int rf_rssi_scan(srslte_rf_t *rf, float *freqs, float *rssi, int nof_bands, double fs, int nsamp) {
int i, j;
int ret = -1;
cf_t *buffer;
double f;
buffer = calloc(nsamp, sizeof(cf_t));
if (!buffer) {
goto free_and_exit;
}
srslte_rf_set_rx_gain(rf, 20.0);
srslte_rf_set_rx_srate(rf, fs);
for (i=0;i<nof_bands;i++) {
srslte_rf_stop_rx_stream(rf);
f = (double) freqs[i];
srslte_rf_set_rx_freq(rf, f);
srslte_rf_rx_wait_lo_locked(rf);
usleep(10000);
srslte_rf_start_rx_stream(rf, false);
/* discard first samples */
for (j=0;j<2;j++) {
if (srslte_rf_recv(rf, buffer, nsamp, 1) != nsamp) {
goto free_and_exit;
}
}
rssi[i] = srslte_vec_avg_power_cf(buffer, nsamp);
printf("[%3d]: Freq %4.1f Mhz - RSSI: %3.2f dBm\r", i, f/1000000, 10*log10f(rssi[i]) + 30); fflush(stdout);
if (SRSLTE_VERBOSE_ISINFO()) {
printf("\n");
}
}
srslte_rf_stop_rx_stream(rf);
ret = 0;
free_and_exit:
free(buffer);
return ret;
}
int srslte_rf_recv_wrapper(void *h, void *data, uint32_t nsamples, srslte_timestamp_t *q) {
DEBUG(" ---- Receive %d samples ---- \n", nsamples);
return srslte_rf_recv(h, data, nsamples, 1);
}
