Added new configurable block for demapping of control channels.
diff --git a/grc/demapping/gsm_universal_ctrl_chans_demapper.xml b/grc/demapping/gsm_universal_ctrl_chans_demapper.xml
new file mode 100644
index 0000000..48b0f83
--- /dev/null
+++ b/grc/demapping/gsm_universal_ctrl_chans_demapper.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0"?>
+<block>
+ <name>Universal ctrl chans demapper</name>
+ <key>gsm_universal_ctrl_chans_demapper</key>
+ <import>import gsm</import>
+ <make>gsm.universal_ctrl_chans_demapper($starts_fn_mod51, $channel_types)</make>
+
+ <param>
+ <name>starts_fn_mod51</name>
+ <key>starts_fn_mod51</key>
+ <value>[2,6,12,16,22,26,32,36,42,46]</value>
+ <type>int_vector</type>
+ <hide>part</hide>
+ </param>
+
+ <param>
+ <name>channel_types</name>
+ <key>channel_types</key>
+ <value>[1,2,2,2,2,2,2,2,2,2]</value>
+ <type>int_vector</type>
+ <hide>part</hide>
+ </param>
+
+ <sink>
+ <name>bursts</name>
+ <type>message</type>
+ </sink>
+ <source>
+ <name>bursts</name>
+ <type>message</type>
+ </source>
+</block>