topic Re: WDOG interrupt for S32k146 in S32K

WDOG interrupt for S32k146

Shruthi_C — Fri, 10 Feb 2023 07:38:04 GMT

Hi,

I have run the code for WDOG interrupt, after hitting breakpoint in WDOG_ISR the control is not coming to main code, instead it is going some disassembly location, after halting the execution.

Please support on this

Thanks

Re: WDOG interrupt for S32k146

danielmartynek — Fri, 10 Feb 2023 09:27:50 GMT

Hi @Shruthi_C,

The MCU is always reset when the WDOG overflows.

The WDOG interrupt only delays the reset.

The RCM interrupt can delay it further if enabled as it examplainde here:

https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K144-WDOG-RCM-interrupt/ta-p/1107039

It is not possible to halt the execution at a breakpoint within the interrupts.

Regards,

Daniel

Re: WDOG interrupt for S32k146

Shruthi_C — Mon, 13 Feb 2023 08:23:20 GMT

Hi Denil,

Failed to enter main() of application

I am getting errors like this, after WDOG reset

Mon Feb 13, 2023 13:50:26: CPU status - IN RESET

Mon Feb 13, 2023 13:50:26: Notification to init-after-hw-reset hookup.

Mon Feb 13, 2023 13:50:26: DMAC: MDM-AP detected

Mon Feb 13, 2023 13:50:26: Connecting to TAP#0 DAP AHB-AP-CM port 0x0 (IDR=0x2477'0011).

Mon Feb 13, 2023 13:50:26: Recognized CPUID=0x410fc241 Cortex-M4 r0p1 arch ARMv7-M

Mon Feb 13, 2023 13:50:26: Debug resources: 6 instruction comparators, 4 data watchpoints.

Mon Feb 13, 2023 13:50:26: Processor did not stop on external reset.

How can I get the control over to main() after WDOG reset in S32K146

Please support

Thank U

Re: WDOG interrupt for S32k146

danielmartynek — Mon, 13 Feb 2023 09:25:38 GMT

Hi @Shruthi_C,

You need to connect the debugger to the running MCU again after the reset .

I don't know which debugger you use.

BR, Daniel

Re: WDOG interrupt for S32k146

Shruthi_C — Mon, 13 Feb 2023 09:27:07 GMT

Hi,

Using debugger, I-Jet

Thank you

Re: WDOG interrupt for S32k146

danielmartynek — Mon, 13 Feb 2023 09:40:05 GMT

Unfortunately, I have no experience with I-jet / IAR IDE.

I guess it must be described in the documention of the tools.

You can contact IAR system support.

Regards,
Daniel

Re: WDOG interrupt for S32k146

Shruthi_C — Mon, 13 Feb 2023 09:41:13 GMT

Hi,

Ok, Thank you

Re: WDOG interrupt for S32k146

Shruthi_C — Mon, 13 Feb 2023 11:36:36 GMT

Is that WDOG interrupt for S32K146 is working fine with your EVB board, please share the details.

Thank you,

Re: WDOG interrupt for S32k146

Shruthi_C — Mon, 13 Feb 2023 11:38:50 GMT

Hi,

For EVB board if we do power on reset, it will run default code but not what we flashed into it, Is this the same case for WDOG? please confirm

Thank U

Re: WDOG interrupt for S32k146

danielmartynek — Mon, 13 Feb 2023 11:59:42 GMT

Yes, the WDOG interrupt works on the EVBs.

I believe all the details are explained in the document I linked here.

Re: WDOG interrupt for S32k146

danielmartynek — Mon, 13 Feb 2023 12:00:36 GMT

You need to load the project in the the Flash not SRAM.

I think this can be the issue.

BR, Daniel

Re: WDOG interrupt for S32k146

Shruthi_C — Thu, 16 Feb 2023 09:56:32 GMT

Thank you for your response