app_timer_cnt_get() and ble

[Marcos Tadeo]

Hi

I am using app_timer_cnt_get() like MIllis()

uint32_t millis()
{
uint32_t milli;

milli = app_timer_cnt_get() /32.768;

return milli;

}

but when i connect the nrf52840 to NUS(app mobile) using bluetooth,  app_timer_cnt_get() is stopped and i disconnect nrf52840 from NUS bluetooth  app_timer_cnt_get() runs again

i have no idea, what happen 

could you help me pleas , wahts wrong?

thanks 

pd I am beginner 

[ovrebekk]

Hi Marcos

Did you base your example on the ble_app_uart example?

Did you make a lot of changes to the example?

Possibly the app_timer counter will not run if you don't have any timers running. Would you be able to try and run a dummy timer with a callback at regular intervals, and see if the issue goes away?

Best regards
Torbjørn

[Marcos Tadeo]

yes i am using ble_app_uart example , like base example.

now it works , I enabled this option from sdk_config.h

 

enable RTC always on, and now, I connect the device to bluettoh and the funtion  app_timer_cnt_fet() dont stopped again, 

I hope dont  have any problem   

thanks 

[ovrebekk]

Hi Marcos

This makes sense. By default the RTC will be disabled when there are no timers running, in order to optimize power consumption. Enabling this option should fix the issue. 

Best regards
Torbjørn