The gyro offset range selection is exist in very early sample stage,  in formal sample, we already disable it.  so the offset resolution is 0.061 degree / s per LSB.  I will feedback to the internal team to fix the datasheet for this describtion.  ... View more

1. BMA253 starts to normal power mode and there is no need to toggle CS pin to switch to the SPI mode.  the protocol selection is done by PS pin.  And it is start with 4 pin SPI mode by default if PS connect to GND. 2. From your describtion, you connect VDD, VDDIO, MISO, MOSI, CS, SCK, PS and GND pin, this should be good enough 3. please double check with SPI mode your host is using, we only support mode 0 and 3 in BMA253 side. 4. Can you also show how you connect the pins to your host side and your power up sequence for our sensor?   The SPI communication of BMA253 should be straight forward after power on   ... View more

For BMP388 SPI mode, when you want to read from sensor, you need to add 1 byte as dummy byte which means you always read N +1 bytes from sensor and first byte you read out is 0 as dummy byte.  Then useful data is following after the dummy bytes.  ... View more

Did you call the following API funciton in your code: 1. bma423_init 2.  bma423_write_config_file 3.   bma423_select_platform 4.   bma423_stepcounter_set_parameter Those functions should be called before the  "bma423_feature_enable(BMA423_STEP_CNTR,BMA4_ENABLE,&dev);" ... View more