topic Re: hard fault error in S32K

hard fault error

xiabin — Tue, 04 Jan 2022 04:51:20 GMT

I use S32K144 MCU. The program runs for a few minute and triggers hardfault.

I USE fualt_exceptions.c/.h to to find the problem. track the PC pointer and stack address of the problem.

stack address is 0x20006f8a，is right。

Track the PC， fault occurs when entering various interrupts(ADC, LPTR, UART etc)，The asm is push {r3, lr} as shown in the figure.

What's the reason for this program ?

Re: hard fault error

danielmartynek — Tue, 04 Jan 2022 10:13:46 GMT

Hi @xiabin,

What kind of exception is it? Bus fault, Usage fault?

What do you read in CFSR?

Can you share the project so that I can test it?

BR, Daniel

Re: hard fault error

xiabin — Sat, 08 Jan 2022 13:08:15 GMT

Sorry, I can't upload my project.
the CFSR = 0x00000100,
I have three boards, only one has this problem, I replaced the crystal oscillator, the probability of failure decreased, but still there.

Re: hard fault error

danielmartynek — Tue, 11 Jan 2022 10:35:41 GMT

Hi @xiabin.

So it is IBUSERR.

Since it is detected after fetching the vector table, can you please double check the vectors?

BR, Daniel