Recent posts to 10 bit calculation? Help.https://forge.codesys.com/forge/talk/Runtime/thread/02754b11a6/2020-02-27T17:32:11.442000ZRecent posts to 10 bit calculation? Help.10 bit calculation? Help.2020-02-27T17:32:11.442000Z2020-02-27T17:32:11.442000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com69c1b27366fd842a8fbf7d866868bbd79c70baa1<div class="markdown_content"><p><em>Originally created by:</em> D. Kugler</p>
<p>don't be ashamed, mistakes are there, to be done and do it better at next time </p></div>10 bit calculation? Help.2020-02-27T17:32:08.572000Z2020-02-27T17:32:08.572000Zklimahttps://forge.codesys.com/u/klima/https://forge.codesys.com62e31f685a8b4963516adaa212ff589fac0bca6a<div class="markdown_content"><p>I made a mistake with coding left to right bytes, that's why the standard approach didn't work, only switching to the 01 variable view help. Everything works as expected.</p>
<p>In <strong>C</strong> Im coded like that:<br/>
byte_a<span>[0]</span> = sum_of_bits | ((value >> 2) & 0xc0);<br/>
byte_b<span>[1]</span> = value & 0xff;</p>
<p>Working code:<br/>
value as int.<br/>
byte_of_bits as byte -> sum of bools (bits) from 0 to 5.<br/>
byte_a, byte_b as byte.</p>
<hr/>
<p>byte_a := byte_of_bits + SHL(to_byte(value),6);<br/>
byte_b := to_byte(value);</p>
<hr/>
<p>D. Kugler - Your code and method working great too <br/>
Thank You for help!<br/>
What a shame, a mistake in the coding method <strong>little endian vs big endian</strong> oh.</p></div>10 bit calculation? Help.2020-02-27T17:32:07.498000Z2020-02-27T17:32:07.498000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com8594fe44b12e655d1cd062af7f0b8f6bd67714cf<div class="markdown_content"><p><em>Originally created by:</em> D. Kugler</p>
<p>declarate a WORD:</p>
<p>VAR<br/>
WordCalc : WORD;<br/>
END_VAR</p>
<p>//convert value to WORD and shift left 6 times, bits 0-5 are false now, value is in bit 6-15<br/>
WordCalc:= SHL(TO_WORD(value),6);<br/>
<a class="" href="https://help.codesys.com/webapp/_cds_operator_shl;product=codesys;version=3.5.15.0" rel="nofollow">https://help.codesys.com/webapp/_cds_op ... n=3.5.15.0</a><br/>
//then store uppers and lowers to your bytes:<br/>
first_byte:= TO_BYTE(WordCalc); //the bits 8-15 are ignorred<br/>
next_byte:= TO_BYTE(SHR(WordCalc,8)); //Shift bits 8-15 to 0-7 before writing <br/>
//Add the bits 0-5, attention := !!<br/>
first_byte.0 := b1; <br/>
...<br/>
...</p></div>10 bit calculation? Help.2020-02-27T17:32:04.630000Z2020-02-27T17:32:04.630000Zklimahttps://forge.codesys.com/u/klima/https://forge.codesys.com7d109d1bf0a9f19f42d45118cc01e2f2abdf4db7<div class="markdown_content"><p>Hello, anyone can help me to calculate 10 bit in 2 bytes ?<br/>
<span>[1-6]</span> + ( <span>[7-8]</span> + <span>[9-16]</span> ) need insert value 0 - 1000 in (7-16) added first 1 - 6 bits to 7 - 16 ? how to code this in st ?</p>
<hr/>
<p>b1,b2,b3.b4,b5,b6:bool;<br/>
first_byte : byte;<br/>
next_byte :byte;<br/>
value : int; (<strong> 0 - 1000 </strong>)</p>
<p>first_byte.0 = b1;<br/>
first_byte.1 = b2;<br/>
first_byte.2 = b3;<br/>
first_byte.3 = b4;<br/>
first_byte.4 = b5;<br/>
first_byte.5 = b6;<br/>
(<strong> b7 to b14 represent 0 - 1000 </strong>)</p>
<p>And how to insert 0 - 1000 value start from <strong>first_byte.6</strong> and use all(8bit) <strong>next_byte</strong> ?</p></div>