NRF52832 ble peripheral hardfault

[Choi Hyunseok]

Hello~

I am experiencing hardfault occasionally. (once a day ~ once in 3 days)

I am testing 14 boards to catch hardfault.

 

The following is my setup

- hardware : nrf52832-based customized board

- sdk version : 14.2

- softdevice version : S132 5.0.0

- firmware : ble peripheral (notification at regular interval)

 

Here is the 5 hardfault messages from each different board.

No.	PC (hardfault address)	LR	PSR	Stack address	Cause
1	0x20003ACC	0x00013D6D	0x41000000	0x2000B9F8	The processor has attempted to access a coprocessor.
2	0x200039FE	0x00013D6D	0x21000000	0x2000B9F8	The processor has attempted to execute an undefined instruction.
3	0x200039FE	0x00013D6D	0x81000000	0x2000B9F8	The processor has attempted to execute an undefined instruction.
4	0x200039FE	0x00013D6D	0x21000000	0x2000B9F8	The processor has attempted to execute an undefined instruction.
5	0x200039FE	0x00013D6D	0x21000000	0x2000B9F8	The processor has attempted to execute an undefined instruction.

STACK$$Base 0x20009AB8, STACK$$Limit 0x2000BAB8

 

What I have found is

- PC is not code region but application data region.

- LR is code region within the softdevice. The address(0x00013D6D) always the same.

 

Could you guide me to analyze further? Also, I would like to know there is any known issue relating to softdevice.

[smackenzie]

I would guess memory corruption. It looks like a callback handler is being overwritten. Could be you are overflowing a buffer by copying more data than the buffer can hold.

[Choi Hyunseok]

Hi, smackenzie

Thanks for your comment.

I'll examine all callback handlers carefully.

Best regards,
Choi Hyunseok