https://devzone.nordicsemi.com/f/nordic-q-a/84430/zephyr-fatal-error-while-using-nrfx_spim_xfer-with-interrupt-on-nrf52840Hello everyone, I&#39;m now having a problem while using nrfx_spim_xfer on nrf52840. I want to use nrfx_spim_xfer with a callback when transmitting is done. My setup code is below: However, it is not working and the system log is below: *** Bootingen-USTelligent Community 13Mon, 07 Feb 2022 15:16:58 GMThttps://devzone.nordicsemi.com/thread/351599?ContentTypeID=1Mon, 07 Feb 2022 15:16:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1c18b38-7ed4-4701-9e38-f52756441d7bVidar Berg<p>Hello,</p> <p>When using nrfx drivers directly, you need to use the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.8.0/zephyr/reference/kernel/other/interrupts.html#c.IRQ_CONNECT">IRQ_CONNECT</a>() macro to connected the IRQ to the drivers IRQ handler. For SPIM0, that is&nbsp;<strong></strong>the <a href="https://github.com/zephyrproject-rtos/hal_nordic/blob/b1db86f188c3c5864985e1bd18a849d53f1c0a2d/nrfx/mdk/nrf52833.h#L89">SPIM0 IRQ </a>to the <strong>nrfx_spim_0_irq_handler </strong>driver handler. Similar to how we do in the nRFx GPIOTE driver sample here: <a href="https://github.com/nrfconnect/sdk-zephyr/blob/d5a653348eeab5a3bd6305e4f1cd2d6dcf56774a/samples/boards/nrf/nrfx/src/main.c#L35">https://github.com/nrfconnect/sdk-zephyr/blob/d5a653348eeab5a3bd6305e4f1cd2d6dcf56774a/samples/boards/nrf/nrfx/src/main.c#L35</a></p> <p>Best regards,</p> <p>Vidar</p> <p><strong>Edit: </strong>I put together a sample based on the code you posted above and tested it against the <span class="item"><a title="SPI Slave Example" href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/spi_slave_example.html?cp=8_1_4_6_39">SPI Slave Example</a></span> running on another DK:</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/4353.nrfx_5F00_spim.zip">devzone.nordicsemi.com/.../4353.nrfx_5F00_spim.zip</a></p><div style="clear:both;"></div>