S32KのトピックRe: S32K312 EVB DEBUG

S32K312 EVB DEBUG

PINKMAN — Tue, 16 Sep 2025 05:07:03 GMT

Hello:

I made a really stupid mistake. I configured the debug port of the S32K31XEVB-Q100 as a regular GPIO, which now prevents me from downloading programs via the debug port. Could you please tell me if there are any solutions to this problem?

As an addition, I am using an external debugger instead of the on-board OPEN-SDA.

Re: S32K312 EVB DEBUG

danielmartynek — Tue, 16 Sep 2025 08:02:36 GMT

Hi @PINKMAN,

To ensure successful debugging, the MCU must be reset and the debugger must connect and halt the core within the brief time window before the pins are reconfigured.

Did you also reconfigure the reset_b pin?

If so, the only reliable way to reset the MCU is via a Power-On Reset (POR).

What debugger are you using?

For example, if you're using Lauterbach, you can use a script like this:

SYStem.CPU S32K312-M7 SYStem.config.core 1. 1. SYStem.config.debugporttype JTAG System.JTAGclock 10MHz sys.Option DUALPORT ON wait state.power() sys.up if RUN() break

It waits until the MCU is powered.

Regards,

Daniel

Re: S32K312 EVB DEBUG

PINKMAN — Tue, 16 Sep 2025 08:26:14 GMT

I only configured PTA4 (JTAG_TMS_SWD_DIO) as CMP_OUT and did not configure other debugging pins. The debugger we use is JLINK. Could you please tell me if there is any way to solve this problem?

Re: S32K312 EVB DEBUG

danielmartynek — Tue, 16 Sep 2025 08:53:31 GMT

Can you try this solution?

https://community.nxp.com/t5/S32-SDK/failed-to-power-up-dap-after-program-s32k312-with-pll0-equal/td-p/1609010

Thank you,

BR, Daniel

Re: S32K312 EVB DEBUG

PINKMAN — Wed, 17 Sep 2025 03:19:32 GMT

according your suggestion, it not works, the picture is my step,can you tell me what happened. my debug is SWD mode,thanks

Re: S32K312 EVB DEBUG

danielmartynek — Wed, 17 Sep 2025 06:04:48 GMT

Can you try JTAG protocol too?

Thank you

Re: S32K312 EVB DEBUG

PINKMAN — Wed, 17 Sep 2025 08:02:35 GMT

i try all of the two mode ,still not work

Re: S32K312 EVB DEBUG

PINKMAN — Wed, 17 Sep 2025 08:09:37 GMT

can you configured PTA4 (JTAG_TMS_SWD_DIO) as CMP_OUT if you have a S32K31XEVB-Q100,and try to unlock it use jlink command

Re: S32K312 EVB DEBUG

danielmartynek — Mon, 22 Sep 2025 06:09:51 GMT

Hi @PINKMAN,

I contacted SEGGER support, and they confirmed that there is a bug in the algorithm.
They are currently working on a fix. Once it's available, I will update the thread accordingly.

Regards,

Daniel

Re: S32K312 EVB DEBUG

danielmartynek — Thu, 06 Nov 2025 12:25:29 GMT

Hi @PINKMAN,

Segger has fixed the issue, the change will be included in version V8.88, scheduled to be released on November 12th.

Regards,

Daniel