Power Saving(System off Mode)

RE: Power Saving(System off Mode)

Kenneth — Thu, 03 Mar 2022 21:04:22 GMT

Sorry for the misunderstanding, but "debug" mode in my last reply refer to the chip is in "programming" mode after programming firmware before the chip is power cycled. It does not refer to building your application with release or debug.

So make sure you power cycle the board before testing.

Kenneth

RE: Power Saving(System off Mode)

Muqarrab — Thu, 03 Mar 2022 13:27:37 GMT

I have changed to release mode but still getting the following error.

RE: Power Saving(System off Mode)

Kenneth — Thu, 03 Mar 2022 13:06:27 GMT

If you are in debug mode then this will not work as intended, see here:
https://devzone.nordicsemi.com/f/nordic-q-a/18075/nrf52-does-not-enter-system-off/69710#69710

Kenneth

RE: Power Saving(System off Mode)

Muqarrab — Thu, 03 Mar 2022 12:36:20 GMT

I have made a timer of like 10 sec in which I am calling this function to save power. and getting the following error.

RE: Power Saving(System off Mode)

Kenneth — Thu, 03 Mar 2022 12:28:24 GMT

I suggest to use nrf_gpio_cfg_sense_set() directly instead of bsp_wakeup_button_enable(), e.g.:

nrf_gpio_cfg_sense_set(Interrupt_Pin, NRF_GPIO_PIN_SENSE_LOW);

Kenneth

RE: Power Saving(System off Mode)

Muqarrab — Thu, 03 Mar 2022 08:58:17 GMT

Here is the error.

RE: Power Saving(System off Mode)

Kenneth — Wed, 02 Mar 2022 15:53:52 GMT

If you build with debug (instead of release) then you should get information about failure, e.g. file name, line number and error code.

Kenneth

RE: Power Saving(System off Mode)

Muqarrab — Wed, 02 Mar 2022 14:19:40 GMT

Thanks for the reply. I have made this function but when I called this I am getting the following error.

RE: Power Saving(System off Mode)

Kenneth — Wed, 02 Mar 2022 12:49:41 GMT

idle_state_handle() with nrf_pwr_mgmt_run() should be used in the for(;;) loop in main() to ensure that the CPU go to low power mode between events and interrupts.

When you want to shut down the chip to system OFF mode, and only wakeup on pin press, then you should use sd_power_system_off(). Typically before calling sd_power_system_off() you should setup some pins to wakeup the chip, this can for instance be done using nrf_gpio_cfg_sense_set(). On wakeup from system off it will start from start of main().

Kenneth