testing beamforming

executables/nr-ru.c

@@ -756,8 +756,14 @@ void tx_rf(RU_t *ru,int frame,int slot, uint64_t timestamp) {
     }
 
     // the beam index is written in bits 8-10 of the flags
-    // the following choice cycles through the beams every slot, starting with beam 3
-    flags |= ((3+slot)&7)<<8;
+    // beam index>3 will be ignored for now
+    int beam=7;
+    if (slot==0) beam=0;
+    if (slot==10) beam=1;
+    if (slot==20) beam=2;
+    if (slot==40) beam=3;
+
+    flags |= beam<<8;
    
     VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_WRITE_FLAGS, flags ); 
     VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_RU, frame );

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -384,7 +384,7 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
 
   if (is_nr_UL_slot(cc->ServingCellConfigCommon,slot_rxP)) { 
     if (phy_test && slot_rxP==8){
-      nr_schedule_uss_ulsch_phytest(module_idP, frame_rxP, slot_rxP);
+      //nr_schedule_uss_ulsch_phytest(module_idP, frame_rxP, slot_rxP);
     }
   }
 

targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

@@ -285,7 +285,7 @@ static int trx_usrp_start(openair0_device *device) {
   // (we use full duplex here, because our RX is on all the time - this might need to change later)
   s->usrp->set_gpio_attr("FP0", "ATR_XX", (1<<5), 0x7f);
   // set the output pins to 0
-  s->usrp->set_gpio_attr("FP0", "OUT", 3<<7, 0xf80);
+  s->usrp->set_gpio_attr("FP0", "OUT", 7<<7, 0xf80);
 
   // init recv and send streaming
   uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
@@ -482,8 +482,6 @@ static int trx_usrp_write(openair0_device *device,
      last_packet_state  = true;
     }
 
-    // push GPIO bits 7-9 from flags_msb
-    int gpio789=(flags_msb&7)<<7;
     
     s->tx_md.has_time_spec  = true;
     s->tx_md.start_of_burst = (s->tx_count==0) ? true : first_packet_state;
@@ -491,10 +489,14 @@ static int trx_usrp_write(openair0_device *device,
     s->tx_md.time_spec      = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
     s->tx_count++;
 
-    s->usrp->set_command_time(s->tx_md.time_spec);
-    s->usrp->set_gpio_attr("FP0", "OUT", gpio789, 0xfff);
-    s->usrp->clear_command_time();
-    
+    if (flags_msb<4) {
+      // push GPIO bits 7-9 from flags_msb
+      int gpio789=(flags_msb&7)<<7;
+      s->usrp->set_command_time(s->tx_md.time_spec);
+      s->usrp->set_gpio_attr("FP0", "OUT", gpio789, 0x380);
+      s->usrp->clear_command_time();
+    }
+
     if (cc>1) {
       std::vector<void *> buff_ptrs;
 
@@ -502,7 +504,11 @@ static int trx_usrp_write(openair0_device *device,
         buff_ptrs.push_back(&(((int16_t *)buff_tx[i])[0]));
 
       ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md);
-    } else ret = (int)s->tx_stream->send(&(((int16_t *)buff_tx[0])[0]), nsamps, s->tx_md);
+    } 
+    else {
+      ret = (int)s->tx_stream->send(&(((int16_t *)buff_tx[0])[0]), nsamps, s->tx_md);
+    }
+
   if (ret != nsamps) LOG_E(HW,"[xmit] tx samples %d != %d\n",ret,nsamps);
 
   return ret;

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band257.tm1.32PRB.usrpx300.conf

@@ -237,8 +237,8 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-	 sdr_addrs = "type=x300";
-         if_freq = 3000000000;
+	 sdr_addrs = "addr=192.168.10.2,second_addr=192.168.20.2";
+         if_freq = 5300000000;
     }
 );  
 

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf

@@ -237,8 +237,7 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-	 sdr_addrs = "addr=192.168.10.2,mgmt_addr=192.168.10.2";
-         clock_src = "external";
+	 sdr_addrs = "addr=192.168.10.2,second_addr=192.168.20.2";
     }
 );  
 

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.217PRB.usrpn300.conf

@@ -251,8 +251,8 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-	 sdr_addrs = "addr=192.168.10.2,mgmt_addr=192.168.10.2";
-         clock_src = "external";
+	 sdr_addrs = "addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.12.2";
+         #clock_src = "external";
     }
 );