SRSUE: added NR-PDSCH constellation in GUI

srsue/hdr/phy/nr/cc_worker.h

@@ -71,6 +71,8 @@ public:
 
   bool work_dl();
 
+  int read_pdsch_d(cf_t* pdsch_d);
+
 private:
   srslte_dl_slot_cfg_t                dl_slot_cfg = {};
   uint32_t                            cc_idx      = 0;

srsue/hdr/phy/nr/sf_worker.h

@@ -49,6 +49,8 @@ public:
   cf_t*    get_buffer(uint32_t cc_idx, uint32_t antenna_idx);
   uint32_t get_buffer_len();
   void     set_tti(uint32_t tti);
+  int      read_pdsch_d(cf_t* pdsch_d);
+  void     start_plot();
 
 private:
   /* Inherited from thread_pool::worker. Function called every subframe to run the DL/UL processing */

srsue/src/phy/lte/sf_worker.cc

@@ -35,9 +35,9 @@
 #include "srsgui/srsgui.h"
 #include <semaphore.h>
 
-void       init_plots(srsue::lte::sf_worker* worker);
+static void      init_plots(srsue::lte::sf_worker* worker);
-pthread_t  plot_thread;
+static pthread_t plot_thread;
-sem_t      plot_sem;
+static sem_t     plot_sem;
 static int       plot_worker_id = -1;
 #else
 #pragma message "Compiling without srsGUI support"
@@ -332,6 +332,8 @@ float sf_worker::get_cfo()
 #ifdef ENABLE_GUI
 plot_real_t    pce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
 plot_scatter_t pconst;
+plot_scatter_t pconst_nr;
+bool           pconst_nr_ready = false;
 #define SCATTER_PDSCH_BUFFER_LEN (20 * 6 * SRSLTE_SF_LEN_RE(SRSLTE_MAX_PRB, SRSLTE_CP_NORM))
 #define SCATTER_PDSCH_PLOT_LEN 4000
 float tmp_plot[SCATTER_PDSCH_BUFFER_LEN];
@@ -352,7 +354,7 @@ static uint32_t    isync = 0;
 static float       sync_buffer[SYNC_PLOT_LEN];
 #endif /* SYNC_PLOT_LEN > 0 */
 
-void* plot_thread_run(void* arg)
+static void* plot_thread_run(void* arg)
 {
   auto     worker    = (srsue::lte::sf_worker*)arg;
   uint32_t row_count = 0;
@@ -373,11 +375,19 @@ void* plot_thread_run(void* arg)
   row_count = worker->get_rx_nof_antennas();
 
   plot_scatter_init(&pconst);
-  plot_scatter_setTitle(&pconst, (char*)"PDSCH - Equalized Symbols");
+  plot_scatter_setTitle(&pconst, (char*)"LTE - PDSCH - Equalized Symbols");
   plot_scatter_setXAxisScale(&pconst, -4, 4);
   plot_scatter_setYAxisScale(&pconst, -4, 4);
 
-  plot_scatter_addToWindowGrid(&pconst, (char*)"srsue", 0, row_count);
+  plot_scatter_addToWindowGrid(&pconst, (char*)"srsue", 0, row_count++);
+
+  plot_scatter_init(&pconst_nr);
+  plot_scatter_setTitle(&pconst_nr, (char*)"NR - PDSCH - Equalized Symbols");
+  plot_scatter_setXAxisScale(&pconst_nr, -4, 4);
+  plot_scatter_setYAxisScale(&pconst_nr, -4, 4);
+
+  plot_scatter_addToWindowGrid(&pconst_nr, (char*)"srsue", 0, row_count++);
+  pconst_nr_ready = true;
 
 #if CFO_PLOT_LEN > 0
   plot_real_init(&pcfo);

srsue/src/phy/nr/cc_worker.cc

@@ -167,5 +167,12 @@ bool cc_worker::work_dl()
   return true;
 }
 
+int cc_worker::read_pdsch_d(cf_t* pdsch_d)
+{
+  uint32_t nof_re = ue_dl.carrier.nof_prb * SRSLTE_NRE * 12;
+  srslte_vec_cf_copy(pdsch_d, ue_dl.pdsch.d[0], nof_re);
+  return nof_re;
+}
+
 } // namespace nr
 } // namespace srsue

srsue/src/phy/nr/sf_worker.cc

@@ -21,6 +21,18 @@
 
 #include "srsue/hdr/phy/nr/sf_worker.h"
 
+#ifdef ENABLE_GUI
+#include "srsgui/srsgui.h"
+#include <semaphore.h>
+
+static void      init_plots(srsue::nr::sf_worker* worker);
+static pthread_t plot_thread;
+static sem_t     plot_sem;
+static int       plot_worker_id = -1;
+#else
+#pragma message "Compiling without srsGUI support"
+#endif
+
 namespace srsue {
 namespace nr {
 sf_worker::sf_worker(phy_nr_state* phy_state_, srslte::log* log) : phy_state(phy_state_), log_h(log)
@@ -67,7 +79,83 @@ void sf_worker::work_imp()
   for (auto& w : cc_workers) {
     w->work_dl();
   }
+
+  /* Tell the plotting thread to draw the plots */
+#ifdef ENABLE_GUI
+  if ((int)get_id() == plot_worker_id) {
+    sem_post(&plot_sem);
+  }
+#endif
+}
+
+int sf_worker::read_pdsch_d(cf_t* pdsch_d)
+{
+  return cc_workers[0]->read_pdsch_d(pdsch_d);
+}
+
+void sf_worker::start_plot()
+{
+#ifdef ENABLE_GUI
+  if (plot_worker_id == -1) {
+    plot_worker_id = get_id();
+    srslte::console("Starting NR plot for worker_id=%d\n", plot_worker_id);
+    init_plots(this);
+  } else {
+    srslte::console("Trying to start a plot but already started by worker_id=%d\n", plot_worker_id);
+  }
+#else
+  srslte::console("Trying to start a plot but plots are disabled (ENABLE_GUI constant in sf_worker.cc)\n");
+#endif
 }
 
 } // namespace nr
 } // namespace srsue
+
+#ifdef ENABLE_GUI
+extern plot_scatter_t pconst_nr;
+extern bool           pconst_nr_ready;
+#define SCATTER_PDSCH_PLOT_LEN 4000
+static cf_t tmp_pconst_nr[SRSLTE_SF_LEN_RE(SRSLTE_MAX_PRB, SRSLTE_CP_NORM)];
+extern bool plot_quit;
+
+static void* plot_thread_run(void* arg)
+{
+  auto worker = (srsue::nr::sf_worker*)arg;
+  sleep(1);
+  int readed_pdsch_re = 0;
+  while (!plot_quit) {
+    sem_wait(&plot_sem);
+
+    if (readed_pdsch_re < SCATTER_PDSCH_PLOT_LEN) {
+      int n = worker->read_pdsch_d(&tmp_pconst_nr[readed_pdsch_re]);
+      readed_pdsch_re += n;
+    } else {
+      if (readed_pdsch_re > 0 and pconst_nr_ready) {
+        plot_scatter_setNewData(&pconst_nr, tmp_pconst_nr, readed_pdsch_re);
+      }
+      readed_pdsch_re = 0;
+    }
+  }
+  return nullptr;
+}
+
+static void init_plots(srsue::nr::sf_worker* worker)
+{
+  if (sem_init(&plot_sem, 0, 0)) {
+    perror("sem_init");
+    exit(-1);
+  }
+
+  pthread_attr_t     attr;
+  struct sched_param param = {};
+  param.sched_priority     = 0;
+  pthread_attr_init(&attr);
+  pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
+  pthread_attr_setschedpolicy(&attr, SCHED_OTHER);
+  pthread_attr_setschedparam(&attr, &param);
+  if (pthread_create(&plot_thread, &attr, plot_thread_run, worker)) {
+    perror("pthread_create");
+    exit(-1);
+  }
+}
+#endif

srsue/src/phy/phy.cc

@@ -441,6 +441,9 @@ void phy::set_crnti(uint16_t rnti)
 void phy::start_plot()
 {
   lte_workers[0]->start_plot();
+  if (args.nof_nr_carriers > 0) {
+    nr_workers[0]->start_plot();
+  }
 }
 
 void phy::enable_pregen_signals(bool enable)