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<a href="fixed_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* Configure the RS codec with fixed parameters for CCSDS standard</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * (255,223) code over GF(256). Note: the conventional basis is still</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * used; the dual-basis mappings are performed in [en|de]code_rs_ccsds.c</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Copyright 2002 Phil Karn, KA9Q</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * May be used under the terms of the GNU General Public License (GPL)</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"><a class="code" href="fixed_8h.html#a3834ad0136a8b95a6589500e4009fe9a"> 8</a></span> <span class="preprocessor">#define DTYPE unsigned char</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <<a class="code" href="gr__core__api_8h.html">gr_core_api.h</a>></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a name="l00012"></a><span class="lineno"><a class="code" href="fixed_8h.html#aa185022967929586fd5824ec159594af"> 12</a></span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="fixed_8h.html#aa185022967929586fd5824ec159594af">mod255</a>(<span class="keywordtype">int</span> x){</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  <span class="keywordflow">while</span> (x >= 255) {</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  x -= 255;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  x = (x >> 8) + (x & 255);</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  }</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  <span class="keywordflow">return</span> x;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> }</div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="code" href="fixed_8h.html#a3ed9b2483e4d6616a203769ad381c97c"> 19</a></span> <span class="preprocessor">#define MODNN(x) mod255(x)</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="fixed_8h.html#a279d78d176dce547f9c14013697c596d">CCSDS_alpha_to</a>[];</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="fixed_8h.html#af02d2618c62e7608d095b70f6f3d8a0b">CCSDS_index_of</a>[];</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="fixed_8h.html#acd181b4a095d752a1164dcfb3951411a">CCSDS_poly</a>[];</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="code" href="fixed_8h.html#afdc383f8992f4a960bb22998f57b6d37"> 25</a></span> <span class="preprocessor">#define MM 8</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="fixed_8h.html#a170755e30c36be4904106b7bb279b1ec"> 26</a></span> <span class="preprocessor"></span><span class="preprocessor">#define NN 255</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="fixed_8h.html#afae14aea58e6520b2057147833c699de"> 27</a></span> <span class="preprocessor"></span><span class="preprocessor">#define ALPHA_TO CCSDS_alpha_to</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="fixed_8h.html#a690b4c8564b1cb507383e7a78f4cd6dc"> 28</a></span> <span class="preprocessor"></span><span class="preprocessor">#define INDEX_OF CCSDS_index_of</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="code" href="fixed_8h.html#a90fbc87e4b99a54543c8f37087cb4f03"> 29</a></span> <span class="preprocessor"></span><span class="preprocessor">#define GENPOLY CCSDS_poly</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="fixed_8h.html#a5f5b4d84f10e6a71bef7c65548a8e317"> 30</a></span> <span class="preprocessor"></span><span class="preprocessor">#define NROOTS 32</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="fixed_8h.html#a264b36b13386e3f62fe69e04711bc006"> 31</a></span> <span class="preprocessor"></span><span class="preprocessor">#define FCR 112</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="code" href="fixed_8h.html#a6dd0302d2b9ced6e396b9182a6287b9e"> 32</a></span> <span class="preprocessor"></span><span class="preprocessor">#define PRIM 11</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="code" href="fixed_8h.html#a8487c20a46e1e08f7aeabec7cef80945"> 33</a></span> <span class="preprocessor"></span><span class="preprocessor">#define IPRIM 116</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="code" href="fixed_8h.html#a0d158f1e3af2ab523eb8423db3e5bd6e"> 34</a></span> <span class="preprocessor"></span><span class="preprocessor">#define A0 (NN)</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="code" href="fixed_8h.html#ad826cb74e3f1ac5d6ce040c651d6f737"> 36</a></span> <span class="preprocessor">#define ENCODE_RS encode_rs_8</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="code" href="fixed_8h.html#a974397d0c45a6897c0a3d72d5e571c54"> 37</a></span> <span class="preprocessor"></span><span class="preprocessor">#define DECODE_RS decode_rs_8</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <a class="code" href="gr__core__api_8h.html#a8b8937b0c61edd85ab57ce8203543248">GR_CORE_API</a> <span class="keywordtype">void</span> <a class="code" href="char_8h.html#ad826cb74e3f1ac5d6ce040c651d6f737">ENCODE_RS</a>(<a class="code" href="fixed_8h.html#a3834ad0136a8b95a6589500e4009fe9a">DTYPE</a> *data,<a class="code" href="fixed_8h.html#a3834ad0136a8b95a6589500e4009fe9a">DTYPE</a> *parity);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <a class="code" href="gr__core__api_8h.html#a8b8937b0c61edd85ab57ce8203543248">GR_CORE_API</a> <span class="keywordtype">int</span> <a class="code" href="char_8h.html#a974397d0c45a6897c0a3d72d5e571c54">DECODE_RS</a>(<a class="code" href="fixed_8h.html#a3834ad0136a8b95a6589500e4009fe9a">DTYPE</a> *data, <span class="keywordtype">int</span> *eras_pos, <span class="keywordtype">int</span> no_eras);</div>
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