RTC interrupt causing hard fault

[lybrus]

Hi!

About my application:

SDK 16.0.0.

FreeRTOS and SoftDevice s140.

Peripheral role (buttonless dfu without bonding)

Central role NUS_C

When incoming connection send data over nus i'm getting error.

in task.c

I've tried to change stack size (FreeRTOS and main). Set configCHECK_FOR_STACK_OVERFLOW to 1, vApplicationStackOverflowHook doesn't handle. If I remove ble_db_discovery_start on BLE_GAP_EVT_CONNECTED - everything work.

 

Any assumptions why it might happen? I don't have ideas where to dig. 

[lybrus]

In file $NRF_SDK/components/softdevice/common/nrf_sdh_freertos.c I set NRF_BLE_FREERTOS_SDH_TASK_STACK to 512 and the problem was solved. On my opinion this param should be in sdk_config.h, also softdevice task priority should be in config.

[lybrus]

And it's very strange because vApplicationStackOverflowHook caught nothing.

[Susheel Nuguru]

it is not guaranteed that configCHECK_FOR_STACK_OVERFLOW will catch the overflow for sure. it might miss it sometimes. But I would recommend you to set configCHECK_FOR_STACK_OVERFLOW  to 2 only for debugging to have higher probability of catching the stack overflow.

[lybrus]

Make sense, thanks.