sdr: various fixes; use Kaiser filter for resampling
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85663d5304
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3bc1d9625f
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@ -5,6 +5,7 @@
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#include <stdlib.h> //free
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#include <complex.h>
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#include <math.h>
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#include <string.h>
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#include "config.h"
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@ -32,23 +33,23 @@ result_t sdr_init(sdr_ctx_t *ctx)
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ctx->tx_stream = NULL;
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ctx->rx_stream = NULL;
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ctx->interp = firinterp_crcf_create_prototype(LIQUID_FIRFILT_PM, SDR_OVERSAMPLING, 10, 0.2, 0);
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ctx->decim = firdecim_crcf_create_prototype(LIQUID_FIRFILT_PM, SDR_OVERSAMPLING, 10, 0.2, 0);
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ctx->interp = firinterp_crcf_create_kaiser(SDR_OVERSAMPLING, 9, 60.0f);
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ctx->decim = firdecim_crcf_create_kaiser(SDR_OVERSAMPLING, 9, 60.0f);
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ctx->tx_nco = nco_crcf_create(LIQUID_NCO);
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ctx->rx_nco = nco_crcf_create(LIQUID_NCO);
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nco_crcf_set_frequency(ctx->tx_nco, -2 * M_PI * SDR_TX_IF_SHIFT / SDR_TX_SAMPLING_RATE);
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nco_crcf_set_frequency(ctx->rx_nco, -2 * M_PI * SDR_RX_IF_SHIFT / SDR_TX_SAMPLING_RATE);
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nco_crcf_set_frequency(ctx->tx_nco, 2 * M_PI * SDR_TX_IF_SHIFT / SDR_TX_SAMPLING_RATE);
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nco_crcf_set_frequency(ctx->rx_nco, 2 * M_PI * SDR_RX_IF_SHIFT / SDR_RX_SAMPLING_RATE);
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//enumerate devices
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SoapySDRKwargs *results = SoapySDRDevice_enumerate(NULL, &length);
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for (size_t i = 0; i < length; i++)
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{
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fprintf(stderr, "sdr: Found device #%d: ", (int)i);
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fprintf(stderr, "sdr: Found device #%d:\n", (int)i);
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for (size_t j = 0; j < results[i].size; j++)
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{
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fprintf(stderr, "sdr: %s=%s, ", results[i].keys[j], results[i].vals[j]);
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fprintf(stderr, "sdr: - %s=%s\n", results[i].keys[j], results[i].vals[j]);
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}
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fprintf(stderr, "sdr: \n");
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}
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@ -57,6 +58,7 @@ result_t sdr_init(sdr_ctx_t *ctx)
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//create device instance
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//args can be user defined or from the enumeration result
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SoapySDRKwargs args;
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memset(&args, 0, sizeof(args));
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SoapySDRKwargs_set(&args, "driver", "hackrf");
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ctx->sdr = SoapySDRDevice_make(&args);
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SoapySDRKwargs_clear(&args);
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@ -150,7 +152,7 @@ result_t sdr_start_tx(sdr_ctx_t *ctx)
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shutdown_streams(ctx);
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//setup a stream (complex floats)
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ctx->tx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_RX, SOAPY_SDR_CF32, NULL, 0, NULL);
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ctx->tx_stream = SoapySDRDevice_setupStream(ctx->sdr, SOAPY_SDR_TX, SOAPY_SDR_CF32, NULL, 0, NULL);
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if(ctx->tx_stream == NULL) {
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fprintf(stderr, "sdr: setupStream fail: %s\n", SoapySDRDevice_lastError());
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@ -237,7 +239,7 @@ result_t sdr_baseband_to_rf(sdr_ctx_t *ctx,
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for(size_t i = 0; i < nbb; i++) {
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float complex tmp[SDR_OVERSAMPLING];
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firinterp_crcf_execute(ctx->interp, bb_samples[i], tmp);
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firinterp_crcf_execute(ctx->interp, bb_samples[i] / 2.0f, tmp);
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nco_crcf_mix_block_up(ctx->tx_nco,
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tmp,
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