nrf_pwr_mgmt_run() with SoftDevice not go to low power

[Bar]

Hello.

I use SDK16 in my project.

Previously when I want to go on sleep I use __WFI(), and get into sleep till interrupt. Because I use The SoftDevice I change the command to nrf_pwr_mgmt_run() as instruct by Nordic . But now it doesn't enter sleep at all. I try also disable the FPU by NRF_PWR_MGMT_CONFIG_FPU_SUPPORT_ENABLED 0 in the sdk_config.h but didn't help.

Why it is so?

Bar.

[Bar]

Hi Jared.

I found also something strange about implement the _WFE()

In some examples I found it set like this 

__WFE();

__SEV();
__WFE();

but using it won't get it to low power 

But know during reading about sd_app_evt_wait();

I found it is written like this

__SEV();
__WFE();

__WFE();

This one work.

So maybe inside  sd_app_evt_wait();

It still use the wrong setting

__WFE();

__SEV();
__WFE();

(I can't look inside this function at my SDK)?

Bar.

[Jared]

Hi,

Thank you for your observations.

Could you upload a minimal project that reproduces the issue and will run on the nRF52840 DK? I'll try to reproduce it and see if I can find the root cause. 

best regards

Jared