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Implement the UPSAT FSK encoder block. 

Fix also a small bug at the UPSAT FSK decoder block.
This commit is contained in:
Manolis Surligas 2016-04-06 21:27:46 +03:00
parent 4b3b08f200
commit 228fd37014
10 changed files with 373 additions and 27 deletions
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3
grc/CMakeLists.txt
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@ -32,5 +32,6 @@ install(FILES
satnogs_tcp_rigctl_msg_source.xml
satnogs_frame_encoder.xml
satnogs_doppler_correction_cc.xml
satnogs_upsat_fsk_frame_acquisition.xml DESTINATION share/gnuradio/grc/blocks
satnogs_upsat_fsk_frame_acquisition.xml
satnogs_upsat_fsk_frame_encoder.xml DESTINATION share/gnuradio/grc/blocks
)

48
grc/satnogs_upsat_fsk_frame_acquisition.xml
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@ -1,23 +1,23 @@
<?xml version="1.0"?>
<block>
<name>UPSAT FSK Frame Acquisition</name>
<key>satnogs_upsat_fsk_frame_acquisition</key>
<category>satnogs</category>
<import>import satnogs</import>
<make>satnogs.upsat_fsk_frame_acquisition($preamble, $sync_word, $whitening, $manchester)</make>
<name>UPSAT FSK Frame Acquisition</name>
<key>satnogs_upsat_fsk_frame_acquisition</key>
<category>satnogs</category>
<import>import satnogs</import>
<make>satnogs.upsat_fsk_frame_acquisition($preamble, $sync_word, $whitening, $manchester)</make>
<param>
<name>Frame Preamble</name>
<key>preamble</key>
<type>raw</type>
</param>
<param>
<name>Frame Preamble</name>
<key>preamble</key>
<type>raw</type>
</param>
<param>
<name>Synchronization Word</name>
<key>sync_word</key>
<type>raw</type>
</param>
<param>
<name>Synchronization Word</name>
<key>sync_word</key>
<type>raw</type>
</param>
<param>
<name>Whitening</name>
<key>whitening</key>
@ -46,13 +46,13 @@
</option>
</param>
<sink>
<name>in</name>
<type>float</type>
</sink>
<sink>
<name>in</name>
<type>float</type>
</sink>
<source>
<name>pdu</name>
<type>message</type>
</source>
<source>
<name>pdu</name>
<type>message</type>
</source>
</block>

72
grc/satnogs_upsat_fsk_frame_encoder.xml Normal file
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@ -0,0 +1,72 @@
<?xml version="1.0"?>
<block>
<name>UPSAT FSK Frame Encoder</name>
<key>satnogs_upsat_fsk_frame_encoder</key>
<category>satnogs</category>
<import>import satnogs</import>
<make>satnogs.upsat_fsk_frame_encoder($preamble, $sync_word, $append_crc, $whitening, $manchester)</make>
<param>
<name>Frame Preamble</name>
<key>preamble</key>
<type>raw</type>
</param>
<param>
<name>Synchronization Word</name>
<key>sync_word</key>
<type>raw</type>
</param>
<param>
<name>Append CRC</name>
<key>append_crc</key>
<type>enum</type>
<option>
<name>Yes</name>
<key>True</key>
</option>
<option>
<name>No</name>
<key>False</key>
</option>
</param>
<param>
<name>Whitening</name>
<key>whitening</key>
<type>enum</type>
<option>
<name>No</name>
<key>False</key>
</option>
<option>
<name>Yes</name>
<key>True</key>
</option>
</param>
<param>
<name>Use Manchester Coding</name>
<key>manchester</key>
<type>enum</type>
<option>
<name>No</name>
<key>False</key>
</option>
<option>
<name>Yes</name>
<key>True</key>
</option>
</param>
<sink>
<name>pdu</name>
<type>message</type>
</sink>
<source>
<name>out</name>
<type>float</type>
</source>
</block>

3
include/satnogs/CMakeLists.txt
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@ -45,5 +45,6 @@ install(FILES
doppler_correction_cc.h
doppler_fit.h
freq_drift.h
upsat_fsk_frame_acquisition.h DESTINATION include/satnogs
upsat_fsk_frame_acquisition.h
upsat_fsk_frame_encoder.h DESTINATION include/satnogs
)

75
include/satnogs/upsat_fsk_frame_encoder.h Normal file
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@ -0,0 +1,75 @@
/* -*- c++ -*- */
/*
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
*
* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_H
#define INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_H
#include <satnogs/api.h>
#include <gnuradio/sync_block.h>
namespace gr
{
namespace satnogs
{
/*!
* \brief This block implements a FSK frame encoder for the UPSAT satellite.
* It takes as input a message containing the PDU and performs the NRZ
* encoding. The resulting float samples can be passed from a FM modulation
* block and then to the SDR device.
*
* \ingroup satnogs
*
*/
class SATNOGS_API upsat_fsk_frame_encoder : virtual public gr::sync_block
{
public:
typedef boost::shared_ptr<upsat_fsk_frame_encoder> sptr;
/*!
* Creates an FSK encoding block. Note that this block does NOT perform
* the frequency modulation. You can use the existing frequency modulation
* block shipped with the GNU Radio.
*
* @param preamble the bytes that consist the preamble of the frame
*
* @param sync_word the byte synchronization word
*
* @param append_crc if set to true the encoder will append a two byte
* CRC field at the end of the frame. The CRC algorithm is compatible
* with the CC1120 chip.
*
* @param whitening true if the transmitted data have been processed by
* the whitening algorithm of the CC1120 chip. False otherwise.
*
* @param manchester true if the transmitted data have been processed by
* the Manchester algorithm of the CC1120 chip. False otherwise.
*/
static sptr
make (const std::vector<uint8_t>& preamble,
const std::vector<uint8_t>& sync_word, bool append_crc = true,
bool whitening = false, bool manchester = false);
};
} // namespace satnogs
} // namespace gr
#endif /* INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_H */

3
lib/CMakeLists.txt
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@ -43,7 +43,8 @@ list(APPEND satnogs_sources
frame_encoder_impl.cc
doppler_fit.cc
freq_drift.cc
upsat_fsk_frame_acquisition_impl.cc )
upsat_fsk_frame_acquisition_impl.cc
upsat_fsk_frame_encoder_impl.cc )
set(satnogs_sources "${satnogs_sources}" PARENT_SCOPE)
if(NOT satnogs_sources)

2
lib/upsat_fsk_frame_acquisition_impl.cc
View File

@ -57,6 +57,7 @@ namespace gr
d_state (SEARCHING),
d_shifting_byte (0x0),
d_decoded_bytes (0),
d_decoded_bits (0),
d_frame_len (0)
{
message_port_register_out (pmt::mp ("pdu"));
@ -195,6 +196,7 @@ namespace gr
if (d_decoded_bytes == d_frame_len) {
message_port_pub (pmt::mp ("pdu"),
pmt::make_blob (d_pdu, d_frame_len));
LOG_WARN("Packet of %u", d_frame_len);
reset_state ();
}
}

129
lib/upsat_fsk_frame_encoder_impl.cc Normal file
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@ -0,0 +1,129 @@
/* -*- c++ -*- */
/*
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
*
* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gnuradio/io_signature.h>
#include "upsat_fsk_frame_encoder_impl.h"
#include <satnogs/log.h>
namespace gr
{
namespace satnogs
{
upsat_fsk_frame_encoder::sptr
upsat_fsk_frame_encoder::make (const std::vector<uint8_t>& preamble,
const std::vector<uint8_t>& sync_word,
bool append_crc, bool whitening,
bool manchester)
{
return gnuradio::get_initial_sptr (
new upsat_fsk_frame_encoder_impl (preamble, sync_word, append_crc,
whitening, manchester));
}
/*
* The private constructor
*/
upsat_fsk_frame_encoder_impl::upsat_fsk_frame_encoder_impl (
const std::vector<uint8_t>& preamble,
const std::vector<uint8_t>& sync_word, bool append_crc, bool whitening,
bool manchester) :
gr::sync_block ("upsat_fsk_frame_encoder",
gr::io_signature::make (0, 0, 0),
gr::io_signature::make (1, 1, sizeof(float))),
d_preamble (preamble),
d_preamble_len (preamble.size ()),
d_sync_word (sync_word),
d_sync_word_len (sync_word.size ()),
d_append_crc(append_crc),
d_whitening(whitening),
d_manchester(manchester),
d_encoded(0),
d_pdu_len(0)
{
message_port_register_in (pmt::mp ("pdu"));
/*
* Allocate memory for the maximum possible frame WITH all headers and
* tail fields
* +-------------+----------+--------+--------------------------+------+
* | Preamble | SFD | LENGTH | PDU | CRC |
* +-------------+----------+--------+--------------------------+------+
* User def. User def. 1B 1-255 B 2 B
*/
d_pdu = new uint8_t[d_preamble_len + d_sync_word_len + sizeof(uint8_t)
+ UPSAT_MAX_FRAME_LEN + sizeof(uint16_t)];
/* Copy the preamble at the start of the pdu */
memcpy(d_pdu, d_preamble.data(), d_preamble_len);
memcpy(d_pdu + d_preamble_len, d_sync_word.data(), d_sync_word_len);
}
/*
* Our virtual destructor.
*/
upsat_fsk_frame_encoder_impl::~upsat_fsk_frame_encoder_impl ()
{
delete [] d_pdu;
}
int
upsat_fsk_frame_encoder_impl::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
pmt::pmt_t pdu;
float *out = (float *) output_items[0];
/*
* If the whole previous frame has been successfully sent, block waiting
* for a new one
*/
if(d_encoded == 0){
pdu = delete_head_blocking(pmt::mp("pdu"));
d_pdu_len = pmt::blob_length (pdu);
if(d_pdu_len > UPSAT_MAX_FRAME_LEN){
LOG_ERROR("PDU is greater than the supported. Dropping the PDU");
return 0;
}
/* Set the frame length at the corresponding field */
d_pdu[d_preamble_len + d_sync_word_len] = (uint8_t) d_pdu_len;
/* Append the variable length PDU */
memcpy (d_pdu + d_preamble_len + d_sync_word_len + sizeof(uint8_t),
pmt::blob_data (pdu),
d_pdu_len * sizeof(uint8_t));
d_pdu_len += d_preamble_len + d_sync_word_len + sizeof(uint8_t);
/* If it is necessary calculate and append the CRC */
if(d_append_crc) {
/* TODO: Calc CRC */
d_pdu_len += sizeof(uint16_t);
}
}
return noutput_items;
}
} /* namespace satnogs */
} /* namespace gr */

62
lib/upsat_fsk_frame_encoder_impl.h Normal file
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@ -0,0 +1,62 @@
/* -*- c++ -*- */
/*
* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
*
* Copyright (C) 2016, Libre Space Foundation <http://librespacefoundation.org/>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_IMPL_H
#define INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_IMPL_H
#include <satnogs/upsat_fsk_frame_encoder.h>
namespace gr
{
namespace satnogs
{
class upsat_fsk_frame_encoder_impl : public upsat_fsk_frame_encoder
{
private:
const std::vector<uint8_t> d_preamble;
const size_t d_preamble_len;
const std::vector<uint8_t> d_sync_word;
const size_t d_sync_word_len;
const bool d_append_crc;
const bool d_whitening;
const bool d_manchester;
size_t d_encoded;
size_t d_pdu_len;
uint8_t *d_pdu;
public:
upsat_fsk_frame_encoder_impl (const std::vector<uint8_t>& preamble,
const std::vector<uint8_t>& sync_word,
bool append_crc, bool whitening,
bool manchester);
~upsat_fsk_frame_encoder_impl ();
// Where all the action really happens
int
work (int noutput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
} // namespace satnogs
} // namespace gr
#endif /* INCLUDED_SATNOGS_UPSAT_FSK_FRAME_ENCODER_IMPL_H */

3
swig/satnogs_swig.i
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@ -26,6 +26,7 @@
#include "satnogs/doppler_correction_cc.h"
#include "satnogs/frame_encoder.h"
#include "satnogs/upsat_fsk_frame_acquisition.h"
#include "satnogs/upsat_fsk_frame_encoder.h"
%}
@ -62,3 +63,5 @@ GR_SWIG_BLOCK_MAGIC2(satnogs, frame_encoder);
GR_SWIG_BLOCK_MAGIC2(satnogs, doppler_correction_cc);
%include "satnogs/upsat_fsk_frame_acquisition.h"
GR_SWIG_BLOCK_MAGIC2(satnogs, upsat_fsk_frame_acquisition);
%include "satnogs/upsat_fsk_frame_encoder.h"
GR_SWIG_BLOCK_MAGIC2(satnogs, upsat_fsk_frame_encoder);