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[Commit-gnuradio] [gnuradio] 41/57: digital: adding an async message pas


From: git
Subject: [Commit-gnuradio] [gnuradio] 41/57: digital: adding an async message passsing CRC32 calc/check block for PDUs.
Date: Wed, 21 May 2014 03:10:30 +0000 (UTC)

This is an automated email from the git hooks/post-receive script.

trondeau pushed a commit to branch master
in repository gnuradio.

commit 372c53a1d57f052015dc1247896e6e49944b54fb
Author: Tom Rondeau <address@hidden>
Date:   Fri May 16 10:10:07 2014 -0400

    digital: adding an async message passsing CRC32 calc/check block for PDUs.
---
 gr-digital/grc/digital_block_tree.xml              |   1 +
 gr-digital/grc/digital_crc32_async_bb.xml          |  32 ++
 gr-digital/include/gnuradio/digital/CMakeLists.txt |   2 +-
 .../include/gnuradio/digital/crc32_async_bb.h      |  70 +++
 gr-digital/lib/CMakeLists.txt                      |   1 +
 gr-digital/lib/crc32_async_bb_impl.cc              | 122 +++++
 gr-digital/lib/crc32_async_bb_impl.h               |  60 +++
 gr-digital/python/digital/packet_utils.py          | 540 +++++++++++----------
 gr-digital/swig/digital_swig.i                     |   3 +
 9 files changed, 562 insertions(+), 269 deletions(-)

diff --git a/gr-digital/grc/digital_block_tree.xml 
b/gr-digital/grc/digital_block_tree.xml
index b54cb03..c77876f 100644
--- a/gr-digital/grc/digital_block_tree.xml
+++ b/gr-digital/grc/digital_block_tree.xml
@@ -69,6 +69,7 @@
     <block>digital_correlate_access_code_tag_bb</block>
     <block>digital_correlate_access_code_xx_ts</block>
     <block>digital_crc32_bb</block>
+    <block>digital_crc32_async_bb</block>
     <block>digital_framer_sink_1</block>
     <block>digital_header_payload_demux</block>
     <block>digital_packet_headergenerator_bb</block>
diff --git a/gr-digital/grc/digital_crc32_async_bb.xml 
b/gr-digital/grc/digital_crc32_async_bb.xml
new file mode 100644
index 0000000..84c60e6
--- /dev/null
+++ b/gr-digital/grc/digital_crc32_async_bb.xml
@@ -0,0 +1,32 @@
+<block>
+  <name>Async CRC32</name>
+  <key>digital_crc32_async_bb</key>
+  <import>from gnuradio import digital</import>
+  <make>digital.crc32_async_bb($check)</make>
+
+  <param>
+    <name>Mode</name>
+    <key>check</key>
+    <type>enum</type>
+    <option>
+      <name>Generate CRC</name>
+      <key>False</key>
+    </option>
+    <option>
+      <name>Check CRC</name>
+      <key>True</key>
+    </option>
+  </param>
+
+  <sink>
+    <name>in</name>
+    <type>message</type>
+    <optional>1</optional>
+  </sink>
+
+  <source>
+    <name>out</name>
+    <type>message</type>
+    <optional>1</optional>
+  </source>
+</block>
diff --git a/gr-digital/include/gnuradio/digital/CMakeLists.txt 
b/gr-digital/include/gnuradio/digital/CMakeLists.txt
index 26e9412..0d958e8 100644
--- a/gr-digital/include/gnuradio/digital/CMakeLists.txt
+++ b/gr-digital/include/gnuradio/digital/CMakeLists.txt
@@ -94,6 +94,7 @@ install(FILES
     cpmmod_bc.h
     crc32.h
     crc32_bb.h
+    crc32_async_bb.h
     descrambler_bb.h
     diff_decoder_bb.h
     diff_encoder_bb.h
@@ -146,4 +147,3 @@ install(FILES
     DESTINATION ${GR_INCLUDE_DIR}/gnuradio/digital
     COMPONENT "digital_devel"
 )
-
diff --git a/gr-digital/include/gnuradio/digital/crc32_async_bb.h 
b/gr-digital/include/gnuradio/digital/crc32_async_bb.h
new file mode 100644
index 0000000..335ac20
--- /dev/null
+++ b/gr-digital/include/gnuradio/digital/crc32_async_bb.h
@@ -0,0 +1,70 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2014 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+
+#ifndef INCLUDED_DIGITAL_CRC32_ASYNC_BB_H
+#define INCLUDED_DIGITAL_CRC32_ASYNC_BB_H
+
+#include <gnuradio/digital/api.h>
+#include <gnuradio/block.h>
+
+namespace gr {
+  namespace digital {
+
+    /*!
+     * \brief Byte-stream CRC block for async messages
+     * \ingroup packet_operators_blk
+     *
+     * \details
+     *
+     * Processes packets (as async PDU messages) for CRC32. The \p
+     * check parameter determines if the block acts to check and strip
+     * the CRC or to calculate and append the CRC32.
+     *
+     * The input PDU is expected to be a message of packet bytes.
+     *
+     * When using check mode, if the CRC passes, the output is a
+     * payload of the message with the CRC stripped, so the output
+     * will be 4 bytes smaller than the input.
+     *
+     * When using calculate mode (check == false), then the CRC is
+     * calculated on the PDU and appended to it. The output is then 4
+     * bytes longer than the input.
+     *
+     * This block implements the CRC32 using the Boost crc_optimal
+     * class for 32-bit CRCs with the standard generator 0x04C11DB7.
+     */
+    class DIGITAL_API crc32_async_bb : virtual public block
+    {
+     public:
+      typedef boost::shared_ptr<crc32_async_bb> sptr;
+
+      /*!
+       * \param check Set to true if you want to check CRC, false to create 
CRC.
+       */
+      static sptr make(bool check=false);
+    };
+
+  } // namespace digital
+} // namespace gr
+
+#endif /* INCLUDED_DIGITAL_CRC32_ASYNC_BB_H */
diff --git a/gr-digital/lib/CMakeLists.txt b/gr-digital/lib/CMakeLists.txt
index fef057e..926dca1 100644
--- a/gr-digital/lib/CMakeLists.txt
+++ b/gr-digital/lib/CMakeLists.txt
@@ -130,6 +130,7 @@ list(APPEND digital_sources
     cpmmod_bc_impl.cc
     crc32.cc
     crc32_bb_impl.cc
+    crc32_async_bb_impl.cc
     descrambler_bb_impl.cc
     diff_decoder_bb_impl.cc
     diff_encoder_bb_impl.cc
diff --git a/gr-digital/lib/crc32_async_bb_impl.cc 
b/gr-digital/lib/crc32_async_bb_impl.cc
new file mode 100644
index 0000000..c5c5187
--- /dev/null
+++ b/gr-digital/lib/crc32_async_bb_impl.cc
@@ -0,0 +1,122 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2014 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/io_signature.h>
+#include <volk/volk.h>
+#include "crc32_async_bb_impl.h"
+
+namespace gr {
+  namespace digital {
+
+    crc32_async_bb::sptr
+    crc32_async_bb::make(bool check)
+    {
+      return gnuradio::get_initial_sptr
+        (new crc32_async_bb_impl(check));
+    }
+
+    crc32_async_bb_impl::crc32_async_bb_impl(bool check)
+      : block("crc32_async_bb",
+              io_signature::make(0, 0, 0),
+              io_signature::make(0, 0, 0)),
+       d_check(check), d_npass(0), d_nfail(0)
+    {
+      d_in_port = pmt::mp("in");
+      d_out_port = pmt::mp("out");
+
+      message_port_register_in(d_in_port);
+      message_port_register_out(d_out_port);
+
+      if(check)
+        set_msg_handler(d_in_port, boost::bind(&crc32_async_bb_impl::check, 
this ,_1) );
+      else
+        set_msg_handler(d_in_port, boost::bind(&crc32_async_bb_impl::calc, 
this ,_1) );
+    }
+
+    crc32_async_bb_impl::~crc32_async_bb_impl()
+    {
+    }
+
+    void
+    crc32_async_bb_impl::calc(pmt::pmt_t msg)
+    {
+      // extract input pdu
+      pmt::pmt_t meta(pmt::car(msg));
+      pmt::pmt_t bytes(pmt::cdr(msg));
+
+      unsigned int crc;
+      size_t pkt_len(0);
+      const uint8_t* bytes_in = pmt::u8vector_elements(bytes, pkt_len);
+      uint8_t* bytes_out = (uint8_t*)volk_malloc(4 + pkt_len*sizeof(uint8_t),
+                                                 volk_get_alignment());
+
+      d_crc_impl.reset();
+      d_crc_impl.process_bytes(bytes_in, pkt_len);
+      crc = d_crc_impl();
+      memcpy((void*)bytes_out, (const void*)bytes_in, pkt_len);
+      memcpy((void*)(bytes_out + pkt_len), &crc, 4); // FIXME 
big-endian/little-endian, this might be wrong
+
+      pmt::pmt_t output = pmt::init_u8vector(pkt_len+4, bytes_out);
+      pmt::pmt_t msg_pair = pmt::cons(meta, output);
+      message_port_pub(d_out_port, msg_pair);
+    }
+
+    void
+    crc32_async_bb_impl::check(pmt::pmt_t msg)
+    {
+      // extract input pdu
+      pmt::pmt_t meta(pmt::car(msg));
+      pmt::pmt_t bytes(pmt::cdr(msg));
+
+      unsigned int crc;
+      size_t pkt_len(0);
+      const uint8_t* bytes_in = pmt::u8vector_elements(bytes, pkt_len);
+
+      d_crc_impl.reset();
+      d_crc_impl.process_bytes(bytes_in, pkt_len-4);
+      crc = d_crc_impl();
+      if(crc != *(unsigned int*)(bytes_in+pkt_len-4)) { // Drop package
+        d_nfail++;
+        return;
+      }
+      d_npass++;
+
+      pmt::pmt_t output = pmt::init_u8vector(pkt_len-4, bytes_in);
+      pmt::pmt_t msg_pair = pmt::cons(meta, output);
+      message_port_pub(d_out_port, msg_pair);
+    }
+
+    int
+    crc32_async_bb_impl::general_work(int noutput_items,
+                                      gr_vector_int &ninput_items,
+                                      gr_vector_const_void_star &input_items,
+                                      gr_vector_void_star &output_items)
+    {
+      return noutput_items;
+    }
+
+  } /* namespace digital */
+} /* namespace gr */
diff --git a/gr-digital/lib/crc32_async_bb_impl.h 
b/gr-digital/lib/crc32_async_bb_impl.h
new file mode 100644
index 0000000..6ec0e8e
--- /dev/null
+++ b/gr-digital/lib/crc32_async_bb_impl.h
@@ -0,0 +1,60 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2014 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_DIGITAL_CRC32_ASYNC_BB_IMPL_H
+#define INCLUDED_DIGITAL_CRC32_ASYNC_BB_IMPL_H
+
+#include <gnuradio/digital/crc32_async_bb.h>
+#include <boost/crc.hpp>
+
+namespace gr {
+  namespace digital {
+
+    class crc32_async_bb_impl : public crc32_async_bb
+    {
+     private:
+      bool d_check;
+      boost::crc_optimal<32, 0x04C11DB7, 0xFFFFFFFF, 0xFFFFFFFF, true, true> 
d_crc_impl;
+
+      pmt::pmt_t d_in_port;
+      pmt::pmt_t d_out_port;
+
+      void calc(pmt::pmt_t msg);
+      void check(pmt::pmt_t msg);
+
+     public:
+      crc32_async_bb_impl(bool check);
+      ~crc32_async_bb_impl();
+
+      int general_work(int noutput_items,
+                       gr_vector_int &ninput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items);
+
+      uint64_t d_npass;
+      uint64_t d_nfail;
+    };
+
+  } // namespace digital
+} // namespace gr
+
+#endif /* INCLUDED_DIGITAL_CRC32_ASYNC_BB_IMPL_H */
diff --git a/gr-digital/python/digital/packet_utils.py 
b/gr-digital/python/digital/packet_utils.py
index d7aa4e6..efb3252 100644
--- a/gr-digital/python/digital/packet_utils.py
+++ b/gr-digital/python/digital/packet_utils.py
@@ -1,23 +1,23 @@
 #
 # Copyright 2005,2006,2007 Free Software Foundation, Inc.
-# 
+#
 # This file is part of GNU Radio
-# 
+#
 # GNU Radio is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 3, or (at your option)
 # any later version.
-# 
+#
 # GNU Radio is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
-# 
+#
 # You should have received a copy of the GNU General Public License
 # along with GNU Radio; see the file COPYING.  If not, write to
 # the Free Software Foundation, Inc., 51 Franklin Street,
 # Boston, MA 02110-1301, USA.
-# 
+#
 
 import struct
 import numpy
@@ -47,7 +47,7 @@ def conv_1_0_string_to_packed_binary_string(s):
     """
     if not is_1_0_string(s):
         raise ValueError, "Input must be a string containing only 0's and 1's"
-    
+
     # pad to multiple of 8
     padded = False
     rem = len(s) % 8
@@ -67,7 +67,7 @@ def conv_1_0_string_to_packed_binary_string(s):
         r.append(chr(t))
         i += 8
     return (''.join(r), padded)
-        
+
 
 default_access_code = \
   conv_packed_binary_string_to_1_0_string('\xAC\xDD\xA4\xE2\xF2\x8C\x20\xFC')
@@ -103,7 +103,8 @@ def make_header(payload_len, whitener_offset=0):
 
 def make_packet(payload, samples_per_symbol, bits_per_symbol,
                 preamble=default_preamble, access_code=default_access_code,
-                pad_for_usrp=True, whitener_offset=0, whitening=True):
+                pad_for_usrp=True, whitener_offset=0, whitening=True,
+                calc_crc=True):
     """
     Build a packet, given access code, payload, and whitener offset
 
@@ -116,7 +117,8 @@ def make_packet(payload, samples_per_symbol, 
bits_per_symbol,
         pad_for_usrp: If true, packets are padded such that they end up a 
multiple of 128 samples(512 bytes)
         whitener_offset: offset into whitener string to use [0-16)
         whitening: Whether to turn on data whitening(scrambling) (boolean)
-    
+        calc_crc: Whether to calculate CRC32 or not (boolean)
+
     Packet will have access code at the beginning, followed by length, payload
     and finally CRC-32.
     """
@@ -131,8 +133,11 @@ def make_packet(payload, samples_per_symbol, 
bits_per_symbol,
 
     (packed_access_code, padded) = 
conv_1_0_string_to_packed_binary_string(access_code)
     (packed_preamble, ignore) = 
conv_1_0_string_to_packed_binary_string(preamble)
-    
-    payload_with_crc = crc.gen_and_append_crc32(payload)
+
+    if(calc_crc):
+        payload_with_crc = crc.gen_and_append_crc32(payload)
+    else:
+        payload_with_crc = payload
     #print "outbound crc =", string_to_hex_list(payload_with_crc[-4:])
 
     L = len(payload_with_crc)
@@ -175,7 +180,7 @@ def _npadding_bytes(pkt_byte_len, samples_per_symbol, 
bits_per_symbol):
     if r == 0:
         return 0
     return byte_modulus - r
-    
+
 
 def unmake_packet(whitened_payload_with_crc, whitener_offset=0, 
dewhitening=True):
     """
@@ -202,262 +207,261 @@ def unmake_packet(whitened_payload_with_crc, 
whitener_offset=0, dewhitening=True
 
 # FYI, this PN code is the output of a 15-bit LFSR
 random_mask_tuple = (
-  255,  63,   0,  16,   0,  12,   0,   5, 192,   3,  16,   1, 204,   0,  85, 
192, 
-   63,  16,  16,  12,  12,   5, 197, 195,  19,  17, 205, 204,  85, 149, 255,  
47, 
-    0,  28,   0,   9, 192,   6, 208,   2, 220,   1, 153, 192, 106, 208,  47,  
28, 
-   28,   9, 201, 198, 214, 210, 222, 221, 152,  89, 170, 186, 255,  51,   0,  
21, 
-  192,  15,  16,   4,  12,   3,  69, 193, 243,  16,  69, 204,  51,  21, 213, 
207, 
-   31,  20,   8,  15,  70, 132,  50, 227,  85, 137, 255,  38, 192,  26, 208,  
11, 
-   28,   7,  73, 194, 182, 209, 182, 220, 118, 217, 230, 218, 202, 219,  23,  
27, 
-   78, 139, 116, 103, 103, 106, 170, 175,  63,  60,  16,  17, 204,  12,  85, 
197, 
-  255,  19,   0,  13, 192,   5, 144,   3,  44,   1, 221, 192,  89, 144,  58, 
236, 
-   19,  13, 205, 197, 149, 147,  47,  45, 220,  29, 153, 201, 170, 214, 255,  
30, 
-  192,   8,  80,   6, 188,   2, 241, 193, 132,  80,  99, 124,  41, 225, 222, 
200, 
-   88,  86, 186, 190, 243,  48,  69, 212,  51,  31,  85, 200,  63,  22, 144,  
14, 
-  236,   4,  77, 195, 117, 145, 231,  44,  74, 157, 247,  41, 134, 158, 226, 
232, 
-   73, 142, 182, 228, 118, 203, 102, 215, 106, 222, 175,  24, 124,  10, 161, 
199, 
-   56,  82, 146, 189, 173, 177, 189, 180, 113, 183, 100, 118, 171, 102, 255, 
106, 
-  192,  47,  16,  28,  12,   9, 197, 198, 211,  18, 221, 205, 153, 149, 170, 
239, 
-   63,  12,  16,   5, 204,   3,  21, 193, 207,  16,  84,  12,  63,  69, 208,  
51, 
-   28,  21, 201, 207,  22, 212,  14, 223,  68,  88,  51, 122, 149, 227,  47,   
9, 
-  220,   6, 217, 194, 218, 209, 155,  28, 107,  73, 239, 118, 204,  38, 213, 
218, 
-  223,  27,  24,  11,  74, 135, 119,  34, 166, 153, 186, 234, 243,  15,   5, 
196, 
-    3,  19,  65, 205, 240,  85, 132,  63,  35,  80,  25, 252,  10, 193, 199,  
16, 
-   82, 140,  61, 165, 209, 187,  28, 115,  73, 229, 246, 203,   6, 215,  66, 
222, 
-  177, 152, 116, 106, 167, 111,  58, 172,  19,  61, 205, 209, 149, 156, 111,  
41, 
-  236,  30, 205, 200,  85, 150, 191,  46, 240,  28,  68,   9, 243,  70, 197, 
242, 
-  211,   5, 157, 195,  41, 145, 222, 236,  88,  77, 250, 181, 131,  55,  33, 
214, 
-  152,  94, 234, 184,  79,  50, 180,  21, 183,  79,  54, 180,  22, 247,  78, 
198, 
-  180,  82, 247, 125, 134, 161, 162, 248, 121, 130, 162, 225, 185, 136, 114, 
230, 
-  165, 138, 251,  39,   3,  90, 129, 251,  32,  67,  88,  49, 250, 148,  67,  
47, 
-  113, 220,  36,  89, 219, 122, 219,  99,  27, 105, 203, 110, 215, 108,  94, 
173, 
-  248, 125, 130, 161, 161, 184, 120, 114, 162, 165, 185, 187,  50, 243,  85, 
133, 
-  255,  35,   0,  25, 192,  10, 208,   7,  28,   2, 137, 193, 166, 208, 122, 
220, 
-   35,  25, 217, 202, 218, 215,  27,  30, 139,  72, 103, 118, 170, 166, 255,  
58, 
-  192,  19,  16,  13, 204,   5, 149, 195,  47,  17, 220,  12,  89, 197, 250, 
211, 
-    3,  29, 193, 201, 144,  86, 236,  62, 205, 208,  85, 156,  63,  41, 208,  
30, 
-  220,   8,  89, 198, 186, 210, 243,  29, 133, 201, 163,  22, 249, 206, 194, 
212, 
-   81, 159, 124, 104,  33, 238, 152,  76, 106, 181, 239,  55,  12,  22, 133, 
206, 
-  227,  20,  73, 207, 118, 212,  38, 223,  90, 216,  59,  26, 147,  75,  45, 
247, 
-   93, 134, 185, 162, 242, 249, 133, 130, 227,  33, 137, 216, 102, 218, 170, 
219, 
-   63,  27,  80,  11, 124,   7,  97, 194, 168,  81, 190, 188, 112, 113, 228,  
36, 
-   75,  91, 119, 123, 102, 163, 106, 249, 239,   2, 204,   1, 149, 192, 111,  
16, 
-   44,  12,  29, 197, 201, 147,  22, 237, 206, 205, 148,  85, 175, 127,  60,  
32, 
-   17, 216,  12,  90, 133, 251,  35,   3,  89, 193, 250, 208,  67,  28,  49, 
201, 
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202, 
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203, 
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123, 
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244, 
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215, 
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166, 
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121, 
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107, 
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225, 
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46, 
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9, 
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197, 
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180, 
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158, 
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86, 
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118, 
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111, 
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49, 
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212, 
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204, 
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113, 
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248, 
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229, 
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207, 
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60, 
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235, 
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189, 
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91, 
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245, 
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200, 
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5, 
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216, 
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50, 
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225, 
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90, 
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94, 
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248, 
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243, 
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215, 
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174, 
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61, 
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205, 
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221, 
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234, 
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211, 
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187, 
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4, 
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166, 
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210, 
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217, 
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36, 
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129, 
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176, 
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72, 
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147, 
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240, 
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16, 
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55, 
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57, 
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104, 
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191, 
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162, 
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116, 
-   44,  39,  93, 218, 185, 155,  50, 235,  85, 143, 127,  36,  32,  27,  88,  
11, 
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253, 
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165, 
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49, 
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248, 
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219, 
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99, 
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224, 
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39, 
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14, 
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81, 
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215, 
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29, 
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214, 
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127, 
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246, 
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88, 
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148, 
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201, 
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35, 
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184, 
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131, 
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199, 
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41, 
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95, 
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134, 
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202, 
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203, 
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169, 
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137, 
-  200, 102, 214, 170, 222, 255,  24,  64,  10, 176,   7,  52,   2, 151,  65, 
174, 
-  176, 124, 116,  33, 231,  88,  74, 186, 183,  51,  54, 149, 214, 239,  30, 
204, 
-    8,  85, 198, 191,  18, 240,  13, 132,   5, 163,  67,  57, 241, 210, 196,  
93, 
-  147, 121, 173, 226, 253, 137, 129, 166, 224, 122, 200,  35,  22, 153, 206, 
234, 
-  212,  79,  31, 116,   8,  39,  70, 154, 178, 235,  53, 143,  87,  36,  62, 
155, 
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59, 
-   23,  83,  78, 189, 244, 113, 135, 100,  98, 171, 105, 191, 110, 240,  44,  
68, 
-   29, 243,  73, 133, 246, 227,   6, 201, 194, 214, 209, 158, 220, 104,  89, 
238, 
-  186, 204, 115,  21, 229, 207,  11,  20,   7,  79,  66, 180,  49, 183,  84, 
118, 
-  191, 102, 240,  42, 196,  31,  19,  72,  13, 246, 133, 134, 227,  34, 201, 
217, 
-  150, 218, 238, 219,  12,  91,  69, 251, 115,   3, 101, 193, 235,  16,  79,  
76, 
-   52,  53, 215,  87,  30, 190, 136, 112, 102, 164,  42, 251,  95,   3, 120,   
1, 
-  226, 128,  73, 160,  54, 248,  22, 194, 142, 209, 164,  92, 123, 121, 227,  
98, 
-  201, 233, 150, 206, 238, 212,  76,  95, 117, 248,  39,   2, 154, 129, 171,  
32, 
-  127,  88,  32,  58, 152,  19,  42, 141, 223,  37, 152,  27,  42, 139,  95,  
39, 
-  120,  26, 162, 139,  57, 167,  82, 250, 189, 131,  49, 161, 212, 120,  95,  
98, 
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221,
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234,
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211,
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187,
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4,
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166,
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217,
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36,
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176,
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147,
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240,
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162,
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116,
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253,
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224,
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14,
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215,
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246,
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148,
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201,
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184,
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131,
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41,
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95,
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134,
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202,
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169,
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137,
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174,
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204,
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93,
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234,
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155,
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59,
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68,
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238,
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118,
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217,
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76,
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1,
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98,
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32,
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39,
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98,
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145,
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183,
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113,
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160,
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127,
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170,
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152,
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175,
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149,
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77,
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99,
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66,
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7,
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69,
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243,
+   35,   5, 217, 195,  26, 209, 203,  28,  87,  73, 254, 182, 192, 118, 208,  
38,
+  220,  26, 217, 203,  26, 215,  75,  30, 183,  72, 118, 182, 166, 246, 250, 
198,
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209,
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223,
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213,
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50,
+  162, 149, 185, 175,  50, 252,  21, 129, 207,  32,  84,  24,  63,  74, 144,  
55,
+   44,  22, 157, 206, 233, 148,  78, 239, 116,  76,  39, 117, 218, 167,  27,  
58,
+  139,  83,  39, 125, 218, 161, 155,  56, 107,  82, 175, 125, 188,  33, 177, 
216,
+  116,  90, 167, 123,  58, 163,  83,  57, 253, 210, 193, 157, 144, 105, 172,  
46,
+  253, 220,  65, 153, 240, 106, 196,  47,  19,  92,  13, 249, 197, 130, 211,  
33,
+  157, 216, 105, 154, 174, 235,  60,  79,  81, 244,  60,  71,  81, 242, 188,  
69,
+  177, 243,  52,  69, 215, 115,  30, 165, 200, 123,  22, 163,  78, 249, 244,  
66,
+  199, 113, 146, 164, 109, 187, 109, 179, 109, 181, 237, 183,  13, 182, 133, 
182,
   227,  54, 201, 214, 214, 222, 222, 216,  88,  90, 186, 187,  51,  51, 255,  
63 )
 
 random_mask_vec8 = numpy.array(random_mask_tuple, numpy.uint8)
-
diff --git a/gr-digital/swig/digital_swig.i b/gr-digital/swig/digital_swig.i
index 9ba57e8..43f68a3 100644
--- a/gr-digital/swig/digital_swig.i
+++ b/gr-digital/swig/digital_swig.i
@@ -61,6 +61,7 @@
 #include "gnuradio/digital/cpmmod_bc.h"
 #include "gnuradio/digital/crc32.h"
 #include "gnuradio/digital/crc32_bb.h"
+#include "gnuradio/digital/crc32_async_bb.h"
 #include "gnuradio/digital/descrambler_bb.h"
 #include "gnuradio/digital/diff_decoder_bb.h"
 #include "gnuradio/digital/diff_encoder_bb.h"
@@ -136,6 +137,7 @@
 %include "gnuradio/digital/cpmmod_bc.h"
 %include "gnuradio/digital/crc32.h"
 %include "gnuradio/digital/crc32_bb.h"
+%include "gnuradio/digital/crc32_async_bb.h"
 %include "gnuradio/digital/descrambler_bb.h"
 %include "gnuradio/digital/diff_decoder_bb.h"
 %include "gnuradio/digital/diff_encoder_bb.h"
@@ -204,6 +206,7 @@ GR_SWIG_BLOCK_MAGIC2(digital, correlate_access_code_ff_ts);
 GR_SWIG_BLOCK_MAGIC2(digital, correlate_and_sync_cc);
 GR_SWIG_BLOCK_MAGIC2(digital, costas_loop_cc);
 GR_SWIG_BLOCK_MAGIC2(digital, crc32_bb);
+GR_SWIG_BLOCK_MAGIC2(digital, crc32_async_bb);
 GR_SWIG_BLOCK_MAGIC2(digital, cpmmod_bc);
 GR_SWIG_BLOCK_MAGIC2(digital, descrambler_bb);
 GR_SWIG_BLOCK_MAGIC2(digital, diff_decoder_bb);



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