enb_amarisoft: add rf_dev_sync option to specify the sync type

this allows to specify "external_clock" for example to use
the external REF input of an USRP

Change-Id: Ie066993440840cbd2c18e8f0c0c577b92ac7092d

src/osmo_gsm_tester/obj/enb.py

@@ -34,6 +34,7 @@ def on_register_schemas():
         'rx_gain': schema.UINT,
         'rf_dev_type': schema.STR,
         'rf_dev_args': schema.STR,
+        'rf_dev_sync': schema.STR,
         'additional_args[]': schema.STR,
         'inactivity_timer': schema.INT,
         'enable_measurements': schema.BOOL_STR,

src/osmo_gsm_tester/obj/enb_amarisoft.py

@@ -214,6 +214,7 @@ class AmarisoftENB(enb.eNodeB):
         # different cfg namespace 'trx'. Copy needed values over there:
         config.overlay(values, dict(trx=dict(rf_dev_type=values['enb'].get('rf_dev_type', None),
                                              rf_dev_args=values['enb'].get('rf_dev_args', None),
+                                             rf_dev_sync=values['enb'].get('rf_dev_sync', None),
                                              rx_gain=values['enb'].get('rx_gain', None),
                                              tx_gain=values['enb'].get('tx_gain', None),
                                             )))

src/osmo_gsm_tester/templates/amarisoft_rf_driver.cfg.tmpl

@@ -1,8 +1,7 @@
 rf_driver: {
     name: "${trx.rf_dev_type}",
-    sync: "${'1' if trx.rf_dev_type == 'zmq' else 'none'}",
-
     args: "${trx.rf_dev_args}",
+    sync: "${trx.rf_dev_sync}",
 
 % if trx.rf_dev_type == 'zmq':
     dl_sample_bits: 16,

sysmocom/defaults.conf

@@ -154,6 +154,7 @@ amarisoftenb:
   enable_pcap: false
   tx_gain: 89
   rx_gain: 60
+  rf_dev_sync: none
   log_options: all.level=error,all.max_size=0,nas.level=debug,nas.max_size=1,s1ap.level=debug,s1ap.max_size=1,x2ap.level=debug,x2ap.max_size=1,rrc.level=debug,rrc.max_size=1
 
 srsue: