nrfx_spim_xfer_desc_t xfer_desc = NRFX_SPIM_XFER_TRX(data, size, NULL, 0); APP_ERROR_CHECK(nrfx_spim_xfer_dcx(&spi, &xfer_desc, 0, 1)); // first byte is always the command byte while (!spi_xfer_done) { __WFE(); } } This works fine if data is a co...