NRF52832 Softreset

[Somesh Burkule]

Hello Everyone,

I am using nrf52832 and sdk 15.2 for BLE scanning and advertising. scanning and advertising is working parallel. this is controlled by other MCU over serial.

but there is random reset in nrf chip. when I tried to find out the reason using sd_power_reset_reason_get(&reset_reason), I got 0x00000004 ( i.e. softreset ).

I am not getting why there is softreset randomly(i.e. once in a hour ). Is it due to UART handler hang?

Please help me resolve the same.

One more question, Is there any chance to soft reset nrf in normal condition which may handled by softdevice?

[Kenneth]

I expect you have an assert, which by default will execute an NVIC_SystemReset() to recover. This is a good idea for a final product, however during prototype development you may want to add DEBUG to the preprocessor symbol such that you in can set a breakpoint to identify file name, line number and error code causing the assert, this is done in app_error_fault_handler().

[Somesh Burkule]

Hi Kenneth,

Thanks you for your quick response.

Actually I have commented assert callback in my code still getting softreset.

void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(0xDEADBEEF, line_num, p_file_name);
}

[Kenneth]

Hi,

The softdevice will not execute any soft reset or other reset. So it must be the application (or bootloader if you have that) that somewhere is calling NVIC_SystemReset().

Best regards,
Kenneth

[Somesh Burkule]

Hi Kenneth,

I have debugged code getting here. Can u please check screenshot.

[Kenneth]

If you look at the Call Stack + Locals window you can see that NVIC_SystemReset is called from app_error_handler_bare.

If you expand your Call Stack + Locals window you can also see where app_error_handler_bare was called.