On lis2dw12, Enabling routing the Sleep state/change interrupts causing the sleep state bit on wake_up_src to get stuck on value 1

[SHala.2]

when I'm NOT enabling routing the Sleep state/change (setting CTRL5_INT2_PAD_CTRL to 0x00) I'm getting I regular good behavior of the SLEEP_STATE_IA bit (1 and 0 according to the wu cfg) HOWEVER, when I set CTRL5_INT2_PAD_CTRL to 0xC0 or 0x40, the bit: SLEEP_STATE_IA stay constantly on 1,

Can you please help me?

thanks!

[Federica Bossi]

Hi @SHala.2​ ,

The following routine describes how to route the sleep change event on the INT2 pin:

1. Write 50h in CTRL1 // Turn on the accelerometer // ODR = 200 Hz, FS = ±2 g

2. Write 02h in WAKE_UP_DUR // Set duration for inactivity detection

3. Write 42h in WAKE_UP_THS // Set activity/inactivity threshold // Enable activity/inactivity detection

4. Write 40h in CTRL5_INT2_PAD_CTRL // Sleep change interrupt driven to INT2 pin

5. Write 20h in CTRL7 // Enable interrupts

In case you want to route INT2 pin on INT1 you need to follow the same steps but writing 60h in CTRL7.

Note that the bit SLEEP_STATE_IA is 1 when a sleep event is detected:

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[SHala.2]

Hey Fredrica,

thank you for your answer,

When I set the configuration you suggested,

It ONLY work when I set this configuration, then, turn the device on(by connection to power cable) and then changing the configuration where the value of CTRL5_INT2_PAD_CTRL  is 0x00 and then turn on again.

do you have Idea why is this happening?

Thanks!