https://devzone.nordicsemi.com/f/nordic-q-a/49067/nrfx_spim---constant-tx-and-rx-lengthsHi, I have merged nrfx_spi and ble_app_uart examples. I am working with SDK15.3 on a nRF52832 based ISP1507. I seem to be able to transmit the data stored in the tx buffer successfully. However, I still have things to modify and adapt. As far as I understanden-USTelligent Community 13Mon, 01 Jul 2019 10:08:50 GMThttps://devzone.nordicsemi.com/thread/195581?ContentTypeID=1Mon, 01 Jul 2019 10:08:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5387b4a2-00ec-4099-af62-22bea52c12f8Den<p>Thanks very much for the confirmation Jorgen.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/195564?ContentTypeID=1Mon, 01 Jul 2019 09:04:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b3324e51-2da4-4220-bf1f-ba99c2d943f4J&#248;rgen Holmefjord<p>Hi,</p> <p>This is correct, you will create a xfer_desc for each transfer type, with the tx_buffer, rx_buffer, and lengths of each buffer, set to the correct values. If you want, you can reuse the buffers as long as you make sure to not modify it before the previous transfer is completed. Just fill/clear the buffers, and set the correct length in the xfer_desc.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>