Power Management

[Tejaswini]

Hi,
 

  I am started working on nRF9160 Power Management.
  I want to power down all devices(sleep mode) expect motion sensor, Wake if motion is detected.
  I went through System power On and system power off modes, many are suggesting to use System power On mode.
  Not quite sure where to start to look for resources on this. Any documentation you can point me to?

  Thank You.

[Håkon Alseth]

Hi,

 

  I want to power down all devices(sleep mode) expect motion sensor, Wake if motion is detected.
  I went through System power On and system power off modes, many are suggesting to use System power On mode.

 To enter idle, you can force this using k_cpu_idle(), which is the systemon idle mode.

Other modes, like k_sleep(ms) also do the same, and wakes you up after the "ms" has expired.

 

Kind regards,

Håkon

[praveenpalaparthi]

Hi,

I am also working on power management in nRF9160 and was referring to the document 

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/reference/power_management/index.html#system-power-management

I have my own example where i initialized two threads- one thread will wait for data to receive from UART peripheral and pass to the other thread. Which means two threads are in waiting mode and waiting for events

As per the above information if no thread is running and If  CONFIG_SYS_POWER_MANAGEMENT Kconfig option is enabled then the Power Management Subsystem will put into idle mode.

So I have enabled CONFIG_SYS_POWER_MANAGEMENT, CONFIG_DEVICE_POWER_MANAGEMENT and CONFIG_NRFX_POWER options from menu config.

After running the program in debug mode I found that it is directly going to sys_power_save_idle() function in idle.c file without executing my two threads.