What is the correct way to enable the FIFO interrupt in LIS2DH12?

[jeranio]

Hi @otso ,
sorry for the late response and thanks for your reply.

@otso

On a quick look, it seems to me that this is the case. Do you read the FIFO completely when the interrupt is triggered? If not, here’s what would happen:

1. FIFO gets full → interrupt
2. data_get is called → 1 element is read → FIFO has space for new element
3. FIFO gets full → interrupt
4. Back to 2.

Yes, I was just logging instead of reading the FIFO buffer, and your explanation makes perfect sense. I should’ve tried to read the FIFO buffer before asking you this question about FIFO interrupts.

@otso

I hope this helps, driver/integration_tests folder also has test for FIFO interrupts which provides a sample on how the FIFO can be read.

By the way, I followed your advice and edited my code according to this and, indeed, by reading the FIFO buffer every time an interrupt occurs, the buffer is cleared and this, in turn, let the interrupt timings to be the expected one.

Thanks again for your response