topic Re: SWO Interrupt - SWO Overflow in i.MX RT Crossover MCUs

SWO Interrupt - SWO Overflow

pb2 — Fri, 19 Jun 2020 15:11:28 GMT

Hi,

I have problems with SWO trace. The "SWO Interrupts" shows an event OVERFLOW within the "Table" tab continuously as shown in the following picture.

Why does SWO overflow occur so often? I also get many wrong interrupts within the "Statistics" tab. These are Interrupts that i never use in my project.

It seems to me the SWO configuration is correct when I download my firmware with the debugger.

I am using iMXRT1050 with a custom board and LPC-Link2 and i apply the configuration according to the following link.

SWO with NXP i.MX RT1064-EVK Board

My MCUXpresso version is MCUXpresso IDE v11.1.1 [Build 3241] [2020-03-02] and the used SDK version is SDK_2.x_EVKB-IMXRT1050.

Kind regards,

Patrick

Re: SWO Interrupt - SWO Overflow

Sabina_Bruce — Mon, 22 Jun 2020 17:36:18 GMT

Hello Patrick,

Hope you are doing well.

Since you are working with a custom board it will be difficult for me to pin point the issue right away. I'd like to be able to reproduce this on my end, but I have the evaluation board. Do you have an evaluation board that you can reproduce this error?

Are you basing this test on an example from the SDK?

Best Regards,

Sabina

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Re: SWO Interrupt - SWO Overflow

pb2 — Thu, 25 Jun 2020 08:34:11 GMT

Hello Sabina,

I found another tutorial that describes SWO trace Tutorial: Using Single Wire Output SWO with ARM Cortex-M and Eclipse | MCU on Eclipse.
I have adapted to my application and it works.

Have a nice day!
Patrick

Re: SWO Interrupt - SWO Overflow

Sabina_Bruce — Thu, 25 Jun 2020 23:00:11 GMT

I'm glad that you were able to resolve this!

Best Regards,

Sabina