LIS3DH simultaneous free-fall interrupt and normal XYZ operation

[rep]

Hi

Is it possible to configure the interrupt function for free-fall with normal XYZ polled operation, or is it better to use the interrupt in low power mode and performing the free-fall via normal XYZ programmatically in normal operation?

Thanks!

 

[Federica Bossi]

Hi @rep ,

Yes, it is possible to configure the LIS3DH interrupt function for free-fall detection while running normal XYZ data acquisition in polled mode.

You can find an example of free fall detection on AN3308.

[rep]

Hi Frederica

 

Thanks for the information. Last question: Does the LIR_INT1 bit in CTRL_REG5 latch the pin or just the INT1_SRC register bits?  

Thanks!

[Federica Bossi]

Hi @rep ,

The LIR_INT1 bit latches the interrupt pin based on the INT1_SRC register flags.
The pin remains asserted until the INT1_SRC register is read and cleared.