S32KのトピックRe: Application doesn’t run after exiting Debug mode

Application doesn’t run after exiting Debug mode

adem_marangoz — Tue, 08 Jul 2025 10:05:41 GMT

Hello everyone,
I am using S32K311 with S32DS IDE
I’m facing an issue where my application works perfectly when running under the debugger, but it fails to start when I power-cycle the board.

Here’s what I’ve done:

I modified the linker script and placed the heap in the DTCM region under the name int_adem_dtcm.
During debugging, the program runs without any issues.
However, when I reset or restart the board without the debugger, the application does not run.

I’ve attached the modified linker script for reference.

Has anyone experienced a similar issue? Could it be related to startup code, memory initialization, or DTCM configuration?

Any insights or suggestions would be greatly appreciated!

Re: Application doesn’t run after exiting Debug mode

petervlna — Tue, 08 Jul 2025 11:37:55 GMT

Hello,

What comes to my mind is watchdog SWT.

Debuggers by default disable watchdog in debug mode, so you can perform debug.

Make sure your SWT is disabled / services correctly.

You can check RGM module DES and FES modules for any latched reset sources.

However, when I reset or restart the board without the debugger, the application does not run.

Also I am not sure what "does not run" means....

Is SW stuck in some loop,. reset, exception, etc..... ?

Additionally debuggers perform various initializations like RAM initialization to be able load binaries for communication with device via scripts, which are not always visible to user.

You can also check FCCU NCFSx registers to see if any fault is latched there, this will give you a good hint where to look.

Best regards,

Peter

Re: Application doesn’t run after exiting Debug mode

adem_marangoz — Tue, 08 Jul 2025 12:02:23 GMT

This is the main program that I have attached.
I don’t know if it is entering an exception.
I check if the program is running by observing the LED that turns on and off in the while loop.
In the driver settings, I did not add the SWT. Is there a default SWT that gets enabled?

Re: Application doesn’t run after exiting Debug mode

petervlna — Wed, 09 Jul 2025 07:25:43 GMT

Hello,

SWT0 is by default disabled.

But this also depends on IVT configuration which you load into uC.

Best regards,

Peter