Kinetis MicrocontrollersのトピックRe: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

cqhcau — Fri, 04 Jun 2021 04:48:12 GMT

Hi,

I develop KEAZ128 MCU with S32DS.When running to the code below(s==4,or2),the MCU stop running.

if (s==4) {

*(CCP_DWORD*)d = *(CCP_DWORD*)p;
} else if (s==2) {
*(CCP_WORD*)d = *(CCP_WORD*)p;
} else {
*d = *p;
}

But, if I change the code to below, it's running ok. I guess the problem it's the pointer.

But the same code running ok on S32K144 MCU.

So, why?

CCP_BYTE i;

if (s==4) {
for(i = 0; i < 4; i++)
{
*d++ = *p++;
}

} else if (s==2) {
for(i = 0; i < 2; i++)
{
*d++ = *p++;
}
} else {
*d = *p;
}

Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

nxf56274 — Fri, 04 Jun 2021 06:40:37 GMT

Hi,

What's the value of d and p?

Have a great day,
TIC

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Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

cqhcau — Fri, 04 Jun 2021 07:01:56 GMT

Hi,

p is a Pointer to a globle variable“vehda_tiECUOn” and d is a Pointer to a address in stack.

Thanks.

Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

nxf56274 — Mon, 07 Jun 2021 02:10:21 GMT

Hi,

If you do not put these operation in wdog, do you meet this problem again?

Have a great day,
TIC

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Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

cqhcau — Mon, 07 Jun 2021 03:09:14 GMT

Hi,

I never put the operation in watchdog.

I just disable the interrupt with " __asm("CPSID i")" before the operation and enable the interrupt after the operation.

Whatever I will test the function again.

Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

nxf56274 — Mon, 07 Jun 2021 06:58:09 GMT

Hi,

I test the usage of pointer you provided on FRDM-k64. It works well. So I think it may be not the pointer problem. I can't reappear the problem. So it is hard to say what causes this result.

Have a great day,
TIC

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Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

cqhcau — Tue, 08 Jun 2021 10:06:51 GMT

Hi,

I test the funtion again.I found when the code running to the two lines below it will get wrong.

00019e90: ldrh r0, [r0,#0]

00019e92: strh r0,[r2,#0]

Do you know why?

I seach on the internet,it said: maybe the pointer point to non aligned address will lead to hard err.Is the reason?

In my project.

CCP_BYTE dtm[8];

d = &dtm[1];

*(CCP_DWORD*)d = *(CCP_DWORD*)p;

Re: KEAZ128-S32DS WDOG_EWM_IrqHandler ERR

nxf56274 — Wed, 09 Jun 2021 03:21:47 GMT

Hi,

You can try to align your two variable. It looks like that the 'd' address is not aligned.

Have a great day,
TIC

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