diff options
| author | Tom Rondeau <tom@trondeau.com> | 2014-05-16 10:10:07 -0400 |
|---|---|---|
| committer | Tom Rondeau <tom@trondeau.com> | 2014-05-17 17:45:16 -0400 |
| commit | 372c53a1d57f052015dc1247896e6e49944b54fb (patch) | |
| tree | f846e7279525a4a0b8fe80298c4ef9869ab4dde6 /gr-digital/include | |
| parent | 5a55bb4e468812f3620323ab948d1ee4f12eab59 (diff) | |
digital: adding an async message passsing CRC32 calc/check block for PDUs.
Diffstat (limited to 'gr-digital/include')
| -rw-r--r-- | gr-digital/include/gnuradio/digital/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | gr-digital/include/gnuradio/digital/crc32_async_bb.h | 70 |
2 files changed, 71 insertions, 1 deletions
diff --git a/gr-digital/include/gnuradio/digital/CMakeLists.txt b/gr-digital/include/gnuradio/digital/CMakeLists.txt index 26e9412435..0d958e867f 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 0000000000..335ac20438 --- /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 */ |