Hello,
I am trying to use an accelerometer LIS2DUXS12 in ultralow power mode using the FIFO with a threshold. To initialize it, I configure the registers using the driver's functions in this order:
- sw reset
- init set
- fifo_mode_set (operation = LIS2DUX12_BYPASS_MODE to reset the FIFO,
store = LIS2DUX12_FIFO_1X and xl_only = 1)
- fifo_batch_set (dec_ts = LIS2DUX12_DEC_TS_OFF and bdr_xl = LIS2DUX12_BDR_XL_ODR)
- fifo_mode_set (operation = LIS2DUX12_FIFO_MODE, store = LIS2DUX12_FIFO_1X and xl_only = 1)
- fifo_watermark_set
- fifo_stop_on_wtm_set
- pin_int2_route_set
- mode_set
I use odr=25Hz ULP, fs = 2g.
Everything works fine as long as I set
store = LIS2DUX12_FIFO_1X
and
bdr_xl = LIS2DUX12_BDR_XL_ODR
but as soon as I add a divider to BDR (for example I set bdr_xl = LIS2DUX12_BDR_XL_ODR_DIV_2), the FIFO remains empty forever.
Same result if I use
store = LIS2DUX12_FIFO_2X instead of store = LIS2DUX12_FIFO_1X.
I read the number of elements in FIFO after a timeout with lis2dux12_fifo_data_level_get(..)
I tried also with 3Hz ULP and the outcome is the same, so I am wondering if ultralow power mode prevents the use of FIFOx2 and/or BDR dividers, or if something is missing in my configuration. There is nothing regarding this in the datasheet and I can't find any examples.
Could someone please help?
Edit: I am using LIS2DUX12 driver even if I actually have a LIS2DUXS12 (for some project reasons), assuming nothing changes for what I am trying to do here (and it shouldn't looking at the code and datasheet).
