add FIFO functions.

Dependents:   test_ADXL375_i2c

Changes

RevisionDateWhoCommit message
2:22b1fed9a95d 2021-06-24 ohtsuka add FIFO functions. default tip
1:91bcb4ada70c 2021-06-24 ohtsuka imported.
0:46fcf349bdca 2018-11-14 Sigma884 3???????ADXL375???????????