using Shutoff Mode at initial level

RE: using Shutoff Mode at initial level

JONATHAN LL — Thu, 22 Jul 2021 13:26:51 GMT

If the SD is enabled then you have to use sd_power_gpregret_set to sett the register, ore else you will get a illegal memory access assert when you try tro write to NRF_POWER register.

And if DFU/Bootloader is in use then it that might also use/clear parts of the GPREGRET register.

Regards,
Jonathan

RE: using Shutoff Mode at initial level

vinaysingh — Wed, 21 Jul 2021 11:12:18 GMT

Hi Jonathan,

What SDK and soft device are you using ?

:- nRF SDK 17.02, and soft device pca10040/s132

Please understand My Use-Case :-

1.) when board is powered on, it should be in shutoff mode.

2.) When we press wakeup button it should come out of shutoff mode and then advertise .

But in most of the examples it is like, it will advertise and when become idle then it enters shutoff mode.

Observation :-

As we know after coming out of shutoff mode, the system resets, so even if i put sleep_mode_enter() api, in main function it will always go into shutoff mode.

I tried retained register "GPREGRET" , but no luck.

i am getting a fatal error when i am trying to write the GPREGRET register value.

suggest any method to achieve above use-case !

Thank You !

RE: using Shutoff Mode at initial level

JONATHAN LL — Wed, 21 Jul 2021 09:01:53 GMT

Hi,

I see the link is a bit out dated, here is the BSP BLE Button Assignment in SDK 17.

I belive that you could follow the example and see how it is done there. What SDK and soft device are you using ?

Regards,
Jonathan

RE: using Shutoff Mode at initial level

vinaysingh — Mon, 19 Jul 2021 10:32:22 GMT

Hi jonathan, thanks for your reply !

i have the same use case as mentioned in below link :-

(+) Beaconing application - begin code with system off, press button to wake up - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

But I didn't find anything useful or any reference to understand and achieve the use-case !

in the below main function where should i add the sleep mode enter function ?

static void sleep_mode_enter(void)
{
ret_code_t err_code;

err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);

// Prepare wakeup buttons.
err_code = bsp_btn_ble_sleep_mode_prepare();
APP_ERROR_CHECK(err_code);

// Go to system-off mode (this function will not return; wakeup will cause a reset).
err_code = sd_power_system_off();
APP_ERROR_CHECK(err_code);
}

int main(void)
{
bool erase_bonds;
ret_code_t err_code;

// Initialize.
log_init();
timers_init();
buttons_leds_init(&erase_bonds);
power_management_init();
ble_stack_init();
adc_configure();
gap_params_init();
gatt_init();
advertising_init();
services_init();
conn_params_init();
peer_manager_init();

// Start execution.
NRF_LOG_INFO("Template example started.");
application_timers_start();

advertising_start(erase_bonds);

// Enter main loop.
for (;;)
{
idle_state_handle();
}
}

1.) Suggest any method to achieve the use case !

Thank you !

RE: using Shutoff Mode at initial level

JONATHAN LL — Mon, 19 Jul 2021 07:54:08 GMT

Hi,

Pardon he slow reply, but due to summer holiday there staffing is low and the response time will be slower.

Have you searched on Devzone for similar questions ? Here is a couple of links:

https://devzone.nordicsemi.com/f/nordic-q-a/19882/configuration-of-gpio-to-wake-up-from-system-off

https://devzone.nordicsemi.com/f/nordic-q-a/36475/nrf52832-go-system-off-low-power-mode-and-wakeup-by-gpio

https://devzone.nordicsemi.com/f/nordic-q-a/56518/how-to-set-nrf52-dk-into-sleep-mode-system-on-no-ram-retention-wake-on-rtc-running-from-the-lfxo-clock

https://devzone.nordicsemi.com/f/nordic-q-a/73507/configuring-gpio-to-enter-gpio-interrupt-handler-on-wake-up-from-system-off-mode

https://devzone.nordicsemi.com/f/nordic-q-a/52432/beaconing-application---begin-code-with-system-off-press-button-to-wake-up/211131#211131

https://devzone.nordicsemi.com/f/nordic-q-a/72377/wake-up-button-behavior-after-long-press-system-off

Advertising time
https://devzone.nordicsemi.com/f/nordic-q-a/73352/advertisement-not-started-when-ble_adv_fast_timeout-180s/302650#302650

Regards,
Jonathan

RE: using Shutoff Mode at initial level

vinaysingh — Mon, 19 Jul 2021 05:37:39 GMT

Please answer my query !

Thanks in advance !