Exposed continuous TX mode to ue.conf

lib/include/srslte/radio/radio.h

@@ -44,13 +44,11 @@ typedef struct {
   float rx_corr_iq_q;
 } rf_cal_t;
 
-
 namespace srslte {
 
 /* Interface to the RF frontend. 
   */
-  class radio
-  {
+class radio {
  public:
   radio() : tr_local_time(1024 * 10), tr_usrp_time(1024 * 10), tr_tx_time(1024 * 10), tr_is_eob(1024 * 10) {
     bzero(&rf_device, sizeof(srslte_rf_t));
@@ -74,6 +72,7 @@ namespace srslte {
     agc_enabled = false;
     radio_is_streaming = false;
     is_initialized = false;
+    continuous_tx = false;
   };
 
   bool init(char *args = NULL, char *devname = NULL, uint32_t nof_channels = 1);
@@ -87,6 +86,9 @@ namespace srslte {
 
   void set_manual_calibration(rf_cal_t *calibration);
 
+  bool is_continuous_tx();
+  void set_continuous_tx(bool enable);
+
   void get_time(srslte_timestamp_t *now);
   bool tx_single(void *buffer, uint32_t nof_samples, srslte_timestamp_t tx_time);
   bool tx(void *buffer[SRSLTE_MAX_PORTS], uint32_t nof_samples, srslte_timestamp_t tx_time);
@@ -136,7 +138,6 @@ namespace srslte {
 
   srslte_rf_t rf_device;
 
-      
   const static uint32_t burst_preamble_max_samples = 30720000;  // 30.72 MHz is maximum frequency
   double burst_preamble_sec;// Start of burst preamble time (off->on RF transition time)
   srslte_timestamp_t end_of_burst_time;
@@ -170,7 +171,8 @@ namespace srslte {
   uint32_t tti;
   bool agc_enabled;
 
-      bool is_initialized = true;;
+  bool continuous_tx;
+  bool is_initialized;
   bool radio_is_streaming;
 
   uint32_t saved_nof_channels;

lib/src/radio/radio.cc

@@ -51,11 +51,13 @@ bool radio::init(char *args, char *devname, uint32_t nof_channels)
   // Suppress radio stdout
   srslte_rf_suppress_stdout(&rf_device);
 
+  continuous_tx = false;
   tx_adv_auto = true;
   // Set default preamble length each known device
   // We distinguish by device family, maybe we should calibrate per device
   if (strstr(srslte_rf_name(&rf_device), "uhd")) {
     burst_preamble_sec = uhd_default_burst_preamble_sec;
+    continuous_tx = true;
   } else if (strstr(srslte_rf_name(&rf_device), "bladerf")) {
     burst_preamble_sec = blade_default_burst_preamble_sec;
   } else {
@@ -111,6 +113,14 @@ void radio::set_burst_preamble(double preamble_us)
   burst_preamble_sec = (double) preamble_us/1e6; 
 }
 
+void radio::set_continuous_tx(bool enable) {
+  continuous_tx = enable;
+}
+
+bool radio::is_continuous_tx() {
+  return continuous_tx;
+}
+
 void radio::set_tx_adv(int nsamples)
 {
   tx_adv_auto = false;

srsue/hdr/phy/phch_common.h

@@ -27,9 +27,6 @@
 #ifndef SRSUE_PHCH_COMMON_H
 #define SRSUE_PHCH_COMMON_H
 
-#define TX_MODE_CONTINUOUS 1
-
-
 #include <pthread.h>
 #include <string.h>
 #include <vector>

srsue/hdr/ue_base.h

@@ -64,6 +64,7 @@ typedef struct {
   std::string   device_args;
   std::string   time_adv_nsamples;
   std::string   burst_preamble;
+  std::string   continuous_tx;
 }rf_args_t;
 
 typedef struct {

srsue/src/main.cc

@@ -77,6 +77,7 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
     ("rf.time_adv_nsamples", bpo::value<string>(&args->rf.time_adv_nsamples)->default_value("auto"),
      "Transmission time advance")
     ("rf.burst_preamble_us", bpo::value<string>(&args->rf.burst_preamble)->default_value("auto"), "Transmission time advance")
+    ("rf.continuous_tx", bpo::value<string>(&args->rf.continuous_tx)->default_value("auto"), "Transmit samples continuously to the radio or on bursts (auto/yes/no). Default is auto (yes for UHD, no for rest)")
 
     ("rrc.feature_group", bpo::value<uint32_t>(&args->rrc.feature_group)->default_value(0xe6041c00), "Hex value of the featureGroupIndicators field in the"
                                                                                            "UECapabilityInformation message. Default 0xe6041c00")

srsue/src/phy/phch_common.cc

@@ -248,7 +248,7 @@ void phch_common::worker_end(uint32_t tti, bool tx_enable,
     radio_h->tx_single(buffer, nof_samples, tx_time);
     is_first_of_burst = false; 
   } else {
-    if (TX_MODE_CONTINUOUS) {
+    if (radio_h->is_continuous_tx()) {
       if (!is_first_of_burst) {
         radio_h->tx_single(zeros, nof_samples, tx_time);
       }

srsue/src/ue.cc

@@ -160,6 +160,9 @@ bool ue::init(all_args_t *args_)
   if (args->rf.burst_preamble.compare("auto")) {
     radio.set_burst_preamble(atof(args->rf.burst_preamble.c_str()));    
   }
+  if (args->rf.continuous_tx.compare("auto")) {
+    radio.set_continuous_tx(args->rf.continuous_tx.compare("yes")?false:true);
+  }
 
   radio.set_manual_calibration(&args->rf_cal);
 

srsue/ue.conf.example

@@ -21,6 +21,8 @@
 #                     Default "auto". B210 USRP: 100 samples, bladeRF: 27.
 # burst_preamble_us:  Preamble length to transmit before start of burst. 
 #                     Default "auto". B210 USRP: 400 us, bladeRF: 0 us.
+# continuous_tx:      Transmit samples continuously to the radio or on bursts (auto/yes/no).
+#                     Default is auto (yes for UHD, no for rest)
 #####################################################################
 [rf]
 dl_earfcn = 3400
@@ -33,6 +35,7 @@ rx_gain = 40
 #device_args = auto
 #time_adv_nsamples = auto
 #burst_preamble_us = auto
+#continuous_tx     = auto
 
 
 #####################################################################