https://devzone.nordicsemi.com/f/nordic-q-a/68436/openocd-vs-j-link-debug-host-toolsHi, Any advantages using OpenOCD over J-Link Debug Host Tools to debug Zephyr RTOS application? Thanks, Hardiken-USTelligent Community 13Tue, 17 Nov 2020 09:48:36 GMThttps://devzone.nordicsemi.com/thread/280285?ContentTypeID=1Tue, 17 Nov 2020 09:48:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e09985ac-6262-4596-be4e-62d434d35b6eH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>JLink tools support our tool &quot;nrfjprog&quot;, which has nRF specific commands. This is supported by us.</p> <p>OpenOCD has some support for these, but it&nbsp;depends&nbsp;on which version you&#39;re using. This is supported by a 3rd party community.</p> <p>One big plus for openocd is the thread awareness which is supported in zephyr:&nbsp;<a href="https://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_OPENOCD_SUPPORT.html">https://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_OPENOCD_SUPPORT.html</a></p> <p>JLink does not have&nbsp;zephyr-awareness in their gdbserver yet (see the docs here:&nbsp;<a href="https://docs.zephyrproject.org/latest/guides/debugging/host-tools.html#j-link-debug-host-tools">https://docs.zephyrproject.org/latest/guides/debugging/host-tools.html#j-link-debug-host-tools</a>), but there is support for Segger SystemViewer:&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/tracing/index.html#segger-systemview-support">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/tracing/index.html#segger-systemview-support</a></p> <p>&nbsp;</p> <p>My suggestion is that you can try both DAPlink and JLink and evaluate which one suits your development needs.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>