https://forge.codesys.com/forge/talk/CODESYS-V2/thread/9ad62662d6/2021-01-10T16:01:18.469000ZRecent posts to CODESYS bit count in a word2021-01-10T16:01:18.469000Z2021-01-10T16:01:18.469000Zwollviehhttps://forge.codesys.com/u/wollvieh/https://forge.codesys.com09c90003bf858509d297edc64d32751c5ab4aa16

<div class="markdown_content"><p>How about that ...</p></div>

2021-01-10T15:18:48.875000Z2021-01-10T15:18:48.875000Zsgronchihttps://forge.codesys.com/u/sgronchi/https://forge.codesys.com3843116e558fd1c1bacec64ff0858b4604f70ba3

<div class="markdown_content"><p><a href="https://help.codesys.com/webapp/_cds_operands_variables_accessing_bits;product=codesys;version=3.5.15.0" rel="nofollow">https://help.codesys.com/webapp/_cds_operands_variables_accessing_bits;product=codesys;version=3.5.15.0</a><br/> The index must be a constant.</p></div>

2021-01-09T17:14:57.524000Z2021-01-09T17:14:57.524000Zh-hermsenhttps://forge.codesys.com/u/hermsen/https://forge.codesys.com7863eac9ee5ed3ae6b538f3b82dfe428cc9ccbc3

<div class="markdown_content"><p>The following is pseudocode, don't take it too literal allthough I guess it will probably run ;-)</p> <div class="codehilite"><pre><span></span><span class="c">(* DECLARATION *)</span> <span class="n">VAR</span> <span class="n">size</span><span class="o">,</span> <span class="n">i</span> <span class="o">:</span> <span class="n">INT</span><span class="o">;</span> <span class="n">Bitcount</span> <span class="o">:</span> <span class="n">INT</span> <span class="o">:=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">CurBoolVal</span> <span class="o">:</span> <span class="n">BOOL</span><span class="o">;</span> <span class="n">TheWordIWantToCheck</span> <span class="o">:</span> <span class="n">WORD</span><span class="o">;</span> <span class="n">END_VAR</span> <span class="c">(* CODE *)</span> <span class="n">size</span> <span class="o">:=</span> <span class="n">SIZE_OF</span><span class="o">(</span><span class="n">TheWordIWantToCheck</span><span class="o">);</span> <span class="c">(* dependends on processor memory width but I assume 16 for now *)</span> <span class="n">FOR</span> <span class="n">i</span> <span class="o">:=</span> <span class="mi">0</span> <span class="n">TO</span> <span class="n">size</span> <span class="o">-</span> <span class="mi">1</span> <span class="n">DO</span> <span class="c">(* eg. count bit 0 to 15 *)</span> <span class="n">CurBoolVal</span> <span class="o">:=</span> <span class="n">TheWordIWantToCheck</span><span class="o">.</span><span class="n">i</span><span class="o">;</span> <span class="c">(* Helper to cast Bit to Bool *)</span> <span class="n">BitCount</span> <span class="o">:=</span> <span class="n">BitCount</span> <span class="o">+</span> <span class="n">BOOL_TO_INT</span><span class="o">(</span><span class="n">CurBoolVal</span><span class="o">);</span> <span class="c">(* cast Bit to Bool *)</span> <span class="n">END_FOR</span><span class="o">;</span> <span class="c">(* after this loop has ended, BitCount will contain the counted bits that are TRUE in the word *)</span> </pre></div> </div>

2021-01-09T16:42:57.265000Z2021-01-09T16:42:57.265000Zwollviehhttps://forge.codesys.com/u/wollvieh/https://forge.codesys.comfd0b7afc09a839e66f4d2c6336a2dc9b26a9820d

<div class="markdown_content"><p>Do yo know the Bitoperator, for examaple Byte.0, Byte.1, or Word.0... Word.15 ? You could build a loop and, depending on the state of the Bitstate, count the state of the Bits. </p></div>

2021-01-09T12:36:15.825000Z2021-01-09T12:36:15.825000Zmlepinehttps://forge.codesys.com/u/mlepine/https://forge.codesys.com99a84e67a2c42bdb06ce8f23c9291c9f40c32f9e

<div class="markdown_content"><p>Hi Every body,</p> <p>I'm pretty new here and i'm trying to put in place a function that will count the number of bit that are SET in a word or a Dword.</p> <p>Could some body help me ?</p> <p>Thk in advance</p></div>