S32KのトピックRe: SWD problem on s32k144

SWD problem on s32k144

lohrsistemas — Tue, 21 Aug 2018 19:05:00 GMT

I have successfully programmed my device but now I cannot connect with MCU.

I use SWD interface. It can be the case that I use SWD pins as output and in my code I set PTA4 and PTA5 as output. Can it be the case?

What can I do?

Re: SWD problem on s32k144

danielmartynek — Tue, 21 Aug 2018 21:06:41 GMT

Hi,

It seems to be the case.

It was discussed in this thread: https://community.nxp.com/message/987643

You can use the PEmicro recovery utility mentioned in the thread.

Regards,

Daniel

Re: SWD problem on s32k144

lohrsistemas — Wed, 22 Aug 2018 11:28:26 GMT

Hi Daniel,
I did not have the hardware PE micro, so I tried with the SEGGER.
Trying several times to reset the power of my board, had a moment when I was able to program it.

Okay, that saved my board. However I will go through this problem if I have to use these pins in a project where the pins of the MCU are completely used, and the last resort is to share the SWD pins. I suggest having some commentary on the datasheet of this item, guiding the risks of using SWD pins for general purposes.