[PATCH] osmocom-bb[fixeria/trx]: Add FAKE_RSSI and FAKE_TIMING commands on BB side

[Harald Welte]

Review at  https://gerrit.osmocom.org/6846

Add FAKE_RSSI and FAKE_TIMING commands on BB side

This is useful for testing the measurement processing code in OsmoBTS

Change-Id: Ia23becec4104d47e7b22350db67b8834d6f1ad1b
---
M src/target/fake_trx/burst_fwd.py
M src/target/fake_trx/ctrl_if_bb.py
2 files changed, 21 insertions(+), 4 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/46/6846/1

diff --git a/src/target/fake_trx/burst_fwd.py b/src/target/fake_trx/burst_fwd.py
index 5989ce9..8b04be1 100644
--- a/src/target/fake_trx/burst_fwd.py
+++ b/src/target/fake_trx/burst_fwd.py
@@ -25,6 +25,8 @@
 class BurstForwarder:
 	# Timeslot filter (drop everything by default)
 	ts_pass = None
+	rssi = 0x35
+	timing = 0
 
 	# Freq. filter
 	bts_freq = None
@@ -44,11 +46,11 @@
 		payload = bytearray(data)
 		length = len(payload)
 
-		# HACK: set fake RSSI value (-53)
-		payload[5] = 0x35
+		# set fake RSSI value (-53)
+		payload[5] = self.rssi
 
-		# HACK: add fake TOA value (6th and 7th bytes)
-		payload[6:2] = [0x00, 0x00]
+		# add fake TOA value (6th and 7th bytes)
+		payload[6:2] = [self.timing >> 8, self.timing & 0xff]
 
 		# Convert ubits to {255..0}
 		for i in range(8, length):
diff --git a/src/target/fake_trx/ctrl_if_bb.py b/src/target/fake_trx/ctrl_if_bb.py
index 440094a..f8ad5b4 100644
--- a/src/target/fake_trx/ctrl_if_bb.py
+++ b/src/target/fake_trx/ctrl_if_bb.py
@@ -118,6 +118,21 @@
 				self.burst_fwd.ts_pass = ts
 
 			return 0
+		elif self.verify_cmd(request, "FAKE_RSSI", 1):
+			print("[i] Recv FAKE_RSSI cmd")
+			self.burst_fwd.rssi = int(request[1])
+			# HACK: We don't return a response, as the command is typicaly sent
+			# by another program (test controller) and we don't want to confuse
+			# trxcon with bogus responses
+			return -1
+
+		elif self.verify_cmd(request, "FAKE_TIMING", 1):
+			print("[i] Recv FAKE_TIMING cmd")
+			self.burst_fwd.timing = int(request[1])
+			# HACK: We don't return a response, as the command is typicaly sent
+			# by another program (test controller) and we don't want to confuse
+			# trxcon with bogus responses
+			return -1
 
 		# Wrong / unknown command
 		else:

-- 
To view, visit https://gerrit.osmocom.org/6846
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Ia23becec4104d47e7b22350db67b8834d6f1ad1b
Gerrit-PatchSet: 1
Gerrit-Project: osmocom-bb
Gerrit-Branch: fixeria/trx
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>