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sdr: fixed RX sample data conversion

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This commit is contained in:
Thomas Kolb 2024-01-05 13:48:41 +01:00
parent be5fa06950
commit a6f12d876b
1 changed files with 7 additions and 4 deletions
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11
impl/src/sdr/sdr.c
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@ -36,7 +36,7 @@ static int rx_callback(hackrf_transfer *transfer)
for(size_t i = 0; i < nsamples; i++) { for(size_t i = 0; i < nsamples; i++) {
liquid_float_complex sample = liquid_float_complex sample =
0.0078125f * (transfer->buffer[2*i + 0] + I * transfer->buffer[2*i + 1]); 0.0078125f * ((int8_t)transfer->buffer[2*i + 0] + I * (int8_t)transfer->buffer[2*i + 1]);
int result = cbuffercf_push(sdr_ctx->rx_buf, sample); int result = cbuffercf_push(sdr_ctx->rx_buf, sample);
if(result != LIQUID_OK) { if(result != LIQUID_OK) {
@ -158,6 +158,8 @@ static result_t stop_streaming(sdr_ctx_t *ctx)
fsleep(1e-3); fsleep(1e-3);
} }
fsleep(10e-3); // ensure all asynchronous USB communication has stopped
ctx->status = SDR_STATUS_IDLE; ctx->status = SDR_STATUS_IDLE;
return OK; return OK;
@ -221,12 +223,13 @@ result_t sdr_start_rx(sdr_ctx_t *ctx)
{ {
int result; int result;
result = hackrf_set_freq(ctx->hackrf, SDR_RX_FREQ - SDR_RX_IF_SHIFT);
CHECK_HACKRF_RESULT(result, "hackrf_set_freq");
result = hackrf_set_sample_rate(ctx->hackrf, SDR_RX_SAMPLING_RATE); result = hackrf_set_sample_rate(ctx->hackrf, SDR_RX_SAMPLING_RATE);
CHECK_HACKRF_RESULT(result, "hackrf_set_sample_rate"); CHECK_HACKRF_RESULT(result, "hackrf_set_sample_rate");
result = hackrf_set_freq(ctx->hackrf, SDR_RX_FREQ - SDR_RX_IF_SHIFT);
fprintf(stderr, "Set RX frequency to %f Hz.\n", SDR_RX_FREQ - SDR_RX_IF_SHIFT);
CHECK_HACKRF_RESULT(result, "hackrf_set_freq");
result = hackrf_set_lna_gain(ctx->hackrf, SDR_GAIN_RX_LNA); result = hackrf_set_lna_gain(ctx->hackrf, SDR_GAIN_RX_LNA);
CHECK_HACKRF_RESULT(result, "hackrf_set_lna_gain"); CHECK_HACKRF_RESULT(result, "hackrf_set_lna_gain");