SPI data on scope doesn&#39;t match data passed to nrf_spim_tx_buffer_sethttps://devzone.nordicsemi.com/f/nordic-q-a/103037/spi-data-on-scope-doesn-t-match-data-passed-to-nrf_spim_tx_buffer_setThe SPI data on the scope appears to be random and doesn&#39;t match the data passed to nrf_spim_tx_buffer. After a power cycle, the SPI data changes and is never 0xAA. const u_int8_t *request_ptr; u_int8_t request_value = 0xAA; request_ptr = &amp;request_value;en-USTelligent Community 13Tue, 22 Aug 2023 19:41:20 GMTRE: SPI data on scope doesn't match data passed to nrf_spim_tx_buffer_sethttps://devzone.nordicsemi.com/thread/442640?ContentTypeID=1Tue, 22 Aug 2023 19:41:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6bb4e281-6036-40d5-8bc4-9566e8005e51vang2<p>Issue has been resolved.&nbsp; There were multiple SPI transactions happening in parallel along with this.&nbsp; Plus, had to remove the const request pointer and&nbsp;passed&nbsp;a static request value instead.&nbsp; Constants are stored in flash and the DMA only works with descriptors in RAM.&nbsp; Thanks.</p><div style="clear:both;"></div>RE: SPI data on scope doesn't match data passed to nrf_spim_tx_buffer_sethttps://devzone.nordicsemi.com/thread/442569?ContentTypeID=1Tue, 22 Aug 2023 12:51:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5804d89d-5118-43dc-99bb-ac53b629e00cJared<p>Hi there,</p> <p>If you run the <a href="https://github.com/zephyrproject-rtos/hal_nordic/tree/master/nrfx/samples/src/nrfx_spim/non_blocking">nrfx spim sample</a>, what do you see on your scope?</p> <p>Do you see the same data that is configured in the project code?</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>