Recent posts to Set several bits in WORDhttps://forge.codesys.com/forge/talk/CODESYS-V2/thread/77dd327de3/2024-04-22T18:29:00.780000ZRecent posts to Set several bits in WORDSet several bits in WORD2024-04-22T18:29:00.780000Z2024-04-22T18:29:00.780000Zstdenitshttps://forge.codesys.com/u/stdenits/https://forge.codesys.com9c75357e32ee339a693e4eba77a49bb65905ac90<div class="markdown_content"><p>Hello.</p>
<p>I am using Codesys v2.3 and trying to adapt a function from C to set multiple bits of a uint16_t variable at once:</p>
<div class="codehilite"><pre><span></span><code><span class="nb nb-Type">void</span><span class="w"> </span><span class="n">set_state_value_16b</span><span class="p">(</span><span class="n">uint16_t</span><span class="w"> </span><span class="o">*</span><span class="k">var</span><span class="p">,</span><span class="w"> </span><span class="n">uint16_t</span><span class="w"> </span><span class="n">mask</span><span class="p">,</span><span class="w"> </span><span class="n">uint16_t</span><span class="w"> </span><span class="n">val</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="o">*</span><span class="k">var</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="o">*</span><span class="k">var</span><span class="w"> </span><span class="o">&</span><span class="w"> </span><span class="o">~</span><span class="n">mask</span><span class="p">)</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">(</span><span class="n">val</span><span class="w"> </span><span class="o">&</span><span class="w"> </span><span class="n">mask</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div>
<p>Current Codesys v2.3 implementation:</p>
<div class="codehilite"><pre><span></span><code><span class="n">FUNCTION</span><span class="w"> </span><span class="n">set_state_value_16b</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">WORD</span>
<span class="n">VAR_INPUT</span>
<span class="w"> </span><span class="n">variable</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">POINTER</span><span class="w"> </span><span class="n">TO</span><span class="w"> </span><span class="n">UINT</span><span class="p">;</span>
<span class="w"> </span><span class="n">mask</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">WORD</span><span class="p">;</span>
<span class="w"> </span><span class="n">val</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">WORD</span><span class="p">;</span>
<span class="n">END_VAR</span>
<span class="n">VAR</span>
<span class="n">END_VAR</span>
<span class="n">variable</span><span class="o">^</span><span class="w"> </span><span class="p">:</span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">variable</span><span class="o">^</span><span class="w"> </span><span class="n">AND</span><span class="w"> </span><span class="n">NOT</span><span class="w"> </span><span class="n">mask</span><span class="p">)</span><span class="w"> </span><span class="n">OR</span><span class="w"> </span><span class="p">(</span><span class="n">val</span><span class="w"> </span><span class="n">AND</span><span class="w"> </span><span class="n">mask</span><span class="p">);</span>
</code></pre></div>
<p>Example of use:</p>
<div class="codehilite"><pre><span></span><code>set_state_value_16b(ADR(ERR), 16#0001, 16#0);
</code></pre></div>
<p>, where is ERR is a TAGged submenu UINT item at PLC.</p>
<p>Could somebody help me to fix function?</p></div>