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   1 <?xml version="1.0"?>
   2 <!--
   3 ###################################################
   4 ##Valve:
   5 ##      Custom blks2 block
   6 ###################################################
   7  -->
   8 <block>
   9         <name>Valve</name>
  10         <key>blks2_valve</key>
  11         <import>from grc_gnuradio import blks2 as grc_blks2</import>
  12         <make>grc_blks2.valve(item_size=$type.size*$vlen, open=bool($open))</make>
  13         <callback>set_open(bool($open))</callback>
  14         <param>
  15                 <name>Type</name>
  16                 <key>type</key>
  17                 <type>enum</type>
  18                 <option>
  19                         <name>Complex</name>
  20                         <key>complex</key>
  21                         <opt>size:gr.sizeof_gr_complex</opt>
  22                 </option>
  23                 <option>
  24                         <name>Float</name>
  25                         <key>float</key>
  26                         <opt>size:gr.sizeof_float</opt>
  27                 </option>
  28                 <option>
  29                         <name>Int</name>
  30                         <key>int</key>
  31                         <opt>size:gr.sizeof_int</opt>
  32                 </option>
  33                 <option>
  34                         <name>Short</name>
  35                         <key>short</key>
  36                         <opt>size:gr.sizeof_short</opt>
  37                 </option>
  38                 <option>
  39                         <name>Byte</name>
  40                         <key>byte</key>
  41                         <opt>size:gr.sizeof_char</opt>
  42                 </option>
  43         </param>
  44         <param>
  45                 <name>Open</name>
  46                 <key>open</key>
  47                 <value>0</value>
  48                 <type>raw</type>
  49         </param>
  50         <param>
  51                 <name>Vec Length</name>
  52                 <key>vlen</key>
  53                 <value>1</value>
  54                 <type>int</type>
  55         </param>
  56         <check>$vlen &gt; 0</check>
  57         <sink>
  58                 <name>in</name>
  59                 <type>$type</type>
  60                 <vlen>$vlen</vlen>
  61                 <nports>$num_inputs</nports>
  62         </sink>
  63         <source>
  64                 <name>out</name>
  65                 <type>$type</type>
  66                 <vlen>$vlen</vlen>
  67                 <nports>$num_outputs</nports>
  68         </source>
  69         <doc>
  70 Connect output to input when valve is closed (not open).
  71         </doc>
  72 </block>