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Add bitpacking to airspy receiver #30

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Add bitpacking to airspy receiver #30

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6425b7e
Always try to enable packed airspy sample transfers.
Jan 13, 2024
47a8793
Cosmetic changes. Clarified bias-tee and mixer error log messages.
Jan 13, 2024
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14 changes: 10 additions & 4 deletions multifm/airspy_if.c
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Original file line number Diff line number Diff line change
Expand Up @@ -190,6 +190,11 @@ aresult_t airspy_worker_thread_new(struct receiver **pthr, struct config *cfg)
}
}

/* Enable packed sample transfers. */
if (0 != airspy_set_packing(dev, 1)) {
MFM_MSG(SEV_WARNING, "FAILED-BIT-PACKING", "Request for packed sample transfers failed, continuing.");
}

/* Set the sample rate, as requested */
if (0 != airspy_set_samplerate(dev, sample_rate)) {
MFM_MSG(SEV_FATAL, "BAD-SAMPLE-RATE", "Unable to set sampling rate to %d Hz, aborting.",
Expand All @@ -208,28 +213,29 @@ aresult_t airspy_worker_thread_new(struct receiver **pthr, struct config *cfg)

/* Set the LNA gain */
if (0 != airspy_set_lna_gain(dev, lna_gain)) {
MFM_MSG(SEV_FATAL, "BAD-LNA-GAIN", "LNA gain value of %d dB is invalid, aborting", lna_gain);
MFM_MSG(SEV_FATAL, "BAD-LNA-GAIN", "LNA gain setting %d is invalid, aborting", lna_gain);
ret = A_E_INVAL;
goto done;
}

/* Set the VGA gain */
if (0 != airspy_set_vga_gain(dev, vga_gain)) {
MFM_MSG(SEV_FATAL, "BAD-VGA-GAIN", "VGA gain value of %d dB is invalid, aborting", vga_gain);
MFM_MSG(SEV_FATAL, "BAD-VGA-GAIN", "VGA gain setting %d is invalid, aborting", vga_gain);
ret = A_E_INVAL;
goto done;
}

/* Set the Mixer gain */
if (0 != airspy_set_mixer_gain(dev, mixer_gain)) {
MFM_MSG(SEV_FATAL, "BAD-MIXER-GAIN", "Mixer gain value of %d dB is invalid, aborting", mixer_gain);
MFM_MSG(SEV_FATAL, "BAD-MIXER-GAIN", "Mixer gain setting %d is invalid, aborting", mixer_gain);
ret = A_E_INVAL;
goto done;
}

/* Enable the Bias Tee if we were asked to do so */
if (0 != airspy_set_rf_bias(dev, (true == bias_t) ? 1 : 0)) {
MFM_MSG(SEV_WARNING, "FAILED-ENABLE-BIAS", "Failed to enable Bias Tee for powering an outside device.");
MFM_MSG(SEV_WARNING, "FAILED-ENABLE-BIAS", "Failed to %sable Bias Tee for powering an outside device.",
(true == bias_t) ? "en" : "dis");
}

/* Create the device object */
Expand Down