LIS2HH12 : FIFO multiple reads (burst)

Alexandre T · ‎2017-10-13

Posted on October 13, 2017 at 17:25

According to chapter 5.3.8 in LIS2HH12

, multiple reads seem possible but I don't know how (by using DMA ?) ?

It could be really useful to avoid data loss.

Any idea ?

#lis2hh12 #multiple #accelerometer #fifo

Miroslav BATEK · ‎2017-10-16

Posted on October 16, 2017 at 15:20

It is a question of your microcontroller, you have to use a SPI transaction which is able to read more than one byte. DMA is not mandatory.

You can first read a register FIFO_SRC to get number of items in FIFO and then read all the bytes from FIFO in one SPI transaction.

Miroslav BATEK · ‎2017-10-16

Posted on October 16, 2017 at 15:20

It is a question of your microcontroller, you have to use a SPI transaction which is able to read more than one byte. DMA is not mandatory.

You can first read a register FIFO_SRC to get number of items in FIFO and then read all the bytes from FIFO in one SPI transaction.