https://devzone.nordicsemi.com/f/nordic-q-a/119826/issue-on-get-ms-on-zephyrHello, I’m trying to obtain millisecond precision on nRF Connect using the MCU’s internal RTC. My code: After 131000 ms, a got: Could someone help me find where my error is?en-USTelligent Community 13Fri, 14 Mar 2025 11:58:04 GMThttps://devzone.nordicsemi.com/thread/527359?ContentTypeID=1Fri, 14 Mar 2025 11:58:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eacff04b-279f-473d-b06e-07ec178cc763Luis Santos<p>Hello,</p> <p>I encountered an overflow issue when converting ticks to milliseconds using the operation:</p> <p>uint32_t ms = (total_ticks * 1000UL) / freq;</p> <p data-start="229" data-end="275">To resolve it, I modified the code as follows:</p> <div> <div>uint64_t ms = ((uint64_t)total_ticks * 1000UL) / freq;<br />LOG_INF(&quot;ticks: %u, wrap_counter: %u, total_ticks: %u, ms: %u&quot;, ticks, wrap1, total_ticks, ms);<br />return (uint32_t)ms;</div> <div><br /><br />This change prevents the overflow, but I&rsquo;m not entirely convinced it&rsquo;s the optimal solution. Could please advise on the best or recommended way to obtain milliseconds from the RTC on Zephyr?</div> </div><div style="clear:both;"></div>