RAM reset after softreset | nrf52832 | sdk 15.2 | softdevice 6.1.0

[Somesh Burkule]

Hi,

I need to reset RAM after softreset. As I read product specification, RAM cannot be cleared after softreset or CPU lockup.

Please see below image for reference.

How can I clear total RAM after softreset( NVIC_SystemReset() )?

[Somesh Burkule]

I tried with that also still facing an issue.

what if wrong values passed to ble stack for advertiser and scanner?

Does "APP_ERROR_HANDLER(p_event->data.error_communication);" causes hardfault? 

[Vidar Berg]

Can you post your updated uart callback? A APP_UART_COMMUNICATION_ERROR does not cause a hardfault by itself.

[Somesh Burkule]

Hi Vidar Berg,

please check uart callback given below:

void uart_event_handle(app_uart_evt_t * p_event)
{
   
	switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            UNUSED_VARIABLE(app_uart_get(&cmd_Data.raw_Data[index]));
						
            index++;
				
            if (cmd_Data.raw_Data[index - 1] == ';')
            {
								cmdRxFlg = true;
            }
						
            break;

        case APP_UART_COMMUNICATION_ERROR:
            
							//APP_ERROR_HANDLER(p_event->data.error_communication);
				
            break;

        case APP_UART_FIFO_ERROR:
				
							APP_ERROR_HANDLER(p_event->data.error_code);
				
            break;

        default:
            break;
    }
}

[Vidar Berg]

Hi,

There does not seem to be anything to trigger a hardfault on APP_UART_COMMUNICATION_ERROR. Are you still able to reproduce the same stack trace you shared with Jared, or is it different now?

[Somesh Burkule]

Hi Vidar Berg,

yes, I am only getting this one. I am not confirm about hardfault is due communication error or not.

Actually when I kept my device on for long time, after some time( 1-2 days or once in day )nordic not responding to other MCU. when I power OFF and ON device again it works ok.

today I got one point that I have not used uart flush in application anywhere. so I;ll add it now. will this affect something?

there may stack overflow due to that may cpu lockup but I need to confirm it.

can I enable hardfault handler? what does this do?