Recent posts to MemFillhttps://forge.codesys.com/forge/talk/Engineering/thread/8507e31953/2020-02-27T14:07:16.647000ZRecent posts to MemFillMemFill2020-02-27T14:07:16.647000Z2020-02-27T14:07:16.647000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com965053bd9bb4a08cfe13458cf9b343a090b84f3e<div class="markdown_content"><p><em>Originally created by:</em> Viacheslav Mezentsev</p>
<p>Try this.</p>
<div class="codehilite"><pre><span></span><span class="nv">program</span> <span class="nv">PLC_PRG</span>
<span class="nv">var</span>
<span class="nv">b</span>: <span class="nv">bool</span> :<span class="o">=</span> <span class="nv">true</span><span class="c1">;</span>
<span class="nv">sz</span>: <span class="nv">uint</span><span class="c1">;</span>
<span class="nv">sText</span>: <span class="nv">string</span> :<span class="o">=</span> <span class="s1">'</span><span class="s">HELLO</span><span class="s1">'</span><span class="c1">;</span>
<span class="nv">end_var</span>
<span class="k">if</span> <span class="nv">b</span> <span class="k">then</span>
<span class="nv">sz</span> :<span class="o">=</span> <span class="nv">len</span><span class="ss">(</span> <span class="nv">sText</span> <span class="ss">)</span><span class="c1">;</span>
<span class="nv">Mem</span>.<span class="nv">MemFill</span><span class="ss">(</span> <span class="nv">adr</span><span class="ss">(</span> <span class="nv">stext</span> <span class="ss">)</span>, <span class="nv">sz</span>, <span class="mi">16</span><span class="sc">#31</span> <span class="ss">)</span><span class="c1">; // 0x31 = '1'</span>
<span class="nv">b</span> :<span class="o">=</span> <span class="nv">false</span><span class="c1">;</span>
<span class="nv">end_if</span>
</pre></div>
<p>sText is ASCII<strong>Z</strong> string. So 0x00 is the mark of the end of string.</p></div>MemFill2020-02-27T14:07:16.300000Z2020-02-27T14:07:16.300000Zedmondhttps://forge.codesys.com/u/edmond/https://forge.codesys.com090918f9ffe4ae20c2acb5198d16e60ca4e82535<div class="markdown_content"><p>hi, <br/>
how to use MemFill Function?</p>
<div class="codehilite"><pre><span></span><span class="nt">sText</span><span class="o">:=</span><span class="s1">'HELLO'</span><span class="o">;</span>
<span class="nt">mem</span><span class="p">.</span><span class="nc">MemFill</span><span class="o">(</span><span class="nt">ADR</span><span class="o">(</span><span class="nt">stext</span><span class="o">),</span><span class="nt">2</span><span class="o">,</span><span class="nt">7</span><span class="o">);</span>
</pre></div>
<p>Result is '$07$07LLO' , first 2 bytes change.</p>
<p>after that i try 0 instead of 7,</p>
<div class="codehilite"><pre><span></span><span class="nt">sText</span><span class="o">:=</span><span class="s1">'HELLO'</span><span class="o">;</span>
<span class="nt">mem</span><span class="p">.</span><span class="nc">MemFill</span><span class="o">(</span><span class="nt">ADR</span><span class="o">(</span><span class="nt">stext</span><span class="o">),</span><span class="nt">2</span><span class="o">,</span><span class="nt">0</span><span class="o">);</span>
</pre></div>
<p>Result of sText is '', nothing left. <br/>
Why?</p></div>