S32 SDKのトピックRe: s32k116 hardfault handler

s32k116 hardfault handler

Dinesh_Guleria — Mon, 10 Jan 2022 08:29:40 GMT

Hi NXP Application team,

Do we have some sample code where s32k116 hardfault handler is implemeted. So that we can trace from which instruction this hardfault occurred ?

Can i use same process as mentioned in this link :--
https://mcuoneclipse.com/2012/11/24/debugging-hard-faults-on-arm-cortex-m/

Please suggest.

Regards
Dinesh

Re: s32k116 hardfault handler

danielmartynek — Mon, 10 Jan 2022 15:52:18 GMT

Hi @Dinesh_Guleria,

Unfortunately, we have no such example for S32K1xx (Cortex M0+).

The article you posted is for S32K14x (Cotex M4).

You can follow the steps here:

https://community.arm.com/support-forums/f/embedded-forum/3257/debugging-a-cortex-m0-hard-fault

You can read the stack in the memory view, there is no need to have the stacked PC stored in a variable, if you know how to read the stack.

Regards,

Daniel

Re: s32k116 hardfault handler

Dinesh_Guleria — Mon, 10 Jan 2022 16:17:39 GMT

@danielmartynek ,

Thanks for your reply.

Link you shared do not contain any solution how to do this task.

>>You can read the stack in the memory view, there is no need to have the stacked PC stored in a variable, if you know how to read the stack.

Please can you suggest how to read the stack..?

Regards,

Dinesh

Re: s32k116 hardfault handler

danielmartynek — Thu, 13 Jan 2022 08:55:58 GMT

Hi @Dinesh_Guleria,

There is a lot of useful information in the thread, please read it again.

An example on S32K116:

Read an unimplemented memory (0x80000):

volatile uint32_t read = *((uint32_t*)0x00080000);

void HardFault_Handler(void){ while(1){ } }

Read the stack from the fault handler

In memory view, SP + 0x18

Find the instruction:

Regards,

Daniel

Re: s32k116 hardfault handler

Dinesh_Guleria — Tue, 18 Jan 2022 08:38:57 GMT

@danielmartynek

Thanks for your reply, it is clear to me.

Where exactly this figure comes from :--
In memory view, SP + 0x18.

Please suggest.

Regards,
Dinesh

Re: s32k116 hardfault handler

danielmartynek — Tue, 18 Jan 2022 14:16:43 GMT

Hello @Dinesh_Guleria,

This is a speudo code from ARM®v6-M Architecture Reference Manual

Regards,

Daniel