https://devzone.nordicsemi.com/f/nordic-q-a/112837/using-zephyr-flash-driver-with-custom-spi-driverHi, I am using an external flash on the NRF52840DK via SPI and have established working communication with the flash memory. However, I need to disable CONFIG_SPI and CONFIG_GPIO in the current project because we use input capture, whichen-USTelligent Community 13Mon, 08 Jul 2024 14:33:29 GMThttps://devzone.nordicsemi.com/thread/492764?ContentTypeID=1Mon, 08 Jul 2024 14:33:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d4708cd8-980d-4b8d-b115-4b71819ea75eAmanda Hsieh<p>Hi,&nbsp;</p> <p>May I know your intention for using&nbsp;<span>external flash? To use&nbsp;external flash for mcuboot or develop it as <a href="https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/drivers/spi_flash">this driver</a>?</span></p> <p><span>You can refer to <a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-7-device-driver-model/topic/driver-implementation/#Writing-Device-Drivers-in-Zephyr">this tutorial</a> to write a custom device driver in Zephyr or check <a href="https://devzone.nordicsemi.com/f/nordic-q-a/91021/mcuboot-adding-custom-serial-flash-driver-as-secondary-partition/383961">this post</a> which explains how to add an out of tree custom driver to zephyr/drivers/flash (no patching of Zephyr).&nbsp;&nbsp;</span></p> <p><span>Regards,<br />Amanda H.</span></p><div style="clear:both;"></div>