https://devzone.nordicsemi.com/f/nordic-q-a/116707/failed-to-perform-spi-read-function-on-nrf52840dk-with-bmi270-sensorHello, I am trying to use SPI driver to read BMI270 IMU data on my nRF52840dk. I stucked at verifying the sensor ID step. According to the datasheet, sensor ID is stored at register 0x00 and has a default value of 0x24. But I always read a 0x00. Ien-USTelligent Community 13Tue, 26 Nov 2024 13:28:40 GMThttps://devzone.nordicsemi.com/thread/512133?ContentTypeID=1Tue, 26 Nov 2024 13:28:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a05c8747-ba19-466b-83b0-74ed0cd907e8Shuhao Dong<p>Problem solved: I misunderstand the buffer management in bmi_read_reg function. I only set rx_spi_bufs as 1D but as a matter of fact it should be 2D, where rx_spi_bufs[0] is the dummy byte part of length 2 because of the additional dummy byte generated from the sensor and the byte received during writing operation. And rx_spi_bufs[1] should be the actual data of length size.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/512095?ContentTypeID=1Tue, 26 Nov 2024 12:23:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3e721b3d-d61d-443e-84c4-2221b273dff6Shuhao Dong<p>After reading the datasheet again, reading BMI270 sensor via SPI will always give a dummy byte between command byte and data byte. So when to use transeive function, I should read 3 bytes (command, dummy, data) rather than 2. I tried to read 3 bytes but it is still reporting 0s for all 3 bytes.&nbsp;</p><div style="clear:both;"></div>