Help in create bitmask to i2c registry

Using Arduino Sensors
1

Hi, im want create mask to enable LPF2 ( ODR_XL/400 )

But I can't create the bitmask correctly.

CTRL8_XL(17h)

Datasheet:
https://www.st.com/resource/en/datasheet/lsm6ds3.pdf

Thanks for help !

2

HPCF_XL[1:0] = 0b11

3

To enable:
High-pass filter: ODR_XL / 400
and
LPF2: ODR_XL / 400

I do: 0b10000001 | 0b11 | 0b11

is it correct?

4

No - why would you OR something twice, in the wrong two bits?
You need to shift your mask left before ORing.

5

You can give an example ? . I do not understand.

6

If you look at the description of the CTRL8_XL register (Section 9.19, Table 66), you'll see that HPCF_XL occupies bits 6 and 5 of the register.
So, your mask needs to be shifted left 5 bits.

(Caveat: I have never used this device)

7

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