S32K312 EVB DEBUG

[PINKMAN]

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.

[danielmartynek]

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

[PINKMAN]

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?

[danielmartynek]

Can you try this solution?

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

Thank you,

BR, Daniel

[PINKMAN]

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

[danielmartynek]

Can you try JTAG protocol too?

Thank you

[PINKMAN]

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

[danielmartynek]

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

[danielmartynek]

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

[PINKMAN]

i try all of the two mode ,still not work