- if (range * 2.0 > sdr->samplerate) {
- // why that? actually i don't know. i just want to be safe....
- PDEBUG(DSDR, DEBUG_NOTICE, "The sample rate must be at least twice the range between frequencies. Please increment samplerate!\n");
- goto error;
- }
- rx_center_frequency = (rx_high_frequency + rx_low_frequency) / 2.0;
- PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: TX %.6f MHz, RX %.6f\n", tx_center_frequency / 1e6, rx_center_frequency / 1e6);
- /* set offsets to center frequency */
- for (c = 0; c < channels; c++) {
- double tx_offset, rx_offset;
- tx_offset = sdr->chan[c].tx_frequency - tx_center_frequency;
- rx_offset = sdr->chan[c].rx_frequency - rx_center_frequency;
- PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: TX offset: %.6f MHz, RX offset: %.6f MHz\n", c, tx_offset / 1e6, rx_offset / 1e6);
- fm_mod_init(&sdr->chan[c].mod, sdr->samplerate, tx_offset, sdr->amplitude);
- fm_demod_init(&sdr->chan[c].demod, sdr->samplerate, rx_offset, bandwidth);
- }
- if (sdr->paging_channel) {
- double tx_offset;
- tx_offset = sdr->chan[sdr->paging_channel].tx_frequency - tx_center_frequency;
- PDEBUG(DSDR, DEBUG_DEBUG, "Paging Frequency: TX offset: %.6f MHz\n", tx_offset / 1e6);
- fm_mod_init(&sdr->chan[sdr->paging_channel].mod, sdr->samplerate, tx_offset, sdr->amplitude);
- }
- PDEBUG(DSDR, DEBUG_INFO, "Using gain: TX %.1f dB, RX %.1f dB\n", sdr_tx_gain, sdr_rx_gain);
+ if (tx_frequency) {
+ /* calculate required bandwidth (IQ rate) */
+ for (c = 0; c < channels; c++) {
+ PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: TX = %.6f MHz\n", c, tx_frequency[c] / 1e6);
+ sdr->chan[c].tx_frequency = tx_frequency[c];
+ }
+ if (sdr->paging_channel) {
+ PDEBUG(DSDR, DEBUG_INFO, "Paging Frequency: TX = %.6f MHz\n", paging_frequency / 1e6);
+ sdr->chan[sdr->paging_channel].tx_frequency = paging_frequency;
+ }
- if (sdr_write_iq_rx_wave) {
- rc = wave_create_record(&sdr->wave_rx_rec, sdr_write_iq_rx_wave, sdr->samplerate, 2, 1.0);
- if (rc < 0) {
- PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
- goto error;
+ double tx_low_frequency = sdr->chan[0].tx_frequency, tx_high_frequency = sdr->chan[0].tx_frequency;
+ for (c = 1; c < channels; c++) {
+ if (sdr->chan[c].tx_frequency < tx_low_frequency)
+ tx_low_frequency = sdr->chan[c].tx_frequency;
+ if (sdr->chan[c].tx_frequency > tx_high_frequency)
+ tx_high_frequency = sdr->chan[c].tx_frequency;
}
- }
- if (sdr_write_iq_tx_wave) {
- rc = wave_create_record(&sdr->wave_tx_rec, sdr_write_iq_tx_wave, sdr->samplerate, 2, 1.0);
- if (rc < 0) {
- PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
- goto error;
+ if (sdr->paging_channel) {
+ if (sdr->chan[sdr->paging_channel].tx_frequency < tx_low_frequency)
+ tx_low_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
+ if (sdr->chan[sdr->paging_channel].tx_frequency > tx_high_frequency)
+ tx_high_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
}
- }
- if (sdr_read_iq_rx_wave) {
- rc = wave_create_playback(&sdr->wave_rx_play, sdr_read_iq_rx_wave, sdr->samplerate, 2, 1.0);
- if (rc < 0) {
- PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+ /* range of TX */
+ double range = tx_high_frequency - tx_low_frequency;
+ if (range)
+ PDEBUG(DSDR, DEBUG_DEBUG, "Range between all TX Frequencies: %.6f MHz\n", range / 1e6);
+ if (range * 2 > sdr->samplerate) {
+ // why that? actually i don't know. i just want to be safe....
+ PDEBUG(DSDR, DEBUG_NOTICE, "The sample rate must be at least twice the range between frequencies.\n");
+ PDEBUG(DSDR, DEBUG_NOTICE, "The given rate is %.6f MHz, but required rate must be >= %.6f MHz\n", sdr->samplerate / 1e6, range * 2.0 / 1e6);
+ PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
goto error;
}
+ tx_center_frequency = (tx_high_frequency + tx_low_frequency) / 2.0;
+ PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: TX %.6f MHz\n", tx_center_frequency / 1e6);
+ /* set offsets to center frequency */
+ for (c = 0; c < channels; c++) {
+ double tx_offset;
+ tx_offset = sdr->chan[c].tx_frequency - tx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: TX offset: %.6f MHz\n", c, tx_offset / 1e6);
+ fm_mod_init(&sdr->chan[c].mod, sdr->samplerate, tx_offset, sdr->amplitude);
+ }
+ if (sdr->paging_channel) {
+ double tx_offset;
+ tx_offset = sdr->chan[sdr->paging_channel].tx_frequency - tx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Paging Frequency: TX offset: %.6f MHz\n", tx_offset / 1e6);
+ fm_mod_init(&sdr->chan[sdr->paging_channel].mod, sdr->samplerate, tx_offset, sdr->amplitude);
+ }
+ /* show gain */
+ PDEBUG(DSDR, DEBUG_INFO, "Using gain: TX %.1f dB\n", sdr_tx_gain);
+ /* open wave */
+ if (sdr_write_iq_tx_wave) {
+ rc = wave_create_record(&sdr->wave_tx_rec, sdr_write_iq_tx_wave, sdr->samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
+ goto error;
+ }
+ }
+ if (sdr_read_iq_tx_wave) {
+ rc = wave_create_playback(&sdr->wave_tx_play, sdr_read_iq_tx_wave, sdr->samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+ goto error;
+ }
+ }
}
- if (sdr_read_iq_tx_wave) {
- rc = wave_create_playback(&sdr->wave_tx_play, sdr_read_iq_tx_wave, sdr->samplerate, 2, 1.0);
- if (rc < 0) {
- PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+
+ if (rx_frequency) {
+ for (c = 0; c < channels; c++) {
+ PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: RX = %.6f MHz\n", c, rx_frequency[c] / 1e6);
+ sdr->chan[c].rx_frequency = rx_frequency[c];
+ }
+
+ /* calculate required bandwidth (IQ rate) */
+ double rx_low_frequency = sdr->chan[0].rx_frequency, rx_high_frequency = sdr->chan[0].rx_frequency;
+ for (c = 1; c < channels; c++) {
+ if (sdr->chan[c].rx_frequency < rx_low_frequency)
+ rx_low_frequency = sdr->chan[c].rx_frequency;
+ if (sdr->chan[c].rx_frequency > rx_high_frequency)
+ rx_high_frequency = sdr->chan[c].rx_frequency;
+ }
+ /* range of RX */
+ double range = rx_high_frequency - rx_low_frequency;
+ if (range)
+ PDEBUG(DSDR, DEBUG_DEBUG, "Range between all RX Frequencies: %.6f MHz\n", range / 1e6);
+ if (range * 2.0 > sdr->samplerate) {
+ // why that? actually i don't know. i just want to be safe....
+ PDEBUG(DSDR, DEBUG_NOTICE, "The sample rate must be at least twice the range between frequencies. Please increment samplerate!\n");
goto error;
}
+ rx_center_frequency = (rx_high_frequency + rx_low_frequency) / 2.0;
+ PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: RX %.6f MHz\n", rx_center_frequency / 1e6);
+ /* set offsets to center frequency */
+ for (c = 0; c < channels; c++) {
+ double rx_offset;
+ rx_offset = sdr->chan[c].rx_frequency - rx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: RX offset: %.6f MHz\n", c, rx_offset / 1e6);
+ fm_demod_init(&sdr->chan[c].demod, sdr->samplerate, rx_offset, bandwidth);
+ }
+ /* show gain */
+ PDEBUG(DSDR, DEBUG_INFO, "Using gain: RX %.1f dB\n", sdr_rx_gain);
+ /* open wave */
+ if (sdr_write_iq_rx_wave) {
+ rc = wave_create_record(&sdr->wave_rx_rec, sdr_write_iq_rx_wave, sdr->samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
+ goto error;
+ }
+ }
+ if (sdr_read_iq_rx_wave) {
+ rc = wave_create_playback(&sdr->wave_rx_play, sdr_read_iq_rx_wave, sdr->samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+ goto error;
+ }
+ }
}
#ifdef HAVE_UHD
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