Converts the string into the equivalent Hex buffer. </p>
<p>Function used to convert the string to Hex in Little Endian format.</p>
<pre class="fragment"> Ex: "abc123" -&gt; {0xab, 0xc1, 0x23}
</pre><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">Str</td><td>is a Input String. Will support the lower and upper case values. Value should be between 0-9, a-f and A-F</td></tr>
    <tr><td class="paramname">Buf</td><td>is Output buffer. </td></tr>
    <tr><td clas