https://devzone.nordicsemi.com/f/nordic-q-a/51201/configuring-spis3-on-nrf9160What are all the configuration options necessary to configure the nRF9160 as a SPI slave? I&#39;m working with a custom board and have specific DTS files I&#39;m working with. Here are all the config options in my board_defconfig file: CONFIG_ARM=y CONFIG_SOC_FAMILY_NRFen-USTelligent Community 13Fri, 23 Aug 2019 07:01:26 GMThttps://devzone.nordicsemi.com/thread/205748?ContentTypeID=1Fri, 23 Aug 2019 07:01:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:22274d4a-4719-44c4-9d44-47d0f16edd5b&#216;yvind<p>You are welcome! Very glad to hear that it solved the case!&nbsp;<br /><br />Kind regards,<br />Øyvind</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205707?ContentTypeID=1Thu, 22 Aug 2019 21:41:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:780f85e7-26a1-4062-aaa2-58dfe0e68b40Chris Burns<p>This turned out to be the solution:</p> <ul> <li>Adding these lines to my prj.conf (could also go in the defconfig file for the board) <ul> <li># Enable SPI driver<br />CONFIG_SPI=y<br />CONFIG_SPI_SLAVE=y<br />CONFIG_SPI_3_NRF_SPIS=y<br /># 2 = slave only<br />CONFIG_SPI_3_OP_MODES=2</li> </ul> </li> <li>Adding an overlay file for the project with these lines: <ul> <li>&amp;spi3 {<br /> compatible = &quot;nordic,nrf-spis&quot;;<br /> status = &quot;okay&quot;;<br /> mosi-pin = &lt;17&gt;;<br /> miso-pin = &lt;18&gt;;<br /> sck-pin = &lt;19&gt;;<br /> csn-pin = &lt;21&gt;;<br /> def-char = &lt;0x00&gt;;<br />};</li> </ul> </li> </ul> <p>Doing this allowed it to build, and I can see the data being transferred between the master and slave appropriately.</p> <p>Thanks for your help!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205270?ContentTypeID=1Wed, 21 Aug 2019 10:54:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:16b48476-c964-452f-8988-a37ea0fb9f72&#216;yvind<p>Hello,&nbsp;</p> <p></p> <p>A similar case was <a href="https://devzone.nordicsemi.com/f/nordic-q-a/50677/nrf9160-spi-slave-example-code/202573#202573">answered here</a>.&nbsp;According to the answer, my colleague Andreas gives, the only thing you could try to remove is:</p> <p><pre class="ui-code" data-mode="text">CONFIG_SPI_NRFX=y</pre><br /><br />Give it a try and let me know how that works.</p> <p>Kind regards,<br />Øyvind</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205147?ContentTypeID=1Tue, 20 Aug 2019 23:22:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c218ca3c-dc15-4e55-99ff-3898dd3c3d81Chris Burns<p>I should also mention that the SPM builds successfully. The above failure happens in the non-secure application.</p><div style="clear:both;"></div>