mirror of https://github.com/PentHertz/srsLTE.git
Added MIB decoding to pdsch_ue file mode. usrp_capture_sync captures entires frames
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7b86cd030d
commit
86625ecc95
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@ -302,18 +302,12 @@ int main(int argc, char **argv) {
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INFO("Stopping UHD and flushing buffer...\r",0);
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cuhd_stop_rx_stream(uhd);
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cuhd_flush_buffer(uhd);
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if (srslte_ue_mib_init(&ue_mib, cell)) {
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fprintf(stderr, "Error initaiting UE MIB decoder\n");
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exit(-1);
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}
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cuhd_flush_buffer(uhd);
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}
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#endif
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/* If reading from file, go straight to PDSCH decoding. Otherwise, decode MIB first */
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if (prog_args.input_file_name) {
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state = DECODE_PDSCH;
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/* preset cell configuration */
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cell.id = prog_args.file_cell_id;
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cell.cp = SRSLTE_CP_NORM;
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@ -329,7 +323,6 @@ int main(int argc, char **argv) {
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} else {
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#ifndef DISABLE_UHD
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state = DECODE_MIB;
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if (srslte_ue_sync_init(&ue_sync, cell, cuhd_recv_wrapper, uhd)) {
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fprintf(stderr, "Error initiating ue_sync\n");
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exit(-1);
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@ -337,6 +330,13 @@ int main(int argc, char **argv) {
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#endif
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}
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state = DECODE_MIB;
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if (srslte_ue_mib_init(&ue_mib, cell)) {
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fprintf(stderr, "Error initaiting UE MIB decoder\n");
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exit(-1);
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}
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if (srslte_ue_dl_init(&ue_dl, cell)) { // This is the User RNTI
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fprintf(stderr, "Error initiating UE downlink processing module\n");
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exit(-1);
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@ -501,6 +501,8 @@ int main(int argc, char **argv) {
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sf_cnt++;
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} // Main loop
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pthread_cancel(plot_thread);
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pthread_join(plot_thread, NULL);
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srslte_ue_dl_free(&ue_dl);
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srslte_ue_sync_free(&ue_sync);
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@ -42,7 +42,7 @@
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static bool keep_running = true;
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char *output_file_name = NULL;
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char *uhd_args="";
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float uhd_gain=40.0, uhd_freq=-1.0;
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float uhd_gain=60.0, uhd_freq=-1.0;
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int nof_prb = 6;
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int nof_subframes = -1;
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int N_id_2 = -1;
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@ -57,7 +57,7 @@ void usage(char *prog) {
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printf("\t-g UHD Gain [Default %.2f dB]\n", uhd_gain);
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printf("\t-p nof_prb [Default %d]\n", nof_prb);
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printf("\t-n nof_subframes [Default %d]\n", nof_subframes);
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printf("\t-v srslte_verbose\n");
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printf("\t-v verbose\n");
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}
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void parse_args(int argc, char **argv) {
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@ -104,25 +104,18 @@ int cuhd_recv_wrapper(void *h, void *data, uint32_t nsamples, srslte_timestamp_t
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return cuhd_recv(h, data, nsamples, 1);
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}
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enum receiver_state { DECODE_MIB, SAVE_FILE} state;
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int main(int argc, char **argv) {
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cf_t *buffer;
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int subframe_count, n;
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int n;
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void *uhd;
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srslte_filesink_t sink;
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srslte_ue_mib_t ue_mib;
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srslte_ue_sync_t ue_sync;
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srslte_cell_t cell;
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enum receiver_state state;
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uint8_t bch_payload[BCH_PAYLOAD_LEN];
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signal(SIGINT, int_handler);
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parse_args(argc, argv);
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subframe_count = 0;
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srslte_filesink_init(&sink, output_file_name, SRSLTE_COMPLEX_FLOAT_BIN);
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printf("Opening UHD device...\n");
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@ -145,17 +138,12 @@ int main(int argc, char **argv) {
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fprintf(stderr, "Error initiating ue_sync\n");
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exit(-1);
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}
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if (srslte_ue_mib_init(&ue_mib, cell)) {
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fprintf(stderr, "Error initaiting UE MIB decoder\n");
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exit(-1);
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}
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state = DECODE_MIB;
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bool decoded_mib = false;
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uint32_t sfn, sfn_offset;
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printf("Waiting for SFN=0\n");
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uint32_t subframe_count = 0;
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bool start_capture = false;
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bool stop_capture = false;
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while((subframe_count < nof_subframes || nof_subframes == -1)
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&& keep_running)
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&& !stop_capture)
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{
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n = srslte_ue_sync_get_buffer(&ue_sync, &buffer);
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if (n < 0) {
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@ -163,39 +151,20 @@ int main(int argc, char **argv) {
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exit(-1);
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}
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if (n == 1) {
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switch (state) {
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case DECODE_MIB:
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if (srslte_ue_sync_get_sfidx(&ue_sync) == 0) {
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srslte_pbch_decode_reset(&ue_mib.pbch);
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n = srslte_ue_mib_decode(&ue_mib, buffer, bch_payload, NULL, &sfn_offset);
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if (n < 0) {
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fprintf(stderr, "Error decoding UE MIB\n");
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exit(-1);
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} else if (n == SRSLTE_UE_MIB_FOUND) {
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srslte_pbch_mib_unpack(bch_payload, &cell, &sfn);
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sfn = (sfn + sfn_offset)%1024;
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decoded_mib = true;
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}
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}
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if (decoded_mib && srslte_ue_sync_get_sfidx(&ue_sync) == 9 && sfn == 1023) {
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srslte_pbch_mib_fprint(stdout, &cell, sfn, cell.id);
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printf("Decoded MIB. SFN: %d\n", sfn);
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state = SAVE_FILE;
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}
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break;
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case SAVE_FILE:
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printf("Writing to file %4d subframes...\r", subframe_count);
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srslte_filesink_write(&sink, buffer, SRSLTE_SF_LEN_PRB(nof_prb));
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subframe_count++;
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break;
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if (!start_capture) {
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if (srslte_ue_sync_get_sfidx(&ue_sync) == 9) {
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start_capture = true;
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}
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} else {
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printf("Writing to file %6d subframes...\r", subframe_count);
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srslte_filesink_write(&sink, buffer, SRSLTE_SF_LEN_PRB(nof_prb));
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subframe_count++;
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}
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}
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if (!keep_running) {
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if (!start_capture || (start_capture && srslte_ue_sync_get_sfidx(&ue_sync) == 9)) {
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stop_capture = true;
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}
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if (srslte_ue_sync_get_sfidx(&ue_sync) == 9) {
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sfn++;
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if (sfn == 1024) {
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sfn = 0;
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}
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}
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}
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}
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