BMI323_FIFO_FRAME_LENGTH
(BMI323_BYTES_PER_SAMPLE * BMI323_FIFO_FRAME_LENGTH)) - 1)
(BMI323_FIFO_FULL_IN_FRAMES * BMI323_FIFO_FRAME_LENGTH)
frame_count = fifo_lvl / BMI323_FIFO_FRAME_LENGTH;
if (fifo_lvl % BMI323_FIFO_FRAME_LENGTH)
frame = &data->fifo_buff[i * BMI323_FIFO_FRAME_LENGTH];
wtrmrk = data->watermark * BMI323_FIFO_FRAME_LENGTH;