Retrieve acceleration data with and without high pass filter - LIS2DW12

[ZAIDS-S23]

Greetings

Is it possible to run the LIS2DW12 accelerometer for a single sample with its high-pass filter disabled?

I am using the FIFO with the high-pass filter enabled for regular sampling on interrupt wake-up, but would like atleast a single sample on demand, with the high-pass filter disabled, after reading the FIFO data.

In my INT1 ISR, I have tried turning the filter off after reading all the samples from the FIFO, but no samples are returned. 

@Federica Bossi 

[Federica Bossi]

Hi @ZAIDS-S23 ,

I am not sure I understood the question: do you mean whether you can acquire a single sample while keeping the HPF disabled?

[ZAIDS-S23]

Yes, that is correct, but after originally enabling it and starting the sensor. 

Currently, my logic to read samples from the sensor:

- Enable HPF in CTRL6 register, enable wake-up interrupt and fifo.

- Start the sensor by writing configuration to CTRL1 register.

When the sensor wakes up, samples and stores the samples in the Fifo, i read them out. 

After reading them out, I want to obtain a single sample with the HPF disabled. 

 

[Federica Bossi]

Ok, this procedure works. When you remove the filter the effect is instantaneous so I confirm that you can acquire the single sample.