Hi everyone,
I have set up my LIS2DW12 to recognise double taps in the Z direction, which works well with the following settings:
- ODR = 400 Hz (High performance mode)
- FS = +-2g
- Low Noise Mode enabled
- Tap threshold: 0b1000 = 0.5 g
- Latency: 0x0F = 1200 ms
- Quiet: 0x03 = 30 ms
- Shock: 0x02 = 40 ms
Now I wanted to fine-tune these parameters for my application, as some collisions that should not be detected are also being detected as double-tap events.
My idea was to read the acceleration values from the output register/FIFO and send them via the UART interface of my MCU to the virtual COM port of my PC in order to recognise the characteristic waveform and derive the appropriate parameters.
My questions at this point are: Which signal does the LIS2DW12 use as input for the internal double-tap detection logic, and is it possible to output the same data via the output register/FIFO? As I know from application note AN5648 for the LIS2DU12, it uses a slope filter that is connected upstream of the S/D tap detection logic. Is this also the case with the LIS2DW12?
