SRSUE: Call Radio tx-end when PHY is reseted and removed redundant attribute is_start_of_burst.

lib/include/srslte/interfaces/common_interfaces.h

@@ -65,6 +65,7 @@ public:
   virtual float             get_tx_gain_offset()                             = 0;
   virtual float             get_rx_gain_offset()                             = 0;
   virtual bool              is_continuous_tx()                               = 0;
+  virtual bool              get_is_start_of_burst(const uint32_t& radio_idx) = 0;
   virtual bool              is_init()                                        = 0;
   virtual void              reset()                                          = 0;
   virtual srslte_rf_info_t* get_info(const uint32_t& radio_idx)              = 0;

lib/include/srslte/radio/radio.h

@@ -92,6 +92,7 @@ class radio {
   bool tx_single(cf_t* buffer, uint32_t nof_samples, srslte_timestamp_t tx_time);
   bool tx(cf_t* buffer[SRSLTE_MAX_PORTS], uint32_t nof_samples, srslte_timestamp_t tx_time);
   void tx_end();
+  bool get_is_start_of_burst();
   bool rx_now(cf_t* buffer[SRSLTE_MAX_PORTS], uint32_t nof_samples, srslte_timestamp_t* rxd_time);
   bool rx_at(cf_t* buffer, uint32_t nof_samples, srslte_timestamp_t rx_time);
 

lib/include/srslte/radio/radio_multi.h

@@ -57,6 +57,10 @@ public:
   bool is_init() override { return radios.at(0)->is_init(); }
   void reset() override { return radios.at(0)->reset(); }
   bool is_continuous_tx() override { return radios.at(0)->is_continuous_tx(); }
+  bool get_is_start_of_burst(const uint32_t& radio_idx) override
+  {
+    return radios.at(radio_idx)->get_is_start_of_burst();
+  }
   bool tx(const uint32_t&           radio_idx,
           cf_t*                     buffer[SRSLTE_MAX_PORTS],
           const uint32_t&           nof_samples,
@@ -64,7 +68,13 @@ public:
   {
     return radios.at(radio_idx)->tx(buffer, nof_samples, tx_time);
   }
-  void tx_end() override { return radios.at(0)->tx_end(); }
+  void tx_end() override
+  {
+    // Send Tx exd to all radios
+    for (auto& r : radios) {
+      r->tx_end();
+    }
+  }
 
   bool rx_now(const uint32_t&     radio_idx,
               cf_t*               buffer[SRSLTE_MAX_PORTS],

lib/src/radio/radio.cc

@@ -255,6 +255,11 @@ void radio::tx_end()
   }
 }
 
+bool radio::get_is_start_of_burst()
+{
+  return is_start_of_burst;
+}
+
 void radio::set_freq_offset(double freq) {
   freq_offset = freq;
 }

srsue/hdr/phy/phy_common.h

@@ -177,7 +177,6 @@ private:
   uint32_t           nof_workers;
   uint32_t           max_workers;
 
-  bool           is_first_of_burst[SRSLTE_MAX_RADIOS];
   srslte::radio_interface_phy* radio_h;
   float          cfo;
   srslte::log*   log_h;

srsue/src/phy/phy_common.cc

@@ -582,10 +582,9 @@ void phy_common::worker_end(uint32_t           tti,
       }
 
       radio_h->tx(i, buffer[i], nof_samples[i], tx_time[i]);
-      is_first_of_burst[i] = false;
     } else {
       if (radio_h->is_continuous_tx()) {
-        if (!is_first_of_burst[i]) {
+        if (!radio_h->get_is_start_of_burst(i)) {
 
           if (ul_channel && !srslte_timestamp_iszero(&tx_time[i])) {
             bzero(zeros_multi[0], sizeof(cf_t) * nof_samples[i]);
@@ -595,10 +594,7 @@ void phy_common::worker_end(uint32_t           tti,
           radio_h->tx(i, zeros_multi, nof_samples[i], tx_time[i]);
         }
       } else {
-        if (!is_first_of_burst[i]) {
         radio_h->tx_end();
-          is_first_of_burst[i] = true;
-        }
       }
     }
   }
@@ -695,8 +691,13 @@ void phy_common::get_sync_metrics(sync_metrics_t m[SRSLTE_MAX_CARRIERS])
 void phy_common::reset_radio()
 {
   is_first_tx = true;
-  for (int i = 0; i < SRSLTE_MAX_RADIOS; i++) {
-    is_first_of_burst[i] = true;
+
+  // End Tx streams even if they are continuous
+  // Since is_first_of_burst is set to true, the radio need to send
+  // end of burst in order to stall correctly the Tx stream.
+  // This is required for UHD version 3.10 and newer.
+  if (radio_h) {
+    radio_h->tx_end();
   }
 }