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() )?

[Vidar Berg]

Hi,

Ok, a stack overflow or a buffer overrun sounds likely to me. It's a good idea to enable the HardFault handling library, it may help you determine what caused it. Remember to also enable debug logging, add DEBUG flag to preprocessor list, and disable compiler optimization to get as much error information as possible.

Somesh Burkule said:

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?

 When would you want to flush the FIFO buffer? It will just remove the received UART data you may have received from RAM.

Also, please add a check on the 'index' variable before the "UNUSED_VARIABLE(app_uart_get(&cmd_Data.raw_Data[index]));" line, in case there is a chance it may be incremented beyond the buffer size.

eg.

if ( index >= "size of raw data buffer in bytes")
{
   NRF_LOG_ERROR("Index is out of bounds with the value: %d", index");     
   APP_ERROR_CHECK(NRF_ERROR_INVALID_LENGTH);
}

[Somesh Burkule]

Vidar Berg said:

It's a good idea to enable the HardFault handling library

can I use it in production? or is it only used for debugging?

one more thing, I am using printf() to sent transmit data to other MCU via UART.

does it affect application? I am sending 10000bytes/500ms

[Somesh Burkule]

Hi Vidar Berg,

Awaiting your reply.

Thanks,

Somesh Burkule

[Vidar Berg]

I need more debug information from you to be able to help find the root cause. So please do what I suggested earlier and let me know when you have new information to share.

Somesh Burkule said:

can I use it in production? or is it only used for debugging?

 This is answered in the documentation I linked to. The short answer is yes.

Somesh Burkule said:

I am using printf() to sent transmit data to other MCU via UART.

does it affect application?

I don't think it's related to the hardfault if that's what you're asking.