https://devzone.nordicsemi.com/f/nordic-q-a/44090/passing-argument-waringHI, I am working on NRF52832 SOC. with SDK 15. where i need to read the SENSOR data from twi protocol. Common Write and Read Register function has been created I receive some warnings like IMPLICIT DECLARATION, INCOMPATIBLE POINTERS Write_registeren-USTelligent Community 13Mon, 25 Feb 2019 11:29:45 GMThttps://devzone.nordicsemi.com/thread/172726?ContentTypeID=1Mon, 25 Feb 2019 11:29:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0cdfd179-74bd-480f-a216-57ce0dd112dfawneil<p>The important thing when dealing with compiler diagnostics (errors &amp; warning) is always to <strong>address the earliest message <span style="text-decoration:underline;"><em>first</em></span>.</strong></p> <p>This is because later messages&nbsp;are often a direct result of the earlier problems - so fixing the earliest will also fix all of those!</p> <p></p> <p>The &#39;C&#39; programming language requires that everything must be declared <em><strong>before</strong> </em>it is used.</p> <p>If you don&#39;t explicitly provide a declaration, the compiler may assume a default - or <em>&quot;implicit&quot;</em> - declaration.</p> <p>The first warning is telling you that this has happened!</p> <p>The subsequent warnings may well be because the compiler&#39;s&nbsp;<em>&quot;implicit&quot;</em><span>&nbsp;&nbsp;declaration does not match what you actually want - so fix this problem first.</span></p> <p><span>Note that all of this is standard &#39;C&#39; stuff - nothing specifically to do with Nordic or Segger Embedded Studio.</span></p><div style="clear:both;"></div>